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  • Articles  (251)
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  • American Association for the Advancement of Science (AAAS)  (251)
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  • Articles  (251)
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  • American Association for the Advancement of Science (AAAS)  (251)
  • American Physical Society (APS)
  • Springer Nature
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  • 2010-2014
  • 2000-2004  (251)
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  • 11
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    A transcriptional switch mediated by cofactor methylation (2001)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2001-11-10
    Description: We describe a molecular switch based on the controlled methylation of nucleosome and the transcriptional cofactors, the CREB-binding proteins (CBP)/p300. The CBP/p300 methylation site is localized to an arginine residue that is essential for stabilizing the structure of the KIX domain, which mediates CREB recruitment. Methylation of KIX by coactivator-associated arginine methyltransferase 1 (CARM1) blocks CREB activation by disabling the interaction between KIX and the kinase inducible domain (KID) of CREB. Thus, CARM1 functions as a corepressor in cyclic adenosine monophosphate signaling pathway via its methyltransferase activity while acting as a coactivator for nuclear hormones. These results provide strong in vivo and in vitro evidence that histone methylation plays a key role in hormone-induced gene activation and define cofactor methylation as a new regulatory mechanism in hormone signaling.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Xu, W -- Chen, H -- Du, K -- Asahara, H -- Tini, M -- Emerson, B M -- Montminy, M -- Evans, R M -- 9R01DK57978/DK/NIDDK NIH HHS/ -- New York, N.Y. -- Science. 2001 Dec 21;294(5551):2507-11. Epub 2001 Nov 8.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Gene Expression Laboratory, Department of Biological Chemistry, University of California Davis Cancer Center/Basic Science, Sacramento, CA 95817, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/11701890" target="_blank"〉PubMed〈/a〉
    Keywords: Acetyltransferases/metabolism ; Amino Acid Sequence ; Animals ; Apoptosis ; Cell Line ; Cyclic AMP Response Element-Binding Protein/metabolism ; Dimerization ; E1A-Associated p300 Protein ; *Gene Expression Regulation ; Genes, Reporter ; Histone Acetyltransferases ; Histones/metabolism ; Methylation ; Molecular Sequence Data ; Nerve Growth Factor/pharmacology ; Nuclear Proteins/chemistry/*metabolism ; PC12 Cells ; Protein Structure, Tertiary ; Protein-Arginine N-Methyltransferases/*metabolism ; Rats ; Receptors, Retinoic Acid/*metabolism ; Recombinant Fusion Proteins/metabolism ; Retinoid X Receptors ; *Saccharomyces cerevisiae Proteins ; Signal Transduction ; Somatostatin/genetics ; Trans-Activators/chemistry/*metabolism ; Transcription Factors/metabolism ; *Transcription, Genetic ; Transcriptional Activation ; Transfection ; Tretinoin/metabolism/pharmacology
    Print ISSN: 0036-8075
    Electronic ISSN: 1095-9203
    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
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  • 12
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    Localization of long-term memory within the Drosophila mushroom body (2001)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2001-11-03
    Description: The mushroom bodies, substructures of the Drosophila brain, are involved in olfactory learning and short-term memory, but their role in long-term memory is unknown. Here we show that the alpha-lobes-absent (ala) mutant lacks either the two vertical lobes of the mushroom body or two of the three median lobes which contain branches of vertical lobe neurons. This unique phenotype allows analysis of mushroom body function. Long-term memory required the presence of the vertical lobes but not the median lobes. Short-term memory was normal in flies without either vertical lobes or the two median lobes studied.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Pascual, A -- Preat, T -- New York, N.Y. -- Science. 2001 Nov 2;294(5544):1115-7.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Developpement, Evolution, Plasticite du Systeme Nerveux, CNRS, 1 Avenue de la Terrasse, 91190 Gif-sur-Yvette, France.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/11691997" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Axons/physiology ; Conditioning (Psychology) ; Dendrites/physiology ; Drosophila/genetics/*physiology ; Electroshock ; Genes, Insect ; Memory/*physiology ; Memory, Short-Term/physiology ; Microscopy, Confocal ; Mushroom Bodies/anatomy & histology/*physiology ; Mutation ; Neurons, Efferent/physiology ; Odors ; Phenotype
    Print ISSN: 0036-8075
    Electronic ISSN: 1095-9203
    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
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  • 13
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    Regulation of differentiation to the infective stage of the protozoan parasite Leishmania major by tetrahydrobiopterin (2001)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2001-04-17
    Description: A critical step in the infectious cycle of Leishmania is the differentiation of parasites within the sand fly vector to the highly infective metacyclic promastigote stage. Here, we establish tetrahydrobiopterin (H4B) levels as an important factor controlling the extent of metacyclogenesis. H4B levels decline substantially during normal development, and genetic or nutritional manipulations showed that low H4B caused elevated metacyclogenesis. Mutants lacking pteridine reductase 1 (PTR1) had low levels of H4B, remained infectious to mice, and induced larger cutaneous lesions (hypervirulence). Thus, the control of pteridine metabolism has relevance to the mechanism of Leishmania differentiation and the limitation of virulence during evolution.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Cunningham, M L -- Titus, R G -- Turco, S J -- Beverley, S M -- AI21903/AI/NIAID NIH HHS/ -- AI31078/AI/NIAID NIH HHS/ -- New York, N.Y. -- Science. 2001 Apr 13;292(5515):285-7.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Molecular Microbiology, Washington University School of Medicine, St. Louis, MO 63110, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/11303103" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Biopterin/*analogs & derivatives/*metabolism/pharmacology ; Carrier Proteins/genetics/metabolism ; Chromatography, High Pressure Liquid ; Folic Acid/metabolism ; Genes, Protozoan ; Glycosphingolipids/analysis ; Leishmania major/genetics/*growth & development/*metabolism/pathogenicity ; Leishmaniasis, Cutaneous/*parasitology ; *Membrane Transport Proteins ; Mice ; Mice, Inbred BALB C ; Molecular Sequence Data ; Mutation ; Oxidoreductases/genetics/metabolism ; *Protozoan Proteins ; Signal Transduction ; Virulence
    Print ISSN: 0036-8075
    Electronic ISSN: 1095-9203
    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
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  • 14
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    Cancer. A CINtillating new job for the APC tumor suppressor (2001)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2001-04-05
    Description: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Pellman, D -- New York, N.Y. -- Science. 2001 Mar 30;291(5513):2555-6.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Pediatric Oncology, Dana-Farber Cancer Institute, and Pediatric Hematology/Oncology, Children's Hospital, Harvard Medical School, 44 Binney Street, Boston, MA 02115, USA. david_pellman@dfci.harvard.edu〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/11286276" target="_blank"〉PubMed〈/a〉
    Keywords: Adenomatous Polyposis Coli Protein ; Aneuploidy ; Animals ; Cell Transformation, Neoplastic ; Cells, Cultured ; Chromosome Aberrations ; Chromosome Segregation ; Chromosomes/*physiology ; Colonic Neoplasms/*genetics/metabolism/pathology ; Cytoskeletal Proteins/chemistry/*metabolism ; *Genes, APC ; Humans ; Kinetochores/*metabolism ; Mice ; Microtubule-Associated Proteins/metabolism ; Microtubules/*metabolism ; Mitosis ; Mutation ; Protein Kinases/metabolism ; Protein-Serine-Threonine Kinases ; Spindle Apparatus/metabolism ; Stem Cells/cytology/metabolism ; *Trans-Activators ; beta Catenin
    Print ISSN: 0036-8075
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    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
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  • 15
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    Toward automated synthesis of oligosaccharides and glycoproteins (2001)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2001-03-28
    Description: The discovery of previously unknown functions associated with carbohydrates and the study of their structure-function relations are of current interest in carbohydrate chemistry and biology. Progress in this area is, however, hampered by the lack of convenient and effective tools for the synthesis and analysis of oligosaccharides and glycoconjugates. Development of automated synthesis of such materials is necessary to facilitate research in this field. This review describes recent advances in carbohydrate synthesis, with particular focus on developments that have potential application to the automated synthesis of oligosaccharides, glycopeptides, and glycoproteins.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Sears, P -- Wong, C H -- New York, N.Y. -- Science. 2001 Mar 23;291(5512):2344-50.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Chemistry and Skaggs Institute for Chemical Biology, The Scripps Research Institute, 10550 North Torrey Pines Road, La Jolla, CA 92037, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/11269314" target="_blank"〉PubMed〈/a〉
    Keywords: Automation ; Carbohydrate Conformation ; Carbohydrate Sequence ; DNA, Recombinant ; Endopeptidases/metabolism ; Fermentation ; Glycopeptides/biosynthesis/chemical synthesis/chemistry ; Glycoproteins/*biosynthesis/*chemical synthesis/chemistry ; Glycoside Hydrolases/metabolism ; Glycosylation ; Glycosyltransferases/metabolism ; Molecular Sequence Data ; Oligosaccharides/*biosynthesis/*chemical synthesis/chemistry ; Protein Splicing ; Software
    Print ISSN: 0036-8075
    Electronic ISSN: 1095-9203
    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
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  • 16
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    Genomics and medicine. Dissecting human disease in the postgenomic era (2001)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2001-03-10
    Description: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Peltonen, L -- McKusick, V A -- New York, N.Y. -- Science. 2001 Feb 16;291(5507):1224-9.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Human Genetics, University of California Los Angeles School of Medicine, Los Angeles, CA 90095-7088, USA. lpeltonen@mednet.ucla.edu〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/11233446" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Computational Biology ; Delivery of Health Care ; *Disease ; Environment ; Gene Expression Profiling ; *Genetic Diseases, Inborn ; Genetic Predisposition to Disease ; Genetic Testing ; Genetic Variation ; *Genetics, Medical ; Genome ; *Genome, Human ; *Genomics ; Human Genome Project ; Humans ; Metabolic Diseases/genetics ; Multifactorial Inheritance ; Mutation ; Phenotype ; Polymorphism, Single Nucleotide ; Quantitative Trait, Heritable ; Risk Factors
    Print ISSN: 0036-8075
    Electronic ISSN: 1095-9203
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  • 17
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    Pot1, the putative telomere end-binding protein in fission yeast and humans (2001)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2001-05-12
    Description: Telomere proteins from ciliated protozoa bind to the single-stranded G-rich DNA extensions at the ends of macronuclear chromosomes. We have now identified homologous proteins in fission yeast and in humans. These Pot1 (protection of telomeres) proteins each bind the G-rich strand of their own telomeric repeat sequence, consistent with a direct role in protecting chromosome ends. Deletion of the fission yeast pot1+ gene has an immediate effect on chromosome stability, causing rapid loss of telomeric DNA and chromosome circularization. It now appears that the protein that caps the ends of chromosomes is widely dispersed throughout the eukaryotic kingdom.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Baumann, P -- Cech, T R -- New York, N.Y. -- Science. 2001 May 11;292(5519):1171-5.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Howard Hughes Medical Institute, Department of Chemistry and Biochemistry, University of Colorado, Boulder, CO 80309, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/11349150" target="_blank"〉PubMed〈/a〉
    Keywords: Amino Acid Sequence ; Base Sequence ; Binding Sites ; Chromosome Segregation/genetics ; Chromosomes, Fungal/genetics/metabolism ; Cloning, Molecular ; DNA/genetics/metabolism ; DNA-Binding Proteins/chemistry/genetics/*metabolism ; Electrophoresis, Gel, Pulsed-Field ; Female ; Gene Deletion ; Gene Expression Profiling ; Heterozygote ; Humans ; Molecular Sequence Data ; Ovary/metabolism ; Phenotype ; RNA, Messenger/analysis/genetics ; Schizosaccharomyces/*genetics ; Schizosaccharomyces pombe Proteins ; Sequence Alignment ; Substrate Specificity ; Telomere/genetics/*metabolism ; *Telomere-Binding Proteins
    Print ISSN: 0036-8075
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  • 18
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    Virology. HIV--breaking the rules for nuclear entry (2001)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2001-11-03
    Description: How does human immunodeficiency virus (HIV) gain access to the carefully guarded nucleus of the host cell? In a Perspective, Segura-Totten and Wilson elaborate on new findings (de Noronha et al.) showing that the HIV protein Vpr is crucial for causing transient herniations in the host cell nuclear envelope. These ruptures are sufficient to enable the preintegration complexes of invading virions to enter the nucleus and to integrate with host cell DNA.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Segura-Totten, M -- Wilson, K L -- New York, N.Y. -- Science. 2001 Nov 2;294(5544):1016-7.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Cell Biology, 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/11691977" target="_blank"〉PubMed〈/a〉
    Keywords: Cell Nucleus/*metabolism/*virology ; Chromatin/metabolism ; DNA-Binding Proteins/metabolism ; G2 Phase ; Gene Products, vpr/genetics/*metabolism ; HIV/*physiology ; HeLa Cells ; Humans ; Lamins ; Membrane Proteins/metabolism ; Mutation ; Nuclear Envelope/*metabolism/ultrastructure ; Nuclear Proteins/metabolism ; Phosphorylation ; Thymopoietins/metabolism ; *Virus Integration ; vpr Gene Products, Human Immunodeficiency Virus
    Print ISSN: 0036-8075
    Electronic ISSN: 1095-9203
    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
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  • 19
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    Stimulation of RNA polymerase II elongation by hepatitis delta antigen (2001)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2001-06-02
    Description: Transcription elongation by RNA polymerase II (RNAPII) is negatively regulated by the human factors DRB-sensitivity inducing factor (DSIF) and negative elongation factor (NELF). A 66-kilodalton subunit of NELF (NELF-A) shows limited sequence similarity to hepatitis delta antigen (HDAg), the viral protein required for replication of hepatitis delta virus (HDV). The host RNAPII has been implicated in HDV replication, but the detailed mechanism and the role of HDAg in this process are not understood. We show that HDAg binds RNAPII directly and stimulates transcription by displacing NELF and promoting RNAPII elongation. These results suggest that HDAg may regulate RNAPII elongation during both cellular messenger RNA synthesis and HDV RNA replication.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Yamaguchi, Y -- Filipovska, J -- Yano, K -- Furuya, A -- Inukai, N -- Narita, T -- Wada, T -- Sugimoto, S -- Konarska, M M -- Handa, H -- New York, N.Y. -- Science. 2001 Jul 6;293(5527):124-7. Epub 2001 May 31.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Frontier Collaborative Research Center, Tokyo Institute of Technology, 4259 Nagatsuta, Yokohama 226-8503, Japan.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/11387440" target="_blank"〉PubMed〈/a〉
    Keywords: Amino Acid Sequence ; Base Sequence ; Consensus Sequence/genetics ; Enzyme Activation ; HeLa Cells ; Hepatitis Antigens/chemistry/*metabolism ; *Hepatitis Delta Virus/chemistry/genetics/metabolism ; Hepatitis delta Antigens ; Humans ; Molecular Sequence Data ; Protein Binding ; Protein Subunits ; RNA Polymerase II/*metabolism ; RNA, Viral/biosynthesis/genetics ; Sequence Alignment ; Templates, Genetic ; Transcription Factors/antagonists & inhibitors/chemistry/metabolism ; *Transcription, Genetic ; Virus Replication
    Print ISSN: 0036-8075
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    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
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  • 20
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    Arabidopsis NPL1: a phototropin homolog controlling the chloroplast high-light avoidance response (2001)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2001-03-17
    Description: Chloroplasts relocate their positions in a cell in response to the intensity of incident light, moving to the side wall of the cell to avoid strong light, but gathering at the front face under weak light to maximize light interception. Here, Arabidopsis thaliana mutants defective in the avoidance response were isolated, and the mutated gene was identified as NPL1 (NPH-like 1), a homolog of NPH1 (nonphototropic hypocotyl 1), a blue light receptor used in phototropism. Hence, NPL1 is likely a blue light receptor regulating the avoidance response under strong light.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Kagawa, T -- Sakai, T -- Suetsugu, N -- Oikawa, K -- Ishiguro, S -- Kato, T -- Tabata, S -- Okada, K -- Wada, M -- New York, N.Y. -- Science. 2001 Mar 16;291(5511):2138-41.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉"Unit Process and Combined Circuit," PRESTO, Japan Science and Technology Corporation, 1-8, Honcho 4-chome, Kawaguchi-city, Saitama 332-0012, Japan.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/11251116" target="_blank"〉PubMed〈/a〉
    Keywords: Alleles ; Arabidopsis/genetics/*physiology/ultrastructure ; *Arabidopsis Proteins ; Cell Membrane/metabolism ; Chloroplasts/*physiology ; Genes, Plant ; *Light ; Movement ; Mutation ; Phosphoproteins/chemistry/physiology ; Phototropism ; Plant Leaves/metabolism ; Plant Proteins/chemistry/*genetics/*physiology ; Plant Structures/metabolism ; Protein Structure, Tertiary ; RNA, Messenger/genetics/metabolism ; RNA, Plant/genetics/metabolism
    Print ISSN: 0036-8075
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    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
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