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  • Mutation  (83)
  • American Association for the Advancement of Science (AAAS)  (83)
  • American Geophysical Union
  • Cambridge University Press
  • 2005-2009
  • 1995-1999  (83)
  • 1990-1994
  • 1970-1974
  • 1995  (83)
Collection
Publisher
  • American Association for the Advancement of Science (AAAS)  (83)
  • American Geophysical Union
  • Cambridge University Press
  • Springer  (5)
  • Wiley-Blackwell  (4)
Years
  • 2005-2009
  • 1995-1999  (83)
  • 1990-1994
  • 1970-1974
Year
  • 1
    Publication Date: 1995-09-08
    Description: Centromeres attach chromosomes to the spindle during mitosis, thereby ensuring the equal distribution of chromosomes into daughter cells. Transcriptionally silent heterochromatin of unknown function is associated with centromeres in many organisms. In the fission yeast Schizosaccharomyces pombe, the silent mating-type loci, centromeres, and telomeres are assembled into silent heterochromatin-like domains. The Swi6 chromodomain protein affects this silencing, and now it is shown that Swi6p localizes with these three chromosomal regions. In cells lacking Swi6p, centromeres lag on the spindle during anaphase and chromosomes are lost at high rates. Thus, Swi6p is located at fission yeast centromeres and is required for their proper function.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Ekwall, K -- Javerzat, J P -- Lorentz, A -- Schmidt, H -- Cranston, G -- Allshire, R -- Wellcome Trust/United Kingdom -- New York, N.Y. -- Science. 1995 Sep 8;269(5229):1429-31.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Medical Research Council Human Genetics Unit, Western General Hospital, Edinburgh, Scotland, UK.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/7660126" target="_blank"〉PubMed〈/a〉
    Keywords: Centromere/chemistry/*physiology ; Chromosomes, Fungal ; Fluorescent Antibody Technique ; Fungal Proteins/analysis/genetics/*physiology ; Genes, Fungal ; Genes, Mating Type, Fungal ; Heterochromatin/chemistry ; In Situ Hybridization, Fluorescence ; Interphase ; Mitosis ; Mutation ; *Saccharomyces cerevisiae Proteins ; Schizosaccharomyces/cytology/genetics/*physiology ; Telomere/chemistry ; Transcription Factors/analysis/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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  • 2
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    American Association for the Advancement of Science (AAAS)
    Publication Date: 1995-10-20
    Description: Over the past two decades, the small soil nematode Caenorhabditis elegans has become established as a major model system for the study of a great variety of problems in biology and medicine. One of its most significant advantages is its simplicity, both in anatomy and in genomic organization. The entire haploid genetic content amounts to 100 million base pairs of DNA, about 1/30 the size of the human value. As a result, C. elegans has also provided a pilot system for the construction of physical maps of larger animal and plant genomes, and subsequently for the complete sequencing of those genomes. By mid-1995, approximately one-fifth of the complete DNA sequence of this animal had been determined. Caenorhabditis elegans provides a test bed not only for the development and application of mapping and sequencing technologies, but also for the interpretation and use of complete sequence information. This article reviews the progress so far toward a realizable goal--the total description of the genome of a simple animal.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Hodgkin, J -- Plasterk, R H -- Waterston, R H -- New York, N.Y. -- Science. 1995 Oct 20;270(5235):410-4.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Medical Research Council Laboratory of Molecular Biology, Cambridge, UK.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/7569995" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Caenorhabditis elegans/*genetics ; *Chromosome Mapping ; Gene Expression ; *Genes, Helminth ; *Genome ; Mutation ; *Sequence Analysis, DNA
    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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    American Association for the Advancement of Science (AAAS)
    Publication Date: 1995-05-12
    Description: Mutations in genes required for associative learning and memory in Drosophila exist, but isolation of the genes has been difficult because most are defined by a single, chemically induced allele. Here, a simplified genetic screen was used to identify candidate genes involved in learning and memory. Second site suppressors of the dunce (dnc) female sterility phenotype were isolated with the use of transposon mutagenesis. One suppressor mutation that was recovered mapped in the amnesiac (amn) gene. Cloning of the locus revealed that amn encodes a previously uncharacterized neuropeptide gene. Thus, with the cloning of amn, specific neuropeptides are implicated in the memory process.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Feany, M B -- Quinn, W G -- New York, N.Y. -- Science. 1995 May 12;268(5212):869-73.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Neurobiology, Harvard Medical School, Boston, MA 02115, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/7754370" target="_blank"〉PubMed〈/a〉
    Keywords: Amino Acid Sequence ; Animals ; Cloning, Molecular ; Codon ; DNA Transposable Elements ; DNA, Complementary/genetics ; Drosophila/*genetics/physiology ; *Drosophila Proteins ; Female ; *Genes, Insect ; Growth Hormone-Releasing Hormone/chemistry/genetics ; Male ; Memory/*physiology ; Molecular Sequence Data ; Mutagenesis, Insertional ; Mutation ; Neuropeptides/chemistry/*genetics ; Pituitary Adenylate Cyclase-Activating Polypeptide ; Sequence Homology, Amino Acid ; Suppression, 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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  • 4
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    American Association for the Advancement of Science (AAAS)
    Publication Date: 1995-04-28
    Description: Epstein-Barr virus (EBV) nuclear antigen 2 (EBNA2) is a transcriptional activator that is essential for EBV-driven B cell immortalization. EBNA2 is targeted to responsive promoters through interaction with a cellular DNA binding protein, C promoter binding factor 1 (CBF1). A transcriptional repression domain has been identified within CBF1. This domain also interacts with EBNA2, and repression is masked by EBNA2 binding. Thus, EBNA2 acts by countering transcriptional repression. Mutation at amino acid 233 of CBF1 abolishes repression and correlates with a loss-of-function mutation in the Drosophila homolog Su(H).〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Hsieh, J J -- Hayward, S D -- CA42245/CA/NCI NIH HHS/ -- New York, N.Y. -- Science. 1995 Apr 28;268(5210):560-3.〈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/7725102" target="_blank"〉PubMed〈/a〉
    Keywords: Antigens, Viral/chemistry/*metabolism ; DNA-Binding Proteins/chemistry/*metabolism ; Epstein-Barr Virus Nuclear Antigens ; *Gene Expression Regulation ; HeLa Cells ; Humans ; Immunoglobulin J Recombination Signal Sequence-Binding Protein ; Models, Genetic ; Mutation ; *Nuclear Proteins ; Promoter Regions, Genetic ; Trans-Activators/chemistry/*metabolism ; *Transcription, Genetic ; Transfection
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    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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    American Association for the Advancement of Science (AAAS)
    Publication Date: 1995-01-27
    Description: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Roop, D -- New York, N.Y. -- Science. 1995 Jan 27;267(5197):474-5.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Cell Biology, Baylor College of Medicine, Houston, TX 77030.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/7529942" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Cell Differentiation ; Cell Membrane/metabolism ; Humans ; Ichthyosis/*genetics/metabolism/pathology ; Ichthyosis, Lamellar/*genetics/metabolism/pathology ; Intermediate Filaments/metabolism/ultrastructure ; Keratinocytes/metabolism/*ultrastructure ; Keratins/genetics ; Lipid Metabolism ; Mutation ; Transglutaminases/genetics/metabolism
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    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
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  • 6
    Publication Date: 1995-01-27
    Description: Lamellar ichthyosis is a severe congenital skin disorder characterized by generalized large scales and variable redness. Affected individuals in three families exhibited drastically reduced keratinocyte transglutaminase (TGK) activity. In two of these families, expression of TGK transcripts was diminished or abnormal and no TGK protein was detected. Homozygous or compound heterozygous mutations of the TGK gene were identified in all families. These data suggest that defects in TGK cause lamellar ichthyosis and that intact cross-linkage of cornified cell envelopes is required for epidermal tissue homeostasis.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Huber, M -- Rettler, I -- Bernasconi, K -- Frenk, E -- Lavrijsen, S P -- Ponec, M -- Bon, A -- Lautenschlager, S -- Schorderet, D F -- Hohl, D -- New York, N.Y. -- Science. 1995 Jan 27;267(5197):525-8.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Dermatology, Centre Hospitalier Universitaire Vandois (CHUV), Hopital de Beaumont, Lausanne, Switzerland.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/7824952" target="_blank"〉PubMed〈/a〉
    Keywords: Base Sequence ; Cell Membrane/metabolism ; Cells, Cultured ; Codon ; Female ; Gene Deletion ; Genetic Linkage ; Heterozygote ; Homozygote ; Humans ; Ichthyosis, Lamellar/enzymology/*genetics ; Introns ; Keratinocytes/*enzymology/ultrastructure ; Male ; Membrane Proteins/metabolism ; Molecular Sequence Data ; Mutation ; Pedigree ; Point Mutation ; Protein Precursors/metabolism ; Transglutaminases/*genetics/metabolism
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    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
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  • 7
    Publication Date: 1995-12-22
    Description: Reliable germline transformation is required for molecular studies and ultimately for genetic control of economically important insects, such as the Mediterranean fruit fly (medfly) Ceratitis capitata. A prerequisite for the establishment and maintenance of transformant lines is selectable or phenotypically dominant markers. To this end, a complementary DNA clone derived from the medfly white gene was isolated, which showed substantial similarity to white genes in Drosophila melanogaster and other Diptera. It is correlated with a spontaneous mutation causing white eyes in the medfly and can be used to restore partial eye color in transgenic Drosophila carrying a null mutation in the endogenous white gene.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Zwiebel, L J -- Saccone, G -- Zacharopoulou, A -- Besansky, N J -- Favia, G -- Collins, F H -- Louis, C -- Kafatos, F C -- New York, N.Y. -- Science. 1995 Dec 22;270(5244):2005-8.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉European Molecular Biology Laboratory (EMBL), Heidelberg, Germany.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/8533095" target="_blank"〉PubMed〈/a〉
    Keywords: *ATP-Binding Cassette Transporters ; Amino Acid Sequence ; Animals ; Animals, Genetically Modified ; Base Sequence ; Cloning, Molecular ; Diptera/chemistry/*genetics ; *Drosophila Proteins ; Drosophila melanogaster/genetics ; Eye Color/genetics ; Eye Proteins/chemistry/*genetics ; *Genes, Insect ; Genetic Markers ; Insect Hormones/chemistry/genetics ; Molecular Sequence Data ; Mutation ; Phenotype ; Sequence Alignment ; *Transformation, Genetic
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  • 8
    Publication Date: 1995-11-17
    Description: In the yeast Saccharomyces cerevisiae, Ras regulates adenylate cyclase, which is essential for progression through the G1 phase of the cell cycle. However, even when the adenosine 3',5'-monophosphate (cAMP) pathway was bypassed, the double disruption of RAS1 and RAS2 resulted in defects in growth at both low and high temperatures. Furthermore, the simultaneous disruption of RAS1, RAS2, and the RAS-related gene RSR1 was lethal at any temperature. The triple-disrupted cells were arrested late in the mitotic (M) phase, which was accompanied by an accumulation of cells with divided chromosomes and sustained histone H1 kinase activity. The lethality of the triple disruption was suppressed by the multicopies of CDC5, CDC15, DBF2, SPO12, and TEM1, all of which function in the completion of the M phase. Mammalian ras also suppressed the lethality, which suggests that a similar signaling pathway exists in higher eukaryotes. These results demonstrate that S. cerevisiae Ras functions in the completion of the M phase in a manner independent of the Ras-cAMP pathway.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Morishita, T -- Mitsuzawa, H -- Nakafuku, M -- Nakamura, S -- Hattori, S -- Anraku, Y -- New York, N.Y. -- Science. 1995 Nov 17;270(5239):1213-5.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Division of Biochemistry and Cellular Biology, National Institute of Neuroscience, Tokyo, Japan.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/7502049" target="_blank"〉PubMed〈/a〉
    Keywords: Adenylyl Cyclases/genetics/metabolism ; Fungal Proteins/*genetics/physiology ; GTP Phosphohydrolases/genetics/physiology ; Genes, Fungal ; Genes, Suppressor ; *Genes, ras ; *Mitosis ; Mutation ; Phenotype ; Saccharomyces cerevisiae/*cytology/genetics/growth & development ; *Saccharomyces cerevisiae Proteins ; Signal Transduction ; Temperature ; *rab GTP-Binding Proteins ; ras Proteins/*genetics/physiology
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  • 9
    Publication Date: 1995-08-11
    Description: In the molecular scheme of living organisms, adenosine 3',5'-monophosphate (cyclic AMP or cAMP) has been a universal second messenger. In eukaryotic cells, the primary receptors for cAMP are the regulatory subunits of cAMP-dependent protein kinase. The crystal structure of a 1-91 deletion mutant of the type I alpha regulatory subunit was refined to 2.8 A resolution. Each of the two tandem cAMP binding domains provides an extensive network of hydrogen bonds that buries the cyclic phosphate and the ribose between two beta strands that are linked by a short alpha helix. Each adenine base stacks against an aromatic ring that lies outside the beta barrel. This structure provides a molecular basis for understanding how cAMP binds cooperatively to its receptor protein, thus mediating activation of the kinase.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Su, Y -- Dostmann, W R -- Herberg, F W -- Durick, K -- Xuong, N H -- Ten Eyck, L -- Taylor, S S -- Varughese, K I -- GM07313/GM/NIGMS NIH HHS/ -- GM34921/GM/NIGMS NIH HHS/ -- RR01644/RR/NCRR NIH HHS/ -- New York, N.Y. -- Science. 1995 Aug 11;269(5225):807-13.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Chemistry and Biochemistry, University of California, San Diego, La Jolla 92093-0654, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/7638597" target="_blank"〉PubMed〈/a〉
    Keywords: Affinity Labels ; Amino Acid Sequence ; Binding Sites ; Carrier Proteins/*chemistry/genetics/metabolism ; Computer Graphics ; Crystallization ; Crystallography, X-Ray ; Cyclic AMP/analogs & derivatives/*metabolism ; Cyclic AMP-Dependent Protein Kinases/*chemistry ; Enzyme Activation ; Hydrogen Bonding ; *Intracellular Signaling Peptides and Proteins ; Models, Molecular ; Molecular Sequence Data ; Mutation ; Protein Conformation ; Protein Folding ; Protein Structure, Secondary ; Protein Structure, Tertiary
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  • 10
    Publication Date: 1995-11-03
    Description: The BRCA1 gene product was identified as a 220-kilodalton nuclear phosphoprotein in normal cells, including breast ductal epithelial cells, and in 18 of 20 tumor cell lines derived from tissues other than breast and ovary. In 16 of 17 breast and ovarian cancer lines and 17 of 17 samples of cells obtained from malignant effusions, however, BRCA1 localized mainly in cytoplasm. Absence of BRCA1 or aberrant subcellular location was also observed to a variable extent in histological sections of many breast cancer biopsies. These findings suggest that BRCA1 abnormalities may be involved in the pathogenesis of many breast cancers, sporadic as well as familial.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Chen, Y -- Chen, C F -- Riley, D J -- Allred, D C -- Chen, P L -- Von Hoff, D -- Osborne, C K -- Lee, W H -- CA58318/CA/NCI NIH HHS/ -- EY05758/EY/NEI NIH HHS/ -- P50CA58183/CA/NCI NIH HHS/ -- New York, N.Y. -- Science. 1995 Nov 3;270(5237):789-91.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Center for Molecular Medicine/Institute of Biotechnology, University of Texas Health Science Center at San Antonio 78245, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/7481765" target="_blank"〉PubMed〈/a〉
    Keywords: Amino Acid Sequence ; BRCA1 Protein ; Base Sequence ; Breast/*chemistry ; Breast Neoplasms/*chemistry/ultrastructure ; Cell Fractionation ; Cell Line ; Cell Nucleus/chemistry ; Cytoplasm/*chemistry ; Female ; Humans ; Male ; Molecular Sequence Data ; Mutation ; Neoplasm Proteins/*analysis/genetics/metabolism ; Neoplasms/chemistry/ultrastructure ; Ovarian Neoplasms/chemistry/ultrastructure ; Pleural Effusion, Malignant/chemistry/pathology ; Transcription Factors/*analysis/genetics/metabolism ; Tumor Cells, Cultured
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