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  • Mice  (214)
  • Mutation  (161)
  • American Association for the Advancement of Science (AAAS)  (329)
  • American Institute of Physics (AIP)
  • 2000-2004  (329)
  • 2004  (329)
Collection
Keywords
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  • American Association for the Advancement of Science (AAAS)  (329)
  • American Institute of Physics (AIP)
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  • 2000-2004  (329)
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  • 1
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    No transcription-translation feedback in circadian rhythm of KaiC phosphorylation (2004)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2004-11-20
    Description: An autoregulatory transcription-translation feedback loop is thought to be essential in generating circadian rhythms in any model organism. In the cyanobacterium Synechococcus elongatus, the essential clock protein KaiC is proposed to form this type of transcriptional negative feedback. Nevertheless, we demonstrate here temperature-compensated, robust circadian cycling of KaiC phosphorylation even without kaiBC messenger RNA accumulation under continuous dark conditions. This rhythm persisted in the presence of a transcription or translation inhibitor. Moreover, kinetic profiles in the ratio of KaiC autophosphorylation-dephosphorylation were also temperature compensated in vitro. Thus, the cyanobacterial clock can keep time independent of de novo transcription and translation processes.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Tomita, Jun -- Nakajima, Masato -- Kondo, Takao -- Iwasaki, Hideo -- New York, N.Y. -- Science. 2005 Jan 14;307(5707):251-4. Epub 2004 Nov 18.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Division of Biological Science, Graduate School of Science, Nagoya University, and Core Research for Evolutional Science and Technology, Japan Science and Technology Agency, Furo-cho, Chikusa-ku, Nagoya 464-8602, Japan.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/15550625" target="_blank"〉PubMed〈/a〉
    Keywords: Bacterial Proteins/biosynthesis/*metabolism ; *Circadian Rhythm ; Circadian Rhythm Signaling Peptides and Proteins ; Darkness ; Feedback, Physiological ; Light ; Mutation ; Operon ; Phosphorylation ; Protein Biosynthesis ; RNA, Bacterial/metabolism ; RNA, Messenger/metabolism ; Recombinant Proteins/metabolism ; Synechococcus/*genetics/*metabolism ; Temperature ; Transcription, Genetic
    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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  • 2
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    Neuroscience. The mice that don't miss mom: love and the mu-opioid receptor (2004)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2004-06-26
    Description: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Beckman, Mary -- New York, N.Y. -- Science. 2004 Jun 25;304(5679):1888-9.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/15218114" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Animals, Newborn ; Bedding and Linens ; *Behavior, Animal ; Female ; Male ; *Maternal Deprivation ; Mice ; *Mothers ; Mutation ; *Object Attachment ; Odors ; Receptors, Opioid, mu/genetics/*physiology ; Vocalization, Animal
    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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  • 3
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    Medicine. Bone marrow cells: the source of gastric cancer? (2004)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2004-11-30
    Description: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Marx, Jean -- New York, N.Y. -- Science. 2004 Nov 26;306(5701):1455-7.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/15567822" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Bone Marrow Cells/*cytology ; Bone Marrow Transplantation ; Cell Differentiation ; Cell Fusion ; Disease Progression ; Female ; Gastric Mucosa/chemistry/pathology ; Gastritis/microbiology/*pathology ; Helicobacter Infections/*pathology ; *Helicobacter felis ; Male ; Mice ; Mice, Inbred C57BL ; Stem Cells/*cytology ; Stomach Neoplasms/*pathology
    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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  • 4
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    Neuroscience. NAD to the rescue (2004)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2004-08-18
    Description: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Bedalov, Antonio -- Simon, Julian A -- New York, N.Y. -- Science. 2004 Aug 13;305(5686):954-5.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Clinical Research Division and J. A. Simon is in the Clinical Research and Human Biology Divisions, Fred Hutchinson Cancer Research Center, Seattle, WA 98109, USA. abedalov@fhcrc.org〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/15310883" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Axons/*physiology ; Cell Nucleus/metabolism ; Cell Survival ; Cells, Cultured ; Ganglia, Spinal/cytology ; Mice ; Mutation ; NAD/biosynthesis/*metabolism ; Nerve Tissue Proteins/genetics/*metabolism ; Neurodegenerative Diseases/drug therapy/physiopathology ; Neuroprotective Agents/therapeutic use ; Nicotinamide-Nucleotide Adenylyltransferase/metabolism ; RNA, Small Interfering ; Sirtuin 1 ; Sirtuins/metabolism ; Ubiquitin-Protein Ligases/metabolism ; Wallerian Degeneration/metabolism/*physiopathology
    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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  • 5
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    Cancer research. Inflammation and cancer: the link grows stronger (2004)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2004-11-06
    Description: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Marx, Jean -- New York, N.Y. -- Science. 2004 Nov 5;306(5698):966-8.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/15528423" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Cyclooxygenase 2 ; Humans ; Inflammation/*complications/immunology ; Isoenzymes/metabolism ; Macrophage Colony-Stimulating Factor/physiology ; Macrophages/immunology ; Membrane Proteins ; Mice ; NF-kappa B/physiology ; Neoplasms/*etiology/immunology ; Prostaglandin-Endoperoxide Synthases/metabolism ; Risk Factors
    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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  • 6
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    Regulation of cytokine receptors by Golgi N-glycan processing and endocytosis (2004)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2004-10-02
    Description: The Golgi enzyme beta1,6 N-acetylglucosaminyltransferase V (Mgat5) is up-regulated in carcinomas and promotes the substitution of N-glycan with poly N-acetyllactosamine, the preferred ligand for galectin-3 (Gal-3). Here, we report that expression of Mgat5 sensitized mouse cells to multiple cytokines. Gal-3 cross-linked Mgat5-modified N-glycans on epidermal growth factor and transforming growth factor-beta receptors at the cell surface and delayed their removal by constitutive endocytosis. Mgat5 expression in mammary carcinoma was rate limiting for cytokine signaling and consequently for epithelial-mesenchymal transition, cell motility, and tumor metastasis. Mgat5 also promoted cytokine-mediated leukocyte signaling, phagocytosis, and extravasation in vivo. Thus, conditional regulation of N-glycan processing drives synchronous modification of cytokine receptors, which balances their surface retention against loss via endocytosis.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Partridge, Emily A -- Le Roy, Christine -- Di Guglielmo, Gianni M -- Pawling, Judy -- Cheung, Pam -- Granovsky, Maria -- Nabi, Ivan R -- Wrana, Jeffrey L -- Dennis, James W -- New York, N.Y. -- Science. 2004 Oct 1;306(5693):120-4.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Samuel Lunenfeld Research Institute, Mount Sinai Hospital, 600 University Avenue, Toronto, ON M5G 1X5, Canada.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/15459394" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Cell Line, Tumor ; Cell Membrane/metabolism ; Cell Movement ; Cell Transformation, Neoplastic ; *Endocytosis ; Galectin 3/metabolism ; Genetic Vectors ; Glycosylation ; Golgi Apparatus/enzymology ; Growth Substances/metabolism/pharmacology ; Macrophages, Peritoneal/physiology ; Mammary Neoplasms, Animal/metabolism/pathology ; Mice ; Mice, Transgenic ; N-Acetylglucosaminyltransferases/genetics/*metabolism ; Neoplasm Metastasis ; Phagocytosis ; Polysaccharides/*metabolism ; Receptor, Epidermal Growth Factor/*metabolism ; Receptors, Cytokine/*metabolism ; Receptors, Transforming Growth Factor beta/*metabolism ; Signal Transduction
    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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  • 7
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    Ultraconserved elements in the human genome (2004)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2004-05-08
    Description: There are 481 segments longer than 200 base pairs (bp) that are absolutely conserved (100% identity with no insertions or deletions) between orthologous regions of the human, rat, and mouse genomes. Nearly all of these segments are also conserved in the chicken and dog genomes, with an average of 95 and 99% identity, respectively. Many are also significantly conserved in fish. These ultraconserved elements of the human genome are most often located either overlapping exons in genes involved in RNA processing or in introns or nearby genes involved in the regulation of transcription and development. Along with more than 5000 sequences of over 100 bp that are absolutely conserved among the three sequenced mammals, these represent a class of genetic elements whose functions and evolutionary origins are yet to be determined, but which are more highly conserved between these species than are proteins and appear to be essential for the ontogeny of mammals and other vertebrates.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Bejerano, Gill -- Pheasant, Michael -- Makunin, Igor -- Stephen, Stuart -- Kent, W James -- Mattick, John S -- Haussler, David -- 1P41HG02371/HG/NHGRI NIH HHS/ -- New York, N.Y. -- Science. 2004 May 28;304(5675):1321-5. Epub 2004 May 6.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Biomolecular Engineering, University of California Santa Cruz, Santa Cruz, CA 95064, USA. jill@soe.ucsc.edu〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/15131266" target="_blank"〉PubMed〈/a〉
    Keywords: Alternative Splicing ; Animals ; Base Sequence ; Chickens/genetics ; Computational Biology ; *Conserved Sequence ; DNA, Intergenic ; Dogs/genetics ; Evolution, Molecular ; Exons ; Gene Expression Regulation ; Genes ; Genome ; *Genome, Human ; Humans ; Introns ; Mice/genetics ; Molecular Sequence Data ; Mutation ; Nucleic Acid Conformation ; RNA/chemistry/genetics/metabolism ; Rats/genetics ; Takifugu/genetics
    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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  • 8
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    Coordination of meiotic recombination, pairing, and synapsis by PHS1 (2004)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2004-01-06
    Description: Pairing, synapsis, and recombination are prerequisites for accurate chromosome segregation in meiosis. The phs1 gene in maize is required for pairing to occur between homologous chromosomes. In the phs1 mutant, homologous chromosome synapsis is completely replaced by synapsis between nonhomologous partners. The phs1 gene is also required for installation of the meiotic recombination machinery on chromosomes, as the mutant almost completely lacks chromosomal foci of the recombination protein RAD51. Thus, in the phs1 mutant, synapsis is uncoupled from recombination and pairing. The protein encoded by the phs1 gene likely acts in a multistep process to coordinate pairing, recombination, and synapsis.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Pawlowski, Wojciech P -- Golubovskaya, Inna N -- Timofejeva, Ljudmilla -- Meeley, Robert B -- Sheridan, William F -- Cande, W Zacheus -- New York, N.Y. -- Science. 2004 Jan 2;303(5654):89-92.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Molecular and Cell Biology, University of California, Berkeley, CA 94720, USA. wpawlows@nature.berkeley.edu〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/14704428" target="_blank"〉PubMed〈/a〉
    Keywords: Amino Acid Sequence ; Cell Nucleus/metabolism ; *Chromosome Pairing ; Chromosomes, Plant/*physiology ; Cloning, Molecular ; Conserved Sequence ; DNA, Plant/metabolism ; DNA-Binding Proteins ; Genes, Plant ; In Situ Hybridization, Fluorescence ; In Situ Nick-End Labeling/methods ; *Meiosis ; Molecular Sequence Data ; Mutation ; Phenotype ; Plant Proteins/chemistry/genetics/*physiology ; RNA, Ribosomal, 5S/genetics ; Rad51 Recombinase ; *Recombination, Genetic ; Sequence Alignment ; Synaptonemal Complex/metabolism/ultrastructure ; Telomere/physiology ; Zea mays/*genetics/physiology
    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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  • 9
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    In vivo activation of the p53 pathway by small-molecule antagonists of MDM2 (2004)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2004-01-06
    Description: MDM2 binds the p53 tumor suppressor protein with high affinity and negatively modulates its transcriptional activity and stability. Overexpression of MDM2, found in many human tumors, effectively impairs p53 function. Inhibition of MDM2-p53 interaction can stabilize p53 and may offer a novel strategy for cancer therapy. Here, we identify potent and selective small-molecule antagonists of MDM2 and confirm their mode of action through the crystal structures of complexes. These compounds bind MDM2 in the p53-binding pocket and activate the p53 pathway in cancer cells, leading to cell cycle arrest, apoptosis, and growth inhibition of human tumor xenografts in nude mice.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Vassilev, Lyubomir T -- Vu, Binh T -- Graves, Bradford -- Carvajal, Daisy -- Podlaski, Frank -- Filipovic, Zoran -- Kong, Norman -- Kammlott, Ursula -- Lukacs, Christine -- Klein, Christian -- Fotouhi, Nader -- Liu, Emily A -- New York, N.Y. -- Science. 2004 Feb 6;303(5659):844-8. Epub 2004 Jan 2.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Discovery Oncology, Roche Research Center, Hoffmann-La Roche, Inc., Nutley, NJ 07110, USA. lyubomir.vassilev@roche.com〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/14704432" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Apoptosis/*drug effects ; Binding Sites ; Cell Cycle/drug effects ; Cell Division/*drug effects ; Cell Line ; Cell Line, Tumor ; Cell Survival/drug effects ; Crystallization ; Crystallography, X-Ray ; Cyclin-Dependent Kinase Inhibitor p21 ; Cyclins/metabolism ; Dose-Response Relationship, Drug ; Gene Expression ; Genes, p53 ; Humans ; Hydrophobic and Hydrophilic Interactions ; Imidazoles/chemistry/metabolism/*pharmacology ; Mice ; Mice, Nude ; Models, Molecular ; Molecular Weight ; NIH 3T3 Cells ; Neoplasm Transplantation ; Neoplasms, Experimental/drug therapy/metabolism/*pathology ; *Nuclear Proteins ; Phosphorylation ; Piperazines/chemistry/metabolism/*pharmacology ; Protein Conformation ; Proto-Oncogene Proteins/*antagonists & inhibitors/chemistry/metabolism ; Proto-Oncogene Proteins c-mdm2 ; Stereoisomerism ; Transplantation, Heterologous ; Tumor Suppressor Protein p53/*metabolism
    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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  • 10
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    RNAi-mediated targeting of heterochromatin by the RITS complex (2004)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2004-01-06
    Description: RNA interference (RNAi) is a widespread silencing mechanism that acts at both the posttranscriptional and transcriptional levels. Here, we describe the purification of an RNAi effector complex termed RITS (RNA-induced initiation of transcriptional gene silencing) that is required for heterochromatin assembly in fission yeast. The RITS complex contains Ago1 (the fission yeast Argonaute homolog), Chp1 (a heterochromatin-associated chromodomain protein), and Tas3 (a novel protein). In addition, the complex contains small RNAs that require the Dicer ribonuclease for their production. These small RNAs are homologous to centromeric repeats and are required for the localization of RITS to heterochromatic domains. The results suggest a mechanism for the role of the RNAi machinery and small RNAs in targeting of heterochromatin complexes and epigenetic gene silencing at specific chromosomal loci.〈br /〉〈br /〉〈a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3244756/" 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/PMC3244756/" target="_blank"〉This paper as free author manuscript - peer-reviewed and accepted for publication〈/a〉〈br /〉〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Verdel, Andre -- Jia, Songtao -- Gerber, Scott -- Sugiyama, Tomoyasu -- Gygi, Steven -- Grewal, Shiv I S -- Moazed, Danesh -- R01 GM072805/GM/NIGMS NIH HHS/ -- R01 GM072805-01/GM/NIGMS NIH HHS/ -- Howard Hughes Medical Institute/ -- New York, N.Y. -- Science. 2004 Jan 30;303(5658):672-6. Epub 2004 Jan 2.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Cell Biology, Harvard Medical School, Boston, MA02115, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/14704433" target="_blank"〉PubMed〈/a〉
    Keywords: Amino Acid Sequence ; Argonaute Proteins ; Cell Cycle Proteins/chemistry/genetics/isolation & purification/*metabolism ; Centromere/metabolism ; Chromosomes, Fungal/metabolism ; Endoribonucleases/chemistry/genetics/isolation & purification/metabolism ; Genes, Reporter ; Heterochromatin/*metabolism ; Mass Spectrometry ; Models, Genetic ; Molecular Sequence Data ; Mutation ; Precipitin Tests ; Protein Binding ; *RNA Interference ; RNA, Fungal/metabolism ; RNA, Small Interfering/metabolism ; RNA-Binding Proteins ; Ribonuclease III/metabolism ; Schizosaccharomyces/*genetics/metabolism ; Schizosaccharomyces pombe Proteins/chemistry/genetics/isolation & ; purification/*metabolism
    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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