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  • 1
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    A century of Alzheimer's disease (2006)
    American Association for the Advancement of Science (AAAS)
    Details
    Publikationsdatum: 2006-11-04
    Beschreibung: One hundred years ago a small group of psychiatrists described the abnormal protein deposits in the brain that define the most common neurodegenerative diseases. Over the past 25 years, it has become clear that the proteins forming the deposits are central to the disease process. Amyloid-beta and tau make up the plaques and tangles of Alzheimer's disease, where these normally soluble proteins assemble into amyloid-like filaments. Tau inclusions are also found in a number of related disorders. Genetic studies have shown that dysfunction of amyloid-beta or tau is sufficient to cause dementia. The ongoing molecular dissection of the neurodegenerative pathways is expected to lead to a true understanding of disease pathogenesis.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Goedert, Michel -- Spillantini, Maria Grazia -- G0301152/Medical Research Council/United Kingdom -- MC_U105184291/Medical Research Council/United Kingdom -- New York, N.Y. -- Science. 2006 Nov 3;314(5800):777-81.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Laboratory of Molecular Biology, Medical Research Council, Cambridge CB2 2QH, UK. mg@mrc-lmb.cam.ac.uk〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/17082447" target="_blank"〉PubMed〈/a〉
    Schlagwort(e): *Alzheimer Disease/genetics/history/metabolism/pathology ; Amyloid beta-Peptides/chemistry/metabolism ; Amyloid beta-Protein Precursor/genetics/metabolism ; Animals ; Apolipoproteins E/genetics ; Brain/pathology ; Brain Chemistry ; History, 20th Century ; Humans ; Mutation ; Neurofibrillary Tangles/chemistry/pathology ; Plaque, Amyloid/chemistry/pathology ; Presenilin-1/genetics/metabolism ; tau Proteins/chemistry/genetics/metabolism
    Print ISSN: 0036-8075
    Digitale ISSN: 1095-9203
    Thema: Biologie , Chemie und Pharmazie , Informatik , Medizin , Allgemeine Naturwissenschaft , Physik
    Publiziert von American Association for the Advancement of Science (AAAS)
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  • 2
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    Emergence of drug-resistant influenza virus: population dynamical considerations (2006)
    American Association for the Advancement of Science (AAAS)
    Details
    Publikationsdatum: 2006-04-22
    Beschreibung: Given the considerable challenges to the rapid development of an effective vaccine against influenza, antiviral agents will play an important role as a first-line defense if a new pandemic occurs. The large-scale use of drugs for chemoprophylaxis and treatment will impose strong selection for the evolution of drug-resistant strains. The ensuing transmission of those strains could substantially limit the effectiveness of the drugs as a first-line defense. Summarizing recent data on the rate at which the treatment of influenza infection generates resistance de novo and on the transmission fitness of resistant virus, we discuss possible implications for the epidemiological spread of drug resistance in the context of an established population dynamic model.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Regoes, Roland R -- Bonhoeffer, Sebastian -- New York, N.Y. -- Science. 2006 Apr 21;312(5772):389-91.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Institute of Integrative Biology, ETH Zurich, ETH Zentrum CHN K12.1, Universitatsstrasse 16, CH 8092 Zurich, Switzerland.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/16627735" target="_blank"〉PubMed〈/a〉
    Schlagwort(e): Acetamides/pharmacology/therapeutic use ; Amantadine/pharmacology/therapeutic use ; Antiviral Agents/*pharmacology/*therapeutic use ; Computer Simulation ; Disease Outbreaks ; *Drug Resistance, Viral/genetics ; Humans ; Influenza A virus/*drug effects/genetics/pathogenicity ; Influenza, Human/*drug therapy/epidemiology/*prevention & control/virology ; Mathematics ; Models, Biological ; Mutation ; Neuraminidase/antagonists & inhibitors ; Orthomyxoviridae/*drug effects/genetics/pathogenicity ; Oseltamivir ; Population Dynamics
    Print ISSN: 0036-8075
    Digitale ISSN: 1095-9203
    Thema: Biologie , Chemie und Pharmazie , Informatik , Medizin , Allgemeine Naturwissenschaft , Physik
    Publiziert von American Association for the Advancement of Science (AAAS)
    Standort Signatur Erwartet Verfügbarkeit
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  • 3
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    Cancer biomarkers--an invitation to the table (2006)
    American Association for the Advancement of Science (AAAS)
    Details
    Publikationsdatum: 2006-05-27
    Beschreibung: The allure of the emerging genomic technologies in cancer is their ability to generate new biomarkers that predict how individual cancer patients will respond to various treatments. However, productive implementation of cancer biomarkers into patient care will require fundamental changes in how we consider approvals for cancer indications and how we track patient responses. Here we briefly describe ongoing efforts to identify and to validate cancer biomarkers, discuss the technological hurdles that lie ahead, and then focus on the more pressing political and cultural issues that, if left unheeded, could derail many of the anticipated benefits of biomarker research.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Dalton, William S -- Friend, Stephen H -- New York, N.Y. -- Science. 2006 May 26;312(5777):1165-8.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉H. Lee Moffitt Cancer Center, University of South Florida, Tampa, FL 33613, USA. dalton@moffitt.usf.edu〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/16728629" target="_blank"〉PubMed〈/a〉
    Schlagwort(e): Academies and Institutes ; *Biomarkers, Tumor ; Biotechnology ; Clinical Trials as Topic ; Databases, Factual ; Drug Industry ; Gene Expression Regulation, Neoplastic ; Genomics ; Humans ; Intellectual Property ; Interprofessional Relations ; Mutation ; Neoplasms/genetics/*therapy ; *Patient Care Management ; Private Sector ; Proteomics ; Public Sector
    Print ISSN: 0036-8075
    Digitale ISSN: 1095-9203
    Thema: Biologie , Chemie und Pharmazie , Informatik , Medizin , Allgemeine Naturwissenschaft , Physik
    Publiziert von American Association for the Advancement of Science (AAAS)
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  • 4
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    DNA testing. Genetic screen misses mutations in women at high risk of breast cancer (2006)
    American Association for the Advancement of Science (AAAS)
    Details
    Publikationsdatum: 2006-04-01
    Beschreibung: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Stokstad, Erik -- New York, N.Y. -- Science. 2006 Mar 31;311(5769):1847.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/16574828" target="_blank"〉PubMed〈/a〉
    Schlagwort(e): Breast Neoplasms/*genetics ; DNA Mutational Analysis ; False Negative Reactions ; Female ; *Genes, BRCA1 ; *Genes, BRCA2 ; *Genetic Testing ; Humans ; Mutation ; Nucleic Acid Amplification Techniques ; Ovarian Neoplasms/*genetics ; Sensitivity and Specificity
    Print ISSN: 0036-8075
    Digitale ISSN: 1095-9203
    Thema: Biologie , Chemie und Pharmazie , Informatik , Medizin , Allgemeine Naturwissenschaft , Physik
    Publiziert von American Association for the Advancement of Science (AAAS)
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  • 5
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    Evolution of hormone-receptor complexity by molecular exploitation (2006)
    American Association for the Advancement of Science (AAAS)
    Details
    Publikationsdatum: 2006-04-08
    Beschreibung: According to Darwinian theory, complexity evolves by a stepwise process of elaboration and optimization under natural selection. Biological systems composed of tightly integrated parts seem to challenge this view, because it is not obvious how any element's function can be selected for unless the partners with which it interacts are already present. Here we demonstrate how an integrated molecular system-the specific functional interaction between the steroid hormone aldosterone and its partner the mineralocorticoid receptor-evolved by a stepwise Darwinian process. Using ancestral gene resurrection, we show that, long before the hormone evolved, the receptor's affinity for aldosterone was present as a structural by-product of its partnership with chemically similar, more ancient ligands. Introducing two amino acid changes into the ancestral sequence recapitulates the evolution of present-day receptor specificity. Our results indicate that tight interactions can evolve by molecular exploitation-recruitment of an older molecule, previously constrained for a different role, into a new functional complex.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Bridgham, Jamie T -- Carroll, Sean M -- Thornton, Joseph W -- F32-GM074398/GM/NIGMS NIH HHS/ -- New York, N.Y. -- Science. 2006 Apr 7;312(5770):97-101.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Center for Ecology and Evolutionary Biology, University of Oregon, Eugene, OR 97403, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/16601189" target="_blank"〉PubMed〈/a〉
    Schlagwort(e): Aldosterone/chemistry/*metabolism ; Amino Acid Substitution ; Animals ; Bayes Theorem ; Binding Sites ; Desoxycorticosterone/metabolism ; *Evolution, Molecular ; Gene Duplication ; Hagfishes ; Hydrocortisone/metabolism ; Lampreys ; Ligands ; Mutation ; Perciformes ; Phylogeny ; Rats ; Receptors, Glucocorticoid/chemistry/genetics/metabolism ; Receptors, Mineralocorticoid/chemistry/*genetics/*metabolism ; Receptors, Steroid/chemistry/*genetics/*metabolism ; Skates (Fish)
    Print ISSN: 0036-8075
    Digitale ISSN: 1095-9203
    Thema: Biologie , Chemie und Pharmazie , Informatik , Medizin , Allgemeine Naturwissenschaft , Physik
    Publiziert von American Association for the Advancement of Science (AAAS)
    Standort Signatur Erwartet Verfügbarkeit
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  • 6
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    Rice domestication by reducing shattering (2006)
    American Association for the Advancement of Science (AAAS)
    Details
    Publikationsdatum: 2006-03-11
    Beschreibung: Crop domestication frequently began with the selection of plants that did not naturally shed ripe fruits or seeds. The reduction in grain shattering that led to cereal domestication involved genetic loci of large effect. The molecular basis of this key domestication transition, however, remains unknown. Here we show that human selection of an amino acid substitution in the predicted DNA binding domain encoded by a gene of previously unknown function was primarily responsible for the reduction of grain shattering in rice domestication. The substitution undermined the gene function necessary for the normal development of an abscission layer that controls the separation of a grain from the pedicel.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Li, Changbao -- Zhou, Ailing -- Sang, Tao -- New York, N.Y. -- Science. 2006 Mar 31;311(5769):1936-9. Epub 2006 Mar 9.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Plant Biology, Michigan State University, East Lansing, MI 48824, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/16527928" target="_blank"〉PubMed〈/a〉
    Schlagwort(e): Alleles ; Amino Acid Sequence ; Amino Acid Substitution ; Biological Evolution ; Chromosome Mapping ; Computational Biology ; Crops, Agricultural/*genetics/growth & development ; Flowers/growth & development ; Gene Expression ; Genes, Plant ; Genotype ; Molecular Sequence Data ; Mutation ; Oryza/cytology/*genetics/growth & development ; Phenotype ; Plant Proteins/chemistry/*genetics ; Plants, Genetically Modified ; Quantitative Trait Loci ; Reverse Transcriptase Polymerase Chain Reaction ; Sequence Analysis, DNA ; Transcription Factors/chemistry/*genetics ; Transformation, Genetic
    Print ISSN: 0036-8075
    Digitale ISSN: 1095-9203
    Thema: Biologie , Chemie und Pharmazie , Informatik , Medizin , Allgemeine Naturwissenschaft , Physik
    Publiziert von American Association for the Advancement of Science (AAAS)
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  • 7
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    Ammonia channel couples glutaminase with transamidase reactions in GatCAB (2006)
    American Association for the Advancement of Science (AAAS)
    Details
    Publikationsdatum: 2006-07-01
    Beschreibung: The formation of glutaminyl transfer RNA (Gln-tRNA(Gln)) differs among the three domains of life. Most bacteria employ an indirect pathway to produce Gln-tRNA(Gln) by a heterotrimeric glutamine amidotransferase CAB (GatCAB) that acts on the misacylated Glu-tRNA(Gln). Here, we describe a series of crystal structures of intact GatCAB from Staphylococcus aureus in the apo form and in the complexes with glutamine, asparagine, Mn2+, and adenosine triphosphate analog. Two identified catalytic centers for the glutaminase and transamidase reactions are markedly distant but connected by a hydrophilic ammonia channel 30 A in length. Further, we show that the first U-A base pair in the acceptor stem and the D loop of tRNA(Gln) serve as identity elements essential for discrimination by GatCAB and propose a complete model for the overall concerted reactions to synthesize Gln-tRNA(Gln).〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Nakamura, Akiyoshi -- Yao, Min -- Chimnaronk, Sarin -- Sakai, Naoki -- Tanaka, Isao -- New York, N.Y. -- Science. 2006 Jun 30;312(5782):1954-8.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Faculty of Advanced Life Sciences, Hokkaido University, Sapporo 060-0810, Japan.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/16809541" target="_blank"〉PubMed〈/a〉
    Schlagwort(e): Adenosine Diphosphate/metabolism ; Amino Acid Sequence ; Aminoacyltransferases/metabolism ; Ammonia/*metabolism ; Apoenzymes/chemistry/metabolism ; Asparagine/metabolism ; Base Pairing ; Catalytic Domain ; Crystallography, X-Ray ; Glutaminase/metabolism ; Glutamine/*chemistry/metabolism ; Hydrogen Bonding ; Hydrophobic and Hydrophilic Interactions ; Magnesium/metabolism ; Manganese/metabolism ; Models, Molecular ; Molecular Sequence Data ; Mutation ; Nucleic Acid Conformation ; Protein Structure, Quaternary ; Protein Structure, Secondary ; Protein Structure, Tertiary ; Protein Subunits ; RNA, Bacterial/chemistry/metabolism ; RNA, Transfer, Amino Acyl/chemistry/*metabolism ; RNA, Transfer, Gln/*chemistry/metabolism ; Staphylococcus aureus/*enzymology/genetics/metabolism
    Print ISSN: 0036-8075
    Digitale ISSN: 1095-9203
    Thema: Biologie , Chemie und Pharmazie , Informatik , Medizin , Allgemeine Naturwissenschaft , Physik
    Publiziert von American Association for the Advancement of Science (AAAS)
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  • 8
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    Selective silencing of foreign DNA with low GC content by the H-NS protein in Salmonella (2006)
    American Association for the Advancement of Science (AAAS)
    Details
    Publikationsdatum: 2006-06-10
    Beschreibung: Horizontal gene transfer plays a major role in microbial evolution. However, newly acquired sequences can decrease fitness unless integrated into preexisting regulatory networks. We found that the histone-like nucleoid structuring protein (H-NS) selectively silences horizontally acquired genes by targeting sequences with GC content lower than the resident genome. Mutations in hns are lethal in Salmonella unless accompanied by compensatory mutations in other regulatory loci. Thus, H-NS provides a previously unrecognized mechanism of bacterial defense against foreign DNA, enabling the acquisition of DNA from exogenous sources while avoiding detrimental consequences from unregulated expression of newly acquired genes. Characteristic GC/AT ratios of bacterial genomes may facilitate discrimination between a cell's own DNA and foreign DNA.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Navarre, William Wiley -- Porwollik, Steffen -- Wang, Yipeng -- McClelland, Michael -- Rosen, Henry -- Libby, Stephen J -- Fang, Ferric C -- AI034829/AI/NIAID NIH HHS/ -- AI049417/AI/NIAID NIH HHS/ -- AI052237/AI/NIAID NIH HHS/ -- AI057733/AI/NIAID NIH HHS/ -- AI39557/AI/NIAID NIH HHS/ -- AI48622/AI/NIAID NIH HHS/ -- New York, N.Y. -- Science. 2006 Jul 14;313(5784):236-8. Epub 2006 Jun 8.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Laboratory Medicine, University of Washington, Seattle, WA 98195, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/16763111" target="_blank"〉PubMed〈/a〉
    Schlagwort(e): Bacterial Proteins/genetics/*metabolism ; Base Composition ; Binding Sites ; Chromatin Immunoprecipitation ; DNA, Bacterial/*chemistry/*genetics ; DNA-Binding Proteins/genetics/*metabolism ; Gene Expression Regulation, Bacterial ; *Gene Silencing ; *Gene Transfer, Horizontal ; Genome, Bacterial ; Helicobacter pylori/genetics ; Models, Genetic ; Mutation ; Oligonucleotide Array Sequence Analysis ; Repressor Proteins/genetics/*metabolism ; Salmonella typhimurium/*genetics/physiology
    Print ISSN: 0036-8075
    Digitale ISSN: 1095-9203
    Thema: Biologie , Chemie und Pharmazie , Informatik , Medizin , Allgemeine Naturwissenschaft , Physik
    Publiziert von American Association for the Advancement of Science (AAAS)
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  • 9
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    alphaE-catenin controls cerebral cortical size by regulating the hedgehog signaling pathway (2006)
    American Association for the Advancement of Science (AAAS)
    Details
    Publikationsdatum: 2006-03-18
    Beschreibung: During development, cells monitor and adjust their rates of accumulation to produce organs of predetermined size. We show here that central nervous system-specific deletion of the essential adherens junction gene, alphaE-catenin, causes abnormal activation of the hedgehog pathway, resulting in shortening of the cell cycle, decreased apoptosis, and cortical hyperplasia. We propose that alphaE-catenin connects cell-density-dependent adherens junctions with the developmental hedgehog pathway and that this connection may provide a negative feedback loop controlling the size of developing cerebral cortex.〈br /〉〈br /〉〈a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC2556178/" target="_blank"〉〈img src="https://static.pubmed.gov/portal/portal3rc.fcgi/4089621/img/3977009" border="0"〉〈/a〉   〈a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC2556178/" target="_blank"〉This paper as free author manuscript - peer-reviewed and accepted for publication〈/a〉〈br /〉〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Lien, Wen-Hui -- Klezovitch, Olga -- Fernandez, Tania E -- Delrow, Jeff -- Vasioukhin, Valeri -- P41 RR011823/RR/NCRR NIH HHS/ -- P41 RR011823-128171/RR/NCRR NIH HHS/ -- R01 CA098161/CA/NCI NIH HHS/ -- R01 CA098161-01A1/CA/NCI NIH HHS/ -- R01 CA098161-02/CA/NCI NIH HHS/ -- R01 CA098161-03/CA/NCI NIH HHS/ -- R01 CA098161-04/CA/NCI NIH HHS/ -- New York, N.Y. -- Science. 2006 Mar 17;311(5767):1609-12.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Division of Human Biology, Fred Hutchinson Cancer Research Center, Seattle, WA 98109, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/16543460" target="_blank"〉PubMed〈/a〉
    Schlagwort(e): Adherens Junctions/*physiology/ultrastructure ; Animals ; Apoptosis ; Cell Adhesion ; Cell Count ; Cell Cycle ; Cell Differentiation ; Cell Polarity ; Central Nervous System/embryology ; Cerebral Cortex/cytology/*embryology/pathology/physiology ; Hedgehog Proteins ; Hyperplasia ; Mice ; Mitosis ; Models, Biological ; Mutation ; Neurons/cytology/*physiology/ultrastructure ; Oligonucleotide Array Sequence Analysis ; *Signal Transduction ; Stem Cells/cytology/ultrastructure ; Trans-Activators/*metabolism ; Up-Regulation ; alpha Catenin/genetics/*physiology
    Print ISSN: 0036-8075
    Digitale ISSN: 1095-9203
    Thema: Biologie , Chemie und Pharmazie , Informatik , Medizin , Allgemeine Naturwissenschaft , Physik
    Publiziert von American Association for the Advancement of Science (AAAS)
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  • 10
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    A bacterial virulence protein suppresses host innate immunity to cause plant disease (2006)
    American Association for the Advancement of Science (AAAS)
    Details
    Publikationsdatum: 2006-07-15
    Beschreibung: Plants have evolved a powerful immune system to defend against infection by most microbial organisms. However, successful pathogens, such as Pseudomonas syringae, have developed countermeasures and inject virulence proteins into the host plant cell to suppress immunity and cause devastating diseases. Despite intensive research efforts, the molecular targets of bacterial virulence proteins that are important for plant disease development have remained obscure. Here, we show that a conserved P. syringae virulence protein, HopM1, targets an immunity-associated protein, AtMIN7, in Arabidopsis thaliana. HopM1 mediates the destruction of AtMIN7 via the host proteasome. Our results illustrate a strategy by which a bacterial pathogen exploits the host proteasome to subvert host immunity and causes infection in plants.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Nomura, Kinya -- Debroy, Sruti -- Lee, Yong Hoon -- Pumplin, Nathan -- Jones, Jonathan -- He, Sheng Yang -- New York, N.Y. -- Science. 2006 Jul 14;313(5784):220-3.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Energy Plant Research Laboratory, Michigan State University, East Lansing, MI 48824, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/16840699" target="_blank"〉PubMed〈/a〉
    Schlagwort(e): ADP-Ribosylation Factors/metabolism ; Arabidopsis/*immunology/metabolism/*microbiology ; Arabidopsis Proteins/*metabolism ; Bacterial Proteins/genetics/metabolism ; Brefeldin A/pharmacology ; Glucans/metabolism ; Guanine Nucleotide Exchange Factors/metabolism ; Immunity, Innate ; Mutation ; Plant Diseases/*microbiology ; Plant Leaves/metabolism/microbiology ; Plants, Genetically Modified ; Proteasome Endopeptidase Complex/metabolism ; Protein Transport ; Pseudomonas syringae/genetics/growth & development/*pathogenicity ; Tobacco/metabolism ; Two-Hybrid System Techniques ; Ubiquitins/metabolism ; Virulence Factors/genetics/*metabolism
    Print ISSN: 0036-8075
    Digitale ISSN: 1095-9203
    Thema: Biologie , Chemie und Pharmazie , Informatik , Medizin , Allgemeine Naturwissenschaft , Physik
    Publiziert von American Association for the Advancement of Science (AAAS)
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  • 11
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    Evolutionary history of Salmonella typhi (2006)
    American Association for the Advancement of Science (AAAS)
    Details
    Publikationsdatum: 2006-11-25
    Beschreibung: For microbial pathogens, phylogeographic differentiation seems to be relatively common. However, the neutral population structure of Salmonella enterica serovar Typhi reflects the continued existence of ubiquitous haplotypes over millennia. In contrast, clinical use of fluoroquinolones has yielded at least 15 independent gyrA mutations within a decade and stimulated clonal expansion of haplotype H58 in Asia and Africa. Yet, antibiotic-sensitive strains and haplotypes other than H58 still persist despite selection for antibiotic resistance. Neutral evolution in Typhi appears to reflect the asymptomatic carrier state, and adaptive evolution depends on the rapid transmission of phenotypic changes through acute infections.〈br /〉〈br /〉〈a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC2652035/" target="_blank"〉〈img src="https://static.pubmed.gov/portal/portal3rc.fcgi/4089621/img/3977009" border="0"〉〈/a〉   〈a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC2652035/" target="_blank"〉This paper as free author manuscript - peer-reviewed and accepted for publication〈/a〉〈br /〉〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Roumagnac, Philippe -- Weill, Francois-Xavier -- Dolecek, Christiane -- Baker, Stephen -- Brisse, Sylvain -- Chinh, Nguyen Tran -- Le, Thi Anh Hong -- Acosta, Camilo J -- Farrar, Jeremy -- Dougan, Gordon -- Achtman, Mark -- 076962/Wellcome Trust/United Kingdom -- Wellcome Trust/United Kingdom -- New York, N.Y. -- Science. 2006 Nov 24;314(5803):1301-4.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Max-Planck-Institut fur Infektionsbiologie, Department of Molecular Biology, Chariteplatz 1, 10117 Berlin, Germany.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/17124322" target="_blank"〉PubMed〈/a〉
    Schlagwort(e): Adaptation, Physiological ; Africa ; Alleles ; Anti-Bacterial Agents/pharmacology/therapeutic use ; Asia ; *Biological Evolution ; Carrier State/*microbiology ; DNA Gyrase/genetics ; Drug Resistance, Bacterial ; Drug Resistance, Multiple, Bacterial ; Fluoroquinolones/pharmacology/therapeutic use ; *Genes, Bacterial ; Genetic Variation ; Haplotypes ; Humans ; Molecular Sequence Data ; Mutation ; Polymorphism, Genetic ; Polymorphism, Single Nucleotide ; Salmonella typhi/drug effects/*genetics ; Selection, Genetic ; Typhoid Fever/drug therapy/*microbiology
    Print ISSN: 0036-8075
    Digitale ISSN: 1095-9203
    Thema: Biologie , Chemie und Pharmazie , Informatik , Medizin , Allgemeine Naturwissenschaft , Physik
    Publiziert von American Association for the Advancement of Science (AAAS)
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  • 12
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    The mevalonate pathway controls heart formation in Drosophila by isoprenylation of Ggamma1 (2006)
    American Association for the Advancement of Science (AAAS)
    Details
    Publikationsdatum: 2006-07-22
    Beschreibung: The early morphogenetic mechanisms involved in heart formation are evolutionarily conserved. A screen for genes that control Drosophila heart development revealed a cardiac defect in which pericardial and cardial cells dissociate, which causes loss of cardiac function and embryonic lethality. This phenotype resulted from mutations in the genes encoding HMG-CoA reductase, downstream enzymes in the mevalonate pathway, and G protein Ggamma1, which is geranylgeranylated, thus representing an end point of isoprenoid biosynthesis. Our findings reveal a cardial cell-autonomous requirement of Ggamma1 geranylgeranylation for heart formation and suggest the involvement of the mevalonate pathway in congenital heart disease.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Yi, Peng -- Han, Zhe -- Li, Xiumin -- Olson, Eric N -- New York, N.Y. -- Science. 2006 Sep 1;313(5791):1301-3. Epub 2006 Jul 20.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Molecular Biology, University of Texas Southwestern Medical Center, 6000 Harry Hines Boulevard, Dallas, TX 75390-9148, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/16857902" target="_blank"〉PubMed〈/a〉
    Schlagwort(e): Amino Acid Motifs ; Animals ; Animals, Genetically Modified ; Cell Adhesion ; Drosophila melanogaster/*embryology/genetics/metabolism ; Embryo, Nonmammalian/metabolism ; GTP-Binding Proteins/chemistry/genetics/*metabolism ; Heart/*embryology ; Heart Defects, Congenital/etiology ; Hydroxymethylglutaryl CoA Reductases/genetics/metabolism ; Hydroxymethylglutaryl-CoA Reductase Inhibitors/pharmacology ; Mevalonic Acid/*metabolism ; Models, Animal ; Mutation ; Myocardium/cytology/metabolism ; Pericardium/cytology ; Protein Prenylation ; Transgenes
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    Thema: Biologie , Chemie und Pharmazie , Informatik , Medizin , Allgemeine Naturwissenschaft , Physik
    Publiziert von American Association for the Advancement of Science (AAAS)
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  • 13
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    Tequila, a neurotrypsin ortholog, regulates long-term memory formation in Drosophila (2006)
    American Association for the Advancement of Science (AAAS)
    Details
    Publikationsdatum: 2006-08-12
    Beschreibung: Mutations in the human neurotrypsin gene are associated with autosomal recessive mental retardation. To further understand the pathophysiological consequences of the lack of this serine protease, we studied Tequila (Teq), the Drosophila neurotrypsin ortholog, using associative memory as a behavioral readout. We found that teq inactivation resulted in a long-term memory (LTM)-specific defect. After LTM conditioning of wild-type flies, teq expression transiently increased in the mushroom bodies. Moreover, specific inhibition of teq expression in adult mushroom bodies resulted in a reversible LTM defect. Hence, the Teq pathway is essential for information processing in Drosophila.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Didelot, Gerard -- Molinari, Florence -- Tchenio, Paul -- Comas, Daniel -- Milhiet, Elodie -- Munnich, Arnold -- Colleaux, Laurence -- Preat, Thomas -- New York, N.Y. -- Science. 2006 Aug 11;313(5788):851-3.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Genes et Dynamique des Systemes de Memoire, UMR CNRS 7637, Ecole Superieure de Physique et de Chimie Industrielles, 10 Rue Vauquelin 75005 Paris, France.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/16902143" target="_blank"〉PubMed〈/a〉
    Schlagwort(e): Amino Acid Sequence ; Animals ; Animals, Genetically Modified ; Conditioning, Classical ; Drosophila Proteins/chemistry/genetics/*physiology ; Drosophila melanogaster/genetics/*physiology ; Gene Expression ; Gene Expression Regulation ; Humans ; Learning ; *Memory ; Mifepristone/pharmacology ; Models, Animal ; Molecular Sequence Data ; Mushroom Bodies/anatomy & histology/physiology ; Mutation ; Odors ; RNA Interference ; RNA, Messenger/genetics/metabolism ; Serine Endopeptidases/chemistry/genetics/*physiology
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    Thema: Biologie , Chemie und Pharmazie , Informatik , Medizin , Allgemeine Naturwissenschaft , Physik
    Publiziert von American Association for the Advancement of Science (AAAS)
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  • 14
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    Integration of plant responses to environmentally activated phytohormonal signals (2006)
    American Association for the Advancement of Science (AAAS)
    Details
    Publikationsdatum: 2006-01-10
    Beschreibung: Plants live in fixed locations and survive adversity by integrating growth responses to diverse environmental signals. Here, we show that the nuclear-localized growth-repressing DELLA proteins of Arabidopsis integrate responses to independent hormonal and environmental signals of adverse conditions. The growth restraint conferred by DELLA proteins is beneficial and promotes survival. We propose that DELLAs permit flexible and appropriate modulation of plant growth in response to changes in natural environments.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Achard, Patrick -- Cheng, Hui -- De Grauwe, Liesbeth -- Decat, Jan -- Schoutteten, Hermien -- Moritz, Thomas -- Van Der Straeten, Dominique -- Peng, Jinrong -- Harberd, Nicholas P -- New York, N.Y. -- Science. 2006 Jan 6;311(5757):91-4.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉John Innes Centre, Norwich NR4 7UJ, UK.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/16400150" target="_blank"〉PubMed〈/a〉
    Schlagwort(e): Abscisic Acid/metabolism/pharmacology ; Arabidopsis/genetics/*growth & development/metabolism ; Arabidopsis Proteins/genetics/metabolism/*physiology ; Ethylenes/metabolism ; Flowers/growth & development ; Genes, Plant ; Gibberellins/metabolism/pharmacology ; Mutation ; Nuclear Proteins/metabolism ; Plant Growth Regulators/*metabolism/pharmacology ; Plant Proteins/genetics/physiology ; Plant Roots/growth & development ; *Signal Transduction ; Sodium Chloride/*pharmacology ; Transcription Factors/genetics/metabolism/physiology ; Transcription, Genetic
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    Thema: Biologie , Chemie und Pharmazie , Informatik , Medizin , Allgemeine Naturwissenschaft , Physik
    Publiziert von American Association for the Advancement of Science (AAAS)
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  • 15
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    Biochemistry. Proteins in a small world (2006)
    American Association for the Advancement of Science (AAAS)
    Details
    Publikationsdatum: 2006-12-23
    Beschreibung: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Yeates, Todd O -- Beeby, Morgan -- New York, N.Y. -- Science. 2006 Dec 22;314(5807):1882-3.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Chemistry and Biochemistry, University of California Los Angeles, Los Angeles, CA90024-1569, USA. yeates@mbi.ucla.edu〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/17185587" target="_blank"〉PubMed〈/a〉
    Schlagwort(e): Binding Sites ; Evolution, Molecular ; Gene Duplication ; Gene Transfer, Horizontal ; *Metabolic Networks and Pathways ; Mutation ; Protein Binding ; *Protein Interaction Mapping ; Proteins/*chemistry/genetics/*metabolism ; Saccharomyces cerevisiae Proteins/chemistry/metabolism
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    Thema: Biologie , Chemie und Pharmazie , Informatik , Medizin , Allgemeine Naturwissenschaft , Physik
    Publiziert von American Association for the Advancement of Science (AAAS)
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  • 16
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    Losartan, an AT1 antagonist, prevents aortic aneurysm in a mouse model of Marfan syndrome (2006)
    American Association for the Advancement of Science (AAAS)
    Details
    Publikationsdatum: 2006-04-08
    Beschreibung: Aortic aneurysm and dissection are manifestations of Marfan syndrome (MFS), a disorder caused by mutations in the gene that encodes fibrillin-1. Selected manifestations of MFS reflect excessive signaling by the transforming growth factor-beta (TGF-beta) family of cytokines. We show that aortic aneurysm in a mouse model of MFS is associated with increased TGF-beta signaling and can be prevented by TGF-beta antagonists such as TGF-beta-neutralizing antibody or the angiotensin II type 1 receptor (AT1) blocker, losartan. AT1 antagonism also partially reversed noncardiovascular manifestations of MFS, including impaired alveolar septation. These data suggest that losartan, a drug already in clinical use for hypertension, merits investigation as a therapeutic strategy for patients with MFS and has the potential to prevent the major life-threatening manifestation of this disorder.〈br /〉〈br /〉〈a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC1482474/" target="_blank"〉〈img src="https://static.pubmed.gov/portal/portal3rc.fcgi/4089621/img/3977009" border="0"〉〈/a〉   〈a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC1482474/" target="_blank"〉This paper as free author manuscript - peer-reviewed and accepted for publication〈/a〉〈br /〉〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Habashi, Jennifer P -- Judge, Daniel P -- Holm, Tammy M -- Cohn, Ronald D -- Loeys, Bart L -- Cooper, Timothy K -- Myers, Loretha -- Klein, Erin C -- Liu, Guosheng -- Calvi, Carla -- Podowski, Megan -- Neptune, Enid R -- Halushka, Marc K -- Bedja, Djahida -- Gabrielson, Kathleen -- Rifkin, Daniel B -- Carta, Luca -- Ramirez, Francesco -- Huso, David L -- Dietz, Harry C -- K08 HL067056/HL/NHLBI NIH HHS/ -- New York, N.Y. -- Science. 2006 Apr 7;312(5770):117-21.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Howard Hughes Medical Institute and Department of Pediatrics, Johns Hopkins University School of Medicine, Baltimore, MD 21205, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/16601194" target="_blank"〉PubMed〈/a〉
    Schlagwort(e): Adrenergic beta-Antagonists/administration & dosage/therapeutic use ; Angiotensin II Type 1 Receptor Blockers/administration & dosage/*therapeutic use ; Animals ; Antibodies/immunology ; Aorta/pathology ; Aortic Aneurysm/etiology/*prevention & control ; *Disease Models, Animal ; Elastic Tissue/pathology ; Female ; Losartan/administration & dosage/*therapeutic use ; Lung/pathology ; Lung Diseases/drug therapy/pathology ; Marfan Syndrome/complications/*drug therapy/metabolism/pathology ; Mice ; Microfilament Proteins/genetics ; Mutation ; Neutralization Tests ; Pregnancy ; Pregnancy Complications/drug therapy ; Propranolol/administration & dosage/therapeutic use ; Pulmonary Alveoli/pathology ; Receptor, Angiotensin, Type 1/metabolism ; Signal Transduction ; Transforming Growth Factor beta/antagonists & inhibitors/immunology/*metabolism
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    Thema: Biologie , Chemie und Pharmazie , Informatik , Medizin , Allgemeine Naturwissenschaft , Physik
    Publiziert von American Association for the Advancement of Science (AAAS)
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  • 17
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    Neuroscience. Neuron, know thy neighbor (2006)
    American Association for the Advancement of Science (AAAS)
    Details
    Publikationsdatum: 2006-03-18
    Beschreibung: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉DiCicco-Bloom, Emanuel -- New York, N.Y. -- Science. 2006 Mar 17;311(5767):1560-2.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Neuroscience and Cell Biology/Pediatrics (Neurology), University of Medicine and Dentistry of New Jersey-Robert Wood Johnson Medical School, Piscataway, NJ 08854, USA. diciccem@umdnj.edu〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/16543446" target="_blank"〉PubMed〈/a〉
    Schlagwort(e): Adherens Junctions/*physiology/ultrastructure ; Animals ; Brain/cytology/*embryology ; *Cell Adhesion ; Cell Count ; Cell Death ; Cell Differentiation ; Cell Movement ; Cell Proliferation ; Central Nervous System/cytology/embryology ; Cytoskeleton/physiology ; Hedgehog Proteins ; Hyperplasia ; Mice ; Mutation ; Neurons/cytology/*physiology ; Signal Transduction ; Stem Cells/cytology/physiology ; Trans-Activators/*metabolism ; alpha Catenin/genetics/*physiology
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    Thema: Biologie , Chemie und Pharmazie , Informatik , Medizin , Allgemeine Naturwissenschaft , Physik
    Publiziert von American Association for the Advancement of Science (AAAS)
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  • 18
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    Origins of HIV and the evolution of resistance to AIDS (2006)
    American Association for the Advancement of Science (AAAS)
    Details
    Publikationsdatum: 2006-07-29
    Beschreibung: The cross-species transmission of lentiviruses from African primates to humans has selected viral adaptations which have subsequently facilitated human-to-human transmission. HIV adapts not only by positive selection through mutation but also by recombination of segments of its genome in individuals who become multiply infected. Naturally infected nonhuman primates are relatively resistant to AIDS-like disease despite high plasma viral loads and sustained viral evolution. Further understanding of host resistance factors and the mechanisms of disease in natural primate hosts may provide insight into unexplored therapeutic avenues for the prevention of AIDS.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Heeney, Jonathan L -- Dalgleish, Angus G -- Weiss, Robin A -- G8712499/Medical Research Council/United Kingdom -- P01 A148225-01A2/PHS HHS/ -- New York, N.Y. -- Science. 2006 Jul 28;313(5786):462-6.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Virology, Biomedical Primate Research Centre, Rijswijk 2280 GH, Netherlands. heeney@bprc.nl〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/16873637" target="_blank"〉PubMed〈/a〉
    Schlagwort(e): Acquired Immunodeficiency Syndrome/*immunology/transmission/*virology ; Africa ; Animals ; Disease Progression ; Disease Reservoirs ; *Evolution, Molecular ; HIV Infections/immunology/transmission/virology ; HIV-1/classification/*genetics/physiology ; HIV-2/genetics ; HLA Antigens/genetics/immunology ; Humans ; *Immunity, Innate ; Mutation ; Pan troglodytes/virology ; Primates/virology ; Recombination, Genetic ; Selection, Genetic ; Simian Acquired Immunodeficiency Syndrome/transmission/virology ; Simian Immunodeficiency Virus/genetics
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    Thema: Biologie , Chemie und Pharmazie , Informatik , Medizin , Allgemeine Naturwissenschaft , Physik
    Publiziert von American Association for the Advancement of Science (AAAS)
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  • 19
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    A bacterial protein enhances the release and efficacy of liposomal cancer drugs (2006)
    American Association for the Advancement of Science (AAAS)
    Details
    Publikationsdatum: 2006-11-25
    Beschreibung: Clostridium novyi-NT is an anaerobic bacterium that can infect hypoxic regions within experimental tumors. Because C. novyi-NT lyses red blood cells, we hypothesized that its membrane-disrupting properties could be exploited to enhance the release of liposome-encapsulated drugs within tumors. Here, we show that treatment of mice bearing large, established tumors with C. novyi-NT plus a single dose of liposomal doxorubicin often led to eradication of the tumors. The bacterial factor responsible for the enhanced drug release was identified as a previously unrecognized protein termed liposomase. This protein could potentially be incorporated into diverse experimental approaches for the specific delivery of chemotherapeutic agents to tumors.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Cheong, Ian -- Huang, Xin -- Bettegowda, Chetan -- Diaz, Luis A Jr -- Kinzler, Kenneth W -- Zhou, Shibin -- Vogelstein, Bert -- CA062924/CA/NCI NIH HHS/ -- New York, N.Y. -- Science. 2006 Nov 24;314(5803):1308-11.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Howard Hughes Medical Institute and the Ludwig Center for Cancer Genetics and Therapeutics, Johns Hopkins Kimmel Comprehensive Cancer Center, Baltimore, MD 21231, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/17124324" target="_blank"〉PubMed〈/a〉
    Schlagwort(e): Amino Acid Sequence ; Animals ; Antineoplastic Agents/*administration & dosage/pharmacokinetics/therapeutic use ; Bacterial Proteins/chemistry/genetics/*metabolism ; Base Sequence ; Camptothecin/administration & dosage/analogs & ; derivatives/pharmacokinetics/therapeutic use ; Cell Line, Tumor ; Cloning, Molecular ; Clostridium/*chemistry/genetics ; Colorectal Neoplasms/*drug therapy ; Doxorubicin/*administration & dosage/pharmacokinetics/therapeutic use ; Drug Carriers ; Humans ; Lipase/chemistry/genetics/*metabolism ; Lipid Bilayers/chemistry ; Liposomes/chemistry/*metabolism ; Mice ; Molecular Sequence Data ; Mutation ; Neoplasm Transplantation ; Protein Structure, Tertiary
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    Thema: Biologie , Chemie und Pharmazie , Informatik , Medizin , Allgemeine Naturwissenschaft , Physik
    Publiziert von American Association for the Advancement of Science (AAAS)
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  • 20
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    Large-scale sequence analysis of avian influenza isolates (2006)
    American Association for the Advancement of Science (AAAS)
    Details
    Publikationsdatum: 2006-01-28
    Beschreibung: The spread of H5N1 avian influenza viruses (AIVs) from China to Europe has raised global concern about their potential to infect humans and cause a pandemic. In spite of their substantial threat to human health, remarkably little AIV whole-genome information is available. We report here a preliminary analysis of the first large-scale sequencing of AIVs, including 2196 AIV genes and 169 complete genomes. We combine this new information with public AIV data to identify new gene alleles, persistent genotypes, compensatory mutations, and a potential virulence determinant.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Obenauer, John C -- Denson, Jackie -- Mehta, Perdeep K -- Su, Xiaoping -- Mukatira, Suraj -- Finkelstein, David B -- Xu, Xiequn -- Wang, Jinhua -- Ma, Jing -- Fan, Yiping -- Rakestraw, Karen M -- Webster, Robert G -- Hoffmann, Erich -- Krauss, Scott -- Zheng, Jie -- Zhang, Ziwei -- Naeve, Clayton W -- AI95357/AI/NIAID NIH HHS/ -- CA 21765/CA/NCI NIH HHS/ -- R01 GM061739/GM/NIGMS NIH HHS/ -- R01 GM069916/GM/NIGMS NIH HHS/ -- New York, N.Y. -- Science. 2006 Mar 17;311(5767):1576-80. Epub 2006 Jan 26.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Hartwell Center for Bioinformatics and Biotechnology, St. Jude Children's Research Hospital, Memphis, TN 38105, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/16439620" target="_blank"〉PubMed〈/a〉
    Schlagwort(e): Animals ; Birds/virology ; Computational Biology ; *Genes, Viral ; Genome, Viral ; Humans ; Influenza A Virus, H1N1 Subtype/genetics ; Influenza A Virus, H2N2 Subtype/genetics ; Influenza A Virus, H3N2 Subtype/genetics ; Influenza A Virus, H3N8 Subtype/genetics ; Influenza A Virus, H5N1 Subtype/chemistry/*genetics/pathogenicity ; Influenza A Virus, H5N2 Subtype/genetics ; Influenza A Virus, H7N7 Subtype/genetics ; Influenza A Virus, H9N2 Subtype/genetics ; Influenza A virus/chemistry/*genetics/isolation & purification/pathogenicity ; Influenza in Birds/virology ; Influenza, Human/virology ; Molecular Sequence Data ; Mutation ; Phylogeny ; RNA, Viral/genetics ; Reassortant Viruses/genetics ; Sequence Analysis, DNA ; Viral Nonstructural Proteins/*chemistry/genetics ; Viral Proteins/chemistry/genetics ; Virulence Factors/*chemistry/genetics
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    Thema: Biologie , Chemie und Pharmazie , Informatik , Medizin , Allgemeine Naturwissenschaft , Physik
    Publiziert von American Association for the Advancement of Science (AAAS)
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  • 21
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    ATM engages autodegradation of the E3 ubiquitin ligase COP1 after DNA damage (2006)
    American Association for the Advancement of Science (AAAS)
    Details
    Publikationsdatum: 2006-08-26
    Beschreibung: The ataxia telangiectasia mutated (ATM) protein kinase is a critical component of a DNA-damage response network configured to maintain genomic integrity. The abundance of an essential downstream effecter of this pathway, the tumor suppressor protein p53, is tightly regulated by controlled degradation through COP1 and other E3 ubiquitin ligases, such as MDM2 and Pirh2; however, the signal transduction pathway that regulates the COP1-p53 axis following DNA damage remains enigmatic. We observed that in response to DNA damage, ATM phosphorylated COP1 on Ser(387) and stimulated a rapid autodegradation mechanism. Ionizing radiation triggered an ATM-dependent movement of COP1 from the nucleus to the cytoplasm, and ATM-dependent phosphorylation of COP1 on Ser(387) was both necessary and sufficient to disrupt the COP1-p53 complex and subsequently to abrogate the ubiquitination and degradation of p53. Furthermore, phosphorylation of COP1 on Ser(387) was required to permit p53 to become stabilized and to exert its tumor suppressor properties in response to DNA damage.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Dornan, David -- Shimizu, Harumi -- Mah, Angie -- Dudhela, Tanay -- Eby, Michael -- O'rourke, Karen -- Seshagiri, Somasekar -- Dixit, Vishva M -- New York, N.Y. -- Science. 2006 Aug 25;313(5790):1122-6.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Physiological Chemistry, Genentech, Inc., 1 DNA Way, South San Francisco, CA 94080, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/16931761" target="_blank"〉PubMed〈/a〉
    Schlagwort(e): Ataxia Telangiectasia Mutated Proteins ; Cell Cycle Proteins/genetics/*metabolism ; Cell Line ; Cell Line, Tumor ; Cell Nucleus/metabolism ; Cytoplasm/metabolism ; *DNA Damage ; DNA-Binding Proteins/genetics/*metabolism ; Escherichia coli/genetics/metabolism ; Etoposide/pharmacology ; Humans ; Mutation ; Nuclear Proteins/genetics/*metabolism ; Phosphorylation ; Phosphoserine/metabolism ; Proteasome Endopeptidase Complex/metabolism ; Protein-Serine-Threonine Kinases/genetics/*metabolism ; RNA, Small Interfering ; Radiation, Ionizing ; Recombinant Fusion Proteins/metabolism ; Transfection ; Tumor Suppressor Protein p53/genetics/metabolism ; Tumor Suppressor Proteins/genetics/*metabolism ; Ubiquitin/metabolism ; Ubiquitin-Protein Ligases/genetics/*metabolism
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    Thema: Biologie , Chemie und Pharmazie , Informatik , Medizin , Allgemeine Naturwissenschaft , Physik
    Publiziert von American Association for the Advancement of Science (AAAS)
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  • 22
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    Electric fields at the active site of an enzyme: direct comparison of experiment with theory (2006)
    American Association for the Advancement of Science (AAAS)
    Details
    Publikationsdatum: 2006-07-15
    Beschreibung: The electric fields produced in folded proteins influence nearly every aspect of protein function. We present a vibrational spectroscopy technique that measures changes in electric field at a specific site of a protein as shifts in frequency (Stark shifts) of a calibrated nitrile vibration. A nitrile-containing inhibitor is used to deliver a unique probe vibration to the active site of human aldose reductase, and the response of the nitrile stretch frequency is measured for a series of mutations in the enzyme active site. These shifts yield quantitative information on electric fields that can be directly compared with electrostatics calculations. We show that extensive molecular dynamics simulations and ensemble averaging are required to reproduce the observed changes in field.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Suydam, Ian T -- Snow, Christopher D -- Pande, Vijay S -- Boxer, Steven G -- New York, N.Y. -- Science. 2006 Jul 14;313(5784):200-4.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Chemistry, Stanford University, Stanford, CA 94305-5080, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/16840693" target="_blank"〉PubMed〈/a〉
    Schlagwort(e): Aldehyde Reductase/antagonists & inhibitors/*chemistry/genetics/metabolism ; Binding Sites ; Circular Dichroism ; Computer Simulation ; *Electricity ; Enzyme Inhibitors/metabolism/pharmacology ; Humans ; Models, Molecular ; Mutation ; Nitriles/metabolism/pharmacology ; Protein Conformation ; Protein Folding ; Protein Structure, Tertiary ; Spectrophotometry, Infrared ; Spectrum Analysis ; Static Electricity
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    Thema: Biologie , Chemie und Pharmazie , Informatik , Medizin , Allgemeine Naturwissenschaft , Physik
    Publiziert von American Association for the Advancement of Science (AAAS)
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  • 23
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    How and when was wild wheat domesticated? (2006)
    American Association for the Advancement of Science (AAAS)
    Details
    Publikationsdatum: 2006-07-27
    Beschreibung: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Hartmann, Anat -- Kislev, Mordechai E -- Weiss, Ehud -- New York, N.Y. -- Science. 2006 Jul 21;313(5785):296; author reply 296-7.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/16869032" target="_blank"〉PubMed〈/a〉
    Schlagwort(e): Agriculture/*history ; Archaeology ; Crops, Agricultural/genetics/growth & development/*history ; Edible Grain/genetics/growth & development/history ; History, Ancient ; Hordeum/genetics/growth & development/history ; Mutation ; Time ; Triticum/genetics/growth & development/*history
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    Thema: Biologie , Chemie und Pharmazie , Informatik , Medizin , Allgemeine Naturwissenschaft , Physik
    Publiziert von American Association for the Advancement of Science (AAAS)
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  • 24
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    Checkpoint proteins control survival of the postmitotic cells in Caenorhabditis elegans (2006)
    American Association for the Advancement of Science (AAAS)
    Details
    Publikationsdatum: 2006-06-03
    Beschreibung: Checkpoints are evolutionarily conserved signaling mechanisms that arrest cell division and alter cellular stress resistance in response to DNA damage or stalled replication forks. To study the consequences of loss of checkpoint functions in whole animals, checkpoint genes were inactivated in the nematode C. elegans. We show that checkpoint proteins are not only essential for normal development but also determine adult somatic maintenance. Checkpoint proteins play a role in the survival of postmitotic adult cells.〈br /〉〈br /〉〈a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC2568993/" target="_blank"〉〈img src="https://static.pubmed.gov/portal/portal3rc.fcgi/4089621/img/3977009" border="0"〉〈/a〉   〈a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC2568993/" target="_blank"〉This paper as free author manuscript - peer-reviewed and accepted for publication〈/a〉〈br /〉〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Olsen, Anders -- Vantipalli, Maithili C -- Lithgow, Gordon J -- AG21069/AG/NIA NIH HHS/ -- AG22868/AG/NIA NIH HHS/ -- NS050789-01/NS/NINDS NIH HHS/ -- R01 AG021069/AG/NIA NIH HHS/ -- R01 AG021069-04/AG/NIA NIH HHS/ -- R01 AG022868/AG/NIA NIH HHS/ -- R01 AG022868-04/AG/NIA NIH HHS/ -- New York, N.Y. -- Science. 2006 Jun 2;312(5778):1381-5.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Buck Institute, 8001 Redwood Boulevard, Novato, CA 94945, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/16741121" target="_blank"〉PubMed〈/a〉
    Schlagwort(e): Adaptation, Physiological/genetics/physiology ; Animals ; Caenorhabditis elegans/cytology/growth & development/*physiology ; Caenorhabditis elegans Proteins/genetics/*physiology ; Cell Cycle Proteins/genetics/*physiology ; Cell Survival ; Heat-Shock Proteins/biosynthesis/genetics ; Mitosis/genetics/*physiology ; Mutation ; Protein Kinases/metabolism ; Schizosaccharomyces pombe Proteins ; Signal Transduction ; Stem Cells/cytology
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    Thema: Biologie , Chemie und Pharmazie , Informatik , Medizin , Allgemeine Naturwissenschaft , Physik
    Publiziert von American Association for the Advancement of Science (AAAS)
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  • 25
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    Clonal adaptive radiation in a constant environment (2006)
    American Association for the Advancement of Science (AAAS)
    Details
    Publikationsdatum: 2006-07-11
    Beschreibung: The evolution of new combinations of bacterial properties contributes to biodiversity and the emergence of new diseases. We investigated the capacity for bacterial divergence with a chemostat culture of Escherichia coli. A clonal population radiated into more than five phenotypic clusters within 26 days, with multiple variations in global regulation, metabolic strategies, surface properties, and nutrient permeability pathways. Most isolates belonged to a single ecotype, and neither periodic selection events nor ecological competition for a single niche prevented an adaptive radiation with a single resource. The multidirectional exploration of fitness space is an underestimated ingredient to bacterial success even in unstructured environments.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Maharjan, Ram -- Seeto, Shona -- Notley-McRobb, Lucinda -- Ferenci, Thomas -- New York, N.Y. -- Science. 2006 Jul 28;313(5786):514-7. Epub 2006 Jul 6.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉School of Molecular and Microbial Biosciences, University of Sydney, Sydney, New South Wales 2006, Australia.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/16825532" target="_blank"〉PubMed〈/a〉
    Schlagwort(e): Adaptation, Physiological ; *Biological Evolution ; Cell Membrane Permeability ; Culture Media ; *Ecosystem ; Environment ; Escherichia coli/classification/*genetics/growth & development/*physiology ; Gene Expression Regulation, Bacterial ; *Genetic Variation ; Genotype ; Glucose/metabolism ; Mutation ; Phenotype ; Phylogeny ; Selection, Genetic ; Surface Properties
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    Thema: Biologie , Chemie und Pharmazie , Informatik , Medizin , Allgemeine Naturwissenschaft , Physik
    Publiziert von American Association for the Advancement of Science (AAAS)
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  • 26
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    How fast was wild wheat domesticated? (2006)
    American Association for the Advancement of Science (AAAS)
    Details
    Publikationsdatum: 2006-04-01
    Beschreibung: Prehistoric cultivation of wild wheat in the Fertile Crescent led to the selection of mutants with indehiscent (nonshattering) ears, which evolved into modern domestic wheat. Previous estimates suggested that this transformation was rapid, but our analyses of archaeological plant remains demonstrate that indehiscent domesticates were slow to appear, emerging approximately 9500 years before the present, and that dehiscent (shattering) forms were still common in cultivated fields approximately 7500 years before the present. Slow domestication implies that after cultivation began, wild cereals may have remained unchanged for a long period, supporting claims that agriculture originated in the Near East approximately 10,500 years before the present.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Tanno, Ken-Ichi -- Willcox, George -- New York, N.Y. -- Science. 2006 Mar 31;311(5769):1886.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Research Institute for Humanity and Nature, Takashima 335, Kamigyo, 602-0878 Kyoto, Japan.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/16574859" target="_blank"〉PubMed〈/a〉
    Schlagwort(e): Agriculture/*history ; *Archaeology ; Crops, Agricultural/genetics/growth & development/*history ; History, Ancient ; Mutation ; Time ; Triticum/genetics/growth & development/*history ; Turkey
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    Thema: Biologie , Chemie und Pharmazie , Informatik , Medizin , Allgemeine Naturwissenschaft , Physik
    Publiziert von American Association for the Advancement of Science (AAAS)
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  • 27
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    Gene transposition as a cause of hybrid sterility in Drosophila (2006)
    American Association for the Advancement of Science (AAAS)
    Details
    Publikationsdatum: 2006-09-09
    Beschreibung: We describe reproductive isolation caused by a gene transposition. In certain Drosophila melanogaster-D. simulans hybrids, hybrid male sterility is caused by the lack of a single-copy gene essential for male fertility, JYAlpha. This gene is located on the fourth chromosome of D. melanogaster but on the third chromosome of D. simulans. Genomic and molecular analyses show that JYAlpha transposed to the third chromosome during the evolutionary history of the D. simulans lineage. Because of this transposition, a fraction of hybrids completely lack JYAlpha and are sterile, representing reproductive isolation without sequence evolution.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Masly, John P -- Jones, Corbin D -- Noor, Mohamed A F -- Locke, John -- Orr, H Allen -- New York, N.Y. -- Science. 2006 Sep 8;313(5792):1448-50.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Biology, University of Rochester, Rochester, NY 14627, USA. msly@mail.rochester.edu〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/16960009" target="_blank"〉PubMed〈/a〉
    Schlagwort(e): Animals ; Chromosome Mapping ; Chromosomes/*genetics ; Drosophila/enzymology/*genetics/physiology ; Drosophila melanogaster/enzymology/*genetics/physiology ; Evolution, Molecular ; Female ; Fertility/genetics ; Gene Dosage ; *Genes, Insect ; *Hybridization, Genetic ; Male ; Mutation ; *Recombination, Genetic ; Reproduction/genetics ; Sodium-Potassium-Exchanging ATPase/*genetics ; Sperm Motility
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    Thema: Biologie , Chemie und Pharmazie , Informatik , Medizin , Allgemeine Naturwissenschaft , Physik
    Publiziert von American Association for the Advancement of Science (AAAS)
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  • 28
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    Hoxa2- and rhombomere-dependent development of the mouse facial somatosensory map (2006)
    American Association for the Advancement of Science (AAAS)
    Details
    Publikationsdatum: 2006-08-12
    Beschreibung: In the mouse trigeminal pathway, sensory inputs from distinct facial structures, such as whiskers or lower jaw and lip, are topographically mapped onto the somatosensory cortex through relay stations in the thalamus and hindbrain. In the developing hindbrain, the mechanisms generating such maps remain elusive. We found that in the principal sensory nucleus, the whisker-related map is contributed by rhombomere 3-derived neurons, whereas the rhombomere 2-derived progeny supply the lower jaw and lip representation. Moreover, early Hoxa2 expression in neuroepithelium prevents the trigeminal nerve from ectopically projecting to the cerebellum, whereas late expression in the principal sensory nucleus promotes selective arborization of whisker-related afferents and topographic connectivity to the thalamus. Hoxa2 inactivation further results in the absence of whisker-related maps in the postnatal brain. Thus, Hoxa2- and rhombomere 3-dependent cues determine the whisker area map and are required for the assembly of the whisker-to-barrel somatosensory circuit.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Oury, Franck -- Murakami, Yasunori -- Renaud, Jean-Sebastien -- Pasqualetti, Massimo -- Charnay, Patrick -- Ren, Shu-Yue -- Rijli, Filippo M -- New York, N.Y. -- Science. 2006 Sep 8;313(5792):1408-13. Epub 2006 Aug 10.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Institut de Genetique et de Biologie Moleculaire et Cellulaire, CNRS/INSERM/Universite Louis Pasteur, UMR 7104, BP 10142, Communaute Urbaine de Strasbourg, 67404 Illkirch Cedex, France.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/16902088" target="_blank"〉PubMed〈/a〉
    Schlagwort(e): Afferent Pathways ; Animals ; Axons/ultrastructure ; Face/innervation ; Homeodomain Proteins/genetics/*physiology ; Lip/innervation ; Mandible/embryology/innervation ; Mice ; Mice, Transgenic ; Mutation ; Neurons, Afferent/cytology ; Receptor, EphA4/metabolism ; Receptor, EphA7/metabolism ; Rhombencephalon/cytology/*embryology/metabolism ; Somatosensory Cortex/*anatomy & histology/embryology ; Thalamus/embryology/metabolism ; Trigeminal Ganglion/embryology/metabolism ; Trigeminal Nerve/*embryology/physiology ; Ventral Thalamic Nuclei/embryology ; Vibrissae/*innervation
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    Thema: Biologie , Chemie und Pharmazie , Informatik , Medizin , Allgemeine Naturwissenschaft , Physik
    Publiziert von American Association for the Advancement of Science (AAAS)
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  • 29
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    p53 regulates mitochondrial respiration (2006)
    American Association for the Advancement of Science (AAAS)
    Details
    Publikationsdatum: 2006-05-27
    Beschreibung: The energy that sustains cancer cells is derived preferentially from glycolysis. This metabolic change, the Warburg effect, was one of the first alterations in cancer cells recognized as conferring a survival advantage. Here, we show that p53, one of the most frequently mutated genes in cancers, modulates the balance between the utilization of respiratory and glycolytic pathways. We identify Synthesis of Cytochrome c Oxidase 2 (SCO2) as the downstream mediator of this effect in mice and human cancer cell lines. SCO2 is critical for regulating the cytochrome c oxidase (COX) complex, the major site of oxygen utilization in the eukaryotic cell. Disruption of the SCO2 gene in human cancer cells with wild-type p53 recapitulated the metabolic switch toward glycolysis that is exhibited by p53-deficient cells. That SCO2 couples p53 to mitochondrial respiration provides a possible explanation for the Warburg effect and offers new clues as to how p53 might affect aging and metabolism.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Matoba, Satoaki -- Kang, Ju-Gyeong -- Patino, Willmar D -- Wragg, Andrew -- Boehm, Manfred -- Gavrilova, Oksana -- Hurley, Paula J -- Bunz, Fred -- Hwang, Paul M -- Intramural NIH HHS/ -- New York, N.Y. -- Science. 2006 Jun 16;312(5780):1650-3. Epub 2006 May 25.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Cardiology Branch, National Heart, Lung, and Blood Institute, National Institutes of Health, Bethesda, MD 20892, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/16728594" target="_blank"〉PubMed〈/a〉
    Schlagwort(e): Adenosine Triphosphate/metabolism ; Animals ; Carrier Proteins ; Cell Line, Tumor ; *Cell Respiration ; Cell Survival ; Electron Transport Complex IV/*genetics/metabolism/physiology ; Gene Expression Regulation, Neoplastic ; *Genes, p53 ; Glycolysis ; Humans ; Membrane Proteins/genetics/metabolism ; Mice ; Mice, Inbred C57BL ; Mitochondria/*metabolism ; Mitochondria, Liver/*metabolism ; Mitochondrial Proteins ; Mutation ; Oxygen Consumption ; Proteins/*genetics/physiology ; RNA, Small Interfering ; Recombination, Genetic ; Transcription, Genetic ; Transcriptional Activation ; Tumor Suppressor Protein p53/*physiology
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    Thema: Biologie , Chemie und Pharmazie , Informatik , Medizin , Allgemeine Naturwissenschaft , Physik
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  • 30
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    The nucleosomal surface as a docking station for Kaposi's sarcoma herpesvirus LANA (2006)
    American Association for the Advancement of Science (AAAS)
    Details
    Publikationsdatum: 2006-02-14
    Beschreibung: Kaposi's sarcoma-associated herpesvirus (KSHV) latency-associated nuclear antigen (LANA) mediates viral genome attachment to mitotic chromosomes. We find that N-terminal LANA docks onto chromosomes by binding nucleosomes through the folded region of histones H2A-H2B. The same LANA residues were required for both H2A-H2B binding and chromosome association. Further, LANA did not bind Xenopus sperm chromatin, which is deficient in H2A-H2B; chromatin binding was rescued after assembly of nucleosomes containing H2A-H2B. We also describe the 2.9-angstrom crystal structure of a nucleosome complexed with the first 23 LANA amino acids. The LANA peptide forms a hairpin that interacts exclusively with an acidic H2A-H2B region that is implicated in the formation of higher order chromatin structure. Our findings present a paradigm for how nucleosomes may serve as binding platforms for viral and cellular proteins and reveal a previously unknown mechanism for KSHV latency.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Barbera, Andrew J -- Chodaparambil, Jayanth V -- Kelley-Clarke, Brenna -- Joukov, Vladimir -- Walter, Johannes C -- Luger, Karolin -- Kaye, Kenneth M -- CA82036/CA/NCI NIH HHS/ -- GM067777/GM/NIGMS NIH HHS/ -- GM62267/GM/NIGMS NIH HHS/ -- R01 GM067777/GM/NIGMS NIH HHS/ -- New York, N.Y. -- Science. 2006 Feb 10;311(5762):856-61.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Channing Laboratory, Department of Medicine, Brigham and Women's Hospital, Harvard Medical School, Boston, MA 02115, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/16469929" target="_blank"〉PubMed〈/a〉
    Schlagwort(e): Amino Acid Substitution ; Animals ; Antigens, Viral/*chemistry/*metabolism ; Cell Line, Tumor ; Chromatin/metabolism ; Chromosomes/metabolism ; Chromosomes, Human/metabolism ; Chromosomes, Mammalian/metabolism ; Crystallography, X-Ray ; Dimerization ; Herpesvirus 8, Human/chemistry/*metabolism ; Histones/chemistry/*metabolism ; Humans ; Models, Molecular ; Mutation ; Nuclear Proteins/*chemistry/*metabolism ; Nucleosomes/*chemistry/*metabolism ; Protein Binding ; Protein Conformation ; Protein Folding ; Protein Structure, Tertiary ; Recombinant Fusion Proteins/metabolism ; Xenopus laevis
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    Thema: Biologie , Chemie und Pharmazie , Informatik , Medizin , Allgemeine Naturwissenschaft , Physik
    Publiziert von American Association for the Advancement of Science (AAAS)
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  • 31
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    Large punctuational contribution of speciation to evolutionary divergence at the molecular level (2006)
    American Association for the Advancement of Science (AAAS)
    Details
    Publikationsdatum: 2006-10-07
    Beschreibung: A long-standing debate in evolutionary biology concerns whether species diverge gradually through time or by punctuational episodes at the time of speciation. We found that approximately 22% of substitutional changes at the DNA level can be attributed to punctuational evolution, and the remainder accumulates from background gradual divergence. Punctuational effects occur at more than twice the rate in plants and fungi than in animals, but the proportion of total divergence attributable to punctuational change does not vary among these groups. Punctuational changes cause departures from a clock-like tempo of evolution, suggesting that they should be accounted for in deriving dates from phylogenies. Punctuational episodes of evolution may play a larger role in promoting evolutionary divergence than has previously been appreciated.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Pagel, Mark -- Venditti, Chris -- Meade, Andrew -- New York, N.Y. -- Science. 2006 Oct 6;314(5796):119-21.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉School of Biological Sciences, University of Reading, Whiteknights, Reading RG6 6AJ, UK. m.pagel@rdg.ac.uk〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/17023657" target="_blank"〉PubMed〈/a〉
    Schlagwort(e): Animals ; Base Sequence ; Bayes Theorem ; DNA/*genetics ; DNA, Fungal/genetics ; DNA, Plant/genetics ; *Evolution, Molecular ; Founder Effect ; Fungi/classification/genetics ; *Genetic Speciation ; Genetic Variation ; Likelihood Functions ; Mathematics ; Models, Statistical ; Mutation ; Phylogeny ; Plants/classification/genetics ; Sequence Alignment
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    Thema: Biologie , Chemie und Pharmazie , Informatik , Medizin , Allgemeine Naturwissenschaft , Physik
    Publiziert von American Association for the Advancement of Science (AAAS)
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    An architectural framework that may lie at the core of the postsynaptic density (2006)
    American Association for the Advancement of Science (AAAS)
    Details
    Publikationsdatum: 2006-01-28
    Beschreibung: The postsynaptic density (PSD) is a complex assembly of proteins associated with the postsynaptic membrane that organizes neurotransmitter receptors, signaling pathways, and regulatory elements within a cytoskeletal matrix. Here we show that the sterile alpha motif domain of rat Shank3/ProSAP2, a master scaffolding protein located deep within the PSD, can form large sheets composed of helical fibers stacked side by side. Zn2+, which is found in high concentrations in the PSD, binds tightly to Shank3 and may regulate assembly. Sheets of the Shank protein could form a platform for the construction of the PSD complex.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Baron, Marisa K -- Boeckers, Tobias M -- Vaida, Bianca -- Faham, Salem -- Gingery, Mari -- Sawaya, Michael R -- Salyer, Danielle -- Gundelfinger, Eckart D -- Bowie, James U -- R01 CA081000/CA/NCI NIH HHS/ -- R01 GM063919/GM/NIGMS NIH HHS/ -- R01 GM063919-07/GM/NIGMS NIH HHS/ -- R01 GM063919-08/GM/NIGMS NIH HHS/ -- R01 GM075922/GM/NIGMS NIH HHS/ -- R01 GM075922-04/GM/NIGMS NIH HHS/ -- New York, N.Y. -- Science. 2006 Jan 27;311(5760):531-5.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Chemistry and Biochemistry, Molecular Biology Institute, University of California, Los Angeles, 611 Charles E. Young Drive East, Los Angeles, CA 90095-1570, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/16439662" target="_blank"〉PubMed〈/a〉
    Schlagwort(e): Adaptor Proteins, Signal Transducing/analysis/*chemistry/genetics/metabolism ; Animals ; Binding Sites ; Crystallization ; Crystallography, X-Ray ; Hippocampus/chemistry ; Microscopy, Electron ; Models, Molecular ; Mutation ; Nerve Tissue Proteins ; Neurons/chemistry ; Protein Conformation ; Protein Folding ; Protein Structure, Quaternary ; Protein Structure, Tertiary ; Protein Subunits/chemistry ; Rats ; Recombinant Fusion Proteins/analysis ; Solubility ; Synapses/*chemistry ; Zinc/metabolism
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    Thema: Biologie , Chemie und Pharmazie , Informatik , Medizin , Allgemeine Naturwissenschaft , Physik
    Publiziert von American Association for the Advancement of Science (AAAS)
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  • 33
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    Volatile signaling in plant-plant interactions: "talking trees" in the genomics era (2006)
    American Association for the Advancement of Science (AAAS)
    Details
    Publikationsdatum: 2006-02-14
    Beschreibung: Plants may "eavesdrop" on volatile organic compounds (VOCs) released by herbivore-attacked neighbors to activate defenses before being attacked themselves. Transcriptome and signal cascade analyses of VOC-exposed plants suggest that plants eavesdrop to prime direct and indirect defenses and to hone competitive abilities. Advances in research on VOC biosynthesis and perception have facilitated the production of plants that are genetically "deaf" to particular VOCs or "mute" in elements of their volatile vocabulary. Such plants, together with advances in VOC analytical instrumentation, will allow researchers to determine whether fluency enhances the fitness of plants in natural communities.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Baldwin, Ian T -- Halitschke, Rayko -- Paschold, Anja -- von Dahl, Caroline C -- Preston, Catherine A -- New York, N.Y. -- Science. 2006 Feb 10;311(5762):812-5.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Molecular Ecology, Max Planck Institute for Chemical Ecology, Hans Knoll Strasse 8, Jena 07745, Germany. baldwin@ice.mpg.de〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/16469918" target="_blank"〉PubMed〈/a〉
    Schlagwort(e): *Adaptation, Physiological ; Diffusion ; Gene Expression Regulation, Plant ; Genomics ; Mutation ; Oligonucleotide Array Sequence Analysis ; Organic Chemicals/*metabolism ; Plant Leaves/metabolism ; *Plant Physiological Phenomena ; Plants/*genetics/metabolism ; Signal Transduction ; Volatilization
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    Thema: Biologie , Chemie und Pharmazie , Informatik , Medizin , Allgemeine Naturwissenschaft , Physik
    Publiziert von American Association for the Advancement of Science (AAAS)
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    Immunology. Foiled dendritic cell suicide may lead to autoimmunity (2006)
    American Association for the Advancement of Science (AAAS)
    Details
    Publikationsdatum: 2006-02-25
    Beschreibung: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Marx, Jean -- New York, N.Y. -- Science. 2006 Feb 24;311(5764):1086.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/16497897" target="_blank"〉PubMed〈/a〉
    Schlagwort(e): Animals ; *Apoptosis ; Autoimmune Diseases/immunology ; *Autoimmunity ; Caspase 10 ; Caspase Inhibitors ; Caspases/genetics/metabolism ; Dendritic Cells/*immunology/*physiology ; Humans ; Lymphocyte Activation ; Mice ; Mutation ; Viral Proteins/genetics/metabolism
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    Thema: Biologie , Chemie und Pharmazie , Informatik , Medizin , Allgemeine Naturwissenschaft , Physik
    Publiziert von American Association for the Advancement of Science (AAAS)
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  • 35
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    Targeting tyrosine kinases in cancer: the second wave (2006)
    American Association for the Advancement of Science (AAAS)
    Details
    Publikationsdatum: 2006-05-27
    Beschreibung: One of the most exciting developments in cancer research in recent years has been the clinical validation of molecularly targeted drugs that inhibit the action of pathogenic tyrosine kinases. Treatment of appropriately selected patients with these drugs can alter the natural history of their disease and improve survival. The clinical validation of these "first-generation" tyrosine kinase inhibitors has been the prelude to a second wave of advances in molecular targeting that is expected to further change the way we classify and treat cancer. Efforts are now being directed at identifying the tumor subtypes and patients who will benefit the most from these drugs. In addition, new compounds that circumvent acquired resistance to the first-generation tyrosine kinase inhibitors are being tested in patients with refractory disease. Agents directed against new molecular targets are also being explored.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Baselga, Jose -- New York, N.Y. -- Science. 2006 May 26;312(5777):1175-8.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Oncology Program, Vall d'Hebron University Hospital and Vall d'Hebron Research Institute, Universidad Autonoma de Barcelona, Barcelona 08035, Spain. jbaselga@vhebron.net〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/16728632" target="_blank"〉PubMed〈/a〉
    Schlagwort(e): Antibodies, Monoclonal/pharmacology/therapeutic use ; Antibodies, Monoclonal, Humanized ; Antineoplastic Agents/*therapeutic use ; Benzamides ; Drug Resistance, Neoplasm ; Fusion Proteins, bcr-abl/antagonists & inhibitors/metabolism ; Humans ; Imatinib Mesylate ; Mutation ; Neoplasms/*drug therapy/enzymology/genetics ; Piperazines/pharmacology/therapeutic use ; Protein Kinase Inhibitors/*therapeutic use ; Protein-Tyrosine Kinases/*antagonists & inhibitors/genetics ; Proto-Oncogene Proteins c-kit/metabolism ; Pyrimidines/pharmacology/therapeutic use ; Receptor, Epidermal Growth Factor/antagonists & inhibitors/metabolism ; Receptor, ErbB-2/antagonists & inhibitors/metabolism ; Receptors, Platelet-Derived Growth Factor/antagonists & inhibitors/metabolism ; Trastuzumab
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    Thema: Biologie , Chemie und Pharmazie , Informatik , Medizin , Allgemeine Naturwissenschaft , Physik
    Publiziert von American Association for the Advancement of Science (AAAS)
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    Avian influenza. Amid mayhem in Turkey, experts see new chances for research (2006)
    American Association for the Advancement of Science (AAAS)
    Details
    Publikationsdatum: 2006-01-21
    Beschreibung: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Enserink, Martin -- New York, N.Y. -- Science. 2006 Jan 20;311(5759):314-5.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/16424301" target="_blank"〉PubMed〈/a〉
    Schlagwort(e): Animals ; Antibodies, Viral/blood ; *Disease Outbreaks/veterinary ; Humans ; *Influenza A Virus, H5N1 Subtype/genetics/immunology/pathogenicity ; Influenza in Birds/*epidemiology/virology ; Influenza, Human/*epidemiology/transmission/*virology ; International Cooperation ; Mutation ; Poultry ; Seroepidemiologic Studies ; Turkey/epidemiology
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    Thema: Biologie , Chemie und Pharmazie , Informatik , Medizin , Allgemeine Naturwissenschaft , Physik
    Publiziert von American Association for the Advancement of Science (AAAS)
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  • 37
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    Avian influenza. More cases in Turkey, but no mutations found (2006)
    American Association for the Advancement of Science (AAAS)
    Details
    Publikationsdatum: 2006-01-18
    Beschreibung: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Enserink, Martin -- New York, N.Y. -- Science. 2006 Jan 13;311(5758):161.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/16410495" target="_blank"〉PubMed〈/a〉
    Schlagwort(e): Animals ; Humans ; Influenza A Virus, H5N1 Subtype/*genetics ; Influenza in Birds/transmission/virology ; Influenza, Human/transmission/*virology ; Mutation ; Poultry ; Poultry Diseases/transmission/virology ; Turkey
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    Thema: Biologie , Chemie und Pharmazie , Informatik , Medizin , Allgemeine Naturwissenschaft , Physik
    Publiziert von American Association for the Advancement of Science (AAAS)
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  • 38
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    Activity-dependent regulation of MEF2 transcription factors suppresses excitatory synapse number (2006)
    American Association for the Advancement of Science (AAAS)
    Details
    Publikationsdatum: 2006-02-18
    Beschreibung: In the mammalian nervous system, neuronal activity regulates the strength and number of synapses formed. The genetic program that coordinates this process is poorly understood. We show that myocyte enhancer factor 2 (MEF2) transcription factors suppressed excitatory synapse number in a neuronal activity- and calcineurin-dependent manner as hippocampal neurons formed synapses. In response to increased neuronal activity, calcium influx into neurons induced the activation of the calcium/calmodulin-regulated phosphatase calcineurin, which dephosphorylated and activated MEF2. When activated, MEF2 promoted the transcription of a set of genes, including arc and synGAP, that restrict synapse number. These findings define an activity-dependent transcriptional program that may control synapse number during development.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Flavell, Steven W -- Cowan, Christopher W -- Kim, Tae-Kyung -- Greer, Paul L -- Lin, Yingxi -- Paradis, Suzanne -- Griffith, Eric C -- Hu, Linda S -- Chen, Chinfei -- Greenberg, Michael E -- AG05870/AG/NIA NIH HHS/ -- HD18655/HD/NICHD NIH HHS/ -- NS28829/NS/NINDS NIH HHS/ -- R01 EY013613/EY/NEI NIH HHS/ -- New York, N.Y. -- Science. 2006 Feb 17;311(5763):1008-12.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Neurobiology Program, Children's Hospital, and Departments of Neurology and Neurobiology, Harvard Medical School, 300 Longwood Avenue, Boston, MA 02115, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/16484497" target="_blank"〉PubMed〈/a〉
    Schlagwort(e): Animals ; Calcineurin/metabolism ; Calcium/metabolism ; Cells, Cultured ; Cytoskeletal Proteins/genetics ; Dendrites/physiology/ultrastructure ; Excitatory Postsynaptic Potentials ; GTPase-Activating Proteins/genetics ; Gene Expression Regulation ; Glutamic Acid/metabolism ; Hippocampus/cytology/*physiology ; MEF2 Transcription Factors ; Mutation ; Myogenic Regulatory Factors/genetics/*physiology ; Nerve Tissue Proteins/genetics ; Neurons/*physiology ; Oligonucleotide Array Sequence Analysis ; Phosphorylation ; RNA Interference ; Rats ; Rats, Long-Evans ; Recombinant Fusion Proteins/metabolism ; Synapses/*physiology ; Synaptic Transmission ; Transcription, Genetic ; Transfection
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    Thema: Biologie , Chemie und Pharmazie , Informatik , Medizin , Allgemeine Naturwissenschaft , Physik
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  • 39
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    Recognition of histone H3 lysine-4 methylation by the double tudor domain of JMJD2A (2006)
    American Association for the Advancement of Science (AAAS)
    Details
    Publikationsdatum: 2006-04-08
    Beschreibung: Biological responses to histone methylation critically depend on the faithful readout and transduction of the methyl-lysine signal by "effector" proteins, yet our understanding of methyl-lysine recognition has so far been limited to the study of histone binding by chromodomain and WD40-repeat proteins. The double tudor domain of JMJD2A, a Jmjc domain-containing histone demethylase, binds methylated histone H3-K4 and H4-K20. We found that the double tudor domain has an interdigitated structure, and the unusual fold is required for its ability to bind methylated histone tails. The cocrystal structure of the JMJD2A double tudor domain with a trimethylated H3-K4 peptide reveals that the trimethyl-K4 is bound in a cage of three aromatic residues, two of which are from the tudor-2 motif, whereas the binding specificity is determined by side-chain interactions involving amino acids from the tudor-1 motif. Our study provides mechanistic insights into recognition of methylated histone tails by tudor domains and reveals the structural intricacy of methyl-lysine recognition by two closely spaced effector domains.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Huang, Ying -- Fang, Jia -- Bedford, Mark T -- Zhang, Yi -- Xu, Rui-Ming -- DK62248/DK/NIDDK NIH HHS/ -- GM 63718/GM/NIGMS NIH HHS/ -- GM68804/GM/NIGMS NIH HHS/ -- New York, N.Y. -- Science. 2006 May 5;312(5774):748-51. Epub 2006 Apr 6.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉W. M. Keck Structural Biology Laboratory, Cold Spring Harbor Laboratory, Cold Spring Harbor, NY 11724, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/16601153" target="_blank"〉PubMed〈/a〉
    Schlagwort(e): Amino Acid Motifs ; Amino Acid Sequence ; Binding Sites ; Crystallography, X-Ray ; DNA-Binding Proteins/*chemistry/genetics/*metabolism ; Histones/*chemistry/*metabolism ; Humans ; Hydrogen Bonding ; Jumonji Domain-Containing Histone Demethylases ; Lysine/metabolism ; Methylation ; Models, Molecular ; Molecular Sequence Data ; Mutation ; Oxidoreductases, N-Demethylating ; Protein Binding ; Protein Conformation ; Protein Folding ; Protein Structure, Tertiary ; Static Electricity ; Transcription Factors/*chemistry/genetics/*metabolism
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    Thema: Biologie , Chemie und Pharmazie , Informatik , Medizin , Allgemeine Naturwissenschaft , Physik
    Publiziert von American Association for the Advancement of Science (AAAS)
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  • 40
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    Autophagic fungal cell death is necessary for infection by the rice blast fungus (2006)
    American Association for the Advancement of Science (AAAS)
    Details
    Publikationsdatum: 2006-04-29
    Beschreibung: Rice blast is caused by the fungus Magnaporthe grisea, which elaborates specialized infection cells called appressoria to penetrate the tough outer cuticle of the rice plant Oryza sativa. We found that the formation of an appressorium required, sequentially, the completion of mitosis, nuclear migration, and death of the conidium (fungal spore) from which the infection originated. Genetic intervention during mitosis prevented both appressorium development and conidium death. Impairment of autophagy, by the targeted mutation of the MgATG8 gene, arrested conidial cell death but rendered the fungus nonpathogenic. Thus, the initiation of rice blast requires autophagic cell death of the conidium.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Veneault-Fourrey, Claire -- Barooah, Madhumita -- Egan, Martin -- Wakley, Gavin -- Talbot, Nicholas J -- New York, N.Y. -- Science. 2006 Apr 28;312(5773):580-3.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉School of Biosciences, University of Exeter, Washington Singer Laboratories, Perry Road, Exeter EX4 4QG, UK.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/16645096" target="_blank"〉PubMed〈/a〉
    Schlagwort(e): Amino Acid Sequence ; *Autophagy ; Benomyl/pharmacology ; Cell Nucleus/physiology ; Cell Nucleus Division ; Genes, Fungal ; Hydroxyurea/pharmacology ; Magnaporthe/*cytology/genetics/pathogenicity/*physiology ; Microtubule-Associated Proteins/genetics/physiology ; Mitosis/drug effects ; Molecular Sequence Data ; Morphogenesis ; Mutation ; Oryza/*microbiology ; Plant Diseases/*microbiology ; Spores, Fungal/cytology/*physiology
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    Thema: Biologie , Chemie und Pharmazie , Informatik , Medizin , Allgemeine Naturwissenschaft , Physik
    Publiziert von American Association for the Advancement of Science (AAAS)
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  • 41
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    JETLAG resets the Drosophila circadian clock by promoting light-induced degradation of TIMELESS (2006)
    American Association for the Advancement of Science (AAAS)
    Details
    Publikationsdatum: 2006-06-24
    Beschreibung: Organisms ranging from bacteria to humans synchronize their internal clocks to daily cycles of light and dark. Photic entrainment of the Drosophila clock is mediated by proteasomal degradation of the clock protein TIMELESS (TIM). We have identified mutations in jetlag-a gene coding for an F-box protein with leucine-rich repeats-that result in reduced light sensitivity of the circadian clock. Mutant flies show rhythmic behavior in constant light, reduced phase shifts in response to light pulses, and reduced light-dependent degradation of TIM. Expression of JET along with the circadian photoreceptor cryptochrome (CRY) in cultured S2R cells confers light-dependent degradation onto TIM, thereby reconstituting the acute response + of the circadian clock to light in a cell culture system. Our results suggest that JET is essential for resetting the clock by transmitting light signals from CRY to TIM.〈br /〉〈br /〉〈a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC2767177/" target="_blank"〉〈img src="https://static.pubmed.gov/portal/portal3rc.fcgi/4089621/img/3977009" border="0"〉〈/a〉   〈a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC2767177/" target="_blank"〉This paper as free author manuscript - peer-reviewed and accepted for publication〈/a〉〈br /〉〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Koh, Kyunghee -- Zheng, Xiangzhong -- Sehgal, Amita -- NS048471/NS/NINDS NIH HHS/ -- R01 NS048471/NS/NINDS NIH HHS/ -- R01 NS048471-02/NS/NINDS NIH HHS/ -- Howard Hughes Medical Institute/ -- New York, N.Y. -- Science. 2006 Jun 23;312(5781):1809-12.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Howard Hughes Medical Institute, Department of Neuroscience, University of Pennsylvania School of Medicine, Philadelphia, PA 19104, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/16794082" target="_blank"〉PubMed〈/a〉
    Schlagwort(e): Amino Acid Sequence ; Amino Acid Substitution ; Animals ; Cells, Cultured ; *Circadian Rhythm ; Cryptochromes ; Drosophila/chemistry/genetics/physiology ; Drosophila Proteins/chemistry/*genetics/*metabolism/*physiology ; Drosophila melanogaster/chemistry/*genetics/*physiology ; Eye Proteins/metabolism ; F-Box Proteins/chemistry/*genetics/*physiology ; Female ; *Light ; Male ; Models, Biological ; Molecular Sequence Data ; Mutation ; Protein Structure, Tertiary ; Receptors, G-Protein-Coupled/metabolism ; Transgenes ; Ubiquitin/metabolism
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    Thema: Biologie , Chemie und Pharmazie , Informatik , Medizin , Allgemeine Naturwissenschaft , Physik
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    Antibody class switching mediated by yeast endonuclease-generated DNA breaks (2006)
    American Association for the Advancement of Science (AAAS)
    Details
    Publikationsdatum: 2006-12-16
    Beschreibung: Antibody class switching in activated B cells uses class switch recombination (CSR), which joins activation-induced cytidine deaminase (AID)-dependent double-strand breaks (DSBs) within two large immunoglobulin heavy chain (IgH) locus switch (S) regions that lie up to 200 kilobases apart. To test postulated roles of S regions and AID in CSR, we generated mutant B cells in which donor Smu and accepter Sgamma1 regions were replaced with yeast I-SceI endonuclease sites. We found that site-specific I-SceI DSBs mediate recombinational IgH locus class switching from IgM to IgG1 without S regions or AID. We propose that CSR evolved to exploit a general DNA repair process that promotes joining of widely separated DSBs within a chromosome.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Zarrin, Ali A -- Del Vecchio, Catherine -- Tseng, Eva -- Gleason, Megan -- Zarin, Payam -- Tian, Ming -- Alt, Frederick W -- 2P01AI031541-15/AI/NIAID NIH HHS/ -- P01CA092625-05/CA/NCI NIH HHS/ -- New York, N.Y. -- Science. 2007 Jan 19;315(5810):377-81. Epub 2006 Dec 14.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Howard Hughes Medical Institute, Children's Hospital, CBR Institute for Biomedical Research, and Department of Genetics, Harvard University Medical School, Boston, MA 02115, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/17170253" target="_blank"〉PubMed〈/a〉
    Schlagwort(e): Animals ; B-Lymphocytes/*immunology ; Base Sequence ; Cell Line ; Cytidine Deaminase/*metabolism ; *DNA Breaks, Double-Stranded ; DNA Repair ; Deoxyribonucleases, Type II Site-Specific/genetics/*metabolism ; Embryonic Stem Cells ; Gene Targeting ; Genes, Immunoglobulin Heavy Chain ; Hybridomas ; *Immunoglobulin Class Switching ; Immunoglobulin G/biosynthesis/genetics ; Immunoglobulin M/biosynthesis/genetics ; *Immunoglobulin Switch Region ; Lymphocyte Activation ; Mice ; Mice, Inbred C57BL ; Molecular Sequence Data ; Mutation ; Recombination, Genetic ; Saccharomyces cerevisiae/enzymology ; Saccharomyces cerevisiae Proteins
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    Thema: Biologie , Chemie und Pharmazie , Informatik , Medizin , Allgemeine Naturwissenschaft , Physik
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  • 43
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    Imaging of germinal center selection events during affinity maturation (2006)
    American Association for the Advancement of Science (AAAS)
    Details
    Publikationsdatum: 2006-12-23
    Beschreibung: The germinal center (GC) is an important site for the generation and selection of B cells bearing high-affinity antibodies, yet GC cell migration and interaction dynamics have not been directly observed. Using two-photon microscopy of mouse lymph nodes, we revealed that GC B cells are highly motile and extend long cell processes. They transited between GC dark and light zones and divided in both regions, although these B cells resided for only several hours in the light zone where antigen is displayed. GC B cells formed few stable contacts with GC T cells despite frequent encounters, and T cells were seen to carry dead B cell blebs. On the basis of these observations, we propose a model in which competition for T cell help plays a more dominant role in the selection of GC B cells than previously appreciated.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Allen, Christopher D C -- Okada, Takaharu -- Tang, H Lucy -- Cyster, Jason G -- New York, N.Y. -- Science. 2007 Jan 26;315(5811):528-31. Epub 2006 Dec 21.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Howard Hughes Medical Institute and Department of Microbiology and Immunology, University of California, San Francisco, CA 94143, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/17185562" target="_blank"〉PubMed〈/a〉
    Schlagwort(e): Animals ; *Antibody Affinity ; B-Lymphocytes/*cytology/*immunology/physiology ; Cell Cycle ; Cell Death ; Cell Movement ; Dendritic Cells, Follicular/cytology/physiology ; Germinal Center/cytology/*immunology ; Macrophages/physiology ; Mice ; Mice, Inbred C57BL ; Microscopy/methods ; Models, Immunological ; Mutation ; T-Lymphocytes/cytology/immunology/physiology
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    Thema: Biologie , Chemie und Pharmazie , Informatik , Medizin , Allgemeine Naturwissenschaft , Physik
    Publiziert von American Association for the Advancement of Science (AAAS)
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  • 44
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    Immunology. Antibodies get a break (2006)
    American Association for the Advancement of Science (AAAS)
    Details
    Publikationsdatum: 2006-12-16
    Beschreibung: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Chaudhuri, Jayanta -- Jasin, Maria -- R01 GM054668/GM/NIGMS NIH HHS/ -- New York, N.Y. -- Science. 2007 Jan 19;315(5810):335-6. Epub 2006 Dec 14.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Immunology Program, Memorial Sloan-Kettering Cancer Center, New York, NY 10021, USA. chaudhuj@mskcc.org〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/17170256" target="_blank"〉PubMed〈/a〉
    Schlagwort(e): Animals ; Antibody Formation ; B-Lymphocytes/*immunology ; Cytidine Deaminase/genetics/*metabolism ; DNA Breaks, Double-Stranded ; DNA Repair ; Deoxyribonucleases, Type II Site-Specific/*metabolism ; Genes, Immunoglobulin Heavy Chain ; *Immunoglobulin Class Switching ; *Immunoglobulin Switch Region ; Mice ; Mutation ; Recombination, Genetic ; Saccharomyces cerevisiae/enzymology ; Saccharomyces cerevisiae Proteins ; Transcription, Genetic
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    Thema: Biologie , Chemie und Pharmazie , Informatik , Medizin , Allgemeine Naturwissenschaft , Physik
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  • 45
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    Microbiology. Environmentally sensitive protein proves key to making yeast pathogenic (2006)
    American Association for the Advancement of Science (AAAS)
    Details
    Publikationsdatum: 2006-04-29
    Beschreibung: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Pennisi, Elizabeth -- New York, N.Y. -- Science. 2006 Apr 28;312(5773):515.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/16645062" target="_blank"〉PubMed〈/a〉
    Schlagwort(e): Animals ; Blastomyces/cytology/enzymology/*genetics/*pathogenicity ; Blastomycosis/microbiology ; Fungal Proteins/genetics/physiology ; Genes, Fungal ; Lung Diseases, Fungal/microbiology ; Mice ; Mutation ; Protein Kinases/*genetics/*physiology ; RNA Interference ; Soil Microbiology ; Spores, Fungal/physiology
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    Thema: Biologie , Chemie und Pharmazie , Informatik , Medizin , Allgemeine Naturwissenschaft , Physik
    Publiziert von American Association for the Advancement of Science (AAAS)
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    Odorant receptor-derived cAMP signals direct axonal targeting (2006)
    American Association for the Advancement of Science (AAAS)
    Details
    Publikationsdatum: 2006-09-23
    Beschreibung: In mammals, odorant receptors (ORs) direct the axons of olfactory sensory neurons (OSNs) toward targets in the olfactory bulb. We show that cyclic adenosine monophosphate (cAMP) signals that regulate the expression of axon guidance molecules are essential for the OR-instructed axonal projection. Genetic manipulations of ORs, stimulatory G protein, cAMP-dependent protein kinase, and cAMP response element-binding protein shifted the axonal projection sites along the anteriorposterior axis in the olfactory bulb. Thus, it is the OR-derived cAMP signals, rather than direct action of OR molecules, that determine the target destinations of OSNs.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Imai, Takeshi -- Suzuki, Misao -- Sakano, Hitoshi -- New York, N.Y. -- Science. 2006 Oct 27;314(5799):657-61. Epub 2006 Sep 21.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Biophysics and Biochemistry, Graduate School of Science, University of Tokyo, Tokyo 113-0032, Japan.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/16990513" target="_blank"〉PubMed〈/a〉
    Schlagwort(e): Animals ; Animals, Genetically Modified ; Axons/*physiology ; Cyclic AMP/*metabolism ; Cyclic AMP Response Element-Binding Protein/metabolism ; Cyclic AMP-Dependent Protein Kinases/metabolism ; GTP-Binding Protein alpha Subunits, Gs/metabolism ; Mice ; Mice, Inbred C57BL ; Mice, Transgenic ; Mutation ; Neuropilin-1/genetics/metabolism ; Olfactory Bulb/cytology/*physiology ; Olfactory Receptor Neurons/*physiology ; Oligonucleotide Array Sequence Analysis ; Rats ; Rats, Wistar ; Receptors, Odorant/*metabolism ; *Signal Transduction ; Transcription, Genetic
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    Thema: Biologie , Chemie und Pharmazie , Informatik , Medizin , Allgemeine Naturwissenschaft , Physik
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  • 47
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    Evolution. Hidden genetic variation yields caterpillar of a different color (2006)
    American Association for the Advancement of Science (AAAS)
    Details
    Publikationsdatum: 2006-02-04
    Beschreibung: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Pennisi, Elizabeth -- New York, N.Y. -- Science. 2006 Feb 3;311(5761):591.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/16456043" target="_blank"〉PubMed〈/a〉
    Schlagwort(e): Adaptation, Physiological/*genetics ; Animals ; *Biological Evolution ; Genes, Insect ; *Genetic Variation ; Juvenile Hormones/physiology ; Larva/genetics/physiology ; Manduca/*genetics/physiology ; Mutation ; Phenotype ; Pigmentation/*genetics ; Temperature
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    Thema: Biologie , Chemie und Pharmazie , Informatik , Medizin , Allgemeine Naturwissenschaft , Physik
    Publiziert von American Association for the Advancement of Science (AAAS)
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    PIN proteins perform a rate-limiting function in cellular auxin efflux (2006)
    American Association for the Advancement of Science (AAAS)
    Details
    Publikationsdatum: 2006-04-08
    Beschreibung: Intercellular flow of the phytohormone auxin underpins multiple developmental processes in plants. Plant-specific pin-formed (PIN) proteins and several phosphoglycoprotein (PGP) transporters are crucial factors in auxin transport-related development, yet the molecular function of PINs remains unknown. Here, we show that PINs mediate auxin efflux from mammalian and yeast cells without needing additional plant-specific factors. Conditional gain-of-function alleles and quantitative measurements of auxin accumulation in Arabidopsis and tobacco cultured cells revealed that the action of PINs in auxin efflux is distinct from PGP, rate-limiting, specific to auxins, and sensitive to auxin transport inhibitors. This suggests a direct involvement of PINs in catalyzing cellular auxin efflux.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Petrasek, Jan -- Mravec, Jozef -- Bouchard, Rodolphe -- Blakeslee, Joshua J -- Abas, Melinda -- Seifertova, Daniela -- Wisniewska, Justyna -- Tadele, Zerihun -- Kubes, Martin -- Covanova, Milada -- Dhonukshe, Pankaj -- Skupa, Petr -- Benkova, Eva -- Perry, Lucie -- Krecek, Pavel -- Lee, Ok Ran -- Fink, Gerald R -- Geisler, Markus -- Murphy, Angus S -- Luschnig, Christian -- Zazimalova, Eva -- Friml, Jiri -- New York, N.Y. -- Science. 2006 May 12;312(5775):914-8. Epub 2006 Apr 6.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Institute of Experimental Botany, the Academy of Sciences of the Czech Republic, 165 02 Prague 6, Czech Republic.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/16601150" target="_blank"〉PubMed〈/a〉
    Schlagwort(e): ATP-Binding Cassette Transporters/genetics/metabolism ; Arabidopsis/cytology/growth & development/*metabolism/physiology ; Arabidopsis Proteins/genetics/*metabolism ; Biological Transport ; Cell Membrane/metabolism ; Cells, Cultured ; Gravitropism ; HeLa Cells ; Humans ; Indoleacetic Acids/*metabolism ; Kinetics ; Membrane Transport Proteins/genetics/*metabolism ; Mutation ; Naphthaleneacetic Acids/metabolism ; Phthalimides/pharmacology ; Plant Roots/physiology ; Saccharomyces cerevisiae/genetics ; Tobacco ; Transfection ; Transformation, Genetic
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    Thema: Biologie , Chemie und Pharmazie , Informatik , Medizin , Allgemeine Naturwissenschaft , Physik
    Publiziert von American Association for the Advancement of Science (AAAS)
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  • 49
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    RNA interference directs innate immunity against viruses in adult Drosophila (2006)
    American Association for the Advancement of Science (AAAS)
    Details
    Publikationsdatum: 2006-03-25
    Beschreibung: Innate immunity against bacterial and fungal pathogens is mediated by Toll and immune deficiency (Imd) pathways, but little is known about the antiviral response in Drosophila. Here, we demonstrate that an RNA interference pathway protects adult flies from infection by two evolutionarily diverse viruses. Our work also describes a molecular framework for the viral immunity, in which viral double-stranded RNA produced during infection acts as the pathogen trigger whereas Drosophila Dicer-2 and Argonaute-2 act as host sensor and effector, respectively. These findings establish a Drosophila model for studying the innate immunity against viruses in animals.〈br /〉〈br /〉〈a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC1509097/" target="_blank"〉〈img src="https://static.pubmed.gov/portal/portal3rc.fcgi/4089621/img/3977009" border="0"〉〈/a〉   〈a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC1509097/" target="_blank"〉This paper as free author manuscript - peer-reviewed and accepted for publication〈/a〉〈br /〉〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Wang, Xiao-Hong -- Aliyari, Roghiyh -- Li, Wan-Xiang -- Li, Hong-Wei -- Kim, Kevin -- Carthew, Richard -- Atkinson, Peter -- Ding, Shou-Wei -- AI052447/AI/NIAID NIH HHS/ -- R01 AI052447/AI/NIAID NIH HHS/ -- R01 GM068743/GM/NIGMS NIH HHS/ -- New York, N.Y. -- Science. 2006 Apr 21;312(5772):452-4. Epub 2006 Mar 23.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Graduate Program for Microbiology, University of California, Riverside, CA 92521, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/16556799" target="_blank"〉PubMed〈/a〉
    Schlagwort(e): Animals ; Argonaute Proteins ; Cell Line ; Drosophila Proteins/genetics/metabolism/physiology ; Drosophila melanogaster/embryology/genetics/*immunology/*virology ; Embryo, Nonmammalian/immunology/virology ; Escherichia coli/physiology ; *Immunity, Innate ; Insect Viruses/genetics/*physiology ; Micrococcus luteus/physiology ; Mutation ; Nodaviridae/*physiology ; RNA Helicases/genetics/metabolism ; *RNA Interference ; RNA Viruses/genetics/physiology ; RNA, Double-Stranded/metabolism ; RNA, Small Interfering/metabolism ; RNA, Viral/genetics/metabolism ; RNA-Binding Proteins/genetics/physiology ; RNA-Induced Silencing Complex/genetics/physiology ; Ribonuclease III ; Signal Transduction ; Toll-Like Receptors/physiology ; Transfection ; Virus Replication
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    Thema: Biologie , Chemie und Pharmazie , Informatik , Medizin , Allgemeine Naturwissenschaft , Physik
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  • 50
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    The Neurospora checkpoint kinase 2: a regulatory link between the circadian and cell cycles (2006)
    American Association for the Advancement of Science (AAAS)
    Details
    Publikationsdatum: 2006-07-01
    Beschreibung: The clock gene period-4 (prd-4) in Neurospora was identified by a single allele displaying shortened circadian period and altered temperature compensation. Positional cloning followed by functional tests show that PRD-4 is an ortholog of mammalian checkpoint kinase 2 (Chk2). Expression of prd-4 is regulated by the circadian clock and, reciprocally, PRD-4 physically interacts with the clock component FRQ, promoting its phosphorylation. DNA-damaging agents can reset the clock in a manner that depends on time of day, and this resetting is dependent on PRD-4. Thus, prd-4, the Neurospora Chk2, identifies a molecular link that feeds back conditionally from circadian output to input and the cell cycle.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Pregueiro, Antonio M -- Liu, Qiuyun -- Baker, Christopher L -- Dunlap, Jay C -- Loros, Jennifer J -- MH44651/MH/NIMH NIH HHS/ -- P01 GM068087/GM/NIGMS NIH HHS/ -- R01 GM034985/GM/NIGMS NIH HHS/ -- R37GM34985/GM/NIGMS NIH HHS/ -- New York, N.Y. -- Science. 2006 Aug 4;313(5787):644-9. Epub 2006 Jun 29.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Genetics, Dartmouth Medical School, Hanover, NH 03755, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/16809488" target="_blank"〉PubMed〈/a〉
    Schlagwort(e): Amino Acid Sequence ; *Cell Cycle ; Checkpoint Kinase 2 ; *Circadian Rhythm ; Cloning, Molecular ; DNA Damage ; Feedback, Physiological ; Fungal Proteins/chemistry/genetics/metabolism ; Gene Expression Regulation, Fungal ; Genes, Fungal ; Methyl Methanesulfonate/pharmacology ; Molecular Sequence Data ; Mutation ; Neurospora/*enzymology/genetics ; Neurospora crassa/cytology/*enzymology/*physiology ; Phosphorylation ; Protein-Serine-Threonine Kinases/chemistry/*genetics/*metabolism
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    Thema: Biologie , Chemie und Pharmazie , Informatik , Medizin , Allgemeine Naturwissenschaft , Physik
    Publiziert von American Association for the Advancement of Science (AAAS)
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  • 51
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    FG-rich repeats of nuclear pore proteins form a three-dimensional meshwork with hydrogel-like properties (2006)
    American Association for the Advancement of Science (AAAS)
    Details
    Publikationsdatum: 2006-11-04
    Beschreibung: Nuclear pore complexes permit rapid passage of cargoes bound to nuclear transport receptors, but otherwise suppress nucleocytoplasmic fluxes of inert macromolecules 〉/=30 kilodaltons. To explain this selectivity, a sieve structure of the permeability barrier has been proposed that is created through reversible cross-linking between Phe and Gly (FG)-rich nucleoporin repeats. According to this model, nuclear transport receptors overcome the size limit of the sieve and catalyze their own nuclear pore-passage by a competitive disruption of adjacent inter-repeat contacts, which transiently opens adjoining meshes. Here, we found that phenylalanine-mediated inter-repeat interactions indeed cross-link FG-repeat domains into elastic and reversible hydrogels. Furthermore, we obtained evidence that such hydrogel formation is required for viability in yeast.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Frey, Steffen -- Richter, Ralf P -- Gorlich, Dirk -- New York, N.Y. -- Science. 2006 Nov 3;314(5800):815-7.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Zentrum fur Molekulare Biologie der Universitat Heidelberg (ZMBH), INF 282, D-69120 Heidelberg, Germany.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/17082456" target="_blank"〉PubMed〈/a〉
    Schlagwort(e): Active Transport, Cell Nucleus ; Amino Acid Motifs ; Amino Acid Sequence ; Biopolymers ; Calcium-Binding Proteins/*chemistry/genetics/*metabolism ; Fluorescence Recovery After Photobleaching ; HeLa Cells ; Humans ; Hydrogels ; Hydrogen-Ion Concentration ; Hydrophobic and Hydrophilic Interactions ; Models, Biological ; Molecular Sequence Data ; Mutation ; Nuclear Pore/chemistry/*metabolism ; Nuclear Pore Complex Proteins/*chemistry/*metabolism ; Nuclear Proteins/*chemistry/genetics/*metabolism ; Nucleocytoplasmic Transport Proteins/*metabolism ; Permeability ; Phenylalanine/chemistry ; Protein Structure, Tertiary ; Repetitive Sequences, Amino Acid ; Saccharomyces cerevisiae/chemistry/physiology ; Saccharomyces cerevisiae Proteins/*chemistry/genetics/*metabolism
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    Thema: Biologie , Chemie und Pharmazie , Informatik , Medizin , Allgemeine Naturwissenschaft , Physik
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    Direct demonstration of an adaptive constraint (2006)
    American Association for the Advancement of Science (AAAS)
    Details
    Publikationsdatum: 2006-10-21
    Beschreibung: The role of constraint in adaptive evolution is an open question. Directed evolution of an engineered beta-isopropylmalate dehydrogenase (IMDH), with coenzyme specificity switched from nicotinamide adenine dinucleotide (NAD) to nicotinamide adenine dinucleotide phosphate (NADP), always produces mutants with lower affinities for NADP. This result is the correlated response to selection for relief from inhibition by NADPH (the reduced form of NADP) expected of an adaptive landscape subject to three enzymatic constraints: an upper limit to the rate of maximum turnover (kcat), a correlation in NADP and NADPH affinities, and a trade-off between NAD and NADP usage. Two additional constraints, high intracellular NADPH abundance and the cost of compensatory protein synthesis, have ensured the conserved use of NAD by IMDH throughout evolution. Our results show that selective mechanisms and evolutionary constraints are to be understood in terms of underlying adaptive landscapes.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Miller, Stephen P -- Lunzer, Mark -- Dean, Antony M -- GM060611/GM/NIGMS NIH HHS/ -- New York, N.Y. -- Science. 2006 Oct 20;314(5798):458-61.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉BioTechnology Institute, University of Minnesota, St. Paul, MN 55108, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/17053145" target="_blank"〉PubMed〈/a〉
    Schlagwort(e): 3-Isopropylmalate Dehydrogenase/antagonists & ; inhibitors/chemistry/genetics/*metabolism ; *Adaptation, Physiological ; Amino Acid Substitution ; Binding Sites ; Codon ; *Directed Molecular Evolution ; Escherichia coli/*enzymology/growth & development/physiology ; *Evolution, Molecular ; Kinetics ; Mutation ; NAD/metabolism ; NADP/metabolism ; Phenotype ; Selection, Genetic
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    Thema: Biologie , Chemie und Pharmazie , Informatik , Medizin , Allgemeine Naturwissenschaft , Physik
    Publiziert von American Association for the Advancement of Science (AAAS)
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    A bifurcating pathway directs abscisic acid effects on stomatal closure and opening in Arabidopsis (2006)
    American Association for the Advancement of Science (AAAS)
    Details
    Publikationsdatum: 2006-04-15
    Beschreibung: Terrestrial plants lose water primarily through stomata, pores on the leaves. The hormone abscisic acid (ABA) decreases water loss by regulating opening and closing of stomata. Here, we show that phospholipase Dalpha1 (PLDalpha1) mediates the ABA effects on stomata through interaction with a protein phosphatase 2C (PP2C) and a heterotrimeric GTP-binding protein (G protein) in Arabidopsis. PLDalpha1-produced phosphatidic acid (PA) binds to the ABI1 PP2C to signal ABA-promoted stomatal closure, whereas PLDalpha1 and PA interact with the Galpha subunit of heterotrimeric G protein to mediate ABA inhibition of stomatal opening. The results reveal a bifurcating signaling pathway that regulates plant water loss.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Mishra, Girish -- Zhang, Wenhua -- Deng, Fan -- Zhao, Jian -- Wang, Xuemin -- New York, N.Y. -- Science. 2006 Apr 14;312(5771):264-6.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Biology, University of Missouri, St. Louis, MO 63121, USA, and Donald Danforth Plant Science Center, St. Louis, MO 63132, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/16614222" target="_blank"〉PubMed〈/a〉
    Schlagwort(e): Abscisic Acid/*metabolism ; Amino Acid Motifs ; Arabidopsis/genetics/metabolism/*physiology ; Arabidopsis Proteins/genetics/metabolism ; Crosses, Genetic ; GTP-Binding Protein alpha Subunits/metabolism ; Mutation ; Phosphatidic Acids/metabolism ; Phospholipase D/chemistry/genetics/*metabolism ; Phosphoprotein Phosphatases/genetics/metabolism ; Plant Leaves/*physiology ; *Signal Transduction ; Transgenes ; Water/metabolism
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    Thema: Biologie , Chemie und Pharmazie , Informatik , Medizin , Allgemeine Naturwissenschaft , Physik
    Publiziert von American Association for the Advancement of Science (AAAS)
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  • 54
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    Individual cell migration serves as the driving force for optic vesicle evagination (2006)
    American Association for the Advancement of Science (AAAS)
    Details
    Publikationsdatum: 2006-08-26
    Beschreibung: The cellular mechanisms underlying organ formation are largely unknown. We visualized early vertebrate eye morphogenesis at single-cell resolution by in vivo imaging in medaka (Oryzias latipes). Before optic vesicle evagination, retinal progenitor cells (RPCs) modulate their convergence in a fate-specific manner. Presumptive forebrain cells converge toward the midline, whereas medial RPCs remain stationary, predetermining the site of evagination. Subsequent optic vesicle evagination is driven by the active migration of individual RPCs. The analysis of mutants demonstrated that the retina-specific transcription factor rx3 determines the convergence and migration behaviors of RPCs. Hence, the migration of individual cells mediates essential steps of organ morphogenesis.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Rembold, Martina -- Loosli, Felix -- Adams, Richard J -- Wittbrodt, Joachim -- G0400709/Medical Research Council/United Kingdom -- New York, N.Y. -- Science. 2006 Aug 25;313(5790):1130-4.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Developmental Biology Unit, European Molecular Biology Laboratory, Meyerhofstrasse 1, 69117 Heidelberg, Germany.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/16931763" target="_blank"〉PubMed〈/a〉
    Schlagwort(e): Animals ; Animals, Genetically Modified ; *Cell Movement ; Cell Shape ; Central Nervous System/embryology ; Epithelial Cells/cytology/physiology ; Eye/*embryology ; Fish Proteins/genetics/physiology ; Gastrula/cytology ; Homeodomain Proteins/genetics/physiology ; Image Processing, Computer-Assisted ; Microscopy, Confocal ; Morphogenesis ; Mutation ; Oryzias/*embryology/genetics ; Prosencephalon/embryology ; Retina/cytology/*embryology ; Stem Cell Transplantation ; Stem Cells/*physiology
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    Thema: Biologie , Chemie und Pharmazie , Informatik , Medizin , Allgemeine Naturwissenschaft , Physik
    Publiziert von American Association for the Advancement of Science (AAAS)
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    MC1R germline variants confer risk for BRAF-mutant melanoma (2006)
    American Association for the Advancement of Science (AAAS)
    Details
    Publikationsdatum: 2006-07-01
    Beschreibung: Germline variants in MC1R, the gene encoding the melanocortin-1 receptor, and sun exposure increase risk for melanoma in Caucasians. The majority of melanomas that occur on skin with little evidence of chronic sun-induced damage (non-CSD melanoma) have mutations in the BRAF oncogene, whereas in melanomas on skin with marked CSD (CSD melanoma) these mutations are less frequent. In two independent Caucasian populations, we show that MC1R variants are strongly associated with BRAF mutations in non-CSD melanomas. In this tumor subtype, the risk for melanoma associated with MC1R is due to an increase in risk of developing melanomas with BRAF mutations.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Landi, Maria Teresa -- Bauer, Jurgen -- Pfeiffer, Ruth M -- Elder, David E -- Hulley, Benjamin -- Minghetti, Paola -- Calista, Donato -- Kanetsky, Peter A -- Pinkel, Daniel -- Bastian, Boris C -- K07 CA80700/CA/NCI NIH HHS/ -- P01 CA025874-25-A1/CA/NCI NIH HHS/ -- R01 CA5558/CA/NCI NIH HHS/ -- R01 CA94963/CA/NCI NIH HHS/ -- R33 CA95300/CA/NCI NIH HHS/ -- New York, N.Y. -- Science. 2006 Jul 28;313(5786):521-2. Epub 2006 Jun 29.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Division of Cancer Epidemiology and Genetics, National Cancer Institute, NIH, Bethesda, MD 20892, USA. landim@mail.nih.gov〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/16809487" target="_blank"〉PubMed〈/a〉
    Schlagwort(e): Adolescent ; Adult ; Aged ; Alleles ; Case-Control Studies ; Female ; Genetic Predisposition to Disease ; Genetic Variation ; *Germ-Line Mutation ; Humans ; Italy ; Male ; Melanoma/classification/*genetics/pathology ; Middle Aged ; Mutation ; Odds Ratio ; Proto-Oncogene Proteins B-raf/*genetics ; Receptor, Melanocortin, Type 1/*genetics ; Skin/pathology/*radiation effects ; Skin Neoplasms/classification/*genetics/pathology ; Sunlight/*adverse effects ; United States
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    Thema: Biologie , Chemie und Pharmazie , Informatik , Medizin , Allgemeine Naturwissenschaft , Physik
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    Developmental biology. Mixed messages in early development (2006)
    American Association for the Advancement of Science (AAAS)
    Details
    Publikationsdatum: 2006-04-08
    Beschreibung: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Cohen, Stephen M -- Brennecke, Julius -- New York, N.Y. -- Science. 2006 Apr 7;312(5770):65-6.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉European Molecular Biology Laboratory, Heidelberg, Germany. cohen@embl.de〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/16601183" target="_blank"〉PubMed〈/a〉
    Schlagwort(e): 3' Untranslated Regions ; Adenosine/metabolism ; Animals ; Embryo, Nonmammalian/*physiology ; *Embryonic Development ; Female ; Gene Expression Profiling ; *Gene Expression Regulation, Developmental ; MicroRNAs/*physiology ; Mutation ; Polymers/metabolism ; RNA Stability ; RNA, Messenger/genetics/*metabolism ; Ribonuclease III/metabolism ; Zebrafish/embryology ; Zygote/physiology
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    Thema: Biologie , Chemie und Pharmazie , Informatik , Medizin , Allgemeine Naturwissenschaft , Physik
    Publiziert von American Association for the Advancement of Science (AAAS)
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  • 57
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    Structural basis for ribosome recruitment and manipulation by a viral IRES RNA (2006)
    American Association for the Advancement of Science (AAAS)
    Details
    Publikationsdatum: 2006-11-25
    Beschreibung: Canonical cap-dependent translation initiation requires a large number of protein factors that act in a stepwise assembly process. In contrast, internal ribosomal entry sites (IRESs) are cis-acting RNAs that in some cases completely supplant these factors by recruiting and activating the ribosome using a single structured RNA. Here we present the crystal structures of the ribosome-binding domain from a Dicistroviridae intergenic region IRES at 3.1 angstrom resolution, providing a view of the prefolded architecture of an all-RNA translation initiation apparatus. Docking of the structure into cryo-electron microscopy reconstructions of an IRES-ribosome complex suggests a model for ribosome manipulation by a dynamic IRES RNA.〈br /〉〈br /〉〈a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC2669756/" target="_blank"〉〈img src="https://static.pubmed.gov/portal/portal3rc.fcgi/4089621/img/3977009" border="0"〉〈/a〉   〈a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC2669756/" target="_blank"〉This paper as free author manuscript - peer-reviewed and accepted for publication〈/a〉〈br /〉〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Pfingsten, Jennifer S -- Costantino, David A -- Kieft, Jeffrey S -- R01 GM072560/GM/NIGMS NIH HHS/ -- R01 GM072560-01/GM/NIGMS NIH HHS/ -- R01 GM072560-02/GM/NIGMS NIH HHS/ -- R01 GM072560-03/GM/NIGMS NIH HHS/ -- R01 GM072560-04/GM/NIGMS NIH HHS/ -- R01 GM072560-05/GM/NIGMS NIH HHS/ -- New York, N.Y. -- Science. 2006 Dec 1;314(5804):1450-4. Epub 2006 Nov 23.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Biochemistry and Molecular Genetics, University of Colorado at Denver and Health Sciences Center, Mail Stop 8101, Post Office Box 6511, Aurora, CO 80045, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/17124290" target="_blank"〉PubMed〈/a〉
    Schlagwort(e): Binding Sites ; Cryoelectron Microscopy ; Crystallization ; Crystallography, X-Ray ; Models, Molecular ; Mutation ; Nucleic Acid Conformation ; *Protein Biosynthesis ; RNA Viruses/*genetics ; RNA, Viral/*chemistry/genetics/metabolism ; *Regulatory Sequences, Ribonucleic Acid/genetics ; Ribosomes/*metabolism
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    Thema: Biologie , Chemie und Pharmazie , Informatik , Medizin , Allgemeine Naturwissenschaft , Physik
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    Wnt gradient formation requires retromer function in Wnt-producing cells (2006)
    American Association for the Advancement of Science (AAAS)
    Details
    Publikationsdatum: 2006-04-29
    Beschreibung: Wnt proteins function as morphogens that can form long-range concentration gradients to pattern developing tissues. Here, we show that the retromer, a multiprotein complex involved in intracellular protein trafficking, is required for long-range signaling of the Caenorhabditis elegans Wnt ortholog EGL-20. The retromer functions in EGL-20-producing cells to allow the formation of an EGL-20 gradient along the anteroposterior axis. This function is evolutionarily conserved, because Wnt target gene expression is also impaired in the absence of the retromer complex in vertebrates. These results demonstrate that the ability of Wnt to regulate long-range patterning events is dependent on a critical and conserved function of the retromer complex within Wnt-producing cells.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Coudreuse, Damien Y M -- Roel, Giulietta -- Betist, Marco C -- Destree, Olivier -- Korswagen, Hendrik C -- New York, N.Y. -- Science. 2006 May 12;312(5775):921-4. Epub 2006 Apr 27.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Hubrecht Laboratory and Center for Biomedical Genetics, Uppsalalaan 8, 3584 CT, Utrecht, Netherlands.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/16645052" target="_blank"〉PubMed〈/a〉
    Schlagwort(e): Animals ; Body Patterning ; Caenorhabditis elegans/cytology/genetics/growth & development/*physiology ; Caenorhabditis elegans Proteins/analysis/genetics/*physiology ; Cell Line ; Gene Expression ; Glycoproteins/analysis/genetics/*physiology ; Humans ; Multiprotein Complexes/*physiology ; Mutation ; Neurons/cytology/physiology ; RNA Interference ; *Signal Transduction ; Transgenes ; Vesicular Transport Proteins/genetics/physiology ; Wnt Proteins/*physiology ; Xenopus
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    Thema: Biologie , Chemie und Pharmazie , Informatik , Medizin , Allgemeine Naturwissenschaft , Physik
    Publiziert von American Association for the Advancement of Science (AAAS)
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    Biomedical research. Bone disease gene finally found (2006)
    American Association for the Advancement of Science (AAAS)
    Details
    Publikationsdatum: 2006-04-29
    Beschreibung: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Couzin, Jennifer -- New York, N.Y. -- Science. 2006 Apr 28;312(5773):514-5.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/16645061" target="_blank"〉PubMed〈/a〉
    Schlagwort(e): Activin Receptors, Type I/chemistry/*genetics/physiology ; Bone Development/genetics ; Bone Morphogenetic Proteins/metabolism ; Humans ; Mutation ; Myositis Ossificans/*genetics
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    Thema: Biologie , Chemie und Pharmazie , Informatik , Medizin , Allgemeine Naturwissenschaft , Physik
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    Comment on "Evidence for positive epistasis in HIV-1" (2006)
    American Association for the Advancement of Science (AAAS)
    Details
    Publikationsdatum: 2006-05-13
    Beschreibung: Bonhoeffer et al. (Reports, 26 November 2004, p. 1547) presented evidence for positive epistasis in a clinical data set of HIV-1 mutants and corresponding fitness values. We demonstrate that biases in the original and simulated data sets may lead to erroneous evidence for epistasis. More rigorous statistical tests must be used to account for such biases before one can infer epistasis.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Wang, Kai -- Mittler, John E -- Samudrala, Ram -- GM068152/GM/NIGMS NIH HHS/ -- R01-HL72631/HL/NHLBI NIH HHS/ -- R03-AI055394/AI/NIAID NIH HHS/ -- New York, N.Y. -- Science. 2006 May 12;312(5775):848; author reply 848.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Microbiology, University of Washington, Seattle, WA 98195, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/16690844" target="_blank"〉PubMed〈/a〉
    Schlagwort(e): Anti-HIV Agents/pharmacology/therapeutic use ; Bias (Epidemiology) ; *Epistasis, Genetic ; Evolution, Molecular ; Genotype ; HIV Infections/drug therapy/virology ; HIV-1/drug effects/*genetics ; Humans ; Mutation ; Phenotype ; *Recombination, Genetic ; Software
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    Thema: Biologie , Chemie und Pharmazie , Informatik , Medizin , Allgemeine Naturwissenschaft , Physik
    Publiziert von American Association for the Advancement of Science (AAAS)
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    Chemical rescue of a mutant enzyme in living cells (2006)
    American Association for the Advancement of Science (AAAS)
    Details
    Publikationsdatum: 2006-03-04
    Beschreibung: The restoration of catalytic activity to mutant enzymes by small molecules is well established for in vitro systems. Here, we show that the protein tyrosine kinase Src arginine-388--〉alanine (R388A) mutant can be rescued in live cells with the use of the small molecule imidazole. Cellular rescue of a viral Src homolog was rapid and reversible and conferred predicted oncogenic properties. Using chemical rescue in combination with mass spectrometry, we confirmed six known Src kinase substrates and identified several new protein targets. Chemical rescue data suggest that cellular Src is active under basal conditions. Rescue of R388A cellular Src provided insights into the mitogen-activated protein kinase pathway. This chemical rescue approach will likely have many applications in cell signaling.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Qiao, Yingfeng -- Molina, Henrik -- Pandey, Akhilesh -- Zhang, Jin -- Cole, Philip A -- New York, N.Y. -- Science. 2006 Mar 3;311(5765):1293-7.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Pharmacology and Molecular Sciences, Johns Hopkins University School of Medicine, Baltimore, MD 21205, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/16513984" target="_blank"〉PubMed〈/a〉
    Schlagwort(e): Adaptor Proteins, Signal Transducing/metabolism ; Animals ; Cell Line ; Cell Transformation, Neoplastic ; Fluorescence Resonance Energy Transfer ; Gene Expression Profiling ; Gene Expression Regulation ; Growth Substances/metabolism/pharmacology ; Humans ; Imidazoles/*metabolism/pharmacology ; Kinetics ; Mice ; Mitogen-Activated Protein Kinases/metabolism ; Mutation ; Nuclear Proteins/metabolism ; Oligonucleotide Array Sequence Analysis ; Phenotype ; Phosphorylation ; Phosphotyrosine/metabolism ; Proto-Oncogene Proteins/metabolism ; Proto-Oncogene Proteins pp60(c-src)/*genetics/*metabolism ; Recombinant Proteins/metabolism ; Transfection ; src Homology Domains
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    Thema: Biologie , Chemie und Pharmazie , Informatik , Medizin , Allgemeine Naturwissenschaft , Physik
    Publiziert von American Association for the Advancement of Science (AAAS)
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    Progressive disruption of cellular protein folding in models of polyglutamine diseases (2006)
    American Association for the Advancement of Science (AAAS)
    Details
    Publikationsdatum: 2006-02-14
    Beschreibung: Numerous human diseases are associated with the chronic expression of misfolded and aggregation-prone proteins. The expansion of polyglutamine residues in unrelated proteins is associated with the early onset of neurodegenerative disease. To understand how the presence of misfolded proteins leads to cellular dysfunction, we employed Caenorhabditis elegans polyglutamine aggregation models. Here, we find that polyglutamine expansions disrupted the global balance of protein folding quality control, resulting in the loss of function of diverse metastable proteins with destabilizing temperature-sensitive mutations. In turn, these proteins, although innocuous under normal physiological conditions, enhanced the aggregation of polyglutamine proteins. Thus, weak folding mutations throughout the genome can function as modifiers of polyglutamine phenotypes and toxicity.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Gidalevitz, Tali -- Ben-Zvi, Anat -- Ho, Kim H -- Brignull, Heather R -- Morimoto, Richard I -- F32 GM075583-01/GM/NIGMS NIH HHS/ -- T32 GM08061/GM/NIGMS NIH HHS/ -- T32 HL076139/HL/NHLBI NIH HHS/ -- New York, N.Y. -- Science. 2006 Mar 10;311(5766):1471-4. Epub 2006 Feb 9.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Biochemistry, Molecular Biology, and Cell Biology, Rice Institute for Biomedical Research, Northwestern University, Evanston, IL 60208, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/16469881" target="_blank"〉PubMed〈/a〉
    Schlagwort(e): Animals ; Caenorhabditis elegans ; Caenorhabditis elegans Proteins/genetics/metabolism ; Disease Models, Animal ; Dynamin I/genetics/metabolism ; Glutamine/*metabolism ; Humans ; Mutation ; Neurodegenerative Diseases/*metabolism/physiopathology ; Peptides/*metabolism ; *Protein Folding ; Temperature ; Tropomyosin/genetics/metabolism
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    Thema: Biologie , Chemie und Pharmazie , Informatik , Medizin , Allgemeine Naturwissenschaft , Physik
    Publiziert von American Association for the Advancement of Science (AAAS)
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    Immunology. Targeting the tolls (2006)
    American Association for the Advancement of Science (AAAS)
    Details
    Publikationsdatum: 2006-04-15
    Beschreibung: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Wickelgren, Ingrid -- New York, N.Y. -- Science. 2006 Apr 14;312(5771):184-7.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/16614188" target="_blank"〉PubMed〈/a〉
    Schlagwort(e): Adjuvants, Immunologic ; Animals ; Autoimmune Diseases/drug therapy/*immunology ; Coronary Artery Disease/drug therapy/immunology ; Humans ; Hypersensitivity/drug therapy/*immunology ; *Immunity, Innate ; Infection/drug therapy/*immunology ; Inflammation/drug therapy/*immunology ; Mice ; Mutation ; Sepsis/drug therapy/immunology ; Signal Transduction ; Toll-Like Receptors/antagonists & inhibitors/genetics/*immunology/physiology
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    Thema: Biologie , Chemie und Pharmazie , Informatik , Medizin , Allgemeine Naturwissenschaft , Physik
    Publiziert von American Association for the Advancement of Science (AAAS)
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    The competitive cost of antibiotic resistance in Mycobacterium tuberculosis (2006)
    American Association for the Advancement of Science (AAAS)
    Details
    Publikationsdatum: 2006-07-01
    Beschreibung: Mathematical models predict that the future of the multidrug-resistant tuberculosis epidemic will depend on the fitness cost of drug resistance. We show that in laboratory-derived mutants of Mycobacterium tuberculosis, rifampin resistance is universally associated with a competitive fitness cost and that this cost is determined by the specific resistance mutation and strain genetic background. In contrast, we demonstrate that prolonged patient treatment can result in multidrug-resistant strains with no fitness defect and that strains with low- or no-cost resistance mutations are also the most frequent among clinical isolates.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Gagneux, Sebastien -- Long, Clara Davis -- Small, Peter M -- Van, Tran -- Schoolnik, Gary K -- Bohannan, Brendan J M -- Wellcome Trust/United Kingdom -- New York, N.Y. -- Science. 2006 Jun 30;312(5782):1944-6.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Division of Infectious Diseases and Geographic Medicine, Stanford University, Stanford, CA 94305, USA. sgagneux@systemsbiology.org〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/16809538" target="_blank"〉PubMed〈/a〉
    Schlagwort(e): Amino Acid Substitution ; Antibiotics, Antitubercular/*pharmacology/therapeutic use ; Bacterial Proteins/genetics ; DNA-Directed RNA Polymerases/genetics ; *Drug Resistance, Multiple, Bacterial ; Humans ; Models, Biological ; Mutation ; Mutation, Missense ; Mycobacterium tuberculosis/*drug effects/genetics/*growth & development ; Rifampin/*pharmacology/therapeutic use ; Tuberculosis, Multidrug-Resistant/drug therapy/*microbiology
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    Thema: Biologie , Chemie und Pharmazie , Informatik , Medizin , Allgemeine Naturwissenschaft , Physik
    Publiziert von American Association for the Advancement of Science (AAAS)
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    The Ste5 scaffold allosterically modulates signaling output of the yeast mating pathway (2006)
    American Association for the Advancement of Science (AAAS)
    Details
    Publikationsdatum: 2006-01-21
    Beschreibung: Scaffold proteins organize signaling proteins into pathways and are often viewed as passive assembly platforms. We found that the Ste5 scaffold has a more active role in the yeast mating pathway: A fragment of Ste5 allosterically activated autophosphorylation of the mitogen-activated protein kinase Fus3. The resulting form of Fus3 is partially active-it is phosphorylated on only one of two key residues in the activation loop. Unexpectedly, at a systems level, autoactivated Fus3 appears to have a negative regulatory role, promoting Ste5 phosphorylation and a decrease in pathway transcriptional output. Thus, scaffolds not only direct basic pathway connectivity but can precisely tune quantitative pathway input-output properties.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Bhattacharyya, Roby P -- Remenyi, Attila -- Good, Matthew C -- Bashor, Caleb J -- Falick, Arnold M -- Lim, Wendell A -- New York, N.Y. -- Science. 2006 Feb 10;311(5762):822-6. Epub 2006 Jan 19.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Cellular and Molecular Pharmacology, University of California-San Francisco, 600 16th Street, San Francisco, CA 94143-2240, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/16424299" target="_blank"〉PubMed〈/a〉
    Schlagwort(e): Adaptor Proteins, Signal Transducing/*chemistry/genetics/*metabolism ; Allosteric Regulation ; Amino Acid Motifs ; Binding Sites ; Crystallography, X-Ray ; Down-Regulation ; Enzyme Activation ; *MAP Kinase Signaling System ; Mitogen-Activated Protein Kinases/*chemistry/*metabolism ; Models, Biological ; Models, Molecular ; Mutation ; Pheromones/*physiology ; Phosphorylation ; Protein Binding ; Protein Conformation ; Protein Structure, Secondary ; Protein Structure, Tertiary ; Saccharomyces cerevisiae/genetics/*metabolism ; Saccharomyces cerevisiae Proteins/*chemistry/genetics/*metabolism ; Transcription, Genetic
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    Thema: Biologie , Chemie und Pharmazie , Informatik , Medizin , Allgemeine Naturwissenschaft , Physik
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    Host species barriers to influenza virus infections (2006)
    American Association for the Advancement of Science (AAAS)
    Details
    Publikationsdatum: 2006-04-22
    Beschreibung: Most emerging infectious diseases in humans originate from animal reservoirs; to contain and eradicate these diseases we need to understand how and why some pathogens become capable of crossing host species barriers. Influenza virus illustrates the interaction of factors that limit the transmission and subsequent establishment of an infection in a novel host species. Influenza species barriers can be categorized into virus-host interactions occurring within individuals and host-host interactions, either within or between species, that affect transmission between individuals. Viral evolution can help surmount species barriers, principally by affecting virus-host interactions; however, evolving the capability for sustained transmission in a new host species represents a major adaptive challenge because the number of mutations required is often large.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Kuiken, Thijs -- Holmes, Edward C -- McCauley, John -- Rimmelzwaan, Guus F -- Williams, Catherine S -- Grenfell, Bryan T -- New York, N.Y. -- Science. 2006 Apr 21;312(5772):394-7.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Virology, Erasmus Medical Center, 3015 GE Rotterdam, Netherlands. t.kuiken@erasmusmc.nl〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/16627737" target="_blank"〉PubMed〈/a〉
    Schlagwort(e): Animals ; Birds ; Evolution, Molecular ; Humans ; Immunity, Innate ; Influenza A Virus, H5N1 Subtype/genetics/immunology/*pathogenicity/physiology ; Influenza A virus/genetics/immunology/*pathogenicity/physiology ; Influenza in Birds/transmission/virology ; Influenza, Human/epidemiology/immunology/*transmission/*virology ; Mutation ; Orthomyxoviridae Infections/immunology/transmission/veterinary/virology ; Poultry ; Reassortant Viruses ; Receptors, Virus/metabolism ; Recombination, Genetic ; Species Specificity ; Virus Replication ; Zoonoses
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    Thema: Biologie , Chemie und Pharmazie , Informatik , Medizin , Allgemeine Naturwissenschaft , Physik
    Publiziert von American Association for the Advancement of Science (AAAS)
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    Genetics. Biobank ties cancer genes to rare developmental syndrome (2006)
    American Association for the Advancement of Science (AAAS)
    Details
    Publikationsdatum: 2006-01-28
    Beschreibung: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Vogel, Gretchen -- New York, N.Y. -- Science. 2006 Jan 27;311(5760):456.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/16439635" target="_blank"〉PubMed〈/a〉
    Schlagwort(e): Abnormalities, Multiple/*genetics ; Biological Specimen Banks ; Cell Division ; Facial Bones/abnormalities ; Heart Defects, Congenital/*genetics ; Humans ; MAP Kinase Kinase 1/*genetics ; MAP Kinase Kinase 2/*genetics ; MAP Kinase Signaling System ; Medical Records Systems, Computerized ; Mutation ; Neoplasms/genetics ; Proto-Oncogene Proteins B-raf/*genetics ; Syndrome
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    Thema: Biologie , Chemie und Pharmazie , Informatik , Medizin , Allgemeine Naturwissenschaft , Physik
    Publiziert von American Association for the Advancement of Science (AAAS)
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    Waking experience affects sleep need in Drosophila (2006)
    American Association for the Advancement of Science (AAAS)
    Details
    Publikationsdatum: 2006-09-23
    Beschreibung: Sleep is a vital, evolutionarily conserved phenomenon, whose function is unclear. Although mounting evidence supports a role for sleep in the consolidation of memories, until now, a molecular connection between sleep, plasticity, and memory formation has been difficult to demonstrate. We establish Drosophila as a model to investigate this relation and demonstrate that the intensity and/or complexity of prior social experience stably modifies sleep need and architecture. Furthermore, this experience-dependent plasticity in sleep need is subserved by the dopaminergic and adenosine 3',5'-monophosphate signaling pathways and a particular subset of 17 long-term memory genes.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Ganguly-Fitzgerald, Indrani -- Donlea, Jeff -- Shaw, Paul J -- R01-NS051305-01A1/NS/NINDS NIH HHS/ -- New York, N.Y. -- Science. 2006 Sep 22;313(5794):1775-81.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Neurosciences Institute, 10640 John Jay Hopkins Drive, San Diego, CA 92101, USA. transposase@gmail.com〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/16990546" target="_blank"〉PubMed〈/a〉
    Schlagwort(e): Animals ; Brain Chemistry ; Circadian Rhythm ; Cyclic AMP/metabolism ; Dopamine/analysis/metabolism ; Drosophila melanogaster/genetics/growth & development/*physiology ; Female ; Hearing ; Learning ; Male ; Memory ; *Models, Animal ; Mutation ; Sexual Behavior, Animal ; Signal Transduction ; *Sleep ; Smell ; Social Environment ; Social Isolation ; Vision, Ocular
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    Thema: Biologie , Chemie und Pharmazie , Informatik , Medizin , Allgemeine Naturwissenschaft , Physik
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    Predictability and preparedness in influenza control (2006)
    American Association for the Advancement of Science (AAAS)
    Details
    Publikationsdatum: 2006-04-22
    Beschreibung: The threat of pandemic human influenza looms as we survey the ongoing avian influenza pandemic and wonder if and when it will jump species. What are the risks and how can we plan? The nub of the problem lies in the inherent variability of the virus, which makes prediction difficult. However, it is not impossible; mathematical models can help determine and quantify critical parameters and thresholds in the relationships of those parameters, even if the relationships are nonlinear and obscure to simple reasoning. Mathematical models can derive estimates for the levels of drug stockpiles needed to buy time, how and when to modify vaccines, whom to target with vaccines and drugs, and when to enforce quarantine measures. Regardless, the models used for pandemic planning must be tested, and for this we must continue to gather data, not just for exceptional scenarios but also for seasonal influenza.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Smith, Derek J -- DP1-OD000490-01/OD/NIH HHS/ -- New York, N.Y. -- Science. 2006 Apr 21;312(5772):392-4.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Zoology, University of Cambridge, Downing Street, Cambridge, CB2 3EJ, UK. dsmith@zoo.cam.ac.uk〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/16627736" target="_blank"〉PubMed〈/a〉
    Schlagwort(e): Antigenic Variation ; Antiviral Agents/administration & dosage/*therapeutic use ; Disease Outbreaks/*prevention & control ; Evolution, Molecular ; Forecasting ; Hemagglutinin Glycoproteins, Influenza Virus/immunology ; Humans ; Immunization Programs ; Influenza A Virus, H3N2 Subtype/genetics/immunology ; Influenza A Virus, H5N1 Subtype/genetics/immunology/pathogenicity ; Influenza A virus/immunology ; *Influenza Vaccines ; Influenza, Human/epidemiology/*prevention & control/transmission/virology ; Mathematics ; Models, Biological ; Mutation ; Quarantine
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    Thema: Biologie , Chemie und Pharmazie , Informatik , Medizin , Allgemeine Naturwissenschaft , Physik
    Publiziert von American Association for the Advancement of Science (AAAS)
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    Neuroscience. Getting a read on Rett syndrome (2006)
    American Association for the Advancement of Science (AAAS)
    Details
    Publikationsdatum: 2006-12-13
    Beschreibung: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Miller, Greg -- New York, N.Y. -- Science. 2006 Dec 8;314(5805):1536-7.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/17158303" target="_blank"〉PubMed〈/a〉
    Schlagwort(e): Animals ; Brain/pathology/physiopathology ; Brain-Derived Neurotrophic Factor/genetics/metabolism ; Corticotropin-Releasing Hormone/genetics/physiology ; Female ; Gene Silencing ; Humans ; Mental Disorders/genetics ; Methyl-CpG-Binding Protein 2/*genetics/metabolism/*physiology ; Mice ; Mutation ; Neurons/pathology/physiology ; Phosphorylation ; Rett Syndrome/*genetics/pathology/*physiopathology
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    Thema: Biologie , Chemie und Pharmazie , Informatik , Medizin , Allgemeine Naturwissenschaft , Physik
    Publiziert von American Association for the Advancement of Science (AAAS)
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    Prevention of Brca1-mediated mammary tumorigenesis in mice by a progesterone antagonist (2006)
    American Association for the Advancement of Science (AAAS)
    Details
    Publikationsdatum: 2006-12-02
    Beschreibung: Women with mutations in the breast cancer susceptibility gene BRCA1 are predisposed to breast and ovarian cancers. Why the BRCA1 protein suppresses tumor development specifically in ovarian hormone-sensitive tissues remains unclear. We demonstrate that mammary glands of nulliparous Brca1/p53-deficient mice accumulate lateral branches and undergo extensive alveologenesis, a phenotype that occurs only during pregnancy in wild-type mice. Progesterone receptors, but not estrogen receptors, are overexpressed in the mutant mammary epithelial cells because of a defect in their degradation by the proteasome pathway. Treatment of Brca1/p53-deficient mice with the progesterone antagonist mifepristone (RU 486) prevented mammary tumorigenesis. These findings reveal a tissue-specific function for the BRCA1 protein and raise the possibility that antiprogesterone treatment may be useful for breast cancer prevention in individuals with BRCA1 mutations.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Poole, Aleksandra Jovanovic -- Li, Ying -- Kim, Yoon -- Lin, Suh-Chin J -- Lee, Wen-Hwa -- Lee, Eva Y-H P -- CA049649/CA/NCI NIH HHS/ -- New York, N.Y. -- Science. 2006 Dec 1;314(5804):1467-70.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Biological Chemistry, University of California, Irvine, CA 92697-4037, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/17138902" target="_blank"〉PubMed〈/a〉
    Schlagwort(e): Animals ; Breast Neoplasms/genetics/metabolism ; Cell Line, Tumor ; Cell Proliferation ; Epithelial Cells/cytology/metabolism ; Estradiol/pharmacology ; Estrous Cycle ; Female ; *Genes, BRCA1 ; Genes, p53 ; Hormone Antagonists/*pharmacology/therapeutic use ; Humans ; Mammary Glands, Animal/cytology/metabolism ; Mammary Neoplasms, Animal/genetics/*prevention & control ; Mice ; Mifepristone/*pharmacology/therapeutic use ; Mutation ; Phosphorylation ; Progesterone/*antagonists & inhibitors/pharmacology ; Proteasome Endopeptidase Complex/metabolism ; RNA, Small Interfering ; Receptors, Estrogen/metabolism ; Receptors, Progesterone/genetics/*metabolism ; Ubiquitin/metabolism
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    Digitale ISSN: 1095-9203
    Thema: Biologie , Chemie und Pharmazie , Informatik , Medizin , Allgemeine Naturwissenschaft , Physik
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  • 72
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    Intron removal requires proofreading of U2AF/3' splice site recognition by DEK (2006)
    American Association for the Advancement of Science (AAAS)
    Details
    Publikationsdatum: 2006-07-01
    Beschreibung: Discrimination between splice sites and similar, nonsplice sequences is essential for correct intron removal and messenger RNA formation in eukaryotes. The 65- and 35-kD subunits of the splicing factor U2AF, U2AF65 and U2AF35, recognize, respectively, the pyrimidine-rich tract and the conserved terminal AG present at metazoan 3' splice sites. We report that DEK, a chromatin- and RNA-associated protein mutated or overexpressed in certain cancers, enforces 3' splice site discrimination by U2AF. DEK phosphorylated at serines 19 and 32 associates with U2AF35, facilitates the U2AF35-AG interaction and prevents binding of U2AF65 to pyrimidine tracts not followed by AG. DEK and its phosphorylation are required for intron removal, but not for splicing complex assembly, which indicates that proofreading of early 3' splice site recognition influences catalytic activation of the spliceosome.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Soares, Luis Miguel Mendes -- Zanier, Katia -- Mackereth, Cameron -- Sattler, Michael -- Valcarcel, Juan -- New York, N.Y. -- Science. 2006 Jun 30;312(5782):1961-5.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Centre de Regulacio Genomica, Passeig Maritim 37-49, 08003 Barcelona, Spain.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/16809543" target="_blank"〉PubMed〈/a〉
    Schlagwort(e): Adenosine Triphosphate/metabolism ; Chromosomal Proteins, Non-Histone/genetics/*metabolism ; Dimerization ; Dinucleoside Phosphates/metabolism ; HeLa Cells ; Humans ; *Introns ; Mutation ; Nuclear Proteins/*metabolism ; Oncogene Proteins/genetics/*metabolism ; Phosphorylation ; Pyrimidines/metabolism ; RNA Precursors/*metabolism ; *RNA Splicing ; RNA, Messenger/metabolism ; Recombinant Proteins/metabolism ; Ribonucleoprotein, U2 Small Nuclear ; Ribonucleoproteins/*metabolism ; Spliceosomes/metabolism
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    Thema: Biologie , Chemie und Pharmazie , Informatik , Medizin , Allgemeine Naturwissenschaft , Physik
    Publiziert von American Association for the Advancement of Science (AAAS)
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  • 73
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    Neurobiology. Despite mutated gene, mouse circadian clock keeps on ticking (2006)
    American Association for the Advancement of Science (AAAS)
    Details
    Publikationsdatum: 2006-05-06
    Beschreibung: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Miller, Greg -- New York, N.Y. -- Science. 2006 May 5;312(5774):673.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/16675672" target="_blank"〉PubMed〈/a〉
    Schlagwort(e): ARNTL Transcription Factors ; Animals ; Basic Helix-Loop-Helix Transcription Factors/genetics/metabolism ; Brain/metabolism ; CLOCK Proteins ; Circadian Rhythm/*genetics ; Gene Expression ; Liver/metabolism ; Mice ; Mice, Knockout ; Mutation ; Nerve Tissue Proteins/metabolism ; Protein Binding ; Trans-Activators/*genetics/physiology ; Transcription, Genetic
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    Thema: Biologie , Chemie und Pharmazie , Informatik , Medizin , Allgemeine Naturwissenschaft , Physik
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  • 74
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    Plant science. Viruses face a double defense by plant small RNAs (2006)
    American Association for the Advancement of Science (AAAS)
    Details
    Publikationsdatum: 2006-07-11
    Beschreibung: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Waterhouse, Peter M -- Fusaro, Adriana F -- New York, N.Y. -- Science. 2006 Jul 7;313(5783):54-5.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉CSIRO Plant Industry, Canberra, ACT 2601, Australia. peter.waterhouse@csiro.au〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/16825558" target="_blank"〉PubMed〈/a〉
    Schlagwort(e): Arabidopsis/*enzymology/genetics/metabolism/*virology ; Arabidopsis Proteins/antagonists & inhibitors/genetics/*metabolism ; Carmovirus/physiology ; Cell Cycle Proteins/antagonists & inhibitors/genetics/*metabolism ; MicroRNAs/metabolism ; Mutation ; Plant Viruses/*physiology ; RNA Interference ; RNA Viruses/physiology ; RNA, Double-Stranded/metabolism ; RNA, Plant/metabolism ; RNA, Small Interfering/*metabolism ; RNA, Viral/*metabolism ; RNA-Induced Silencing Complex/metabolism ; Ribonuclease III/antagonists & inhibitors/genetics/*metabolism ; Ribonucleases/antagonists & inhibitors/genetics/*metabolism ; Viral Proteins/genetics/*metabolism
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    Thema: Biologie , Chemie und Pharmazie , Informatik , Medizin , Allgemeine Naturwissenschaft , Physik
    Publiziert von American Association for the Advancement of Science (AAAS)
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  • 75
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    Structure and receptor specificity of the hemagglutinin from an H5N1 influenza virus (2006)
    American Association for the Advancement of Science (AAAS)
    Details
    Publikationsdatum: 2006-03-18
    Beschreibung: The hemagglutinin (HA) structure at 2.9 angstrom resolution, from a highly pathogenic Vietnamese H5N1 influenza virus, is more related to the 1918 and other human H1 HAs than to a 1997 duck H5 HA. Glycan microarray analysis of this Viet04 HA reveals an avian alpha2-3 sialic acid receptor binding preference. Introduction of mutations that can convert H1 serotype HAs to human alpha2-6 receptor specificity only enhanced or reduced affinity for avian-type receptors. However, mutations that can convert avian H2 and H3 HAs to human receptor specificity, when inserted onto the Viet04 H5 HA framework, permitted binding to a natural human alpha2-6 glycan, which suggests a path for this H5N1 virus to gain a foothold in the human population.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Stevens, James -- Blixt, Ola -- Tumpey, Terrence M -- Taubenberger, Jeffery K -- Paulson, James C -- Wilson, Ian A -- AI058113/AI/NIAID NIH HHS/ -- AI42266/AI/NIAID NIH HHS/ -- CA55896/CA/NCI NIH HHS/ -- GM060938/GM/NIGMS NIH HHS/ -- GM062116/GM/NIGMS NIH HHS/ -- New York, N.Y. -- Science. 2006 Apr 21;312(5772):404-10. Epub 2006 Mar 16.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Molecular Biology, Scripps Research Institute, 10550 North Torrey Pines Road, La Jolla, CA 92037, USA. jstevens@scripps.edu〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/16543414" target="_blank"〉PubMed〈/a〉
    Schlagwort(e): Amino Acid Sequence ; Amino Acid Substitution ; Animals ; Antigenic Variation ; Binding Sites ; Birds ; Carbohydrate Conformation ; Cloning, Molecular ; Crystallography, X-Ray ; Glycosylation ; Hemagglutinin Glycoproteins, Influenza ; Virus/*chemistry/genetics/immunology/*metabolism ; Humans ; Influenza A Virus, H5N1 Subtype/*chemistry/genetics/metabolism/*pathogenicity ; Lung/virology ; Models, Molecular ; Molecular Sequence Data ; Mutation ; Polysaccharides/metabolism ; Protein Conformation ; Protein Folding ; Protein Structure, Tertiary ; Receptors, Virus/chemistry/*metabolism ; Respiratory Mucosa/virology ; Sialic Acids/chemistry/metabolism ; Species Specificity ; Virulence
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    Thema: Biologie , Chemie und Pharmazie , Informatik , Medizin , Allgemeine Naturwissenschaft , Physik
    Publiziert von American Association for the Advancement of Science (AAAS)
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  • 76
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    Onset and progression in inherited ALS determined by motor neurons and microglia (2006)
    American Association for the Advancement of Science (AAAS)
    Details
    Publikationsdatum: 2006-06-03
    Beschreibung: Dominant mutations in superoxide dismutase cause amyotrophic lateral sclerosis (ALS), a progressive paralytic disease characterized by loss of motor neurons. With the use of mice carrying a deletable mutant gene, expression within motor neurons was shown to be a primary determinant of disease onset and of an early phase of disease progression. Diminishing the mutant levels in microglia had little effect on the early disease phase but sharply slowed later disease progression. Onset and progression thus represent distinct disease phases defined by mutant action within different cell types to generate non-cell-autonomous killing of motor neurons; these findings validate therapies, including cell replacement, targeted to the non-neuronal cells.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Boillee, Severine -- Yamanaka, Koji -- Lobsiger, Christian S -- Copeland, Neal G -- Jenkins, Nancy A -- Kassiotis, George -- Kollias, George -- Cleveland, Don W -- MC_U117581330/Medical Research Council/United Kingdom -- NS 27036/NS/NINDS NIH HHS/ -- R37 NS027036/NS/NINDS NIH HHS/ -- New York, N.Y. -- Science. 2006 Jun 2;312(5778):1389-92.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Ludwig Institute for Cancer Research and Departments of Medicine and Neuroscience, University of California at San Diego, 9500 Gilman Drive, La Jolla, CA 92093, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/16741123" target="_blank"〉PubMed〈/a〉
    Schlagwort(e): Amyotrophic Lateral Sclerosis/*enzymology/genetics/pathology/physiopathology ; Animals ; Antigens, CD11b/genetics ; Disease Progression ; Female ; Humans ; Integrases/genetics ; Male ; Mice ; Mice, Inbred C57BL ; Mice, Transgenic ; Microglia/*metabolism ; Motor Neurons/*metabolism ; Mutation ; Superoxide Dismutase/genetics/*metabolism
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    Thema: Biologie , Chemie und Pharmazie , Informatik , Medizin , Allgemeine Naturwissenschaft , Physik
    Publiziert von American Association for the Advancement of Science (AAAS)
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  • 77
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    Zebrafish MiR-430 promotes deadenylation and clearance of maternal mRNAs (2006)
    American Association for the Advancement of Science (AAAS)
    Details
    Publikationsdatum: 2006-02-18
    Beschreibung: MicroRNAs (miRNAs) comprise 1 to 3% of all vertebrate genes, but their in vivo functions and mechanisms of action remain largely unknown. Zebrafish miR-430 is expressed at the onset of zygotic transcription and regulates morphogenesis during early development. By using a microarray approach and in vivo target validation, we find that miR-430 directly regulates several hundred target messenger RNA molecules (mRNAs). Most targets are maternally expressed mRNAs that accumulate in the absence of miR-430. We also show that miR-430 accelerates the deadenylation of target mRNAs. These results suggest that miR-430 facilitates the deadenylation and clearance of maternal mRNAs during early embryogenesis.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Giraldez, Antonio J -- Mishima, Yuichiro -- Rihel, Jason -- Grocock, Russell J -- Van Dongen, Stijn -- Inoue, Kunio -- Enright, Anton J -- Schier, Alexander F -- New York, N.Y. -- Science. 2006 Apr 7;312(5770):75-9. Epub 2006 Feb 16.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Developmental Genetics Program, Skirball Institute of Biomolecular Medicine, and Department of Cell Biology, New York University School of Medicine, New York, NY 10016, USA. giraldez@mcb.harvard.edu〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/16484454" target="_blank"〉PubMed〈/a〉
    Schlagwort(e): 3' Untranslated Regions ; Adenosine/*metabolism ; Animals ; Embryo, Nonmammalian/*physiology ; *Embryonic Development ; Female ; Gene Expression Profiling ; *Gene Expression Regulation, Developmental ; Genes, Reporter ; Green Fluorescent Proteins/genetics/metabolism ; MicroRNAs/*physiology ; Mutation ; Oligonucleotide Array Sequence Analysis ; Polymers/*metabolism ; Protein Biosynthesis ; RNA Stability ; RNA, Messenger/genetics/*metabolism ; Ribonuclease III/genetics/metabolism ; Transcription, Genetic ; Up-Regulation ; Zebrafish/embryology ; Zygote/physiology
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    Thema: Biologie , Chemie und Pharmazie , Informatik , Medizin , Allgemeine Naturwissenschaft , Physik
    Publiziert von American Association for the Advancement of Science (AAAS)
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  • 78
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    Dynamic nuclear actin assembly by Arp2/3 complex and a baculovirus WASP-like protein (2006)
    American Association for the Advancement of Science (AAAS)
    Details
    Publikationsdatum: 2006-10-21
    Beschreibung: Diverse bacterial and viral pathogens induce actin polymerization in the cytoplasm of host cells to facilitate infection. Here, we describe a pathogenic mechanism for promoting dynamic actin assembly in the nucleus to enable viral replication. The baculovirus Autographa californica multiple nucleopolyhedrovirus induced nuclear actin polymerization by translocating the host actin-nucleating Arp2/3 complex into the nucleus, where it was activated by p78/83, a viral Wiskott-Aldrich syndrome protein (WASP)-like protein. Nuclear actin assembly by p78/83 and Arp2/3 complex was essential for viral progeny production. Recompartmentalizing dynamic host actin may represent a conserved mode of pathogenesis and reflect viral manipulation of normal functions of nuclear actin.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Goley, Erin D -- Ohkawa, Taro -- Mancuso, Joel -- Woodruff, Jeffrey B -- D'Alessio, Joseph A -- Cande, W Zacheus -- Volkman, Loy E -- Welch, Matthew D -- AI054693/AI/NIAID NIH HHS/ -- GM59609/GM/NIGMS NIH HHS/ -- R01 GM059609/GM/NIGMS NIH HHS/ -- R01 GM059609-07/GM/NIGMS NIH HHS/ -- New York, N.Y. -- Science. 2006 Oct 20;314(5798):464-7.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Molecular and Cell Biology, University of California, Berkeley, CA 94720, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/17053146" target="_blank"〉PubMed〈/a〉
    Schlagwort(e): Actin-Related Protein 2-3 Complex/*metabolism ; Actins/*metabolism ; Animals ; Biopolymers/metabolism ; Cell Line ; Cell Nucleus/*metabolism ; Fluorescence Recovery After Photobleaching ; Moths ; Mutation ; Nucleocapsid/metabolism/ultrastructure ; Nucleopolyhedrovirus/genetics/*physiology ; Transfection ; Viral Proteins/chemistry/genetics/isolation & purification/*metabolism ; Virion/ultrastructure ; Virus Replication ; Wiskott-Aldrich Syndrome Protein/chemistry
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    Thema: Biologie , Chemie und Pharmazie , Informatik , Medizin , Allgemeine Naturwissenschaft , Physik
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  • 79
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    Methylation of tRNAAsp by the DNA methyltransferase homolog Dnmt2 (2006)
    American Association for the Advancement of Science (AAAS)
    Details
    Publikationsdatum: 2006-01-21
    Beschreibung: The sequence and the structure of DNA methyltransferase-2 (Dnmt2) bear close affinities to authentic DNA cytosine methyltransferases. A combined genetic and biochemical approach revealed that human DNMT2 did not methylate DNA but instead methylated a small RNA; mass spectrometry showed that this RNA is aspartic acid transfer RNA (tRNA(Asp)) and that DNMT2 specifically methylated cytosine 38 in the anticodon loop. The function of DNMT2 is highly conserved, and human DNMT2 protein restored methylation in vitro to tRNA(Asp) from Dnmt2-deficient strains of mouse, Arabidopsis thaliana, and Drosophila melanogaster in a manner that was dependent on preexisting patterns of modified nucleosides. Indirect sequence recognition is also a feature of eukaryotic DNA methyltransferases, which may have arisen from a Dnmt2-like RNA methyltransferase.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Goll, Mary Grace -- Kirpekar, Finn -- Maggert, Keith A -- Yoder, Jeffrey A -- Hsieh, Chih-Lin -- Zhang, Xiaoyu -- Golic, Kent G -- Jacobsen, Steven E -- Bestor, Timothy H -- New York, N.Y. -- Science. 2006 Jan 20;311(5759):395-8.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Genetics and Development, College of Physicians and Surgeons, Columbia University, New York, NY 10032, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/16424344" target="_blank"〉PubMed〈/a〉
    Schlagwort(e): Animals ; Anticodon ; Arabidopsis/genetics/physiology ; Arabidopsis Proteins/genetics ; Catalytic Domain ; Cytosine/metabolism ; DNA (Cytosine-5-)-Methyltransferase/chemistry/genetics/*metabolism ; Drosophila Proteins/genetics ; Drosophila melanogaster/genetics/physiology ; Evolution, Molecular ; Humans ; Mass Spectrometry ; Methylation ; Mice ; Mutation ; NIH 3T3 Cells ; RNA, Plant/metabolism ; RNA, Transfer, Asp/chemistry/*metabolism ; Transfection
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    Thema: Biologie , Chemie und Pharmazie , Informatik , Medizin , Allgemeine Naturwissenschaft , Physik
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  • 80
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    Cell signaling. A sophisticated scaffold wields a new trick (2006)
    American Association for the Advancement of Science (AAAS)
    Details
    Publikationsdatum: 2006-02-14
    Beschreibung: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Breitkreutz, Ashton -- Tyers, Mike -- New York, N.Y. -- Science. 2006 Feb 10;311(5762):789-90.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Campbell Family Institute for Breast Cancer Research, Toronto Medical Discovery Tower, Toronto, Canada M5G 1L7. abreitkr@uhnres.utoronto.ca〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/16469909" target="_blank"〉PubMed〈/a〉
    Schlagwort(e): Adaptor Proteins, Signal Transducing/chemistry/genetics/*metabolism ; Binding Sites ; *MAP Kinase Signaling System ; Mitogen-Activated Protein Kinase Kinases ; Mitogen-Activated Protein Kinases/chemistry/*metabolism ; Models, Biological ; Mutation ; Pheromones/physiology ; Phosphorylation ; Protein Binding ; Protein Conformation ; Protein Kinases/metabolism ; Saccharomyces cerevisiae/genetics/*metabolism ; Saccharomyces cerevisiae Proteins/chemistry/genetics/*metabolism ; Tyrosine/metabolism
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    Thema: Biologie , Chemie und Pharmazie , Informatik , Medizin , Allgemeine Naturwissenschaft , Physik
    Publiziert von American Association for the Advancement of Science (AAAS)
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  • 81
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    Sampling the antibiotic resistome (2006)
    American Association for the Advancement of Science (AAAS)
    Details
    Publikationsdatum: 2006-01-21
    Beschreibung: Microbial resistance to antibiotics currently spans all known classes of natural and synthetic compounds. It has not only hindered our treatment of infections but also dramatically reshaped drug discovery, yet its origins have not been systematically studied. Soil-dwelling bacteria produce and encounter a myriad of antibiotics, evolving corresponding sensing and evading strategies. They are a reservoir of resistance determinants that can be mobilized into the microbial community. Study of this reservoir could provide an early warning system for future clinically relevant antibiotic resistance mechanisms.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉D'Costa, Vanessa M -- McGrann, Katherine M -- Hughes, Donald W -- Wright, Gerard D -- New York, N.Y. -- Science. 2006 Jan 20;311(5759):374-7.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Antimicrobial Research Centre, Department of Biochemistry and Biomedical Sciences, McMaster University, Ontario, Canada, L8N 3Z5.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/16424339" target="_blank"〉PubMed〈/a〉
    Schlagwort(e): Amino Acid Substitution ; Anti-Bacterial Agents/metabolism/*pharmacology ; Ciprofloxacin/pharmacology ; Daptomycin/metabolism/pharmacology ; *Drug Resistance, Multiple, Bacterial/genetics ; Erythromycin/metabolism/pharmacology ; Genes, Bacterial ; Ketolides/metabolism/pharmacology ; Macrolides/pharmacology ; Microbial Sensitivity Tests ; Molecular Sequence Data ; Mutation ; Rifampin/metabolism/pharmacology ; *Soil Microbiology ; Streptomyces/*drug effects/enzymology/genetics/isolation & purification ; Trimethoprim Resistance ; Vancomycin Resistance/genetics ; Virginiamycin/metabolism/pharmacology
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    Thema: Biologie , Chemie und Pharmazie , Informatik , Medizin , Allgemeine Naturwissenschaft , Physik
    Publiziert von American Association for the Advancement of Science (AAAS)
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  • 82
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    Genome-wide detection of polymorphisms at nucleotide resolution with a single DNA microarray (2006)
    American Association for the Advancement of Science (AAAS)
    Details
    Publikationsdatum: 2006-03-11
    Beschreibung: A central challenge of genomics is to detect, simply and inexpensively, all differences in sequence among the genomes of individual members of a species. We devised a system to detect all single-nucleotide differences between genomes with the use of data from a single hybridization to a whole-genome DNA microarray. This allowed us to detect a variety of spontaneous single-base pair substitutions, insertions, and deletions, and most (〉90%) of the approximately 30,000 known single-nucleotide polymorphisms between two Saccharomyces cerevisiae strains. We applied this approach to elucidate the genetic basis of phenotypic variants and to identify the small number of single-base pair changes accumulated during experimental evolution of yeast.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Gresham, David -- Ruderfer, Douglas M -- Pratt, Stephen C -- Schacherer, Joseph -- Dunham, Maitreya J -- Botstein, David -- Kruglyak, Leonid -- P50 GM071508/GM/NIGMS NIH HHS/ -- R01 GM046406/GM/NIGMS NIH HHS/ -- R37 MH059520/MH/NIMH NIH HHS/ -- New York, N.Y. -- Science. 2006 Mar 31;311(5769):1932-6. Epub 2006 Mar 9.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Lewis-Sigler Institute for Integrative Genomics, Princeton University, Princeton, NJ 08544, USA. dgresham@genomics.princeton.edu〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/16527929" target="_blank"〉PubMed〈/a〉
    Schlagwort(e): Directed Molecular Evolution ; Genes, Fungal ; *Genome, Fungal ; Genomics ; Mutation ; Nucleic Acid Hybridization ; *Oligonucleotide Array Sequence Analysis ; Phenotype ; Point Mutation ; *Polymorphism, Single Nucleotide ; Saccharomyces cerevisiae/*genetics/physiology ; Sequence Deletion ; Suppression, Genetic
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    Thema: Biologie , Chemie und Pharmazie , Informatik , Medizin , Allgemeine Naturwissenschaft , Physik
    Publiziert von American Association for the Advancement of Science (AAAS)
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    Crystal structure of the low-pH form of the vesicular stomatitis virus glycoprotein G (2006)
    American Association for the Advancement of Science (AAAS)
    Details
    Publikationsdatum: 2006-07-15
    Beschreibung: The vesicular stomatitis virus has an atypical membrane fusion glycoprotein (G) exhibiting a pH-dependent equilibrium between two forms at the virus surface. Membrane fusion is triggered during the transition from the high- to low-pH form. The structure of G in its low-pH form shows the classic hairpin conformation observed in all other fusion proteins in their postfusion conformation, in spite of a novel fold combining features of fusion proteins from classes I and II. The structure provides a framework for understanding the reversibility of the G conformational change. Unexpectedly, G is homologous to gB of herpesviruses, which raises important questions on viral evolution.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Roche, Stephane -- Bressanelli, Stephane -- Rey, Felix A -- Gaudin, Yves -- New York, N.Y. -- Science. 2006 Jul 14;313(5784):187-91.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉CNRS, Unite Mixte de Recherche (UMR) 2472, Institut Federatif de Recherche (IFR) 115, Virologie Moleculaire et Structurale, 91198, Gif sur Yvette, France.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/16840692" target="_blank"〉PubMed〈/a〉
    Schlagwort(e): Amino Acid Sequence ; Crystallization ; Crystallography, X-Ray ; Evolution, Molecular ; Hydrogen-Ion Concentration ; Membrane Glycoproteins/*chemistry/genetics/metabolism ; Models, Molecular ; Molecular Sequence Data ; Mutation ; Protein Conformation ; Protein Folding ; Protein Structure, Quaternary ; Protein Structure, Secondary ; Protein Structure, Tertiary ; Protein Subunits/chemistry ; Vesicular stomatitis Indiana virus/*chemistry ; Viral Envelope Proteins/*chemistry/genetics/metabolism ; Viral Fusion Proteins/*chemistry/genetics/metabolism
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    Thema: Biologie , Chemie und Pharmazie , Informatik , Medizin , Allgemeine Naturwissenschaft , Physik
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  • 84
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    Hierarchical action and inhibition of plant Dicer-like proteins in antiviral defense (2006)
    American Association for the Advancement of Science (AAAS)
    Details
    Publikationsdatum: 2006-06-03
    Beschreibung: The mechanisms underlying induction and suppression of RNA silencing in the ongoing plant-virus arms race are poorly understood. We show here that virus-derived small RNAs produced by Arabidopsis Dicer-like 4 (DCL4) program an effector complex conferring antiviral immunity. Inhibition of DCL4 by a viral-encoded suppressor revealed the subordinate antiviral activity of DCL2. Accordingly, inactivating both DCL2 and DCL4 was necessary and sufficient to restore systemic infection of a suppressor-deficient virus. The effects of DCL2 were overcome by increasing viral dosage in inoculated leaves, but this could not surmount additional, non-cell autonomous effects of DCL4 specifically preventing viral unloading from the vasculature. These findings define a molecular framework for studying antiviral silencing and defense in plants.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Deleris, Angelique -- Gallego-Bartolome, Javier -- Bao, Jinsong -- Kasschau, Kristin D -- Carrington, James C -- Voinnet, Olivier -- AI43288/AI/NIAID NIH HHS/ -- New York, N.Y. -- Science. 2006 Jul 7;313(5783):68-71. Epub 2006 Jun 1.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Institut de Biologie Moleculaire des Plantes, CNRS Unite Propre de Recherche (UPR) 2357, 12, rue du General Zimmer, 67084 Strasbourg Cedex, France.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/16741077" target="_blank"〉PubMed〈/a〉
    Schlagwort(e): Arabidopsis/enzymology/genetics/metabolism/*virology ; Arabidopsis Proteins/antagonists & inhibitors/genetics/*metabolism ; Carmovirus/physiology ; Cell Cycle Proteins/antagonists & inhibitors/genetics/*metabolism ; Green Fluorescent Proteins/metabolism ; Mutation ; Plant Diseases/virology ; Plant Leaves/virology ; Plant Viruses/*physiology ; Plants, Genetically Modified ; *RNA Interference ; RNA Viruses/physiology ; RNA, Double-Stranded/metabolism ; RNA, Small Interfering/*metabolism ; RNA, Viral/*metabolism ; RNA-Induced Silencing Complex/metabolism ; Recombinant Fusion Proteins/metabolism ; Ribonuclease III/antagonists & inhibitors/genetics/*metabolism ; Ribonucleases/antagonists & inhibitors/genetics/*metabolism ; Signal Transduction ; Viral Proteins/*metabolism
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    Thema: Biologie , Chemie und Pharmazie , Informatik , Medizin , Allgemeine Naturwissenschaft , Physik
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  • 85
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    Transient homologous chromosome pairing marks the onset of X inactivation (2006)
    American Association for the Advancement of Science (AAAS)
    Details
    Publikationsdatum: 2006-01-21
    Beschreibung: Mammalian X inactivation turns off one female X chromosome to enact dosage compensation between XX and XY individuals. X inactivation is known to be regulated in cis by Xite, Tsix, and Xist, but in principle the two Xs must also be regulated in trans to ensure mutually exclusive silencing. Here, we demonstrate that interchromosomal pairing mediates this communication. Pairing occurs transiently at the onset of X inactivation and is specific to the X-inactivation center. Deleting Xite and Tsix perturbs pairing and counting/choice, whereas their autosomal insertion induces de novo X-autosome pairing. Ectopic X-autosome interactions inhibit endogenous X-X pairing and block the initiation of X-chromosome inactivation. Thus, Tsix and Xite function both in cis and in trans. We propose that Tsix and Xite regulate counting and mutually exclusive choice through X-X pairing.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Xu, Na -- Tsai, Chia-Lun -- Lee, Jeannie T -- New York, N.Y. -- Science. 2006 Feb 24;311(5764):1149-52. Epub 2006 Jan 19.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Howard Hughes Medical Institute, Department of Molecular Biology, Massachusetts General Hospital, Department of Genetics, Harvard Medical School Boston, MA 02114, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/16424298" target="_blank"〉PubMed〈/a〉
    Schlagwort(e): Animals ; Cell Differentiation ; Cell Line ; *Chromosome Pairing ; Female ; In Situ Hybridization, Fluorescence ; Male ; Mice ; Mice, Transgenic ; Models, Genetic ; Mutation ; RNA, Long Noncoding ; RNA, Untranslated/genetics/metabolism ; Regulatory Elements, Transcriptional ; Stem Cells ; Transgenes ; X Chromosome/genetics/*physiology ; *X Chromosome Inactivation
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    Thema: Biologie , Chemie und Pharmazie , Informatik , Medizin , Allgemeine Naturwissenschaft , Physik
    Publiziert von American Association for the Advancement of Science (AAAS)
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  • 86
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    AXR4 is required for localization of the auxin influx facilitator AUX1 (2006)
    American Association for the Advancement of Science (AAAS)
    Details
    Publikationsdatum: 2006-05-13
    Beschreibung: The AUX1 and PIN auxin influx and efflux facilitators are key regulators of root growth and development. For root gravitropism to occur, AUX1 and PIN2 must transport auxin via the lateral root cap to elongating epidermal cells. Genetic studies suggest that AXR4 functions in the same pathway as AUX1. Here we show that AXR4 is a previously unidentified accessory protein of the endoplasmic reticulum (ER) that regulates localization of AUX1 but not of PIN proteins. Loss of AXR4 resulted in abnormal accumulation of AUX1 in the ER of epidermal cells, indicating that the axr4 agravitropic phenotype is caused by defective AUX1 trafficking in the root epidermis.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Dharmasiri, S -- Swarup, R -- Mockaitis, K -- Dharmasiri, N -- Singh, S K -- Kowalchyk, M -- Marchant, A -- Mills, S -- Sandberg, G -- Bennett, M J -- Estelle, M -- New York, N.Y. -- Science. 2006 May 26;312(5777):1218-20. Epub 2006 May 11.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Biology, Indiana University, Bloomington, IN 47405, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/16690816" target="_blank"〉PubMed〈/a〉
    Schlagwort(e): 2,4-Dichlorophenoxyacetic Acid/pharmacology ; Amino Acid Sequence ; Arabidopsis/drug effects/*genetics/*metabolism ; Arabidopsis Proteins/chemistry/*genetics/*metabolism ; Biological Transport ; Carrier Proteins/chemistry/*genetics/*metabolism ; Cell Membrane/metabolism ; Endoplasmic Reticulum/metabolism ; Gravitropism ; Herbicides/pharmacology ; Indoleacetic Acids/metabolism ; Membrane Transport Proteins/metabolism ; Molecular Sequence Data ; Mutation ; Oligonucleotide Array Sequence Analysis ; Phenotype ; Plant Epidermis/cytology/metabolism ; Plant Root Cap/cytology/metabolism ; Plant Roots/*metabolism ; Plants, Genetically Modified ; Protein Transport ; Recombinant Fusion Proteins/metabolism
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    Thema: Biologie , Chemie und Pharmazie , Informatik , Medizin , Allgemeine Naturwissenschaft , Physik
    Publiziert von American Association for the Advancement of Science (AAAS)
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  • 87
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    Nuclear gene indicates coat-color polymorphism in mammoths (2006)
    American Association for the Advancement of Science (AAAS)
    Details
    Publikationsdatum: 2006-07-11
    Beschreibung: By amplifying the melanocortin type 1 receptor from the woolly mammoth, we can report the complete nucleotide sequence of a nuclear-encoded gene from an extinct species. We found two alleles and show that one allele produces a functional protein whereas the other one encodes a protein with strongly reduced activity. This finding suggests that mammoths may have been polymorphic in coat color, with both dark- and light-haired individuals co-occurring.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Rompler, Holger -- Rohland, Nadin -- Lalueza-Fox, Carles -- Willerslev, Eske -- Kuznetsova, Tatyana -- Rabeder, Gernot -- Bertranpetit, Jaume -- Schoneberg, Torsten -- Hofreiter, Michael -- New York, N.Y. -- Science. 2006 Jul 7;313(5783):62.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Molecular Biochemistry, Institute of Biochemistry, Medical Faculty, University of Leipzig, 04103 Leipzig, Germany.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/16825562" target="_blank"〉PubMed〈/a〉
    Schlagwort(e): Alleles ; Amino Acid Substitution ; Animals ; Cell Nucleus/genetics ; Elephants/*genetics ; Genotype ; *Hair ; Hair Color/*genetics ; Molecular Sequence Data ; Mutation ; Phenotype ; Pigmentation/*genetics ; Polymerase Chain Reaction ; *Polymorphism, Genetic ; Polymorphism, Single Nucleotide ; Receptor, Melanocortin, Type 1/chemistry/*genetics ; Transfection ; alpha-MSH/analogs & derivatives/metabolism
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    Thema: Biologie , Chemie und Pharmazie , Informatik , Medizin , Allgemeine Naturwissenschaft , Physik
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  • 88
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    Comment on "Transitions to asexuality result in excess amino acid substitutions" (2006)
    American Association for the Advancement of Science (AAAS)
    Details
    Publikationsdatum: 2006-09-09
    Beschreibung: Paland and Lynch (Reports, 17 February 2006, p. 990) showed that in Daphnia pulex, the ratio of amino acid replacement to silent substitution in mitochondrial genes is higher in asexual lineages than in sexual lineages. If this base-composition bias is maintained by selection, it too should alter following transitions in reproductive mode. Analysis reveals no such change in the genomes of D. pulex.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Butlin, Roger -- New York, N.Y. -- Science. 2006 Sep 8;313(5792):1389; author reply 1389.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Animal and Plant Sciences, University of Sheffield, Western Bank, Sheffield S10 2TN, UK. r.k.butlin@sheffield.ac.uk〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/16959991" target="_blank"〉PubMed〈/a〉
    Schlagwort(e): *Amino Acid Substitution ; Animals ; Base Composition ; DNA, Mitochondrial/*genetics ; Daphnia/*genetics/*physiology ; Female ; Genes, Mitochondrial ; Male ; Mutation ; *Reproduction, Asexual ; *Selection, Genetic
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    Thema: Biologie , Chemie und Pharmazie , Informatik , Medizin , Allgemeine Naturwissenschaft , Physik
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  • 89
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    Evolution. Why sex? (2006)
    American Association for the Advancement of Science (AAAS)
    Details
    Publikationsdatum: 2006-02-18
    Beschreibung: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Nielsen, Rasmus -- New York, N.Y. -- Science. 2006 Feb 17;311(5763):960-1.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Center for Bioinformatics and Department of Biology, University of Copenhagen, Universitetsparken 15, 2100 Kbh O Denmark. rasmus@binf.ku.dk〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/16484481" target="_blank"〉PubMed〈/a〉
    Schlagwort(e): Animals ; Daphnia/*genetics/*physiology ; Female ; Male ; Mutation ; Parthenogenesis ; *Recombination, Genetic ; *Selection, Genetic ; *Sex
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    Thema: Biologie , Chemie und Pharmazie , Informatik , Medizin , Allgemeine Naturwissenschaft , Physik
    Publiziert von American Association for the Advancement of Science (AAAS)
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  • 90
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    Long-term transmission of defective RNA viruses in humans and Aedes mosquitoes (2006)
    American Association for the Advancement of Science (AAAS)
    Details
    Publikationsdatum: 2006-01-18
    Beschreibung: In 2001, dengue virus type 1 (DENV-1) populations in humans and mosquitoes from Myanmar acquired a stop-codon mutation in the surface envelope (E) protein gene. Within a year, this stop-codon strain had spread to all individuals sampled. The presence of truncated E protein species within individual viral populations, along with a general relaxation in selective constraint, indicated that the stop-codon strain represents a defective lineage of DENV-1. We propose that such long-term transmission of defective RNA viruses in nature was achieved through complementation by coinfection of host cells with functional viruses.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Aaskov, John -- Buzacott, Katie -- Thu, Hlaing Myat -- Lowry, Kym -- Holmes, Edward C -- New York, N.Y. -- Science. 2006 Jan 13;311(5758):236-8.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉School of Life Sciences, Queensland University of Technology, 2 George Street, Brisbane, 4001, Australia.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/16410525" target="_blank"〉PubMed〈/a〉
    Schlagwort(e): Aedes/*virology ; Animals ; Codon, Terminator ; Defective Viruses/genetics/*physiology ; Dengue/transmission/*virology ; Dengue Virus/genetics/*physiology ; Evolution, Molecular ; Humans ; Mutation ; Myanmar ; Viral Envelope Proteins/*genetics
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    Thema: Biologie , Chemie und Pharmazie , Informatik , Medizin , Allgemeine Naturwissenschaft , Physik
    Publiziert von American Association for the Advancement of Science (AAAS)
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  • 91
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    TOPLESS regulates apical embryonic fate in Arabidopsis (2006)
    American Association for the Advancement of Science (AAAS)
    Details
    Publikationsdatum: 2006-06-10
    Beschreibung: The embryos of seed plants develop with an apical shoot pole and a basal root pole. In Arabidopsis, the topless-1 (tpl-1) mutation transforms the shoot pole into a second root pole. Here, we show that TPL resembles known transcriptional corepressors and that tpl-1 acts as a dominant negative mutation for multiple TPL-related proteins. Mutations in the putative coactivator HISTONE ACETYLTRANSFERASE GNAT SUPERFAMILY1 suppress the tpl-1 phenotype. Mutations in HISTONE DEACETYLASE19, a putative corepressor, increase the penetrance of tpl-1 and display similar apical defects. These data point to a transcriptional repression mechanism that prevents root formation in the shoot pole during Arabidopsis embryogenesis.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Long, Jeff A -- Ohno, Carolyn -- Smith, Zachery R -- Meyerowitz, Elliot M -- GM072764/GM/NIGMS NIH HHS/ -- GM45697/GM/NIGMS NIH HHS/ -- R01 GM072764/GM/NIGMS NIH HHS/ -- New York, N.Y. -- Science. 2006 Jun 9;312(5779):1520-3.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Plant Biology Laboratory, Salk Institute for Biological Sciences, 10010 North Torrey Pines Road, La Jolla, CA 92037, USA. long@salk.edu〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/16763149" target="_blank"〉PubMed〈/a〉
    Schlagwort(e): Alleles ; Arabidopsis/*embryology/genetics ; Arabidopsis Proteins/genetics/*physiology ; Cell Polarity ; Chromosome Mapping ; Chromosomes, Plant ; Gene Expression Regulation, Plant ; Histone Deacetylases/genetics/physiology ; Mutation ; Plant Roots/embryology ; Plant Shoots/embryology ; Repressor Proteins/genetics/*physiology ; Seeds
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    Thema: Biologie , Chemie und Pharmazie , Informatik , Medizin , Allgemeine Naturwissenschaft , Physik
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  • 92
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    Evolution. Reducible complexity (2006)
    American Association for the Advancement of Science (AAAS)
    Details
    Publikationsdatum: 2006-04-08
    Beschreibung: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Adami, Christoph -- New York, N.Y. -- Science. 2006 Apr 7;312(5770):61-3.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Keck Graduate Institute of Applied Life Sciences, Claremont, CA 91711, USA. adami@kgi.edu〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/16601180" target="_blank"〉PubMed〈/a〉
    Schlagwort(e): Aldosterone/*metabolism ; Amino Acid Substitution ; Animals ; Desoxycorticosterone/metabolism ; Epistasis, Genetic ; *Evolution, Molecular ; Gene Duplication ; Hydrocortisone/metabolism ; Ligands ; Mutation ; Phylogeny ; Receptors, Glucocorticoid/chemistry/genetics/metabolism ; Receptors, Mineralocorticoid/chemistry/*genetics/*metabolism ; Receptors, Steroid/chemistry/genetics/*metabolism
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    Thema: Biologie , Chemie und Pharmazie , Informatik , Medizin , Allgemeine Naturwissenschaft , Physik
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  • 93
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    Microbiology. Timing the sexual development of parasites (2006)
    American Association for the Advancement of Science (AAAS)
    Details
    Publikationsdatum: 2006-08-05
    Beschreibung: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Hajduk, Stephen L -- New York, N.Y. -- Science. 2006 Aug 4;313(5787):626-7.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Josephine Bay Paul Center, Woods Hole, MA 02543, USA. shajduk@mbl.edu〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/16888130" target="_blank"〉PubMed〈/a〉
    Schlagwort(e): Animals ; *Gene Expression Regulation, Developmental ; Genes, Protozoan ; Mutation ; Oligonucleotide Array Sequence Analysis ; Plasmodium/*genetics/*growth & development/physiology ; *Protein Biosynthesis ; Protozoan Proteins/*metabolism ; RNA Helicases/genetics/*metabolism ; RNA, Messenger, Stored/*metabolism ; RNA, Protozoan/metabolism ; Recombinant Fusion Proteins/metabolism ; Ribonucleoproteins/metabolism
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    Thema: Biologie , Chemie und Pharmazie , Informatik , Medizin , Allgemeine Naturwissenschaft , Physik
    Publiziert von American Association for the Advancement of Science (AAAS)
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  • 94
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    Multiple phosphorylation sites confer reproducibility of the rod's single-photon responses (2006)
    American Association for the Advancement of Science (AAAS)
    Details
    Publikationsdatum: 2006-07-29
    Beschreibung: Although signals controlled by single molecules are expected to be inherently variable, rod photoreceptors generate reproducible responses to single absorbed photons. We show that this unexpected reproducibility-the consistency of amplitude and duration of rhodopsin activity-varies in a graded and systematic manner with the number but not the identity of phosphorylation sites on rhodopsin's C terminus. These results indicate that each phosphorylation site provides an independent step in rhodopsin deactivation and that collectively these steps tightly control rhodopsin's active lifetime. Other G protein cascades may exploit a similar mechanism to encode accurately the timing and number of receptor activation.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Doan, Thuy -- Mendez, Ana -- Detwiler, Peter B -- Chen, Jeannie -- Rieke, Fred -- EY-02048/EY/NEI NIH HHS/ -- EY-11850/EY/NEI NIH HHS/ -- EY-12155/EY/NEI NIH HHS/ -- T32EY-07031/EY/NEI NIH HHS/ -- New York, N.Y. -- Science. 2006 Jul 28;313(5786):530-3.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Program in Neurobiology and Behavior, University of Washington, Seattle, WA 98195, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/16873665" target="_blank"〉PubMed〈/a〉
    Schlagwort(e): Animals ; Arrestin/metabolism ; Electrophysiology ; Mice ; Mice, Transgenic ; Models, Biological ; Mutation ; Patch-Clamp Techniques ; Phosphorylation ; *Photons ; Retinal Rod Photoreceptor Cells/*metabolism ; Rhodopsin/genetics/*metabolism ; Vision, Ocular
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    Thema: Biologie , Chemie und Pharmazie , Informatik , Medizin , Allgemeine Naturwissenschaft , Physik
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  • 95
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    Molecular biology. "X"-rated chromosomal rendezvous (2006)
    American Association for the Advancement of Science (AAAS)
    Details
    Publikationsdatum: 2006-02-25
    Beschreibung: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Carrel, Laura -- New York, N.Y. -- Science. 2006 Feb 24;311(5764):1107-9.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Biochemistry and Molecular Biology, Pennsylvania State University College of Medicine, Hershey, PA 17033, USA. lcarrel@psu.edu〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/16497921" target="_blank"〉PubMed〈/a〉
    Schlagwort(e): Animals ; Binding Sites ; Cell Differentiation ; Chromosome Pairing ; Female ; In Situ Hybridization, Fluorescence ; Mice ; Mutation ; RNA, Long Noncoding ; RNA, Untranslated/genetics/metabolism ; Regulatory Elements, Transcriptional ; Stem Cells/cytology/physiology ; Transgenes ; X Chromosome/genetics/*physiology ; *X Chromosome Inactivation
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    Thema: Biologie , Chemie und Pharmazie , Informatik , Medizin , Allgemeine Naturwissenschaft , Physik
    Publiziert von American Association for the Advancement of Science (AAAS)
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  • 96
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    Microtubule-severing activity of Shigella is pivotal for intercellular spreading (2006)
    American Association for the Advancement of Science (AAAS)
    Details
    Publikationsdatum: 2006-11-11
    Beschreibung: Some pathogenic bacteria actually invade the cytoplasm of their target host cells. Invasive bacteria acquire the propulsive force to move by recruiting actin and inducing its polymerization. Here we show that Shigella movement within the cytoplasm was severely hindered by microtubules and that the bacteria destroyed surrounding microtubules by secreting VirA by means of the type III secretion system. Degradation of microtubules by VirA was dependent on its alpha-tubulin-specific cysteine protease-like activity. virA mutants did not move within the host cytoplasm and failed to move into adjacent cells.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Yoshida, Sei -- Handa, Yutaka -- Suzuki, Toshihiko -- Ogawa, Michinaga -- Suzuki, Masato -- Tamai, Asuka -- Abe, Akio -- Katayama, Eisaku -- Sasakawa, Chihiro -- New York, N.Y. -- Science. 2006 Nov 10;314(5801):985-9.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Microbiology and Immunology, International Research Center for Infectious Diseases, Institute of Medical Science, University of Tokyo, 4-6-1, Shirokanedai, Minato-ku, Tokyo 108-8639, Japan.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/17095701" target="_blank"〉PubMed〈/a〉
    Schlagwort(e): Actins/metabolism ; Animals ; COS Cells ; Cercopithecus aethiops ; Cysteine Endopeptidases/*metabolism ; Cytoplasm/*microbiology ; Dysentery, Bacillary/microbiology ; Mice ; Mice, Inbred C57BL ; Microscopy, Fluorescence ; Microtubules/drug effects/*metabolism/ultrastructure ; Movement ; Mutation ; Nocodazole/pharmacology ; Shigella flexneri/enzymology/genetics/*pathogenicity/*physiology ; Tubulin/*metabolism ; Virulence Factors/*metabolism
    Print ISSN: 0036-8075
    Digitale ISSN: 1095-9203
    Thema: Biologie , Chemie und Pharmazie , Informatik , Medizin , Allgemeine Naturwissenschaft , Physik
    Publiziert von American Association for the Advancement of Science (AAAS)
    Standort Signatur Erwartet Verfügbarkeit
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  • 97
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    Polo-like kinase Cdc5 controls the local activation of Rho1 to promote cytokinesis (2006)
    American Association for the Advancement of Science (AAAS)
    Details
    Publikationsdatum: 2006-06-10
    Beschreibung: The links between the cell cycle machinery and the cytoskeletal proteins controlling cytokinesis are poorly understood. The small guanine nucleotide triphosphate (GTP)-binding protein RhoA stimulates type II myosin contractility and formin-dependent assembly of the cytokinetic actin contractile ring. We found that budding yeast Polo-like kinase Cdc5 controls the targeting and activation of Rho1 (RhoA) at the division site via Rho1 guanine nucleotide exchange factors. This role of Cdc5 (Polo-like kinase) in regulating Rho1 is likely to be relevant to cytokinesis and asymmetric cell division in other organisms.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Yoshida, Satoshi -- Kono, Keiko -- Lowery, Drew M -- Bartolini, Sara -- Yaffe, Michael B -- Ohya, Yoshikazu -- Pellman, David -- New York, N.Y. -- Science. 2006 Jul 7;313(5783):108-11. Epub 2006 Jun 8.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Pediatric Oncology, Dana-Farber Cancer Institute and Division of Hematology/Oncology, Children's Hospital Boston and Harvard Medical School, Boston, MA 02115, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/16763112" target="_blank"〉PubMed〈/a〉
    Schlagwort(e): Actins/metabolism ; Amino Acid Motifs ; Anaphase ; Cell Cycle Proteins/chemistry/genetics/*metabolism ; *Cytokinesis ; Guanine Nucleotide Exchange Factors/chemistry/genetics/metabolism ; Guanosine Triphosphate/metabolism ; Microfilament Proteins/metabolism ; Mitosis ; Mutation ; Phosphorylation ; Protein Kinases/chemistry/genetics/*metabolism ; Protein-Serine-Threonine Kinases ; Recombinant Fusion Proteins/metabolism ; Saccharomyces cerevisiae/*cytology/genetics/*metabolism ; Saccharomyces cerevisiae Proteins/chemistry/genetics/*metabolism ; Temperature ; rho GTP-Binding Proteins/*metabolism
    Print ISSN: 0036-8075
    Digitale ISSN: 1095-9203
    Thema: Biologie , Chemie und Pharmazie , Informatik , Medizin , Allgemeine Naturwissenschaft , Physik
    Publiziert von American Association for the Advancement of Science (AAAS)
    Standort Signatur Erwartet Verfügbarkeit
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  • 98
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    Positive natural selection in the human lineage (2006)
    American Association for the Advancement of Science (AAAS)
    Details
    Publikationsdatum: 2006-06-17
    Beschreibung: Positive natural selection is the force that drives the increase in prevalence of advantageous traits, and it has played a central role in our development as a species. Until recently, the study of natural selection in humans has largely been restricted to comparing individual candidate genes to theoretical expectations. The advent of genome-wide sequence and polymorphism data brings fundamental new tools to the study of natural selection. It is now possible to identify new candidates for selection and to reevaluate previous claims by comparison with empirical distributions of DNA sequence variation across the human genome and among populations. The flood of data and analytical methods, however, raises many new challenges. Here, we review approaches to detect positive natural selection, describe results from recent analyses of genome-wide data, and discuss the prospects and challenges ahead as we expand our understanding of the role of natural selection in shaping the human genome.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Sabeti, P C -- Schaffner, S F -- Fry, B -- Lohmueller, J -- Varilly, P -- Shamovsky, O -- Palma, A -- Mikkelsen, T S -- Altshuler, D -- Lander, E S -- New York, N.Y. -- Science. 2006 Jun 16;312(5780):1614-20.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Broad Institute of MIT and Harvard, Cambridge, MA, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/16778047" target="_blank"〉PubMed〈/a〉
    Schlagwort(e): Alleles ; Biological Evolution ; Gene Frequency ; Genetic Variation ; Genetics, Population ; *Genome, Human ; Haplotypes ; Humans ; Mutation ; Polymorphism, Genetic ; *Selection, Genetic ; Sequence Analysis, DNA
    Print ISSN: 0036-8075
    Digitale ISSN: 1095-9203
    Thema: Biologie , Chemie und Pharmazie , Informatik , Medizin , Allgemeine Naturwissenschaft , Physik
    Publiziert von American Association for the Advancement of Science (AAAS)
    Standort Signatur Erwartet Verfügbarkeit
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  • 99
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    Herpes simplex virus encephalitis in human UNC-93B deficiency (2006)
    American Association for the Advancement of Science (AAAS)
    Details
    Publikationsdatum: 2006-09-16
    Beschreibung: Herpes simplex virus-1 (HSV-1) encephalitis (HSE) is the most common form of sporadic viral encephalitis in western countries. Its pathogenesis remains unclear, as it affects otherwise healthy patients and only a small minority of HSV-1-infected individuals. Here, we elucidate a genetic etiology for HSE in two children with autosomal recessive deficiency in the intracellular protein UNC-93B, resulting in impaired cellular interferon-alpha/beta and -lambda antiviral responses. HSE can result from a single-gene immunodeficiency that does not compromise immunity to most pathogens, unlike most known primary immunodeficiencies. Other severe infectious diseases may also reflect monogenic disorders of immunity.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Casrouge, Armanda -- Zhang, Shen-Ying -- Eidenschenk, Celine -- Jouanguy, Emmanuelle -- Puel, Anne -- Yang, Kun -- Alcais, Alexandre -- Picard, Capucine -- Mahfoufi, Nora -- Nicolas, Nathalie -- Lorenzo, Lazaro -- Plancoulaine, Sabine -- Senechal, Brigitte -- Geissmann, Frederic -- Tabeta, Koichi -- Hoebe, Kasper -- Du, Xin -- Miller, Richard L -- Heron, Benedicte -- Mignot, Cyril -- de Villemeur, Thierry Billette -- Lebon, Pierre -- Dulac, Olivier -- Rozenberg, Flore -- Beutler, Bruce -- Tardieu, Marc -- Abel, Laurent -- Casanova, Jean-Laurent -- G0900867/Medical Research Council/United Kingdom -- New York, N.Y. -- Science. 2006 Oct 13;314(5797):308-12. Epub 2006 Sep 14.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Laboratoire de Genetique Humaine des Maladies Infectieuses, Universite de Paris Rene Descartes, INSERM, U550, Faculte de Medecine Necker, Paris 75015, France.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/16973841" target="_blank"〉PubMed〈/a〉
    Schlagwort(e): Child, Preschool ; Cytokines/biosynthesis ; Encephalitis, Herpes Simplex/*genetics/immunology ; Female ; *Genetic Predisposition to Disease ; *Herpesvirus 1, Human/immunology ; Humans ; Infant ; Interferon-alpha/biosynthesis/immunology ; Interferon-beta/biosynthesis/immunology ; Interferon-gamma/biosynthesis/immunology ; Interferons/*biosynthesis/immunology ; Leukocytes, Mononuclear/immunology ; Male ; Membrane Transport Proteins/*deficiency/genetics/*physiology ; Mutation ; Pedigree ; Signal Transduction ; Toll-Like Receptor 3/agonists/physiology ; Toll-Like Receptors/agonists/physiology
    Print ISSN: 0036-8075
    Digitale ISSN: 1095-9203
    Thema: Biologie , Chemie und Pharmazie , Informatik , Medizin , Allgemeine Naturwissenschaft , Physik
    Publiziert von American Association for the Advancement of Science (AAAS)
    Standort Signatur Erwartet Verfügbarkeit
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  • 100
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    A genomewide search for ribozymes reveals an HDV-like sequence in the human CPEB3 gene (2006)
    American Association for the Advancement of Science (AAAS)
    Details
    Publikationsdatum: 2006-09-23
    Beschreibung: Ribozymes are thought to have played a pivotal role in the early evolution of life, but relatively few have been identified in modern organisms. We performed an in vitro selection aimed at isolating self-cleaving RNAs from the human genome. The selection yielded several ribozymes, one of which is a conserved mammalian sequence that resides in an intron of the CPEB3 gene, which belongs to a family of genes regulating messenger RNA polyadenylation. The CPEB3 ribozyme is structurally and biochemically related to the human hepatitis delta virus (HDV) ribozymes. The occurrence of this ribozyme exclusively in mammals suggests that it may have evolved as recently as 200 million years ago. We postulate that HDV arose from the human transcriptome.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Salehi-Ashtiani, Kourosh -- Luptak, Andrej -- Litovchick, Alexander -- Szostak, Jack W -- GM53936/GM/NIGMS NIH HHS/ -- HL66678/HL/NHLBI NIH HHS/ -- New York, N.Y. -- Science. 2006 Sep 22;313(5794):1788-92.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Howard Hughes Medical Institute, Department of Molecular Biology, and Center for Computational and Integrative Biology (CCIB), 7215 Simches Research Center, Massachusetts General Hospital, 185 Cambridge Street, Boston, MA 02114, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/16990549" target="_blank"〉PubMed〈/a〉
    Schlagwort(e): Base Pairing ; Base Sequence ; Catalysis ; Cations, Divalent/metabolism ; Conserved Sequence ; *Evolution, Molecular ; Expressed Sequence Tags ; *Genome, Human ; Genomic Library ; Hepatitis Delta Virus/genetics ; Humans ; Hydrogen-Ion Concentration ; *Introns ; Molecular Sequence Data ; Mutation ; Nucleic Acid Conformation ; Phosphorylation ; RNA, Catalytic/chemistry/genetics/*isolation & purification/*metabolism ; RNA-Binding Proteins/*genetics
    Print ISSN: 0036-8075
    Digitale ISSN: 1095-9203
    Thema: Biologie , Chemie und Pharmazie , Informatik , Medizin , Allgemeine Naturwissenschaft , Physik
    Publiziert von American Association for the Advancement of Science (AAAS)
    Standort Signatur Erwartet Verfügbarkeit
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