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  • Base Sequence
  • American Association for the Advancement of Science (AAAS)  (41)
  • American Association of Petroleum Geologists (AAPG)
  • 1995-1999  (41)
  • 1997  (41)
Collection
Publisher
  • American Association for the Advancement of Science (AAAS)  (41)
  • American Association of Petroleum Geologists (AAPG)
Years
  • 1995-1999  (41)
Year
  • 1
    Publication Date: 1997-03-21
    Description: The "Spanish" influenza pandemic killed at least 20 million people in 1918-1919, making it the worst infectious pandemic in history. Understanding the origins of the 1918 virus and the basis for its exceptional virulence may aid in the prediction of future influenza pandemics. RNA from a victim of the 1918 pandemic was isolated from a formalin-fixed, paraffin-embedded, lung tissue sample. Nine fragments of viral RNA were sequenced from the coding regions of hemagglutinin, neuraminidase, nucleoprotein, matrix protein 1, and matrix protein 2. The sequences are consistent with a novel H1N1 influenza A virus that belongs to the subgroup of strains that infect humans and swine, not the avian subgroup.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Taubenberger, J K -- Reid, A H -- Krafft, A E -- Bijwaard, K E -- Fanning, T G -- New York, N.Y. -- Science. 1997 Mar 21;275(5307):1793-6.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Division of Molecular Pathology, Department of Cellular Pathology, Armed Forces Institute of Pathology, Washington DC 20306-6000, USA. taubenbe@email.afip.osd.mil〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/9065404" target="_blank"〉PubMed〈/a〉
    Keywords: Algorithms ; Base Sequence ; *Genes, Viral ; Hemagglutinin Glycoproteins, Influenza Virus/genetics ; History, 20th Century ; Humans ; Influenza A virus/classification/*genetics/pathogenicity ; Influenza, Human/history/*virology ; Lung/virology ; Molecular Sequence Data ; Neuraminidase/genetics ; Nucleoproteins/genetics ; Phylogeny ; Polymerase Chain Reaction ; RNA, Viral/*genetics ; *RNA-Binding Proteins ; Viral Core Proteins/genetics ; Viral Matrix Proteins/genetics ; Virulence
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  • 2
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    American Association for the Advancement of Science (AAAS)
    Publication Date: 1997-05-23
    Description: During translation errors of aminoacylation are corrected in editing reactions which ensure that an amino acid is stably attached to its corresponding transfer RNA (tRNA). Previous studies have not shown whether the tRNA nucleotides needed for effecting translational editing are the same as or distinct from those required for aminoacylation, but several considerations have suggested that they are the same. Here, designed tRNAs that are highly active for aminoacylation but are not active in translational editing are presented. The editing reaction can be controlled by manipulation of nucleotides at the corner of the L-shaped tRNA. In contrast, these manipulations do not affect aminoacylation. These results demonstrate the segregation of nucleotide determinants for the editing and aminoacylation functions of tRNA.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Hale, S P -- Auld, D S -- Schmidt, E -- Schimmel, P -- GM15539/GM/NIGMS NIH HHS/ -- New York, N.Y. -- Science. 1997 May 23;276(5316):1250-2.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Biology, Massachusetts Institute of Technology, Cambridge, MA 02139, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/9157882" target="_blank"〉PubMed〈/a〉
    Keywords: Acetylation ; Base Sequence ; Binding Sites ; Cloning, Molecular ; Escherichia coli ; Molecular Sequence Data ; Nucleic Acid Conformation ; *RNA Editing ; RNA, Transfer/*metabolism ; RNA, Transfer, Ile/chemistry/metabolism ; RNA, Transfer, Val/chemistry/metabolism
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  • 3
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    American Association for the Advancement of Science (AAAS)
    Publication Date: 1997-01-31
    Description: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Lorimer, B G -- New York, N.Y. -- Science. 1997 Jan 31;275(5300):601-2.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/9019811" target="_blank"〉PubMed〈/a〉
    Keywords: Academies and Institutes ; Base Sequence ; DNA, Complementary/*genetics ; Databases, Factual ; *Genome, Human ; Humans ; Intellectual Property ; Publishing ; Research Support as Topic ; Sequence Analysis, DNA ; United States
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  • 4
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    American Association for the Advancement of Science (AAAS)
    Publication Date: 1997-08-22
    Description: Mutations in the SUPERMAN gene affect flower development in Arabidopsis. Seven heritable but unstable sup epi-alleles (the clark kent alleles) are associated with nearly identical patterns of excess cytosine methylation within the SUP gene and a decreased level of SUP RNA. Revertants of these alleles are largely demethylated at the SUP locus and have restored levels of SUP RNA. A transgenic Arabidopsis line carrying an antisense methyltransferase gene, which shows an overall decrease in genomic cytosine methylation, also contains a hypermethylated sup allele. Thus, disruption of methylation systems may yield more complex outcomes than expected and can result in methylation defects at known genes. The clark kent alleles differ from the antisense line because they do not show a general decrease in genomic methylation.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Jacobsen, S E -- Meyerowitz, E M -- New York, N.Y. -- Science. 1997 Aug 22;277(5329):1100-3.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Division of Biology 156-29, California Institute of Technology, Pasadena, CA 91125, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/9262479" target="_blank"〉PubMed〈/a〉
    Keywords: *Alleles ; Arabidopsis/*genetics/growth & development/metabolism ; *Arabidopsis Proteins ; Base Sequence ; Crosses, Genetic ; Cytosine/metabolism ; DNA (Cytosine-5-)-Methyltransferase/genetics ; *DNA Methylation ; DNA, Antisense ; DNA, Plant/metabolism ; Gene Expression Regulation, Plant ; *Genes, Plant ; Genetic Complementation Test ; Molecular Sequence Data ; Mutation ; Phenotype ; Plants, Genetically Modified ; RNA, Messenger/metabolism ; RNA, Plant/metabolism ; Transcription Factors/*genetics
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  • 5
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    American Association for the Advancement of Science (AAAS)
    Publication Date: 1997-11-14
    Description: Pathogenic Yersinia species have a specialized secretion system (type III) to target cytotoxic Yop proteins during infection. The signals of YopE and YopN sufficient for the secretion of translational reporter fusions were mapped to the first 15 codons. No common amino acid or peptide sequence could be identified among the secretion signals. Systematic mutagenesis of the secretion signal yielded mutants defective in Yop translation; however, no point mutants could be identified that specifically abolished secretion. Frameshift mutations that completely altered the peptide sequences of these signals also failed to prevent secretion. Thus, the signal that leads to the type III secretion of Yop proteins appears to be encoded in their messenger RNA rather than the peptide sequence.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Anderson, D M -- Schneewind, O -- AI 07323/AI/NIAID NIH HHS/ -- New York, N.Y. -- Science. 1997 Nov 7;278(5340):1140-3.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Microbiology and Immunology, Molecular Biology Institute, University of California, Los Angeles, School of Medicine, 10833 Le Conte Avenue, Los Angeles, CA 90095, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/9353199" target="_blank"〉PubMed〈/a〉
    Keywords: Amino Acid Sequence ; Bacterial Outer Membrane Proteins/chemistry/genetics/*secretion ; Bacterial Proteins/chemistry/genetics/*secretion ; Base Sequence ; Codon ; Frameshift Mutation ; *Membrane Proteins ; Molecular Sequence Data ; Mutation ; Nucleic Acid Conformation ; Point Mutation ; Protein Biosynthesis ; RNA, Bacterial/chemistry/*genetics/metabolism ; RNA, Messenger/chemistry/*genetics/metabolism ; Recombinant Fusion Proteins/biosynthesis/secretion ; Yersinia enterocolitica/*metabolism/pathogenicity
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  • 6
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    American Association for the Advancement of Science (AAAS)
    Publication Date: 1997-04-11
    Description: The use of molecular phylogenies to examine evolutionary questions has become commonplace with the automation of DNA sequencing and the availability of efficient computer programs to perform phylogenetic analyses. The application of computer simulation and likelihood ratio tests to evolutionary hypotheses represents a recent methodological development in this field. Likelihood ratio tests have enabled biologists to address many questions in evolutionary biology that have been difficult to resolve in the past, such as whether host-parasite systems are cospeciating and whether models of DNA substitution adequately explain observed sequences.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Huelsenbeck, J P -- Rannala, B -- GM40282/GM/NIGMS NIH HHS/ -- New York, N.Y. -- Science. 1997 Apr 11;276(5310):227-32.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Integrative Biology, University of California, Berkeley, CA 94720, USA. john@mws4.biol.berkeley.edu〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/9092465" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Base Sequence ; *Biological Evolution ; Computer Simulation ; *DNA/genetics ; Electron Transport Complex IV/genetics ; *Evolution, Molecular ; Hantavirus/genetics ; Likelihood Functions ; Mutation ; Phthiraptera/genetics ; *Phylogeny ; RNA, Viral/genetics ; Rodentia/genetics
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  • 7
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    American Association for the Advancement of Science (AAAS)
    Publication Date: 1997-05-23
    Description: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Marshall, E -- New York, N.Y. -- Science. 1997 May 23;276(5316):1189-90.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/9182326" target="_blank"〉PubMed〈/a〉
    Keywords: Base Sequence ; Computer Communication Networks ; *Dna ; Europe ; Germany ; Humans ; *Information Dissemination ; Intellectual Property ; *Internationality ; *Patents as Topic ; Time Factors ; United States
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  • 8
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    American Association for the Advancement of Science (AAAS)
    Publication Date: 1997-01-17
    Description: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Warren, S T -- New York, N.Y. -- Science. 1997 Jan 17;275(5298):408-9.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/9005557" target="_blank"〉PubMed〈/a〉
    Keywords: Alleles ; Amino Acid Sequence ; Base Sequence ; *Crossing Over, Genetic ; Homeodomain Proteins/chemistry/*genetics ; Humans ; Molecular Sequence Data ; Mutation ; Peptides/analysis/*genetics ; Polydactyly/*genetics ; Syndactyly/*genetics ; *Transcription Factors ; Trinucleotide Repeats
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  • 9
    Publication Date: 1997-06-27
    Description: Individual plastids of vascular plants have generally been considered to be discrete autonomous entities that do not directly communicate with each other. However, in transgenic plants in which the plastid stroma was labeled with green fluorescent protein (GFP), thin tubular projections emanated from individual plastids and sometimes connected to other plastids. Flow of GFP between interconnected plastids could be observed when a single plastid or an interconnecting plastid tubule was photobleached and the loss of green fluorescence by both plastids was seen. These tubules allow the exchange of molecules within an interplastid communication system, which may facilitate the coordination of plastid activities.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Kohler, R H -- Cao, J -- Zipfel, W R -- Webb, W W -- Hanson, M R -- R07719/PHS HHS/ -- RR04224/RR/NCRR NIH HHS/ -- New York, N.Y. -- Science. 1997 Jun 27;276(5321):2039-42.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Section of Genetics and Development, Cornell University, Biotechnology Building, Ithaca, NY 14853-2703, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/9197266" target="_blank"〉PubMed〈/a〉
    Keywords: Amino Acid Sequence ; Base Sequence ; Chloroplasts/*metabolism/*ultrastructure ; Cytoplasm/metabolism ; Green Fluorescent Proteins ; Luminescent Proteins/*metabolism ; Microscopy/methods ; Microscopy, Fluorescence ; Molecular Sequence Data ; Plant Leaves/*ultrastructure ; Plants, Genetically Modified ; Plants, Toxic ; Recombinant Fusion Proteins/metabolism ; Tobacco
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  • 10
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    American Association for the Advancement of Science (AAAS)
    Publication Date: 1997-08-08
    Description: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Ehrenstein, D -- New York, N.Y. -- Science. 1997 Aug 8;277(5327):762.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/9273696" target="_blank"〉PubMed〈/a〉
    Keywords: Base Sequence ; Chromosome Mapping ; *Computer Communication Networks ; *Databases, Factual ; *Genes ; Genome, Human ; Humans ; National Institutes of Health (U.S.) ; National Library of Medicine (U.S.) ; Neoplasms/*genetics ; United States
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  • 11
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    American Association for the Advancement of Science (AAAS)
    Publication Date: 1997-05-02
    Description: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Morell, V -- New York, N.Y. -- Science. 1997 May 2;276(5313):699-702.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/9157549" target="_blank"〉PubMed〈/a〉
    Keywords: Archaea/*classification/genetics/physiology ; Bacteria/*classification/genetics ; Base Sequence ; Biological Evolution ; History, 20th Century ; Origin of Life ; *Phylogeny ; RNA, Bacterial/genetics ; RNA, Ribosomal/genetics ; Sequence Analysis, RNA ; Temperature ; United States
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  • 12
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    American Association for the Advancement of Science (AAAS)
    Publication Date: 1997-04-25
    Description: A population of RNA molecules that catalyze the template-directed ligation of RNA substrates was made to evolve in a continuous manner in the test tube. A simple serial transfer procedure was used to achieve approximately 300 successive rounds of catalysis and selective amplification in 52 hours. During this time, the population size was maintained against an overall dilution of 3 x 10(298). Both the catalytic rate and amplification rate of the RNAs improved substantially as a consequence of mutations that accumulated during the evolution process. Continuous in vitro evolution makes it possible to maintain laboratory "cultures" of catalytic molecules that can be perpetuated indefinitely.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Wright, M C -- Joyce, G F -- New York, N.Y. -- Science. 1997 Apr 25;276(5312):614-7.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Chemistry, The 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/9110984" target="_blank"〉PubMed〈/a〉
    Keywords: Base Sequence ; Catalysis ; DNA-Directed RNA Polymerases/genetics/metabolism ; *Directed Molecular Evolution ; Evolution, Molecular ; Molecular Sequence Data ; Mutation ; Nucleic Acid Conformation ; Promoter Regions, Genetic ; *RNA, Catalytic/chemistry/genetics/metabolism ; Saccharomyces cerevisiae/chemistry ; Templates, Genetic ; Transcription, Genetic ; Viral Proteins
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  • 13
    Publication Date: 1997-07-11
    Description: An integrated human-mouse positional candidate approach was used to identify the gene responsible for the phenotypes observed in a mouse model of Niemann-Pick type C (NP-C) disease. The predicted murine NPC1 protein has sequence homology to the putative transmembrane domains of the Hedgehog signaling molecule Patched, to the cholesterol-sensing regions of 3-hydroxy-3-methylglutaryl coenzyme A (HMG-CoA) reductase and SREBP cleavage-activating protein (SCAP), and to the NPC1 orthologs identified in human, the nematode Caenorhabditis elegans, and the yeast Saccharomyces cerevisiae. The mouse model may provide an important resource for studying the role of NPC1 in cholesterol homeostasis and neurodegeneration and for assessing the efficacy of new drugs for NP-C disease.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Loftus, S K -- Morris, J A -- Carstea, E D -- Gu, J Z -- Cummings, C -- Brown, A -- Ellison, J -- Ohno, K -- Rosenfeld, M A -- Tagle, D A -- Pentchev, P G -- Pavan, W J -- New York, N.Y. -- Science. 1997 Jul 11;277(5323):232-5.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Laboratory of Genetic Disease Research, National Human Genome Research Institute, National Institutes of Health (NIH), Bethesda, MD 20892, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/9211850" target="_blank"〉PubMed〈/a〉
    Keywords: Amino Acid Sequence ; Animals ; Base Sequence ; Cholesterol/*metabolism ; *Disease Models, Animal ; Homeostasis ; Humans ; Hydroxymethylglutaryl CoA Reductases/chemistry ; Intracellular Signaling Peptides and Proteins ; Lysosomes/metabolism ; Membrane Proteins/chemistry ; Mice ; Mice, Inbred BALB C ; Mice, Inbred C57BL ; Mice, Mutant Strains ; Molecular Sequence Data ; Mutation ; Niemann-Pick Diseases/*genetics/metabolism ; Phenotype ; Protein Sorting Signals/chemistry ; Proteins/chemistry/*genetics/physiology ; Sequence Homology, Amino Acid
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  • 14
    Publication Date: 1997-11-21
    Description: The gene responsible for autosomal dominant, fully penetrant, nonsyndromic sensorineural progressive hearing loss in a large Costa Rican kindred was previously localized to chromosome 5q31 and named DFNA1. Deafness in the family is associated with a protein-truncating mutation in a human homolog of the Drosophila gene diaphanous. The truncation is caused by a single nucleotide substitution in a splice donor, leading to a four-base pair insertion in messenger RNA and a frameshift. The diaphanous protein is a profilin ligand and target of Rho that regulates polymerization of actin, the major component of the cytoskeleton of hair cells of the inner ear.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Lynch, E D -- Lee, M K -- Morrow, J E -- Welcsh, P L -- Leon, P E -- King, M C -- R01-DC01076/DC/NIDCD NIH HHS/ -- New York, N.Y. -- Science. 1997 Nov 14;278(5341):1315-8.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Medicine, University of Washington, Seattle, WA 98195, USA. eric@lynch.com〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/9360932" target="_blank"〉PubMed〈/a〉
    Keywords: Actins/*metabolism ; *Adaptor Proteins, Signal Transducing ; Amino Acid Sequence ; Animals ; Base Sequence ; Carrier Proteins/chemistry/*genetics/physiology ; Chromosome Mapping ; Chromosomes, Human, Pair 5 ; Cochlea/metabolism ; *Contractile Proteins ; Deafness/*genetics/metabolism/pathology ; Drosophila/genetics ; *Drosophila Proteins ; Female ; Frameshift Mutation ; GTP-Binding Proteins/metabolism ; Gene Expression ; Hair Cells, Auditory/*metabolism/ultrastructure ; Humans ; Male ; Microfilament Proteins/metabolism ; Molecular Sequence Data ; Pedigree ; Profilins ; RNA Splicing ; RNA, Messenger/genetics/metabolism ; X Chromosome
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  • 15
    Publication Date: 1997-02-14
    Description: Cancers of the microsatellite mutator phenotype (MMP) show exaggerated genomic instability at simple repeat sequences. More than 50 percent (21 out of 41) of human MMP+ colon adenocarcinomas examined were found to have frameshift mutations in a tract of eight deoxyguanosines [(G)8] within BAX, a gene that promotes apoptosis. These mutations were absent in MMP- tumors and were significantly less frequent in (G)8 repeats from other genes. Frameshift mutations were present in both BAX alleles in some MMP+ colon tumor cell lines and in primary tumors. These results suggest that inactivating BAX mutations are selected for during the progression of colorectal MMP+ tumors and that the wild-type BAX gene plays a suppressor role in a p53-independent pathway for colorectal carcinogenesis.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Rampino, N -- Yamamoto, H -- Ionov, Y -- Li, Y -- Sawai, H -- Reed, J C -- Perucho, M -- CA38579/CA/NCI NIH HHS/ -- CA63585/CA/NCI NIH HHS/ -- New York, N.Y. -- Science. 1997 Feb 14;275(5302):967-9.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉The Burnham Institute, La Jolla Cancer Research Center, 10901 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/9020077" target="_blank"〉PubMed〈/a〉
    Keywords: Adenocarcinoma/*genetics ; Alleles ; Apoptosis ; Base Sequence ; Colonic Neoplasms/*genetics ; *Frameshift Mutation ; Gene Expression ; *Genes, Tumor Suppressor ; Humans ; Microsatellite Repeats/*genetics ; Molecular Sequence Data ; Mutation ; Phenotype ; Polymerase Chain Reaction ; Proto-Oncogene Proteins/*genetics ; *Proto-Oncogene Proteins c-bcl-2 ; Sequence Deletion ; Tumor Cells, Cultured ; bcl-2-Associated X Protein
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  • 16
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    American Association for the Advancement of Science (AAAS)
    Publication Date: 1997-08-22
    Description: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Marshall, E -- New York, N.Y. -- Science. 1997 Aug 22;277(5329):1028-30.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/9289846" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Base Sequence ; California ; *Cloning, Molecular ; DNA, Recombinant ; Drug Industry ; *Genetic Research ; *Genetic Vectors ; Guideline Adherence/legislation & jurisprudence ; Humans ; Insulin/*genetics ; National Institutes of Health (U.S.) ; *Patents as Topic ; *Plasmids ; Rats ; Recombinant Proteins ; Scientific Misconduct/*legislation & jurisprudence ; United States ; Universities
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  • 17
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    American Association for the Advancement of Science (AAAS)
    Publication Date: 1997-06-13
    Description: Intron excision is an essential step in eukaryotic gene expression, but the molecular mechanisms by which the spliceosome accurately identifies splice sites in nuclear precursors to messenger RNAs (pre-mRNAs) are not well understood. A bimolecular assay for the second step of splicing has now revealed that exon ligation by the human spliceosome does not require covalent attachment of a 3' splice site to the branch site. Furthermore, accurate definition of the 3' splice site in this system is independent of either a covalently attached polypyrimidine tract or specific 3' exon sequences. Rather, in this system 3' splice site selection apparently occurs with a 5' --〉 3' directionality.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Anderson, K -- Moore, M J -- GM53007/GM/NIGMS NIH HHS/ -- New York, N.Y. -- Science. 1997 Jun 13;276(5319):1712-6.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉W. M. Keck Institute for Cellular Visualization, Department of Biochemistry, Brandeis University, Waltham, MA 02254, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/9180084" target="_blank"〉PubMed〈/a〉
    Keywords: Adenoviridae/genetics ; Base Sequence ; Binding Sites ; *Exons ; Humans ; Introns ; Molecular Sequence Data ; Nucleic Acid Conformation ; RNA Precursors/genetics/*metabolism ; *RNA Splicing ; Spliceosomes/*metabolism
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  • 18
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    American Association for the Advancement of Science (AAAS)
    Publication Date: 1997-05-16
    Description: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Balter, M -- New York, N.Y. -- Science. 1997 May 16;276(5315):1032-4.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/9173539" target="_blank"〉PubMed〈/a〉
    Keywords: Amino Acid Sequence ; Amphibians/*classification/genetics ; Animals ; Base Sequence ; Biological Evolution ; DNA, Mitochondrial/genetics ; Humans ; Mammals/*classification/genetics ; *Phylogeny
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  • 19
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    American Association for the Advancement of Science (AAAS)
    Publication Date: 1997-07-25
    Description: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Williams, N -- New York, N.Y. -- Science. 1997 Jul 25;277(5325):478.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/9254420" target="_blank"〉PubMed〈/a〉
    Keywords: Bacillus subtilis/*genetics ; Base Sequence ; DNA, Bacterial/genetics ; DNA, Circular/genetics ; European Union ; *Genome, Bacterial ; International Cooperation ; Japan ; *Sequence Analysis, DNA
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  • 20
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    American Association for the Advancement of Science (AAAS)
    Publication Date: 1997-02-21
    Description: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Gibbons, A -- New York, N.Y. -- Science. 1997 Feb 21;275(5303):1068.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/9054008" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Base Composition ; Base Sequence ; *Biological Evolution ; *Birds/genetics ; DNA, Mitochondrial/genetics ; Evolution, Molecular ; *Fossils ; *Genes ; Mutation ; Phylogeny
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  • 21
    Publication Date: 1997-11-21
    Description: The Janus family of tyrosine kinases (JAK) plays an essential role in development and in coupling cytokine receptors to downstream intracellular signaling events. A t(9;12)(p24;p13) chromosomal translocation in a T cell childhood acute lymphoblastic leukemia patient was characterized and shown to fuse the 3' portion of JAK2 to the 5' region of TEL, a gene encoding a member of the ETS transcription factor family. The TEL-JAK2 fusion protein includes the catalytic domain of JAK2 and the TEL-specific oligomerization domain. TEL-induced oligomerization of TEL-JAK2 resulted in the constitutive activation of its tyrosine kinase activity and conferred cytokine-independent proliferation to the interleukin-3-dependent Ba/F3 hematopoietic cell line.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Lacronique, V -- Boureux, A -- Valle, V D -- Poirel, H -- Quang, C T -- Mauchauffe, M -- Berthou, C -- Lessard, M -- Berger, R -- Ghysdael, J -- Bernard, O A -- New York, N.Y. -- Science. 1997 Nov 14;278(5341):1309-12.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉U 301 de l'Institut National de la Sante et de la Recherche Medicale and SD 401 No. 301 CNRS, Institut de Genetique Moleculaire, 27 rue Juliette Dodu, 75010 Paris, France.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/9360930" target="_blank"〉PubMed〈/a〉
    Keywords: Amino Acid Sequence ; Animals ; Base Sequence ; Biopolymers ; Cell Division ; Cell Line ; Child, Preschool ; DNA-Binding Proteins/chemistry/genetics/metabolism ; Enzyme Activation ; Humans ; Interleukin-3/physiology ; Janus Kinase 2 ; Leukemia-Lymphoma, Adult T-Cell/genetics/*metabolism ; Male ; Mice ; *Milk Proteins ; Molecular Sequence Data ; Oncogene Proteins, Fusion/chemistry/genetics/*metabolism ; Phosphorylation ; Protein-Tyrosine Kinases/chemistry/genetics/*metabolism ; *Proto-Oncogene Proteins ; Proto-Oncogene Proteins c-ets ; *Repressor Proteins ; STAT5 Transcription Factor ; Signal Transduction ; Trans-Activators/metabolism ; Transcription Factors/chemistry/genetics/metabolism ; Transfection ; Translocation, Genetic
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  • 22
    Publication Date: 1997-01-31
    Description: Glaucoma is a major cause of blindness and is characterized by progressive degeneration of the optic nerve and is usually associated with elevated intraocular pressure. Analyses of sequence tagged site (STS) content and haplotype sharing between families affected with chromosome 1q-linked open angle glaucoma (GLC1A) were used to prioritize candidate genes for mutation screening. A gene encoding a trabecular meshwork protein (TIGR) mapped to the narrowest disease interval by STS content and radiation hybrid mapping. Thirteen glaucoma patients were found to have one of three mutations in this gene (3.9 percent of the population studied). One of these mutations was also found in a control individual (0.2 percent). Identification of these mutations will aid in early diagnosis, which is essential for optimal application of existing therapies.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Stone, E M -- Fingert, J H -- Alward, W L -- Nguyen, T D -- Polansky, J R -- Sunden, S L -- Nishimura, D -- Clark, A F -- Nystuen, A -- Nichols, B E -- Mackey, D A -- Ritch, R -- Kalenak, J W -- Craven, E R -- Sheffield, V C -- EY02477/EY/NEI NIH HHS/ -- EY08905/EY/NEI NIH HHS/ -- EY10564/EY/NEI NIH HHS/ -- etc. -- New York, N.Y. -- Science. 1997 Jan 31;275(5300):668-70.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Ophthalmology, University of Iowa College of Medicine, Iowa City, IA 52242, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/9005853" target="_blank"〉PubMed〈/a〉
    Keywords: Base Sequence ; Chromosome Mapping ; Chromosomes, Artificial, Yeast ; *Chromosomes, Human, Pair 1 ; Cytoskeletal Proteins ; Eye Proteins/*genetics ; Female ; Genetic Linkage ; Glaucoma, Open-Angle/*genetics ; *Glycoproteins ; Haplotypes ; Humans ; Male ; Molecular Sequence Data ; Mutation ; Pedigree ; Polymerase Chain Reaction ; Polymorphism, Single-Stranded Conformational ; Sequence Tagged Sites ; Trabecular Meshwork/*metabolism
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  • 23
    Publication Date: 1997-01-31
    Description: A method is described for selecting DNA-binding proteins that recognize desired sequences. The protocol involves gradually extending a new zinc finger protein across the desired 9- or 10-base pair target site, adding and optimizing one finger at a time. This procedure was tested with a TATA box, a p53 binding site, and a nuclear receptor element, and proteins were obtained that bind with nanomolar dissociation constants and discriminate effectively (greater than 20,000-fold) against nonspecific DNA. This strategy may provide important information about protein-DNA recognition as well as powerful tools for biomedical research.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Greisman, H A -- Pabo, C O -- New York, N.Y. -- Science. 1997 Jan 31;275(5300):657-61.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Howard Hughes Medical Institute and Department of Biology, Massachusetts Institute of Technology, Cambridge, MA 02139, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/9005850" target="_blank"〉PubMed〈/a〉
    Keywords: Amino Acid Sequence ; Base Composition ; Base Sequence ; Binding Sites ; DNA/*metabolism ; DNA-Binding Proteins/chemistry/*metabolism ; Genes, p53 ; Hydrogen Bonding ; Models, Molecular ; Molecular Sequence Data ; Nucleic Acid Conformation ; Peptide Library ; Protein Conformation ; *Protein Engineering ; Protein Structure, Secondary ; Receptors, Cytoplasmic and Nuclear/genetics ; TATA Box ; Transcription Factors/chemistry/metabolism ; *Zinc Fingers
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  • 24
    Publication Date: 1997-11-21
    Description: The wild-type Caenorhabditis elegans nematode ages rapidly, undergoing development, senescence, and death in less than 3 weeks. In contrast, mutants with reduced activity of the gene daf-2, a homolog of the insulin and insulin-like growth factor receptors, age more slowly than normal and live more than twice as long. These mutants are active and fully fertile and have normal metabolic rates. The life-span extension caused by daf-2 mutations requires the activity of the gene daf-16. daf-16 appears to play a unique role in life-span regulation and encodes a member of the hepatocyte nuclear factor 3 (HNF-3)/forkhead family of transcriptional regulators. In humans, insulin down-regulates the expression of certain genes by antagonizing the activity of HNF-3, raising the possibility that aspects of this regulatory system have been conserved.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Lin, K -- Dorman, J B -- Rodan, A -- Kenyon, C -- AG11816/AG/NIA NIH HHS/ -- New York, N.Y. -- Science. 1997 Nov 14;278(5341):1319-22.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Biochemistry and Biophysics, University of California, San Francisco, CA 94143-0554, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/9360933" target="_blank"〉PubMed〈/a〉
    Keywords: Aging/genetics ; Amino Acid Sequence ; Animals ; Base Sequence ; Caenorhabditis elegans/*genetics/physiology ; *Caenorhabditis elegans Proteins ; Cloning, Molecular ; DNA, Complementary ; Forkhead Transcription Factors ; Genes, Helminth ; Humans ; Insulin/physiology ; Longevity/genetics ; Molecular Sequence Data ; Mutation ; Nuclear Proteins/genetics ; Phenotype ; Receptor, Insulin/genetics/physiology ; Sequence Alignment ; Somatomedins/physiology ; Transcription Factors/chemistry/*genetics/*physiology
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  • 25
    Publication Date: 1997-06-27
    Description: Parkinson's disease (PD) is a common neurodegenerative disorder with a lifetime incidence of approximately 2 percent. A pattern of familial aggregation has been documented for the disorder, and it was recently reported that a PD susceptibility gene in a large Italian kindred is located on the long arm of human chromosome 4. A mutation was identified in the alpha-synuclein gene, which codes for a presynaptic protein thought to be involved in neuronal plasticity, in the Italian kindred and in three unrelated families of Greek origin with autosomal dominant inheritance for the PD phenotype. This finding of a specific molecular alteration associated with PD will facilitate the detailed understanding of the pathophysiology of the disorder.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Polymeropoulos, M H -- Lavedan, C -- Leroy, E -- Ide, S E -- Dehejia, A -- Dutra, A -- Pike, B -- Root, H -- Rubenstein, J -- Boyer, R -- Stenroos, E S -- Chandrasekharappa, S -- Athanassiadou, A -- Papapetropoulos, T -- Johnson, W G -- Lazzarini, A M -- Duvoisin, R C -- Di Iorio, G -- Golbe, L I -- Nussbaum, R L -- New York, N.Y. -- Science. 1997 Jun 27;276(5321):2045-7.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Laboratory of Genetic Disease Research, National Human Genome Research Institute, National Institutes of Health, Bethesda, MD 20892-1430, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/9197268" target="_blank"〉PubMed〈/a〉
    Keywords: Age of Onset ; Amino Acid Sequence ; Animals ; Base Sequence ; Chromosome Mapping ; Chromosomes, Human, Pair 4 ; Female ; Genes, Dominant ; Genetic Markers ; Greece ; Humans ; Italy ; Male ; Molecular Sequence Data ; Nerve Tissue Proteins/chemistry/*genetics/physiology ; Parkinson Disease/*genetics ; Pedigree ; Phenotype ; *Point Mutation ; Polymerase Chain Reaction ; Protein Structure, Secondary ; Synucleins ; alpha-Synuclein
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  • 26
    Publication Date: 1997-07-04
    Description: The steady state of histone acetylation is established and maintained by multiple histone acetyltransferases and deacetylases, and this steady state affects chromatin structure and function. The identification of a maize complementary DNA encoding the chromatin-bound deacetylase HD2 is reported. This protein was not homologous to the yeast RPD3 transcriptional regulator. It was expressed throughout embryo germination in correlation with the proliferative activity of cells. Antibodies against recombinant HD2-p39 immunoprecipitated the native enzyme complex, which was composed of phosphorylated p39 subunits. Immunofluorescence microscopy and sequence homologies suggested nucleolar localization. HD2 is an acidic nucleolar phosphoprotein that might regulate ribosomal chromatin structure and function.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Lusser, A -- Brosch, G -- Loidl, A -- Haas, H -- Loidl, P -- New York, N.Y. -- Science. 1997 Jul 4;277(5322):88-91.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Microbiology, University of Innsbruck Medical School, Fritz-Pregl-Str. 3, A-6020 Innsbruck, Austria.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/9204905" target="_blank"〉PubMed〈/a〉
    Keywords: Acetylation ; Amino Acid Sequence ; Base Sequence ; Cell Nucleolus/*enzymology ; Chromatin/metabolism ; Cloning, Molecular ; DNA, Complementary ; Germination ; Histone Deacetylases/*chemistry/genetics/isolation & purification/*metabolism ; Histones/metabolism ; Hydrogen-Ion Concentration ; Molecular Sequence Data ; Phosphoproteins/*chemistry/metabolism ; Phosphorylation ; RNA, Messenger/genetics/metabolism ; RNA, Plant/genetics/metabolism ; Recombinant Fusion Proteins/chemistry/metabolism ; Seeds/enzymology ; Zea mays/embryology/*enzymology
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  • 27
    Publication Date: 1997-10-24
    Description: Ancient duplications and rearrangements of protein-coding segments have resulted in complex gene family relationships. Duplications can be tandem or dispersed and can involve entire coding regions or modules that correspond to folded protein domains. As a result, gene products may acquire new specificities, altered recognition properties, or modified functions. Extreme proliferation of some families within an organism, perhaps at the expense of other families, may correspond to functional innovations during evolution. The underlying processes are still at work, and the large fraction of human and other genomes consisting of transposable elements may be a manifestation of the evolutionary benefits of genomic flexibility.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Henikoff, S -- Greene, E A -- Pietrokovski, S -- Bork, P -- Attwood, T K -- Hood, L -- GM29009/GM/NIGMS NIH HHS/ -- New York, N.Y. -- Science. 1997 Oct 24;278(5338):609-14.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Fred Hutchinson Cancer Research Center and Howard Hughes Medical Institute, Seattle, WA 98109-1024, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/9381171" target="_blank"〉PubMed〈/a〉
    Keywords: Amino Acid Sequence ; Animals ; Base Sequence ; Computer Communication Networks ; Databases as Topic ; Evolution, Molecular ; Genetic Variation ; Humans ; *Multigene Family ; Phylogeny ; Proteins/chemistry/classification/*genetics/physiology ; Repetitive Sequences, Nucleic Acid
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  • 28
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    American Association for the Advancement of Science (AAAS)
    Publication Date: 1997-02-21
    Description: The extent of terrestrial vertebrate extinctions at the end of the Cretaceous is poorly understood, and estimates have ranged from a mass extinction to limited extinctions of specific groups. Molecular and paleontological data demonstrate that modern bird orders started diverging in the Early Cretaceous; at least 22 avian lineages of modern birds cross the Cretaceous-Tertiary boundary. Data for several other terrestrial vertebrate groups indicate a similar pattern of survival and, taken together, favor incremental changes during a Cretaceous diversification of birds and mammals rather than an explosive radiation in the Early Tertiary.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Cooper, A -- Penny, D -- New York, N.Y. -- Science. 1997 Feb 21;275(5303):1109-13.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉School of Biological Sciences, Victoria University of Wellington, Wellington, New Zealand. alan.cooper@bioanth.ox.ac.uk〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/9027308" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Base Sequence ; *Biological Evolution ; *Birds/genetics ; Evolution, Molecular ; *Fossils ; *Genes ; Genes, mos ; Mammals/genetics ; Mitochondria/genetics ; Molecular Sequence Data ; Phylogeny ; RNA, Ribosomal/genetics
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  • 29
    Publication Date: 1997-06-13
    Description: Mitochondrial DNA control region sequences were analyzed from 162 wolves at 27 localities worldwide and from 140 domestic dogs representing 67 breeds. Sequences from both dogs and wolves showed considerable diversity and supported the hypothesis that wolves were the ancestors of dogs. Most dog sequences belonged to a divergent monophyletic clade sharing no sequences with wolves. The sequence divergence within this clade suggested that dogs originated more than 100,000 years before the present. Associations of dog haplotypes with other wolf lineages indicated episodes of admixture between wolves and dogs. Repeated genetic exchange between dog and wolf populations may have been an important source of variation for artificial selection.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Vila, C -- Savolainen, P -- Maldonado, J E -- Amorim, I R -- Rice, J E -- Honeycutt, R L -- Crandall, K A -- Lundeberg, J -- Wayne, R K -- New York, N.Y. -- Science. 1997 Jun 13;276(5319):1687-9.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Biology, University of California, Los Angeles, CA 90095-1606, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/9180076" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Base Sequence ; *Biological Evolution ; Breeding ; Carnivora/*genetics ; Crosses, Genetic ; DNA, Mitochondrial/*genetics ; Dogs/classification/*genetics ; Female ; Haplotypes ; Male ; Molecular Sequence Data ; Phylogeny ; Sequence Homology, Nucleic Acid
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  • 30
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    American Association for the Advancement of Science (AAAS)
    Publication Date: 1997-02-28
    Description: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Marshall, E -- New York, N.Y. -- Science. 1997 Feb 28;275(5304):1263.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/9064781" target="_blank"〉PubMed〈/a〉
    Keywords: Base Sequence ; DNA/genetics ; *Genes ; HIV Infections/virology ; Humans ; Membrane Proteins/genetics ; *Patents as Topic ; Receptors, CCR5 ; Receptors, CXCR4 ; Receptors, Cytokine/*genetics ; Receptors, HIV/*genetics ; United States
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  • 31
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    American Association for the Advancement of Science (AAAS)
    Publication Date: 1997-06-20
    Description: The plant hormone auxin regulates plant physiology by modulating the interaction of transcription factors with auxin response elements (AuxREs) of the affected genes. A transcription factor, Auxin Response Factor 1 (ARF1), that binds to the sequence TGTCTC in AuxREs was cloned from Arabidopsis by using a yeast one-hybrid system. ARF1 has an amino-terminal DNA-binding domain related to the carboxyl terminus of the maize transactivator Viviparous-1. Sequence requirements for ARF1 binding in vitro are identical to those that confer auxin responsiveness in vivo. The carboxyl terminus of ARF1 contains two motifs found in the Aux/IAA class of proteins and appears to mediate protein-protein interactions.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Ulmasov, T -- Hagen, G -- Guilfoyle, T J -- New York, N.Y. -- Science. 1997 Jun 20;276(5320):1865-8.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Biochemistry, University of Missouri, 117 Schweitzer Hall, Columbia, MO 65211, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/9188533" target="_blank"〉PubMed〈/a〉
    Keywords: Amino Acid Sequence ; Arabidopsis/genetics ; Arabidopsis Proteins ; Base Sequence ; Binding Sites ; Cloning, Molecular ; DNA, Plant/genetics/*metabolism ; DNA-Binding Proteins/chemistry/genetics/*metabolism ; Genes, Plant ; Indoleacetic Acids/*pharmacology ; Molecular Sequence Data ; Mutation ; Plant Proteins ; *Promoter Regions, Genetic ; *Repetitive Sequences, Nucleic Acid ; Transcription Factors/chemistry/genetics/*metabolism
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  • 32
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    American Association for the Advancement of Science (AAAS)
    Publication Date: 1997-09-20
    Description: To adhere to solid surfaces, marine mussels produce byssal threads, each of which is a stiff tether at one end and a shock absorber with 160 percent extensibility at the other end. The elastic extensibility of proximal byssus is extraordinary given its construction of collagen and the limited extension (less than 10 percent) of most collagenous materials. From the complementary DNA, we deduced that the primary structure of a collagenous protein (preCol-P) predominating in the extensible proximal portion of the threads encodes an unprecedented natural block copolymer with three major domain types: a central collagen domain, flanking elastic domains, and histidine-rich terminal domains. The elastic domains have sequence motifs that strongly resemble those of elastin and the amorphous glycine-rich regions of spider silk fibroins. Byssal thread extensibility may be imparted by the elastic domains of preCol-P.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Coyne, K J -- Qin, X X -- Waite, J H -- New York, N.Y. -- Science. 1997 Sep 19;277(5333):1830-2.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉College of Marine Studies and Department of Chemistry and Biochemistry, University of Delaware, Newark, DE 19716, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/9295275" target="_blank"〉PubMed〈/a〉
    Keywords: Alanine/chemistry ; Amino Acid Sequence ; Animals ; Base Sequence ; Biopolymers/chemistry ; Bivalvia/*chemistry/genetics ; Collagen/*chemistry/genetics ; DNA, Complementary ; Elasticity ; Elastin/chemistry/genetics ; Fibroins/chemistry ; Glycine/chemistry ; Histidine/chemistry ; Molecular Sequence Data ; Proline/chemistry ; Protein Conformation ; Protein Precursors/*chemistry/genetics ; Protein Structure, Secondary ; Sequence Alignment ; Serine/chemistry
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  • 33
    Publication Date: 1997-05-16
    Description: In many organisms, pattern formation in the embryo develops from the polarized distributions of messenger RNAs (mRNAs) in the egg. In Xenopus, the mRNA encoding Vg1, a growth factor involved in mesoderm induction, is localized to the vegetal cortex of oocytes. A protein named Vera was shown to be involved in Vg1 mRNA localization. Vera cofractionates with endoplasmic reticulum (ER) membranes, and endogenous Vg1 mRNA is associated with a subcompartment of the ER. Vera may promote mRNA localization in Xenopus oocytes by mediating an interaction between the Vg1 3' untranslated region and the ER subcompartment.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Deshler, J O -- Highett, M I -- Schnapp, B J -- GM16114-03/GM/NIGMS NIH HHS/ -- NS-26846/NS/NINDS NIH HHS/ -- New York, N.Y. -- Science. 1997 May 16;276(5315):1128-31.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Cell Biology, Harvard Medical School, 240 Longwood Avenue, Boston, MA 02115, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/9148809" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Base Sequence ; Biological Transport ; Endoplasmic Reticulum/*metabolism ; Glycoproteins/*genetics ; Molecular Sequence Data ; Mutation ; Oocytes/*metabolism ; Oogenesis ; Protein Binding ; Proteins/*metabolism ; RNA, Messenger/genetics/*metabolism ; Repetitive Sequences, Nucleic Acid ; Transforming Growth Factor beta/*genetics ; Xenopus Proteins ; Xenopus laevis
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    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
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  • 34
    Publication Date: 1997-02-28
    Description: The molecular mechanisms that link cell-cycle controls to the mitotic apparatus are poorly understood. A component of the Saccharomyces cerevisiae spindle, Ase1, was observed to undergo cell cycle-specific degradation mediated by the cyclosome, or anaphase promoting complex (APC). Ase1 was degraded when cells exited from mitosis and entered G1. Inappropriate expression of stable Ase1 during G1 produced a spindle defect that is sensed by the spindle assembly checkpoint. In addition, loss of ASE1 function destabilized telophase spindles, and expression of a nondegradable Ase1 mutant delayed spindle disassembly. APC-mediated proteolysis therefore appears to regulate both spindle assembly and disassembly.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Juang, Y L -- Huang, J -- Peters, J M -- McLaughlin, M E -- Tai, C Y -- Pellman, D -- New York, N.Y. -- Science. 1997 Feb 28;275(5304):1311-4.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Pediatric Oncology, The Dana-Farber Cancer Institute, Harvard Medical School, Boston, MA 02115, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/9036857" target="_blank"〉PubMed〈/a〉
    Keywords: *Anaphase ; Base Sequence ; Cell Cycle Proteins/*metabolism ; G1 Phase ; Microtubule-Associated Proteins/*metabolism ; Mitosis ; Molecular Sequence Data ; Morphogenesis ; Mutagenesis, Site-Directed ; Saccharomyces cerevisiae/*cytology/metabolism ; Spindle Apparatus/*metabolism/ultrastructure ; Telophase
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  • 35
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    American Association for the Advancement of Science (AAAS)
    Publication Date: 1997-11-14
    Description: The structure of ribosomal RNA (rRNA) in the ribosome was probed with hydroxyl radicals generated locally from iron(II) tethered to the 5' ends of anticodon stem-loop analogs (ASLs) of transfer RNA. The ASLs, ranging in length from 4 to 33 base pairs, bound to the ribosome in a messenger RNA-dependent manner and directed cleavage to specific regions of the 16S, 23S, and 5S rRNA chains. The positions and intensities of cleavage depended on whether the ASLs were bound to the ribosomal A or P site, and on the lengths of their stems. These data predict the three-dimensional locations of the rRNA targets relative to the positions of A- and P- site transfer RNAs inside the ribosome.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Joseph, S -- Weiser, B -- Noller, H F -- GM-17129/GM/NIGMS NIH HHS/ -- New York, N.Y. -- Science. 1997 Nov 7;278(5340):1093-8.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Center for Molecular Biology of RNA, Sinsheimer Laboratories, University of California, Santa Cruz, CA 95064, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/9353184" target="_blank"〉PubMed〈/a〉
    Keywords: Anticodon ; Base Composition ; Base Sequence ; Edetic Acid/analogs & derivatives/metabolism ; Ferrous Compounds/metabolism ; Hydroxyl Radical ; Molecular Sequence Data ; *Nucleic Acid Conformation ; Organometallic Compounds/metabolism ; RNA Probes ; RNA, Ribosomal/*chemistry/metabolism ; RNA, Ribosomal, 16S/chemistry/metabolism ; RNA, Ribosomal, 23S/chemistry/metabolism ; RNA, Ribosomal, 5S/chemistry/metabolism ; RNA, Transfer/chemistry/*metabolism ; RNA, Transfer, Phe/chemistry/metabolism ; Ribosomes/*chemistry/metabolism
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  • 36
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    American Association for the Advancement of Science (AAAS)
    Publication Date: 1997-07-11
    Description: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Kahn, P -- Gibbons, A -- New York, N.Y. -- Science. 1997 Jul 11;277(5323):176-8.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/9235628" target="_blank"〉PubMed〈/a〉
    Keywords: Africa ; Animals ; Base Sequence ; *Biological Evolution ; DNA, Mitochondrial/*genetics/isolation & purification ; Hominidae/*genetics ; Humans ; Mutation ; Polymerase Chain Reaction ; Sequence Analysis, DNA ; Sequence Homology, Nucleic Acid
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  • 37
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    American Association for the Advancement of Science (AAAS)
    Publication Date: 1997-06-13
    Description: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Mindell, D P -- New York, N.Y. -- Science. 1997 Jun 13;276(5319):1629.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/9206819" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Base Sequence ; *Evolution, Molecular ; *Phylogeny
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  • 38
    Publication Date: 1997-03-07
    Description: Telomeres are essential for chromosome stability, but their functions at specific cell-cycle stages are unknown. Telomeres are now shown to have a role in chromosome separation during mitosis. In telomeric DNA mutants of Tetrahymena thermophila, created by expression of a telomerase RNA with an altered template sequence, division of the germline nucleus was severely delayed or blocked in anaphase. The mutant chromatids failed to separate completely at the midzone, becoming stretched to up to twice their normal length. These results suggest a physical block in mutant telomere separation.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Kirk, K E -- Harmon, B P -- Reichardt, I K -- Sedat, J W -- Blackburn, E H -- GM26259/GM/NIGMS NIH HHS/ -- New York, N.Y. -- Science. 1997 Mar 7;275(5305):1478-81.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Microbiology and Immunology, University of California, San Francisco, San Francisco, CA 94143-0414, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/9045613" target="_blank"〉PubMed〈/a〉
    Keywords: *Anaphase ; Animals ; Base Sequence ; Chromatids/physiology ; Chromosomes/*physiology/ultrastructure ; DNA, Protozoan/genetics ; Micronucleus, Germline/ultrastructure ; Microscopy, Fluorescence ; Mitotic Index ; Mutation ; Phenotype ; RNA, Protozoan/genetics ; Repetitive Sequences, Nucleic Acid ; Telomerase/genetics/*metabolism ; Telomere/genetics/*physiology ; Templates, Genetic ; Tetrahymena thermophila/*cytology/genetics ; Transformation, Genetic
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  • 39
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    American Association for the Advancement of Science (AAAS)
    Publication Date: 1997-10-23
    Description: The fate of ventral epidermal cells differs among nematode species. Nonvulval cells fuse with the epidermis in Caenorhabditis elegans, whereas the homologous cells undergo apoptosis in Pristionchus pacificus. The homeotic gene lin-39 is involved in the regulation of these epidermal cell fates. In Caenorhabditis, lin-39 prevents cell fusion of potential vulval cells and specifies the vulva equivalence group. Pristionchus vulvaless mutants that displayed apoptosis of the vulval precursor cells were isolated, and point mutations in lin-39 were identified. Thus, the evolution of these epidermal cell fates is driven by different intrinsic properties of homologous cells.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Eizinger, A -- Sommer, R J -- New York, N.Y. -- Science. 1997 Oct 17;278(5337):452-5.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Max-Planck Institut fur Entwicklungsbiologie, Abteilung Zellbiologie, Spemannstrasse 35, 72076 Tubingen, Germany.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/9334302" target="_blank"〉PubMed〈/a〉
    Keywords: Amino Acid Sequence ; Animals ; Apoptosis ; Base Sequence ; *Biological Evolution ; Caenorhabditis elegans/cytology/genetics/growth & development ; Cell Fusion ; Cell Lineage ; Epidermis/cytology ; Exons ; Female ; *Genes, Helminth ; *Genes, Homeobox ; Molecular Sequence Data ; Mutation ; Phenotype ; Rhabditida/*cytology/*genetics ; Stem Cells/cytology ; Vulva/cytology
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  • 40
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    American Association for the Advancement of Science (AAAS)
    Publication Date: 1997-10-23
    Description: The maximal clique problem has been solved by means of molecular biology techniques. A pool of DNA molecules corresponding to the total ensemble of six-vertex cliques was built, followed by a series of selection processes. The algorithm is highly parallel and has satisfactory fidelity. This work represents further evidence for the ability of DNA computing to solve NP-complete search problems.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Ouyang, Q -- Kaplan, P D -- Liu, S -- Libchaber, A -- New York, N.Y. -- Science. 1997 Oct 17;278(5337):446-9.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉NEC Research Institute, 4 Independence Way, Princeton, NJ 08540, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/9334300" target="_blank"〉PubMed〈/a〉
    Keywords: *Algorithms ; Base Sequence ; *Computing Methodologies ; *DNA/metabolism ; DNA Restriction Enzymes/metabolism ; Escherichia coli/genetics ; Molecular Sequence Data ; Oligodeoxyribonucleotides ; Polymerase Chain Reaction
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  • 41
    Publication Date: 1997-06-13
    Description: Transposable elements of the mariner/Tc1 family are postulated to have spread by horizontal transfer and be relatively independent of host-specific factors. This was tested by introducing the Drosophila mauritiana element mariner into the human parasite Leishmania major, a trypanosomatid protozoan belonging to one of the most ancient eukaryotic lineages. Transposition in Leishmania was efficient, occurring in more than 20 percent of random transfectants, and proceeded by the same mechanism as in Drosophila. Insertional inactivation of a specific gene was obtained, and a modified mariner element was used to select for gene fusions, establishing mariner as a powerful genetic tool for Leishmania and other organisms. These experiments demonstrate the evolutionary range of mariner transposition in vivo and underscore the ability of this ubiquitous DNA to parasitize the eukaryotic genome.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Gueiros-Filho, F J -- Beverley, S M -- AI2964/AI/NIAID NIH HHS/ -- New York, N.Y. -- Science. 1997 Jun 13;276(5319):1716-9.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Biological Chemistry and Molecular Pharmacology, Harvard Medical School, Boston, MA 02115, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/9180085" target="_blank"〉PubMed〈/a〉
    Keywords: Amino Acid Sequence ; Animals ; Base Sequence ; Biological Evolution ; *Cinnamates ; DNA Nucleotidyltransferases/chemistry/*genetics ; *DNA Transposable Elements ; Drosophila/*genetics ; Drug Resistance ; Genes, Protozoan ; Genome, Protozoan ; Hygromycin B/analogs & derivatives/pharmacology ; Leishmania major/drug effects/*genetics ; Mutagenesis, Insertional ; RNA, Messenger/genetics/metabolism ; RNA, Protozoan/genetics/metabolism ; Species Specificity ; Transfection ; Transposases
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    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
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