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  • Molecular Sequence Data  (248)
  • American Association for the Advancement of Science (AAAS)  (248)
  • American Institute of Physics (AIP)
  • Oxford University Press
  • 1995-1999  (248)
  • 1980-1984
  • 1996  (248)
Collection
Publisher
  • American Association for the Advancement of Science (AAAS)  (248)
  • American Institute of Physics (AIP)
  • Oxford University Press
Years
  • 1995-1999  (248)
  • 1980-1984
Year
  • 1
    Publication Date: 1996-07-26
    Description: The SWI/SNF complex participates in the restructuring of chromatin for transcription. The function of the yeast SWI/SNF complex in the remodeling of a nucleosome array has now been analyzed in vitro. Binding of the purified SWI/SNF complex to a nucleosome array disrupted multiple nucleosomes in an adenosine triphosphate-dependent reaction. However, removal of SWI/SNF left a deoxyribonuclease I-hypersensitive site specifically at a nucleosome that was bound by derivatives of the transcription factor Gal4p. Analysis of individual nucleosomes revealed that the SWI/SNF complex catalyzed eviction of histones from the Gal4-bound nucleosomes. Thus, the transient action of the SWI/SNF complex facilitated irreversible disruption of transcription factor-bound nucleosomes.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Owen-Hughes, T -- Utley, R T -- Cote, J -- Peterson, C L -- Workman, J L -- GM47867/GM/NIGMS NIH HHS/ -- R01 GM049650/GM/NIGMS NIH HHS/ -- R37 GM049650/GM/NIGMS NIH HHS/ -- New York, N.Y. -- Science. 1996 Jul 26;273(5274):513-6.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Biochemistry and Molecular Biology and Center for Gene Regulation, Pennsylvania State University, University Park, PA 16802-4500, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/8662543" target="_blank"〉PubMed〈/a〉
    Keywords: Adenosine Triphosphatases ; Adenosine Triphosphate/metabolism ; Base Sequence ; Binding Sites ; DNA, Fungal/metabolism ; DNA-Binding Proteins/*metabolism ; Deoxyribonuclease I/metabolism ; Fungal Proteins/*metabolism ; Histones/metabolism ; Molecular Sequence Data ; *Nuclear Proteins ; Nucleosomes/*metabolism/ultrastructure ; Saccharomyces cerevisiae ; *Saccharomyces cerevisiae Proteins ; Transcription Factors/*metabolism
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  • 2
    Publication Date: 1996-11-29
    Description: A 13.1-kilodalton protein, cysteine-rich neurotrophic factor (CRNF), was purified from the mollusk Lymnaea stagnalis by use of a binding assay on the p75 neurotrophin receptor. CRNF bound to p75 with nanomolar affinity but was not similar in sequence to neurotrophins or any other known gene product. CRNF messenger RNA expression was highest in adult foot subepithelial cells; in the central nervous system, expression was regulated by lesion. The factor evoked neurite outgrowth and modulated calcium currents in pedal motor neurons. Thus, CRNF may be involved in target-derived trophic support for motor neurons and could represent the prototype of another family of p75 ligands.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Fainzilber, M -- Smit, A B -- Syed, N I -- Wildering, W C -- Hermann -- van der Schors, R C -- Jimenez, C -- Li, K W -- van Minnen, J -- Bulloch, A G -- Ibanez, C F -- Geraerts, W P -- New York, N.Y. -- Science. 1996 Nov 29;274(5292):1540-3.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Laboratory of Molecular Neurobiology, Department of Neuroscience, Karolinska Institute, Berzelius Laboratories Building, Doktorsringen 12A, S-17177 Stockholm, Sweden. michael@cajal.mbb.ki.se〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/8929417" target="_blank"〉PubMed〈/a〉
    Keywords: Amino Acid Sequence ; Animals ; Binding, Competitive ; Calcium/metabolism ; Hemolymph/chemistry ; Humans ; Lymnaea/*chemistry ; Molecular Sequence Data ; Motor Neurons/ultrastructure ; Nerve Growth Factors/chemistry/genetics/isolation & ; purification/metabolism/*physiology ; Neurites/physiology ; RNA, Messenger/genetics/metabolism ; Receptor, Nerve Growth Factor ; Receptors, Nerve Growth Factor/*metabolism ; Recombinant Proteins/chemistry/isolation & purification/metabolism ; Tumor Cells, Cultured
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  • 3
    Publication Date: 1996-12-13
    Description: The structure of the Staphylococcus aureus alpha-hemolysin pore has been determined to 1.9 A resolution. Contained within the mushroom-shaped homo-oligomeric heptamer is a solvent-filled channel, 100 A in length, that runs along the sevenfold axis and ranges from 14 A to 46 A in diameter. The lytic, transmembrane domain comprises the lower half of a 14-strand antiparallel beta barrel, to which each protomer contributes two beta strands, each 65 A long. The interior of the beta barrel is primarily hydrophilic, and the exterior has a hydrophobic belt 28 A wide. The structure proves the heptameric subunit stoichiometry of the alpha-hemolysin oligomer, shows that a glycine-rich and solvent-exposed region of a water-soluble protein can self-assemble to form a transmembrane pore of defined structure, and provides insight into the principles of membrane interaction and transport activity of beta barrel pore-forming toxins.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Song, L -- Hobaugh, M R -- Shustak, C -- Cheley, S -- Bayley, H -- Gouaux, J E -- New York, N.Y. -- Science. 1996 Dec 13;274(5294):1859-66.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Biochemistry, University of Chicago, 920 East 58 Street, Chicago, IL 60637, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/8943190" target="_blank"〉PubMed〈/a〉
    Keywords: Amino Acid Sequence ; Bacterial Toxins/*chemistry/metabolism ; Cell Membrane/chemistry/metabolism ; Crystallography, X-Ray ; Hemolysin Proteins/*chemistry/metabolism ; Hydrogen Bonding ; Lipid Bilayers/*chemistry ; Membrane Potentials ; Models, Molecular ; Molecular Sequence Data ; *Protein Conformation ; Protein Folding ; Protein Structure, Secondary ; Staphylococcus aureus/*chemistry
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  • 4
    Publication Date: 1996-07-19
    Description: Signaling molecules are essential for vertebrate embryonic development. Here, two Xenopus homologs of the Drosophila gene fringe, lunatic Fringe (lFng) and radical Fringe (rFng), were identified and the protein product of lFng further characterized. The messenger RNA of lFng is supplied as a maternal message. Its product is a precursor protein consisting of pre-, pro-, and mature regions. The mature lunatic Fringe protein is secreted extracellularly, and it induced mesodermal tissue formation in animal cap assays. These results indicate that secreted lunatic Fringe can induce mesoderm and reveal that the Fringe proteins are a family of vertebrate signaling molecules.〈br /〉〈br /〉〈a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC2080353/" 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/PMC2080353/" target="_blank"〉This paper as free author manuscript - peer-reviewed and accepted for publication〈/a〉〈br /〉〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Wu, J Y -- Wen, L -- Zhang, W J -- Rao, Y -- R01 CA114197/CA/NCI NIH HHS/ -- R01 CA114197-01A2/CA/NCI NIH HHS/ -- R01 EY014576/EY/NEI NIH HHS/ -- R01 EY014576-03/EY/NEI NIH HHS/ -- R01 GM070967/GM/NIGMS NIH HHS/ -- R01 GM070967-02/GM/NIGMS NIH HHS/ -- New York, N.Y. -- Science. 1996 Jul 19;273(5273):355-8.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Pediatrics, Washington University School of Medicine, St. Louis, MO 63110, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/8662522" target="_blank"〉PubMed〈/a〉
    Keywords: Amino Acid Sequence ; Animals ; Base Sequence ; Blastocyst/metabolism ; Cell Line ; Culture Media, Conditioned ; Culture Techniques ; Drosophila Proteins ; Embryo, Nonmammalian/metabolism ; Embryonic Development ; *Embryonic Induction ; *Glycosyltransferases ; Mesoderm/*metabolism ; Molecular Sequence Data ; *N-Acetylglucosaminyltransferases ; Polymerase Chain Reaction ; Protein Processing, Post-Translational ; Proteins/chemistry/genetics/*physiology/secretion ; RNA, Messenger/genetics/metabolism ; *Signal Transduction ; Xenopus/*embryology/genetics ; *Xenopus Proteins
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  • 5
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    American Association for the Advancement of Science (AAAS)
    Publication Date: 1996-12-13
    Description: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Perros, M -- Steitz, T A -- New York, N.Y. -- Science. 1996 Dec 13;274(5294):1929-30; author reply 1931-2.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/8984647" target="_blank"〉PubMed〈/a〉
    Keywords: Base Sequence ; Crystallography, X-Ray ; Cyclic AMP Receptor Protein/*metabolism ; DNA, Bacterial/chemistry/*metabolism ; Escherichia coli/genetics ; *Lac Operon ; Molecular Sequence Data ; *Nucleic Acid Conformation ; Operator Regions, Genetic ; *Promoter Regions, Genetic ; Protein Binding ; Protein Conformation ; Repressor Proteins/chemistry/*metabolism
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  • 6
    Publication Date: 1996-11-15
    Description: The initiation of anaphase and exit from mitosis require the activation of a proteolytic system that ubiquitinates and degrades cyclin B. The regulated component of this system is a large ubiquitin ligase complex, termed the anaphase-promoting complex (APC) or cyclosome. Purified Xenopus laevis APC was found to be composed of eight major subunits, at least four of which became phosphorylated in mitosis. In addition to CDC27, CDC16, and CDC23, APC contained a homolog of Aspergillus nidulans BIME, a protein essential for anaphase. Because mutation of bimE can bypass the interphase arrest induced by either nimA mutation or unreplicated DNA, it appears that ubiquitination catalyzed by APC may also negatively regulate entry into mitosis.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Peters, J M -- King, R W -- Hoog, C -- Kirschner, M W -- New York, N.Y. -- Science. 1996 Nov 15;274(5290):1199-201.〈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/8895470" target="_blank"〉PubMed〈/a〉
    Keywords: Amino Acid Sequence ; *Anaphase ; Animals ; Aspergillus/chemistry/cytology/metabolism ; Cell Cycle Proteins/*chemistry/metabolism ; Cyclins/metabolism ; Electrophoresis, Polyacrylamide Gel ; Fungal Proteins/analysis/*chemistry/genetics/metabolism ; Ligases/*chemistry/metabolism ; *Mitosis ; Molecular Sequence Data ; Mutation ; Ovum ; Phosphorylation ; Ubiquitin-Protein Ligases ; Xenopus laevis
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  • 7
    Publication Date: 1996-05-10
    Description: Transcription factors of the NFAT family are thought to play a major role in regulating the expression of cytokine genes and other inducible genes during the immune response. The role of NFAT1 was investigated by targeted disruption of the NFAT1 gene. Unexpectedly, cells from NFAT1 -/- mice showed increased primary responses to Leishmania major and mounted increased secondary responses to ovalbumin in vitro. In an in vivo model of allergic inflammation, the accumulation of eosinophils and levels of serum immunoglobulin E were increased in NFAT1 -/- mice. These results suggest that NFAT1 exerts a negative regulatory influence on the immune response.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Xanthoudakis, S -- Viola, J P -- Shaw, K T -- Luo, C -- Wallace, J D -- Bozza, P T -- Luk, D C -- Curran, T -- Rao, A -- CA42471/CA/NCI NIH HHS/ -- GM46227/GM/NIGMS NIH HHS/ -- P30 CA21765/CA/NCI NIH HHS/ -- New York, N.Y. -- Science. 1996 May 10;272(5263):892-5.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Neurogenetics Program, Department of CNS Research, Hoffmann-LaRoche, Nutley, NJ 07110, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/8629027" target="_blank"〉PubMed〈/a〉
    Keywords: Amino Acid Sequence ; Animals ; Antigens, Protozoan/immunology ; Cell Line ; Cytokines/biosynthesis ; DNA-Binding Proteins/genetics/*physiology ; Eosinophils/immunology ; Gene Targeting ; Hypersensitivity/*immunology ; *Immunity ; Immunoglobulin E/biosynthesis ; Immunologic Memory ; Leishmania major/immunology ; *Lymphocyte Activation ; Mice ; Molecular Sequence Data ; NFATC Transcription Factors ; *Nuclear Proteins ; Ovalbumin/immunology ; T-Lymphocytes/immunology ; Transcription Factors/genetics/*physiology
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  • 8
    Publication Date: 1996-03-08
    Description: Friedreich's ataxia (FRDA) is an autosomal recessive, degenerative disease that involves the central and peripheral nervous systems and the heart. A gene, X25, was identified in the critical region for the FRDA locus on chromosome 9q13. This gene encodes a 210-amino acid protein, frataxin, that has homologs in distant species such as Caenorhabditis elegans and yeast. A few FRDA patients were found to have point mutations in X25, but the majority were homozygous for an unstable GAA trinucleotide expansion in the first X25 intron.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Campuzano, V -- Montermini, L -- Molto, M D -- Pianese, L -- Cossee, M -- Cavalcanti, F -- Monros, E -- Rodius, F -- Duclos, F -- Monticelli, A -- Zara, F -- Canizares, J -- Koutnikova, H -- Bidichandani, S I -- Gellera, C -- Brice, A -- Trouillas, P -- De Michele, G -- Filla, A -- De Frutos, R -- Palau, F -- Patel, P I -- Di Donato, S -- Mandel, J L -- Cocozza, S -- Koenig, M -- Pandolfo, M -- 722/Telethon/Italy -- NS34192/NS/NINDS NIH HHS/ -- New York, N.Y. -- Science. 1996 Mar 8;271(5254):1423-7.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department de Genetica, University of Valencia, Spain.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/8596916" target="_blank"〉PubMed〈/a〉
    Keywords: Alleles ; Amino Acid Sequence ; Base Sequence ; Chromosomes, Human, Pair 9/*genetics ; DNA Primers ; Female ; Friedreich Ataxia/*genetics ; Genes, Recessive ; Heterozygote ; Humans ; *Introns ; *Iron-Binding Proteins ; Male ; Molecular Sequence Data ; Pedigree ; Point Mutation ; Polymerase Chain Reaction ; Proteins/chemistry/*genetics ; Sequence Alignment ; *Trinucleotide Repeats
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  • 9
    Publication Date: 1996-03-01
    Description: HLA-DM (DM) facilitates peptide loading of major histocompatibility complex class II molecules in human cell lines. Mice lacking functional H2-M, the mouse equivalent of DM, have normal amounts of class II molecules at the cell surface, but most of these are associated with invariant chain-derived CLIP peptides. These mice contain large numbers of CD4+ T cells, which is indicative of positive selection in the thymus. Their CD4+ cells were unresponsive to self H2-M-deficient antigen-presenting cells (APCs) but were hyperreactive to wild-type APCs. H2-M-deficient APCs failed to elicit proliferative responses from wild-type T cells.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Fung-Leung, W P -- Surh, C D -- Liljedahl, M -- Pang, J -- Leturcq, D -- Peterson, P A -- Webb, S R -- Karlsson, L -- New York, N.Y. -- Science. 1996 Mar 1;271(5253):1278-81.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉R. W. Johnson Pharmaceutical Research Institute, San Diego, CA 92121, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/8638109" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; *Antigen Presentation ; Antigen-Presenting Cells/*immunology ; Antigens, Differentiation, B-Lymphocyte/immunology/metabolism ; Base Sequence ; CD4-Positive T-Lymphocytes/*immunology ; Cells, Cultured ; Gene Targeting ; Histocompatibility Antigens Class II/genetics/*immunology/metabolism ; Isoantigens/immunology ; Lymphocyte Activation ; Mice ; Molecular Sequence Data ; Mutation
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  • 10
    Publication Date: 1996-08-16
    Description: A signaling pathway has been elucidated whereby growth factors activate the transcription factor cyclic adenosine monophosphate response element-binding protein (CREB), a critical regulator of immediate early gene transcription. Growth factor-stimulated CREB phosphorylation at serine-133 is mediated by the RAS-mitogen-activated protein kinase (MAPK) pathway. MAPK activates CREB kinase, which in turn phosphorylates and activates CREB. Purification, sequencing, and biochemical characterization of CREB kinase revealed that it is identical to a member of the pp90(RSK) family, RSK2. RSK2 was shown to mediate growth factor induction of CREB serine-133 phosphorylation both in vitro and in vivo. These findings identify a cellular function for RSK2 and define a mechanism whereby growth factor signals mediated by RAS and MAPK are transmitted to the nucleus to activate gene expression.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Xing, J -- Ginty, D D -- Greenberg, M E -- CA43855/CA/NCI NIH HHS/ -- NS34814-01/NS/NINDS NIH HHS/ -- P30-HD18655/HD/NICHD NIH HHS/ -- New York, N.Y. -- Science. 1996 Aug 16;273(5277):959-63.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Program in Biological and Biomedical Sciences, Harvard Medical School, Boston, MA 02115, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/8688081" target="_blank"〉PubMed〈/a〉
    Keywords: Amino Acid Sequence ; Animals ; Calcium-Calmodulin-Dependent Protein Kinases/*metabolism ; Cell Line ; Cell Nucleus/metabolism ; Cyclic AMP Response Element-Binding Protein/*metabolism ; Epidermal Growth Factor/pharmacology ; *Gene Expression Regulation ; Growth Substances/*pharmacology ; Humans ; Molecular Sequence Data ; Nerve Growth Factors/pharmacology ; PC12 Cells ; Phosphorylation ; Protein-Serine-Threonine Kinases/*metabolism ; Rats ; Ribosomal Protein S6 Kinases ; *Signal Transduction ; Tetradecanoylphorbol Acetate/pharmacology ; Transcriptional Activation ; Transfection ; Tumor Cells, Cultured ; ras Proteins/metabolism
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  • 11
    Publication Date: 1996-08-09
    Description: STAT proteins (signal transducers and activators of transcription) activate distinct target genes despite having similar DNA binding preferences. The transcriptional specificity of STAT proteins was investigated on natural STAT binding sites near the interferon-gamma gene. These sites are arranged in multiple copies and required cooperative interactions for STAT binding. The conserved amino-terminal domain of STAT proteins was required for cooperative DNA binding, although this domain was not essential for dimerization or binding to a single site. Cooperative binding interactions enabled the STAT proteins to recognize variations of the consensus site. These sites can be specific for the different STAT proteins and may function to direct selective transcriptional activation.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Xu, X -- Sun, Y L -- Hoey, T -- New York, N.Y. -- Science. 1996 Aug 9;273(5276):794-7.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Tularik, Two Corporate Drive, South San Francisco, CA 94080, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/8670419" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Base Sequence ; Binding Sites ; Cell Line ; DNA/*metabolism ; DNA-Binding Proteins/chemistry/immunology/*metabolism ; Interferon-gamma/genetics ; Introns ; Molecular Sequence Data ; Mutation ; Oligodeoxyribonucleotides/metabolism ; Promoter Regions, Genetic ; STAT1 Transcription Factor ; STAT4 Transcription Factor ; Sequence Deletion ; Signal Transduction ; Trans-Activators/chemistry/immunology/*metabolism ; *Transcriptional Activation
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  • 12
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    American Association for the Advancement of Science (AAAS)
    Publication Date: 1996-02-23
    Description: The pleiotropic biological activities of interleukin-1 (IL-1) are mediated by its type I receptor (IL-1RI). When the ligand binds, IL-1RI initiates a signaling cascade that results in the activation of the transcription regulator nuclear factor kappa B (NF-kappa B). A protein kinase designated IRAK (IL-1 receptor-associated kinase) was purified, and its complementary DNA was molecularly cloned. When human embryonic kidney cells (cell line 293) over-expressing IL-1RI or HeLa cells were exposed to IL-1, IRAK rapidly associated with the IL-1RI complex and was phosphorylated. The primary amino acid sequence of IRAK shares similarity with that of Pelle, a protein kinase that is essential for the activation of a NF-kappa B homolog in Drosophila.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Cao, Z -- Henzel, W J -- Gao, X -- New York, N.Y. -- Science. 1996 Feb 23;271(5252):1128-31.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Molecular Biology Department, Tularik, Incorporated, South San Francisco, CA 94080, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/8599092" target="_blank"〉PubMed〈/a〉
    Keywords: Amino Acid Sequence ; Animals ; Cell Line ; Cloning, Molecular ; DNA, Complementary/genetics ; Drosophila ; *Drosophila Proteins ; HeLa Cells ; Humans ; Interleukin-1/*metabolism/pharmacology ; Interleukin-1 Receptor-Associated Kinases ; Molecular Sequence Data ; Phosphorylation ; Protein Kinases/chemistry/genetics/isolation & purification/*metabolism ; Protein-Serine-Threonine Kinases/chemistry ; Receptors, Interleukin-1/*metabolism ; Transfection
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  • 13
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    American Association for the Advancement of Science (AAAS)
    Publication Date: 1996-10-18
    Description: In mice, susceptibility to Leishmania major is associated with the early expansion of T helper 2 cells (TH2) cells, but nothing is known of the specificity of these cells. A previously identified antigen, Leishmania homolog of receptors for activated C kinase (LACK), was found to be the focus of this initial response. Mice made tolerant to LACK by the transgenic expression of the antigen in the thymus exhibited both a diminished TH2 response and a healing phenotype. Thus, T cells that are activated early and are reactive to a single antigen play a pivotal role in directing the immune response to the entire parasite.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Julia, V -- Rassoulzadegan, M -- Glaichenhaus, N -- New York, N.Y. -- Science. 1996 Oct 18;274(5286):421-3.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉CNRS, Institut de Pharmacologie Moleculaire et Cellulaire, 660 Route des Lucioles, 06560 Valbonne, France.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/8832890" target="_blank"〉PubMed〈/a〉
    Keywords: Amino Acid Sequence ; Animals ; Antigens, Protozoan/*immunology ; Crosses, Genetic ; Female ; Immune Tolerance ; Immunity, Innate ; Immunization ; Interleukin-4/secretion ; Interleukin-5/secretion ; Leishmania major/*immunology ; Leishmaniasis, Cutaneous/*immunology ; Lymphocyte Activation ; Male ; Mice ; Mice, Inbred BALB C ; Mice, Transgenic ; Molecular Sequence Data ; Phenotype ; Protozoan Proteins/*immunology ; Th1 Cells/immunology ; Th2 Cells/*immunology
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  • 14
    Publication Date: 1996-01-12
    Description: The structural features of the G.U wobble pair in Escherichia coli alanine transfer RNA (tRNA(Ala)) that are associated with aminoacylation by alanyl-tRNA synthetase (AlaRS) were investigated in vivo for wild-type tRNA(Ala) and mutant tRNAs with G.U substitutions. tRNA(Ala) with G.U, C.A, or G.A gave similar amounts of charged tRNA(Ala) and supported viability of E. coli lacking chromosomal tRNA(Ala) genes. tRNA(Ala) with G.C was inactive. Recognition of G.U by AlaRS thus requires more than the functional groups on G.U in a regular helix and may involve detection of a helical distortion.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Gabriel, K -- Schneider, J -- McClain, W H -- GM42123/GM/NIGMS NIH HHS/ -- New York, N.Y. -- Science. 1996 Jan 12;271(5246):195-7.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Bacteriology, University of Wisconsin, Madison 53706, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/8539617" target="_blank"〉PubMed〈/a〉
    Keywords: Alanine-tRNA Ligase/*metabolism ; Anticodon ; Base Composition ; Base Sequence ; Escherichia coli/genetics/growth & development ; Genes, Bacterial ; Guanine/chemistry ; Molecular Sequence Data ; Mutation ; Nucleic Acid Conformation ; Plasmids ; RNA, Transfer, Ala/chemistry/genetics/*metabolism ; Uracil/chemistry
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  • 15
    Publication Date: 1996-05-31
    Description: Missense mutations in the 695-amino acid form of the amyloid precursor protein (APP695) cosegregate with disease phenotype in families with dominantly inherited Alzheimer's disease. These mutations convert valine at position 642 to isoleucine, phenylalanine, or glycine. Expression of these mutant proteins, but not of normal APP695, was shown to induce nucleosomal DNA fragmentation in neuronal cells. Induction of DNA fragmentation required the cytoplasmic domain of the mutants and appeared to be mediated by heterotrimeric guanosine triphosphate-binding proteins (G proteins).〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Yamatsuji, T -- Matsui, T -- Okamoto, T -- Komatsuzaki, K -- Takeda, S -- Fukumoto, H -- Iwatsubo, T -- Suzuki, N -- Asami-Odaka, A -- Ireland, S -- Kinane, T B -- Giambarella, U -- Nishimoto, I -- New York, N.Y. -- Science. 1996 May 31;272(5266):1349-52.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Cardiovascular Research Center, Massachusetts General Hospital, Department of Medicine, Harvard Medical School, Charlestown, MA 02129, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/8650548" target="_blank"〉PubMed〈/a〉
    Keywords: Alzheimer Disease/*genetics/metabolism ; Amyloid beta-Peptides/metabolism ; Amyloid beta-Protein Precursor/chemistry/genetics/*physiology ; Animals ; Apoptosis ; Base Sequence ; Culture Media, Conditioned ; DNA/*metabolism ; GTP-Binding Proteins/*physiology ; Humans ; Hybrid Cells ; Mice ; Molecular Sequence Data ; Mutagenesis, Site-Directed ; Mutation ; Neurons/cytology/*metabolism ; Nucleosomes/*metabolism ; Peptide Fragments/metabolism ; Rats ; Transfection
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  • 16
    Publication Date: 1996-06-28
    Description: Nucleic acid bulges have been implicated in a number of biological processes and are specific cleavage targets for the enediyne antitumor antibiotic neocarzinostatin chromophore in a base-catalyzed, radical-mediated reaction. The solution structure of the complex between an analog of the bulge-specific cleaving species and an oligodeoxynucleotide containing a two-base bulge was elucidated by nuclear magnetic resonance. An unusual binding mode involves major groove recognition by the drug carbohydrate unit and tight fitting of the wedge-shaped drug in the triangular prism pocket formed by the two looped-out bulge bases and the neighboring base pairs. The two drug rings mimic helical DNA bases, complementing the bent DNA structure. The putative abstracting drug radical is 2.2 +/- 0.1 angstroms from the pro-S H5' of the target bulge nucleotide. This structure clarifies the mechanism of bulge recognition and cleavage by a drug and provides insight into the design of bulge-specific nucleic acid binding molecules.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Stassinopoulos, A -- Ji, J -- Gao, X -- Goldberg, I H -- CA44257/CA/NCI NIH HHS/ -- GM53793/GM/NIGMS NIH HHS/ -- New York, N.Y. -- Science. 1996 Jun 28;272(5270):1943-6.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Biological Chemistry and Molecular Pharmacology, Harvard Medical School, Boston, Massachusetts 02115, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/8658168" target="_blank"〉PubMed〈/a〉
    Keywords: Base Composition ; Base Sequence ; DNA/chemistry/*metabolism ; Enediynes ; Magnetic Resonance Spectroscopy ; Models, Molecular ; Molecular Sequence Data ; *Nucleic Acid Conformation ; Oligodeoxyribonucleotides/chemistry/*metabolism ; Zinostatin/analogs & derivatives/chemistry/metabolism
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  • 17
    Publication Date: 1996-08-30
    Description: In the mitochondria of trypanosomatid protozoa the precursors of messenger RNAs (pre-mRNAs) have their coding information remodeled by the site-specific insertion and deletion of uridylate (U) residues. Small trans-acting guide RNAs (gRNAs) supply the genetic information for this RNA editing. An in vitro system was developed to study the mechanism of U insertion into pre-mRNA. U-insertion editing occurs through a series of enzymatic steps that begin with gRNA-directed pre-mRNA cleavage. Inserted U's are derived from free uridine triphosphate and are added to the 3' terminus of a 5' pre-mRNA cleavage product. gRNA specifies edited RNA sequence at the subsequent ligation step by base pairing-mediated juxtaposition of the 3' cleavage product and the processed 5' cleavage product. gRNA/pre-mRNA chimeras, purported intermediates, seem to be abortive end products of the same reaction.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Kable, M L -- Seiwert, S D -- Heidmann, S -- Stuart, K -- GM08347/GM/NIGMS NIH HHS/ -- GM42188/GM/NIGMS NIH HHS/ -- New York, N.Y. -- Science. 1996 Aug 30;273(5279):1189-95.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Seattle Biomedical Research Institute, Seattle, WA 98109, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/8703045" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Base Sequence ; Crithidia fasciculata/genetics/metabolism ; Mitochondria/genetics/metabolism ; Models, Genetic ; Molecular Sequence Data ; RNA/metabolism ; *RNA Editing ; RNA Precursors/*metabolism ; RNA, Guide/*metabolism ; RNA, Messenger/*metabolism ; RNA, Protozoan/metabolism ; Trypanosoma brucei brucei/genetics/metabolism ; Trypanosomatina/*genetics/metabolism ; Uridine Monophosphate/*metabolism ; Uridine Triphosphate/metabolism
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  • 18
    Publication Date: 1996-06-21
    Description: ZPR1 is a zinc finger protein that binds to the cytoplasmic tyrosine kinase domain of the epidermal growth factor receptor (EGFR). Deletion analysis demonstrated that this binding interaction is mediated by the zinc fingers of ZPR1 and subdomains X and XI of the EGFR tyrosine kinase. Treatment of mammalian cells with EGF caused decreased binding of ZPR1 to the EGFR and the accumulation of ZPR1 in the nucleus. The effect of EGF to regulate ZPR1 binding is dependent on tyrosine phosphorylation of the EGFR. ZPR1 therefore represents a prototype for a class of molecule that binds to the EGFR and is released from the receptor after activation.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Galcheva-Gargova, Z -- Konstantinov, K N -- Wu, I H -- Klier, F G -- Barrett, T -- Davis, R J -- R01-CA58396/CA/NCI NIH HHS/ -- New York, N.Y. -- Science. 1996 Jun 21;272(5269):1797-802.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Biochemistry and Molecular Biology, University of Massachusetts Medical School, Worcester, 01605, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/8650580" target="_blank"〉PubMed〈/a〉
    Keywords: Amino Acid Sequence ; Animals ; Carrier Proteins/chemistry/*metabolism/secretion ; Cell Line ; Cell Nucleus/metabolism ; Cloning, Molecular ; Cytoplasm/metabolism ; Epidermal Growth Factor/pharmacology ; Humans ; Immunoblotting ; Male ; Mice ; Molecular Sequence Data ; Phosphorylation ; Phosphotyrosine/metabolism ; Protein Structure, Secondary ; RNA, Messenger/genetics/metabolism ; Receptor, Epidermal Growth Factor/chemistry/*metabolism ; Testis/metabolism ; Type C Phospholipases/metabolism ; Vanadates/pharmacology ; *Zinc Fingers ; src Homology Domains
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  • 19
    Publication Date: 1996-05-31
    Description: Unesterified sterol modulates the function of eukaryotic membranes. In human cells, sterol is esterified to a storage form by acyl-coenzyme A (CoA): cholesterol acyl transferase (ACAT). Here, two genes are identified, ARE1 and ARE2, that encode ACAT-related enzymes in yeast. The yeast enzymes are 49 percent identical to each other and exhibit 23 percent identity to human ACAT. Deletion of ARE2 reduced sterol ester levels to approximately 25 percent of normal levels, whereas disruption of ARE1 did not affect sterol ester biosynthesis. Deletion of both genes resulted in a viable cell with undetectable esterified sterol. Measurements of [14C]acetate incorporation into saponified lipids indicated down-regulation of sterol biosynthesis in the are1 are2 mutant cells. With the use of a consensus sequence to the yeast and human genes, an additional number of the ACAT gene family was identified in humans.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Yang, H -- Bard, M -- Bruner, D A -- Gleeson, A -- Deckelbaum, R J -- Aljinovic, G -- Pohl, T M -- Rothstein, R -- Sturley, S L -- GM 50237/GM/NIGMS NIH HHS/ -- HG00861/HG/NHGRI NIH HHS/ -- R01 AI38598/AI/NIAID NIH HHS/ -- New York, N.Y. -- Science. 1996 May 31;272(5266):1353-6.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Institute of Human Nutrition, Columbia University College of Physicians and Surgeons, New York, 10032, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/8650549" target="_blank"〉PubMed〈/a〉
    Keywords: Acetates/metabolism ; Acyltransferases/chemistry/*genetics/metabolism ; Amino Acid Sequence ; Base Sequence ; Cell Membrane/metabolism ; Cholesterol Esters/metabolism ; Cyclin-Dependent Kinase 8 ; *Cyclin-Dependent Kinases ; DNA, Complementary/genetics ; Ergosterol/metabolism ; Esterification ; *Genes, Fungal ; Homeostasis ; Humans ; Molecular Sequence Data ; Mutation ; Oleic Acid ; Oleic Acids/metabolism ; Saccharomyces cerevisiae/*genetics/metabolism ; Saccharomyces cerevisiae Proteins ; Sterol O-Acyltransferase/*genetics/metabolism ; Sterols/*metabolism ; Transformation, Genetic
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  • 20
    Publication Date: 1996-03-15
    Description: Iron must cross biological membranes to reach essential intracellular enzymes. Two proteins in the plasma membrane of yeast--a multicopper oxidase, encoded by the FET3 gene, and a permease, encoded by the FTR1 gene--were shown to mediate high-affinity iron uptake. FET3 expression was required for FTR1 protein to be transported to the plasma membrane. FTR1 expression was required for apo-FET3 protein to be loaded with copper and thus acquire oxidase activity. FTR1 protein also played a direct role in iron transport. Mutations in a conserved sequence motif of FTR1 specifically blocked iron transport.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Stearman, R -- Yuan, D S -- Yamaguchi-Iwai, Y -- Klausner, R D -- Dancis, A -- New York, N.Y. -- Science. 1996 Mar 15;271(5255):1552-7.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Cell Biology and Metabolism Branch, National Institutes of Child Health and Human Development, National Institutes of Health, Bethesda, MD 20892, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/8599111" target="_blank"〉PubMed〈/a〉
    Keywords: Amino Acid Sequence ; Binding Sites ; Biological Transport ; Carrier Proteins/chemistry/*genetics/*metabolism ; Cell Membrane/metabolism ; *Ceruloplasmin ; Copper/metabolism/pharmacology ; Endoplasmic Reticulum/metabolism ; Ferric Compounds/metabolism ; Ferritins/chemistry/metabolism ; Ferrous Compounds/metabolism ; Genes, Fungal ; Golgi Apparatus/metabolism ; Iron/*metabolism ; Membrane Transport Proteins/chemistry/*genetics/*metabolism ; Models, Biological ; Molecular Sequence Data ; Multienzyme Complexes/*metabolism ; Mutation ; Open Reading Frames ; Oxidation-Reduction ; Oxidoreductases/*metabolism ; Saccharomyces cerevisiae/genetics/*metabolism ; *Saccharomyces cerevisiae Proteins ; Transformation, Genetic
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  • 21
    Publication Date: 1996-08-30
    Description: 17beta-Estradiol modulates gene transcription through the estrogen receptor and the estrogen response element in DNA. The human transforming growth factor-beta3 gene was shown to be activated by the estrogen receptor in the presence of estrogen metabolites or estrogen antagonists. Activation was mediated by a polypurine sequence, termed the raloxifene response element, and did not require the DNA binding domain of the estrogen receptor. Interaction of the estrogen receptor with the raloxifene response element appears to require a cellular adapter protein. The observation that individual estrogens modulate multiple DNA response elements may explain the tissue-selective estrogen agonist or antagonist activity of compounds such as raloxifene.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Yang, N N -- Venugopalan, M -- Hardikar, S -- Glasebrook, A -- New York, N.Y. -- Science. 1996 Aug 30;273(5279):1222-5.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Endocrine Research, Lilly Research Labs, Eli Lilly and Co., Indianapolis, IN 46285, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/8703055" target="_blank"〉PubMed〈/a〉
    Keywords: Base Sequence ; Estradiol/metabolism/pharmacology ; Estrogen Antagonists/*pharmacology ; *Gene Expression Regulation ; Genes, Reporter ; Humans ; Ligands ; Molecular Sequence Data ; Piperidines/*pharmacology ; *Promoter Regions, Genetic ; Raloxifene Hydrochloride ; Receptors, Estrogen/*metabolism ; Transfection ; Transforming Growth Factor beta/*genetics ; Tumor Cells, Cultured
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  • 22
    Publication Date: 1996-05-31
    Description: In a previous study, an RNA aptamer for the specific recognition of arginine was evolved from a parent sequence that bound citrulline specifically. The two RNAs differ at only 3 positions out of 44. The solution structures of the two aptamers complexed to their cognate amino acids have now been determined by two-dimensional nuclear magnetic resonance spectroscopy. Both aptamers contain two asymmetrical internal loops that are not well ordered in the free RNA but that fold into a compact structure upon ligand binding. Those nucleotides common to both RNAs include a conserved cluster of purine residues, three of which form an uneven plane containing a G:G pair, and two other residues nearly perpendicular to that surface. Two of the three variant nucleotides are stacked on the cluster of purines and form a triple contact to the amino acid side chain, whereas the edge of the third variant nucleotide is capping the binding pocket.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Yang, Y -- Kochoyan, M -- Burgstaller, P -- Westhof, E -- Famulok, M -- New York, N.Y. -- Science. 1996 May 31;272(5266):1343-7.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Centre de Biochimie Structurale (CBS), Unite Mixte de Recherche, CNRS 9955, Montpellier, France.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/8650546" target="_blank"〉PubMed〈/a〉
    Keywords: Arginine/chemistry/*metabolism ; Base Composition ; Base Sequence ; Citrulline/chemistry/*metabolism ; Crystallography, X-Ray ; Hydrogen Bonding ; Ligands ; Magnetic Resonance Spectroscopy ; Models, Molecular ; Molecular Sequence Data ; Mutation ; *Nucleic Acid Conformation ; RNA/*chemistry/genetics/*metabolism
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  • 23
    facet.materialart.
    Unknown
    American Association for the Advancement of Science (AAAS)
    Publication Date: 1996-11-29
    Description: The proteins encoded by the myc proto-oncogene family are involved in cell proliferation, apoptosis, differentiation, and neoplasia. Myc acts through dimerization with Max to bind DNA and activate transcription. Homologs of the myc and max genes were cloned from the fruit fly Drosophila melanogaster and their protein products (dMyc and dMax) were shown to heterodimerize, recognize the same DNA sequence as their vertebrate homologs, and activate transcription. The dMyc protein is likely encoded by the Drosophila gene diminutive (dm), a mutation in which results in small body size and female sterility caused by degeneration of the ovaries. These findings indicate a potential role for Myc in germ cell development and set the stage for genetic analysis of Myc and Max.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Gallant, P -- Shiio, Y -- Cheng, P F -- Parkhurst, S M -- Eisenman, R N -- R01CA47138/CA/NCI NIH HHS/ -- R01GM47852/GM/NIGMS NIH HHS/ -- New York, N.Y. -- Science. 1996 Nov 29;274(5292):1523-7.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Division of Basic Sciences, Fred Hutchinson Cancer Research Center, 1124 Columbia Street, Seattle WA 98104, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/8929412" target="_blank"〉PubMed〈/a〉
    Keywords: Amino Acid Sequence ; Animals ; Basic Helix-Loop-Helix Leucine Zipper Transcription Factors ; Basic-Leucine Zipper Transcription Factors ; Cloning, Molecular ; DNA Transposable Elements ; DNA, Complementary ; DNA-Binding Proteins/chemistry/genetics/metabolism ; Dimerization ; *Drosophila Proteins ; Drosophila melanogaster/chemistry/*genetics/growth & development/metabolism ; Female ; Gene Expression Regulation, Developmental ; Genes, Insect ; Genes, myc ; *Helix-Loop-Helix Motifs ; Humans ; Molecular Sequence Data ; Oligonucleotide Probes/metabolism ; Ovary/metabolism ; Proto-Oncogene Proteins c-myc/chemistry/genetics/metabolism ; RNA, Messenger/genetics/metabolism ; Transcription Factors/chemistry/genetics/*metabolism ; Transcription, Genetic
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  • 24
    Publication Date: 1996-04-26
    Description: Nerve growth factor (NGF), brain-derived neurotrophic factor (BDNF), and neurotrophin-3 (NT-3) selectively bind to distinct members of the Trk family of tyrosine kinase receptors, but all three bind with similar affinities to the neurotrophin receptor p75 (p75NTR). The biological significance of neurotrophin binding to p75NTR in cells that also express Trk receptors has been difficult to ascertain. In the absence of TrkA, NGF binding to p75NGR activated the transcription factor nuclear factor kappa B (NF-kappa B) in rat Schwann cells. This activation was not observed in Schwann cells isolated from mice that lacked p75NTR. The effect was selective for NGF; NF-kappa B was not activated by BDNF or NT-3.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Carter, B D -- Kaltschmidt, C -- Kaltschmidt, B -- Offenhauser, N -- Bohm-Matthaei, R -- Baeuerle, P A -- Barde, Y A -- New York, N.Y. -- Science. 1996 Apr 26;272(5261):542-5.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Neurobiochemistry, Max-Planck Institute for Psychiatry, Martinsried, Germany.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/8614802" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Base Sequence ; Brain-Derived Neurotrophic Factor ; Cell Nucleus/metabolism ; Cells, Cultured ; DNA/metabolism ; L Cells (Cell Line) ; Mice ; Molecular Sequence Data ; NF-kappa B/*metabolism ; Nerve Growth Factors/*metabolism/pharmacology ; Nerve Tissue Proteins/metabolism/pharmacology ; Neurotrophin 3 ; Proto-Oncogene Proteins/metabolism ; Rats ; Receptor Protein-Tyrosine Kinases/metabolism ; Receptor, Nerve Growth Factor ; Receptor, trkA ; Receptors, Nerve Growth Factor/*metabolism ; Schwann Cells/*metabolism ; Signal Transduction/*physiology
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  • 25
    Publication Date: 1996-09-20
    Description: Group I self-splicing introns catalyze their own excision from precursor RNAs by way of a two-step transesterification reaction. The catalytic core of these ribozymes is formed by two structural domains. The 2.8-angstrom crystal structure of one of these, the P4-P6 domain of the Tetrahymena thermophila intron, is described. In the 160-nucleotide domain, a sharp bend allows stacked helices of the conserved core to pack alongside helices of an adjacent region. Two specific long-range interactions clamp the two halves of the domain together: a two-Mg2+-coordinated adenosine-rich corkscrew plugs into the minor groove of a helix, and a GAAA hairpin loop binds to a conserved 11-nucleotide internal loop. Metal- and ribose-mediated backbone contacts further stabilize the close side-by-side helical packing. The structure indicates the extent of RNA packing required for the function of large ribozymes, the spliceosome, and the ribosome.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Cate, J H -- Gooding, A R -- Podell, E -- Zhou, K -- Golden, B L -- Kundrot, C E -- Cech, T R -- Doudna, J A -- 5T32GM08283-07/GM/NIGMS NIH HHS/ -- GM22778-21/GM/NIGMS NIH HHS/ -- New York, N.Y. -- Science. 1996 Sep 20;273(5282):1678-85.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Molecular Biophysics and Biochemistry, Yale University, New Haven, CT 06520, USA. doudna@csb.yale.edu〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/8781224" target="_blank"〉PubMed〈/a〉
    Keywords: Adenine/chemistry ; Animals ; Base Composition ; Base Sequence ; Binding Sites ; Catalysis ; Crystallography, X-Ray ; Hydrogen Bonding ; *Introns ; Magnesium/chemistry ; Models, Molecular ; Molecular Sequence Data ; *Nucleic Acid Conformation ; Phosphates/chemistry ; Phylogeny ; RNA Splicing ; RNA, Catalytic/*chemistry/metabolism ; RNA, Protozoan/*chemistry/metabolism ; Ribose/chemistry ; Tetrahymena thermophila/genetics
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  • 26
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    Unknown
    American Association for the Advancement of Science (AAAS)
    Publication Date: 1996-05-31
    Description: For unknown reasons, the eukaryotic transcription factor TFIID inefficiently recognizes promoters. Human TFIID was found to form highly specific homodimers that must dissociate before DNA binding. TFIID dimers formed through self-association of the TATA-binding polypeptide (TBP) subunit and could be immunoprecipitated with antibodies to TAF(II)250, the core subunit of TFIID. Chemical cross-linking experiments in HeLa cells revealed the presence of TBP dimers in vivo. These findings suggest that dimerization through TBP is the physiological state of TFIID when not bound to DNA. Thus, the inefficiency of TFIID binding to a promoter may be partly attributable to the competitive effect of dimerization.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Taggart, A K -- Pugh, B F -- GM47855/GM/NIGMS NIH HHS/ -- New York, N.Y. -- Science. 1996 May 31;272(5266):1331-3.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Center for Gene Regulation, Department of Biochemistry and Molecular Biology, Pennsylvania State University, University Park, PA 16802, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/8650542" target="_blank"〉PubMed〈/a〉
    Keywords: Base Sequence ; Biopolymers ; Chromatography, Gel ; DNA/metabolism ; DNA-Binding Proteins/chemistry/metabolism ; HeLa Cells ; Histone Acetyltransferases ; Humans ; Immunoblotting ; Models, Chemical ; Molecular Sequence Data ; Nuclear Proteins/chemistry/metabolism ; Recombinant Proteins/chemistry/metabolism ; TATA Box ; *TATA-Binding Protein Associated Factors ; TATA-Box Binding Protein ; Transcription Factor TFIID ; Transcription Factors/*chemistry/metabolism
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  • 27
    Publication Date: 1996-07-12
    Description: The three-dimensional structure of the amino-terminal core domain (residues 1 through 151) of the human immunodeficiency virus-type 1 (HIV-1) capsid protein has been solved by multidimensional heteronuclear magnetic resonance spectroscopy. The structure is unlike those of previously characterized viral coat proteins and is composed of seven alpha helices, two beta hairpins, and an exposed partially ordered loop. The domain is shaped like an arrowhead, with the beta hairpins and loop exposed at the trailing edge and the carboxyl-terminal helix projecting from the tip. The proline residue Pro1 forms a salt bridge with a conserved, buried aspartate residue (Asp51), which suggests that the amino terminus of the protein rearranges upon proteolytic maturation. The binding site for cyclophilin A, a cellular rotamase that is packaged into the HIV-1 virion, is located on the exposed loop and encompasses the essential proline residue Pro90. In the free monomeric domain, Pro90 adopts kinetically trapped cis and trans conformations, raising the possibility that cyclophilin A catalyzes interconversion of the cis- and trans-Pro90 loop structures.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Gitti, R K -- Lee, B M -- Walker, J -- Summers, M F -- Yoo, S -- Sundquist, W I -- AI30917/AI/NIAID NIH HHS/ -- CA 42014/CA/NCI NIH HHS/ -- GM 42561/GM/NIGMS NIH HHS/ -- New York, N.Y. -- Science. 1996 Jul 12;273(5272):231-5.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Howard Hughes Medical Institute and Department of Chemistry and Biochemistry, University of Maryland Baltimore County, Baltimore, MD 21228, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/8662505" target="_blank"〉PubMed〈/a〉
    Keywords: Amino Acid Isomerases/metabolism ; Amino Acid Sequence ; Aspartic Acid/chemistry ; Binding Sites ; Capsid/*chemistry/metabolism ; Carrier Proteins/metabolism ; HIV Core Protein p24/*chemistry/metabolism ; HIV-1/*chemistry ; Magnetic Resonance Spectroscopy ; Models, Molecular ; Molecular Sequence Data ; Peptidylprolyl Isomerase ; Proline/chemistry ; Protein Conformation ; Protein Processing, Post-Translational ; Protein Structure, Secondary ; Protein Structure, Tertiary ; Virion/chemistry
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  • 28
    Publication Date: 1996-05-10
    Description: Cells deprived of serum mitogens will either undergo immediate cell cycle arrest or complete mitosis and arrest in the next cell cycle. The transition from mitogen dependence to mitogen independence occurs in the mid-to late G1 phase of the cell cycle and is called the restriction point. Murine Balb/c-3T3 fibroblasts deprived of serum mitogens accumulated the cyclin-dependent kinase (CDK) inhibitor p27Kip1. This was correlated with inactivation of essential G1 cyclin-CDK complexes and with cell cycle arrest in G1. The ability of specific mitogens to allow transit through the restriction point paralleled their ability to down-regulate p27, and antisense inhibition of p27 expression prevented cell cycle arrest in response to mitogen depletion. Therefore, p27 is an essential component of the pathway that connects mitogenic signals to the cell cycle at the restriction point.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Coats, S -- Flanagan, W M -- Nourse, J -- Roberts, J M -- New York, N.Y. -- Science. 1996 May 10;272(5263):877-80.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Basic Sciences, Fred Hutchinson Cancer Research Center, Seattle, WA 98104, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/8629023" target="_blank"〉PubMed〈/a〉
    Keywords: 3T3 Cells ; Amino Acid Sequence ; Animals ; Base Sequence ; *Cell Cycle Proteins ; Culture Media ; Cyclin-Dependent Kinase Inhibitor p27 ; Cyclin-Dependent Kinases/*antagonists & inhibitors/metabolism ; Cyclins/metabolism ; Down-Regulation ; Enzyme Inhibitors/*metabolism ; Epidermal Growth Factor/pharmacology ; *G1 Phase ; Gene Expression/drug effects ; Insulin-Like Growth Factor I/pharmacology ; Mice ; Microtubule-Associated Proteins/biosynthesis/genetics/*metabolism ; Mitogens/pharmacology ; Molecular Sequence Data ; Oligonucleotides, Antisense/pharmacology ; Platelet-Derived Growth Factor/pharmacology ; Proto-Oncogene Proteins c-sis ; *Tumor Suppressor Proteins
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  • 29
    Publication Date: 1996-11-22
    Description: The Caenorhabditis elegans dauer larva is specialized for dispersal without growth and is formed under conditions of overcrowding and limited food. The daf-7 gene, required for transducing environmental cues that support continuous development with plentiful food, encodes a transforming growth factor-beta (TGF-beta) superfamily member. A daf-7 reporter construct is expressed in the ASI chemosensory neurons. Dauer-inducing pheromone inhibits daf-7 expression and promotes dauer formation, whereas food reactivates daf-7 expression and promotes recovery from the dauer state. When the food/pheromone ratio is high, the level of daf-7 mRNA peaks during the L1 larval stage, when commitment to non-dauer development is made.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Ren, P -- Lim, C S -- Johnsen, R -- Albert, P S -- Pilgrim, D -- Riddle, D L -- HD11239/HD/NICHD NIH HHS/ -- New York, N.Y. -- Science. 1996 Nov 22;274(5291):1389-91.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Molecular Biology Program and Division of Biological Sciences, 311 Tucker Hall, University of Missouri, Columbia, MO 65211, USA. riddle@biosci.mbp.missouri.edu〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/8910282" target="_blank"〉PubMed〈/a〉
    Keywords: Amino Acid Sequence ; Animals ; Animals, Genetically Modified ; Caenorhabditis elegans/genetics/*growth & development/metabolism ; *Caenorhabditis elegans Proteins ; Genes, Helminth ; Genes, Reporter ; Green Fluorescent Proteins ; Helminth Proteins/chemistry/genetics/*physiology ; Humans ; Larva/growth & development/metabolism ; Ligands ; Luminescent Proteins/genetics ; Molecular Sequence Data ; Mutation ; Neurons, Afferent/*metabolism ; Phenotype ; Pheromones/pharmacology ; Temperature ; Transforming Growth Factor beta/chemistry/genetics/*physiology ; Transgenes
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  • 30
    Publication Date: 1996-10-04
    Description: Afg3p and Rca1p are adenosine triphosphate (ATP)-dependent metalloproteases in yeast mitochondria. Cells lacking both proteins exhibit defects in respiration-dependent growth, degradation of mitochondrially synthesized proteins, and assembly of inner-membrane complexes. Defects in growth and protein assembly, but not in degradation, were suppressed by overproduction of yeast mitochondrial Lon, an ATP-dependent serine protease. Suppression by Lon was enhanced by inactivation of the proteolytic site and was prevented by mutation of the ATP-binding site. It is suggested that the mitochondrial proteases Lon, Afg3p, and Rca1p can also serve a chaperone-like function in the assembly of mitochondrial protein complexes.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Rep, M -- van Dijl, J M -- Suda, K -- Schatz, G -- Grivell, L A -- Suzuki, C K -- New York, N.Y. -- Science. 1996 Oct 4;274(5284):103-6.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Molecular Cell Biology, University of Amsterdam, Kruislaan 318, 1098 SM Amsterdam, The Netherlands.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/8810243" target="_blank"〉PubMed〈/a〉
    Keywords: ATP-Dependent Proteases ; Adenosine Triphosphatases/metabolism ; Adenosine Triphosphate/metabolism ; Amino Acid Sequence ; Base Sequence ; Binding Sites ; Electron Transport Complex IV/metabolism ; Fungal Proteins/*metabolism ; Heat-Shock Proteins/genetics/*metabolism ; Membrane Proteins/*metabolism ; *Metalloendopeptidases ; Mitochondria/*metabolism ; Mitochondrial Proteins ; Molecular Sequence Data ; Mutagenesis, Site-Directed ; Proton-Translocating ATPases/metabolism ; Saccharomyces cerevisiae/genetics/growth & development/*metabolism ; *Saccharomyces cerevisiae Proteins ; Serine Endopeptidases/genetics/*metabolism
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  • 31
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    American Association for the Advancement of Science (AAAS)
    Publication Date: 1996-03-08
    Description: Domain 5 is an essential active-site component of group II intron ribozymes. The role of backbone substituents in D5 function was explored through synthesis of a series of derivatives containing deoxynucleotides at each position along the D5 strand. Kinetic screens revealed that eight 2'-hydroxyl groups were likely to be critical for activity of D5. Through two separate methods, including competitive inhibition and direct kinetic analysis, effects on binding and chemistry were distinguished. Depending on their function, important 2'-hydroxyl groups lie on opposite faces of the molecule, defining distinct loci for molecular recognition and catalysis by D5.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Abramovitz, D L -- Friedman, R A -- Pyle, A M -- GM41371/GM/NIGMS NIH HHS/ -- GM50313/GM/NIGMS NIH HHS/ -- New York, N.Y. -- Science. 1996 Mar 8;271(5254):1410-3.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Biochemistry and Molecular Biophysics, Columbia University College of Physicians and Surgeons, New York, NY 10032, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/8596912" target="_blank"〉PubMed〈/a〉
    Keywords: Base Composition ; Base Sequence ; Binding Sites ; Catalysis ; Exons ; Hydrogen Bonding ; Hydroxyl Radical/chemistry ; *Introns ; Kinetics ; Models, Molecular ; Molecular Sequence Data ; Nucleic Acid Conformation ; Oligoribonucleotides/chemistry/metabolism ; RNA/metabolism ; RNA, Catalytic/chemistry/*metabolism
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  • 32
    Publication Date: 1996-10-25
    Description: A cytosolic yeast karyopherin, Kap104p, was isolated and shown to function in the nuclear import of a specific class of proteins. The protein bound directly to repeat-containing nucleoporins and to a cytosolic pool of two nuclear messenger RNA (mRNA) binding proteins, Nab2p and Nab4p. Depletion of Kap104p resulted in a rapid shift of Nab2p from the nucleus to the cytoplasm without affecting the localization of other nuclear proteins tested. This finding suggests that the major function of Kap104p lies in returning mRNA binding proteins to the nucleus after mRNA export.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Aitchison, J D -- Blobel, G -- Rout, M P -- New York, N.Y. -- Science. 1996 Oct 25;274(5287):624-7.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Laboratory of Cell Biology, Howard Hughes Medical Institute, Rockefeller University, 1230 York Avenue, New York, NY 10021, USA. blobel@rockvax.rockefeller.edu〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/8849456" target="_blank"〉PubMed〈/a〉
    Keywords: Amino Acid Sequence ; Biological Transport ; Carrier Proteins/chemistry/isolation & purification/*metabolism ; Cell Nucleus/*metabolism ; Cytosol/chemistry/metabolism ; Fungal Proteins/*metabolism ; *Karyopherins ; Membrane Proteins/metabolism ; Molecular Sequence Data ; Mutation ; Nuclear Envelope/metabolism ; *Nuclear Pore Complex Proteins ; Nuclear Proteins/*metabolism ; *Nucleocytoplasmic Transport Proteins ; RNA, Messenger/genetics/metabolism ; RNA-Binding Proteins/*metabolism ; Recombinant Fusion Proteins/metabolism ; Saccharomyces cerevisiae/*metabolism ; *Saccharomyces cerevisiae Proteins ; Temperature ; beta Karyopherins
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  • 33
    Publication Date: 1996-02-02
    Description: Rho, a Ras-like small guanosine triphosphatase, has been implicated in cytoskeletal responses to extracellular signals such as lysophosphatidic acid (LPA) to form stress fibers and focal contacts. The form of RhoA bound to guanosine triphosphate directly bound to and activated a serine-threonine kinase, protein kinase N (PKN). Activated RhoA formed a complex with PKN and activated it in COS-7 cells. PKN was phosphorylated in Swiss 3T3 cells stimulated with LPA, and this phosphorylation was blocked by treatment of cells with botulinum C3 exoenzyme. Activation of Rho may be linked directly to a serine-threonine kinase pathway.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Amano, M -- Mukai, H -- Ono, Y -- Chihara, K -- Matsui, T -- Hamajima, Y -- Okawa, K -- Iwamatsu, A -- Kaibuchi, K -- New York, N.Y. -- Science. 1996 Feb 2;271(5249):648-50.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Division of Signal Transduction, Nara Institute of Science and Technology, Ikoma, Japan.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/8571127" target="_blank"〉PubMed〈/a〉
    Keywords: 3T3 Cells ; ADP Ribose Transferases/pharmacology ; Amino Acid Sequence ; Animals ; *Botulinum Toxins ; Cell Line ; Chromatography, Affinity ; Enzyme Activation ; GTP Phosphohydrolases/*metabolism ; GTP-Binding Proteins/*metabolism ; Guanosine Triphosphate/metabolism ; Lysophospholipids/pharmacology ; Mice ; Molecular Sequence Data ; Phosphorylation ; Protein Kinase C/*metabolism ; Recombinant Fusion Proteins/metabolism ; rhoA GTP-Binding Protein
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  • 34
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    Unknown
    American Association for the Advancement of Science (AAAS)
    Publication Date: 1996-09-13
    Description: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Thiel, B L -- Viney, C -- New York, N.Y. -- Science. 1996 Sep 13;273(5281):1480-1.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/8801632" target="_blank"〉PubMed〈/a〉
    Keywords: Amino Acid Sequence ; Crystallization ; *Fibroins ; Magnetic Resonance Spectroscopy ; Microscopy, Electron ; Molecular Sequence Data ; Peptides/chemistry ; *Protein Structure, Secondary ; Proteins/*chemistry
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  • 35
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    American Association for the Advancement of Science (AAAS)
    Publication Date: 1996-06-14
    Description: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Rosch, P -- Willbold, D -- New York, N.Y. -- Science. 1996 Jun 14;272(5268):1672.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Biopolymers, University of Bayreuth, Germany. paul.rosch@uni-bayreuth.de〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/8658146" target="_blank"〉PubMed〈/a〉
    Keywords: Amino Acid Sequence ; Gene Products, tat/*chemistry ; Homeodomain Proteins/*chemistry ; Infectious Anemia Virus, Equine/*chemistry ; Magnetic Resonance Spectroscopy ; Molecular Sequence Data ; Protein Structure, Secondary ; Sequence Homology, Amino Acid
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  • 36
    Publication Date: 1996-08-30
    Description: During neurogenesis in Drosophila both neurons and nonneuronal cells are produced from a population of initially equivalent cells. The kuzbanian (kuz) gene described here is essential for the partitioning of neural and nonneuronal cells during development of both the central and peripheral nervous systems in Drosophila. Mosaic analyses indicated that kuz is required for cells to receive signals inhibiting the neural fate. These analyses further revealed that the development of a neuron requires a kuz-mediated positive signal from neighboring cells. The kuz gene encodes a metalloprotease-disintegrin protein with a highly conserved bovine homolog, raising the possibility that kuz homologs may act in similar processes during mammalian neurogenesis.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Rooke, J -- Pan, D -- Xu, T -- Rubin, G M -- New York, N.Y. -- Science. 1996 Aug 30;273(5279):1227-31.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Genetics, Boyer Center for Molecular Medicine, Yale University School of Medicine, New Haven, CT 06536, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/8703057" target="_blank"〉PubMed〈/a〉
    Keywords: Amino Acid Sequence ; Animals ; Cloning, Molecular ; Disintegrins/chemistry/genetics/*physiology ; Drosophila/cytology/embryology/*genetics/physiology ; *Drosophila Proteins ; *Genes, Insect ; Metalloendopeptidases/chemistry/genetics/*physiology ; Molecular Sequence Data ; Mosaicism ; Mutation ; Nervous System/embryology ; Neurons/*cytology ; Photoreceptor Cells, Invertebrate/cytology/embryology
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  • 37
    Publication Date: 1996-03-08
    Description: Haplotypes consisting of alleles at a short tandem repeat polymorphism (STRP) and an Alu deletion polymorphism at the CD4 locus on chromosome 12 were analyzed in more than 1600 individuals sampled from 42 geographically dispersed populations (13 African, 2 Middle Eastern, 7 European, 9 Asian, 3 Pacific, and 8 Amerindian). Sub-Saharan African populations had more haplotypes and exhibited more variability in frequencies of haplotypes than the Northeast African or non-African populations. The Alu deletion was nearly always associated with a single STRP allele in non-African and Northeast African populations but was associated with a wide range of STRP alleles in the sub-Saharan African populations. This global pattern of haplotype variation and linkage disequilibrium suggests a common and recent African origin for all non-African human populations.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Tishkoff, S A -- Dietzsch, E -- Speed, W -- Pakstis, A J -- Kidd, J R -- Cheung, K -- Bonne-Tamir, B -- Santachiara-Benerecetti, A S -- Moral, P -- Krings, M -- AA09379/AA/NIAAA NIH HHS/ -- HG00348/HG/NHGRI NIH HHS/ -- MH39239/MH/NIMH NIH HHS/ -- New York, N.Y. -- Science. 1996 Mar 8;271(5254):1380-7.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Genetics, Yale University School of Medicine, New Haven, CT 06520-8005, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/8596909" target="_blank"〉PubMed〈/a〉
    Keywords: Africa ; Alleles ; Animals ; Antigens, CD4/*genetics ; Base Sequence ; *Chromosomes, Human, Pair 12 ; *Evolution, Molecular ; Gene Frequency ; Genetic Variation ; Haplotypes ; Hominidae/*genetics ; Humans ; *Linkage Disequilibrium ; Molecular Sequence Data ; *Polymorphism, Genetic ; Primates/genetics ; Repetitive Sequences, Nucleic Acid ; Sequence Deletion
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  • 38
    Publication Date: 1996-05-17
    Description: The adenomatous polyposis coli gene (APC) is mutated in familial adenomatous polyposis and in sporadic colorectal tumors, and its product binds to the adherens junction protein beta-catenin. Overexpression of APC blocks cell cycle progression. The APC-beta-catenin complex was shown to bind to DLG, the human homolog of the Drosophila discs large tumor suppressor protein. This interaction required the carboxyl-terminal region of APC and the DLG homology repeat region of DLG. APC colocalized with DLG at the lateral cytoplasm in rat colon epithelial cells and at the synapse in cultured hippocampal neurons. These results suggest that the APC-DLG complex may participate in regulation of both cell cycle progression and neuronal function.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Matsumine, A -- Ogai, A -- Senda, T -- Okumura, N -- Satoh, K -- Baeg, G H -- Kawahara, T -- Kobayashi, S -- Okada, M -- Toyoshima, K -- Akiyama, T -- New York, N.Y. -- Science. 1996 May 17;272(5264):1020-3.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Oncogene Research, Institute for Microbial Diseases, Osaka University, Japan.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/8638125" target="_blank"〉PubMed〈/a〉
    Keywords: Adenomatous Polyposis Coli Protein ; Amino Acid Sequence ; Animals ; Cell Cycle ; Cells, Cultured ; Colon/chemistry/cytology ; Cytoskeletal Proteins/analysis/chemistry/*metabolism ; Drosophila ; *Drosophila Proteins ; Epithelial Cells ; Epithelium/chemistry ; Fluorescent Antibody Technique ; Hippocampus/chemistry/cytology ; Humans ; Insect Hormones/analysis/chemistry/*metabolism ; Mice ; Molecular Sequence Data ; Neurons/chemistry/cytology ; Protein Binding ; Recombinant Fusion Proteins/metabolism ; Synapses/chemistry ; *Trans-Activators ; *Tumor Suppressor Proteins ; beta Catenin
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  • 39
    Publication Date: 1996-04-05
    Description: Spiders produce a variety of silks that range from Lycra-like elastic fibers to Kevlar-like superfibers. A gene family from the spider Araneus diadematus was found to encode silk-forming proteins (fibroins) with different proportions of amorphous glycine-rich domains and crystal domains built from poly(alanine) and poly(glycine-alanine) repeat motifs. Spiders produce silks of different composition by gland-specific expression of this gene family, which allows for a range of mechanical properties according to the crystal-forming potential of the constituent fibroins. These principles of fiber property control may be important in the development of genetically engineered structural proteins.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Guerette, P A -- Ginzinger, D G -- Weber, B H -- Gosline, J M -- New York, N.Y. -- Science. 1996 Apr 5;272(5258):112-5.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Zoology, University of British Columbia, Vancouver, British Columbia, Canada.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/8600519" target="_blank"〉PubMed〈/a〉
    Keywords: Amino Acid Sequence ; Amino Acids/analysis ; Animals ; Base Sequence ; Blotting, Northern ; Crystallization ; DNA, Complementary/genetics ; Exocrine Glands/*metabolism ; Fibroins/*chemistry/genetics ; Gene Expression Regulation ; Gene Library ; *Insect Proteins ; Molecular Sequence Data ; Peptides/analysis ; Proline/analysis ; Protein Structure, Secondary ; Proteins/chemistry/genetics ; *Silk ; Spiders/*chemistry/genetics
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  • 40
    Publication Date: 1996-04-05
    Description: The rotavirus nonstructural glycoprotein NSP4 is an intracellular receptor that mediates the acquisition of a transient membrane envelope as subviral particles bud into the endoplasmic reticulum. NSP4 also causes an increase in intracellular calcium in insect cells. Purified NSP4 or a peptide corresponding to NSP4 residues 114 to 135 induced diarrhea in young (6 to 10 days old) CD1 mice. This disease response was age-dependent, dose-dependent, and specific. Electrophysiologic data from intestinal mucosa showed that the NSP4 114-135 peptide potentiates chloride secretion by a calcium-dependent signaling pathway. Diarrhea is induced when NSP4, acting as a viral enterotoxin, triggers a signal transduction pathway.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Ball, J M -- Tian, P -- Zeng, C Q -- Morris, A P -- Estes, M K -- DK 30144/DK/NIDDK NIH HHS/ -- New York, N.Y. -- Science. 1996 Apr 5;272(5258):101-4.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Division of Molecular Virology, Baylor College of Medicine, Houston, TX 77030, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/8600515" target="_blank"〉PubMed〈/a〉
    Keywords: *Aging ; Amino Acid Sequence ; Animals ; Calcium/metabolism ; Carbachol/pharmacology ; Chlorides/metabolism ; Colforsin/pharmacology ; Diarrhea/*etiology/prevention & control/virology ; Enterotoxins/*toxicity ; Glycoproteins/immunology/*toxicity ; Immune Sera/administration & dosage ; Immunization ; In Vitro Techniques ; Intestinal Mucosa/drug effects/secretion ; Mice ; Molecular Sequence Data ; Peptide Fragments/toxicity ; Receptors, Virus ; Rotavirus/*pathogenicity ; Rotavirus Infections/prevention & control/*virology ; Signal Transduction ; Toxins, Biological ; Viral Nonstructural Proteins/immunology/*toxicity
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  • 41
    Publication Date: 1996-04-19
    Description: Nitric oxide (NO) is associated with broad-spectrum antimicrobial activity of particular importance in infections caused by intracellular pathogens. An insertion mutation in the metL gene of Salmonella typhimurium conferred specific hypersusceptibility to S-nitrosothiol NO-donor compounds and attenuated virulence of the organism in mice. The metL gene product catalyzes two proximal metabolic steps required for homocysteine biosynthesis. S-Nitrosothiol resistance was restored by exogenous homocysteine or introduction of the metL gene on a plasmid. Measurement of expression of the homocysteine-sensitive metH gene indicated that S-nitrosothiols may directly deplete intracellular homocysteine. Homocysteine may act as an endogenous NO antagonist in diverse processes including infection, atherosclerosis, and neurologic disease.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉De Groote, M A -- Testerman, T -- Xu, Y -- Stauffer, G -- Fang, F C -- AI32463/AI/NIAID NIH HHS/ -- New York, N.Y. -- Science. 1996 Apr 19;272(5260):414-7.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Medicine, University of Colorado Health Sciences Center, Denver, CO 80262, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/8602531" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Aspartokinase Homoserine Dehydrogenase/genetics/*metabolism ; Base Sequence ; Drug Resistance, Microbial ; Female ; Glutathione/analogs & derivatives/pharmacology ; Homocysteine/metabolism/pharmacology/*physiology ; *Mercaptoethanol ; Mice ; Mice, Inbred C3H ; Microbial Sensitivity Tests ; Molecular Sequence Data ; Mutagenesis, Insertional ; Nitric Oxide/*antagonists & inhibitors/metabolism ; Nitroso Compounds/pharmacology ; S-Nitrosoglutathione ; *S-Nitrosothiols ; Salmonella Infections, Animal/microbiology ; Salmonella typhimurium/cytology/drug effects/pathogenicity/*physiology ; Virulence
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  • 42
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    American Association for the Advancement of Science (AAAS)
    Publication Date: 1996-06-21
    Description: The human beta T cell receptor (TCR) locus, comprising a complex family of genes, has been sequenced. The locus contains two types of coding elements--TCR elements (65 variable gene segments and two clusters of diversity, joining, and constant segments) and eight trypsinogen genes --that constitute 4.6 percent of the DNA. Genome-wide interspersed repeats and locus-specific repeats span 30 and 47 percent, respectively, of the 685-kilobase sequence. A comparison of the germline variable elements with their approximately 300 complementary DNA counterparts reveals marked differential patterns of variable gene expression, the importance of exonuclease activity in generating TCR diversity, and the predominant tendency for only functional variable elements to be present in complementary DNA libraries.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Rowen, L -- Koop, B F -- Hood, L -- New York, N.Y. -- Science. 1996 Jun 21;272(5269):1755-62.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Molecular Biotechnology, University of Washington, Seattle 98195-7730, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/8650574" target="_blank"〉PubMed〈/a〉
    Keywords: Amino Acid Sequence ; Base Sequence ; Biological Evolution ; Chromosomes, Human, Pair 7 ; Chromosomes, Human, Pair 9 ; DNA, Complementary/genetics ; Exons ; Genetic Variation ; Humans ; Introns ; Molecular Sequence Data ; *Multigene Family ; Polymorphism, Genetic ; Promoter Regions, Genetic ; Pseudogenes ; RNA Splicing ; Receptors, Antigen, T-Cell, alpha-beta/*genetics ; Repetitive Sequences, Nucleic Acid ; Translocation, Genetic ; Trypsinogen/genetics
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  • 43
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    American Association for the Advancement of Science (AAAS)
    Publication Date: 1996-03-08
    Description: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Bork, P -- New York, N.Y. -- Science. 1996 Mar 8;271(5254):1431-2; author reply 1434-5.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/8596918" target="_blank"〉PubMed〈/a〉
    Keywords: Alternative Splicing ; Amino Acid Sequence ; Animals ; DNA, Complementary ; Female ; Frameshifting, Ribosomal ; Humans ; Male ; Molecular Sequence Data ; Protein Sorting Signals/chemistry ; Protein-Tyrosine Kinases/*chemistry/genetics ; Proto-Oncogene Proteins/*chemistry/genetics ; Receptor Protein-Tyrosine Kinases/*chemistry/genetics ; Sequence Alignment ; Sperm-Ovum Interactions ; Spermatozoa/*chemistry
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  • 44
    Publication Date: 1996-04-12
    Description: Very few of the enzymes required for eukaryotic precursor ribosomal RNA (pre-rRNA) processing have been identified. Ribonuclease (RNase) MRP was characterized as a nuclease that cleaves mitochondrial replication primers, but it is predominantly nucleolar. Previous genetic evidence revealed that this ribonucleoprotein is required, directly or indirectly, for cleavage of the yeast pre-rRNA in vivo at site A3. Here, an in vitro processing system that accurately reproduces this cleavage is described. Biochemical purification and the use of extracts depleted of the MRP RNA demonstrate that endonucleolytic cleavage of the pre-rRNA is directly mediated by RNase MRP. This establishes a role for RNase MRP in the nucleolus.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Lygerou, Z -- Allmang, C -- Tollervey, D -- Seraphin, B -- New York, N.Y. -- Science. 1996 Apr 12;272(5259):268-70.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉European Molecular Biology Laboratory, Heidelberg, Germany.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/8602511" target="_blank"〉PubMed〈/a〉
    Keywords: Base Sequence ; Cell Nucleolus/enzymology ; Endoribonucleases/isolation & purification/*metabolism ; Molecular Sequence Data ; RNA Precursors/*metabolism ; *RNA Processing, Post-Transcriptional ; RNA, Ribosomal/*metabolism ; Ribonucleoproteins/metabolism ; Saccharomyces cerevisiae/*enzymology
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  • 45
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    American Association for the Advancement of Science (AAAS)
    Publication Date: 1996-10-11
    Description: In Saccharomyces cerevisiae, MAD2 is required for mitotic arrest if the spindle assembly is perturbed. The human homolog of MAD2 was isolated and shown to be a necessary component of the mitotic checkpoint in HeLa cells by antibody electroporation experiments. Human, or Homo sapiens, MAD2 (hsMAD2) was localized at the kinetochore after chromosome condensation but was no longer observed at the kinetochore in metaphase, suggesting that MAD2 might monitor the completeness of the spindle-kinetochore attachment. Finally, T47D, a human breast tumor cell line that is sensitive to taxol and nocodazole, had reduced MAD2 expression and failed to arrest in mitosis after nocodazole treatment. Thus, defects in the mitotic checkpoint may contribute to the sensitivity of certain tumors to mitotic spindle inhibitors.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Li, Y -- Benezra, R -- P30-CA-08748/CA/NCI NIH HHS/ -- New York, N.Y. -- Science. 1996 Oct 11;274(5285):246-8.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Cell Biology and Genetics Program, Memorial Sloan-Kettering Cancer Center, 1275 York Avenue, New York, NY 10021, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/8824189" target="_blank"〉PubMed〈/a〉
    Keywords: Amino Acid Sequence ; Anaphase ; *Calcium-Binding Proteins ; Carrier Proteins/chemistry/*genetics/*metabolism ; Cell Cycle Proteins ; Electroporation ; HeLa Cells ; Humans ; Interphase ; Kinetochores/*metabolism ; Mad2 Proteins ; Metaphase ; *Mitosis ; Molecular Sequence Data ; Nocodazole/pharmacology ; Paclitaxel/pharmacology ; Repressor Proteins ; Spindle Apparatus/drug effects/*metabolism ; Tumor Cells, Cultured
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  • 46
    Publication Date: 1996-02-02
    Description: The Rho guanosine 5'-triphosphatase (GTPase) cycles between the active guanosine triphosphate (GTP)-bound form and the inactive guanosine diphosphate-bound form and regulates cell adhesion and cytokinesis, but how it exerts these actions is unknown. The yeast two-hybrid system was used to clone a complementary DNA for a protein (designated Rhophilin) that specifically bound to GTP-Rho. The Rho-binding domain of this protein has 40 percent identity with a putative regulatory domain of a protein kinase, PKN. PKN itself bound to GTP-Rho and was activated by this binding both in vitro and in vivo. This study indicates that a serine-threonine protein kinase is a Rho effector and presents an amino acid sequence motif for binding to GTP-Rho that may be shared by a family of Rho target proteins.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Watanabe, G -- Saito, Y -- Madaule, P -- Ishizaki, T -- Fujisawa, K -- Morii, N -- Mukai, H -- Ono, Y -- Kakizuka, A -- Narumiya, S -- New York, N.Y. -- Science. 1996 Feb 2;271(5249):645-8.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Pharmacology, Kyoto University Faculty of Medicine, Japan.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/8571126" target="_blank"〉PubMed〈/a〉
    Keywords: Adaptor Proteins, Signal Transducing ; Amino Acid Sequence ; Animals ; Cell Line ; Cloning, Molecular ; Enzyme Activation ; GTP Phosphohydrolases/*metabolism ; GTP-Binding Proteins/chemistry/*metabolism ; Guanosine Triphosphate/metabolism ; Humans ; Membrane Proteins/*metabolism ; Mice ; Molecular Sequence Data ; Phosphorylation ; Protein Kinase C/chemistry/*metabolism ; *Protein-Serine-Threonine Kinases ; Recombinant Fusion Proteins/metabolism ; Saccharomyces cerevisiae/genetics ; Signal Transduction ; ras Proteins ; *rho GTP-Binding Proteins ; rhoA GTP-Binding Protein ; rhoB GTP-Binding Protein
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  • 47
    Publication Date: 1996-08-09
    Description: alpha2-Adrenergic receptors (alpha2ARs) present in the brainstem decrease blood pressure and are targets for clinically effective antihypertensive drugs. The existence of three alpha2AR subtypes, the lack of subtype-specific ligands, and the cross-reactivity of alpha2AR agonists with imidazoline receptors has precluded an understanding of the role of individual alpha2AR subtypes in the hypotensive response. Gene targeting was used to introduce a point mutation into the alpha2aAR subtype in the mouse genome. The hypotensive response to alpha2AR agonists was lost in the mutant mice, demonstrating that the alpha2aAR subtype plays a principal role in this response.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉MacMillan, L B -- Hein, L -- Smith, M S -- Piascik, M T -- Limbird, L E -- HL38120/HL/NHLBI NIH HHS/ -- HL43671/HL/NHLBI NIH HHS/ -- HL48638/HL/NHLBI NIH HHS/ -- New York, N.Y. -- Science. 1996 Aug 9;273(5276):801-3.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Pharmacology, Vanderbilt University, Nashville, TN 37232, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/8670421" target="_blank"〉PubMed〈/a〉
    Keywords: Adrenergic alpha-2 Receptor Agonists ; Adrenergic alpha-Agonists/pharmacology ; Animals ; Antihypertensive Agents/pharmacology ; Base Sequence ; Blood Pressure/drug effects/*physiology ; Brain Stem/physiology ; Brimonidine Tartrate ; Gene Targeting ; Heart Rate/drug effects/physiology ; Imidazoles/pharmacology ; Medetomidine ; Mice ; Mice, Inbred C57BL ; Molecular Sequence Data ; Point Mutation ; Quinoxalines/pharmacology ; Receptors, Adrenergic, alpha-2/genetics/metabolism/*physiology
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  • 48
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    American Association for the Advancement of Science (AAAS)
    Publication Date: 1996-10-25
    Description: Human leukocyte antigen (HLA)-DM is a critical participant in antigen presentation that catalyzes the release of class II-associated invariant chain-derived peptides (CLIP) from newly synthesized class II histocompatibility molecules, freeing the peptide-binding site for acquisition of antigenic peptides. The mechanism for the selective release of CLIP but not other peptides is unknown. DM was found to enhance the rate of peptide dissociation to an extent directly proportional to the intrinsic rate of peptide dissociation from HLA-DR, regardless of peptide sequence. Thus, CLIP is rapidly released in the presence of DM, because its intrinsic rate of dissociation is relatively high. In antigen presentation, DM has the potential to markedly enhance the rate of peptide exchange, favoring the presentation of peptides with slower intrinsic rates of dissociation.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Weber, D A -- Evavold, B D -- Jensen, P E -- AI30554/AI/NIAID NIH HHS/ -- AI33614/AI/NIAID NIH HHS/ -- New York, N.Y. -- Science. 1996 Oct 25;274(5287):618-20.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Pathology and Laboratory Medicine, Emory University School of Medicine, Atlanta, GA 30322, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/8849454" target="_blank"〉PubMed〈/a〉
    Keywords: Amino Acid Sequence ; Antigen Presentation ; Antigens, Differentiation, B-Lymphocyte/*metabolism ; Binding Sites ; HLA-D Antigens/*metabolism ; HLA-DR Antigens/immunology/*metabolism ; Histocompatibility Antigens Class II/*metabolism ; Humans ; Kinetics ; Molecular Sequence Data ; Peptides/immunology/*metabolism ; Recombinant Fusion Proteins/metabolism
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  • 49
    Publication Date: 1996-09-06
    Description: Subdivision of the limb primordia of Drosophila into anterior and posterior compartments triggers cell interactions that pattern the legs and wings. A comparable compartment-based mechanism is used to pattern the dorsal-ventral axis of the wing. Evidence is presented here for a mechanism based on cell interaction, rather than on compartment formation, that distinguishes dorsal from ventral in the leg. Mutual repression by Wingless and Decapentaplegic signaling systems generates a stable regulatory circuit by which each gene maintains its own expression in a spatially restricted domain. Compartment-independent patterning mechanisms may be used by other organisms during development.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Brook, W J -- Cohen, S M -- New York, N.Y. -- Science. 1996 Sep 6;273(5280):1373-7.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉European Molecular Biology Laboratory, Meyerhofstr 1, 69117 Heidelberg, Germany.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/8703069" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Animals, Genetically Modified ; Cell Lineage ; Drosophila/*genetics/growth & development ; *Drosophila Proteins ; Extremities/growth & development ; *Gene Expression Regulation, Developmental ; *Genes, Insect ; Insect Hormones/*genetics/physiology ; Molecular Sequence Data ; Morphogenesis ; Proto-Oncogene Proteins/*genetics/physiology ; Signal Transduction ; Wnt1 Protein
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  • 50
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    American Association for the Advancement of Science (AAAS)
    Publication Date: 1996-11-01
    Description: The neurotransmitter functions of nitric oxide are dependent on dynamic regulation of its biosynthetic enzyme, neuronal nitric oxide synthase (nNOS). By means of a yeast two-hybrid screen, a 10-kilodalton protein was identified that physically interacts with and inhibits the activity of nNOS. This inhibitor, designated PIN, appears to be one of the most conserved proteins in nature, showing 92 percent amino acid identity with the nematode and rat homologs. Binding of PIN destabilizes the nNOS dimer, a conformation necessary for activity. These results suggest that PIN may regulate numerous biological processes through its effects on nitric oxide synthase activity.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Jaffrey, S R -- Snyder, S H -- DA00074/DA/NIDA NIH HHS/ -- GM-07309/GM/NIGMS NIH HHS/ -- New York, N.Y. -- Science. 1996 Nov 1;274(5288):774-7.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Neuroscience, Johns Hopkins University School of Medicine, 725 North Wolfe Street, Baltimore, MD 21205, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/8864115" target="_blank"〉PubMed〈/a〉
    Keywords: Amino Acid Sequence ; Animals ; Carrier Proteins/chemistry/genetics/*metabolism/pharmacology ; Cell Line ; Cyclic GMP/metabolism ; Dimerization ; *Drosophila Proteins ; Dyneins ; Enzyme Inhibitors/chemistry/*metabolism/pharmacology ; Humans ; Molecular Sequence Data ; Molecular Weight ; Neurons/enzymology ; Nitric Oxide Synthase/*antagonists & inhibitors/metabolism ; Rats ; Recombinant Fusion Proteins/metabolism/pharmacology ; Saccharomyces cerevisiae ; Transfection
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  • 51
    Publication Date: 1996-01-05
    Description: The molecular origin of the exceptional mechanical properties of spider silk is unclear. This paper presents solid-state 2H nuclear magnetic resonance data from unoriented, oriented, and supercontracted fibers, indicating that the crystalline fraction of dragline silk consists of two types of alanine-rich regions, one that is highly oriented and one that is poorly oriented and less densely packed. A new model for the molecular-level structure of individual silk molecules and their arrangement in the fibers is proposed. These data suggest that it will be necessary to control the secondary structure of individual polymer molecules in order to obtain optimum properties in bio-inspired polymers.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Simmons, A H -- Michal, C A -- Jelinski, L W -- New York, N.Y. -- Science. 1996 Jan 5;271(5245):84-7.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Center for Advanced Technology in Biotechnology, Cornell University, Ithaca, NY 14853, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/8539605" target="_blank"〉PubMed〈/a〉
    Keywords: Alanine/analysis ; Algorithms ; Amino Acid Sequence ; Animals ; Crystallization ; Crystallography, X-Ray ; *Fibroins ; Glycine/analysis ; *Insect Proteins ; Magnetic Resonance Spectroscopy ; Models, Molecular ; Molecular Sequence Data ; Peptides/analysis ; Protein Conformation ; Protein Structure, Secondary ; Proteins/*chemistry ; Silk ; Spiders/*chemistry
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  • 52
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    American Association for the Advancement of Science (AAAS)
    Publication Date: 1996-06-14
    Description: Mitogen-activated protein kinase (MAPK) cascades, termed MAPK modules, channel extracellular signals into specific cellular responses. Chimeric molecules were constructed between p38 and p44 MAPKs, which transduce stress and growth factor signals, respectively. A discrete region of 40 residues located in the amono-terminal p38MAPK lobe directed the specificity of response to extracellular signals, whereas the p44MAPK chimera, expressed in vivo, redirected stress signals into early mitogenic responses, demonstrating the functional independence of these domains.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Brunet, A -- Pouyssegur, J -- New York, N.Y. -- Science. 1996 Jun 14;272(5268):1652-5.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Centre de Biochemie-CNRS, UMR134, Parc Valrose, Faculte des Sciences, Nice, France.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/8658140" target="_blank"〉PubMed〈/a〉
    Keywords: Amino Acid Sequence ; Animals ; Anisomycin/pharmacology ; Binding Sites ; Calcium-Calmodulin-Dependent Protein Kinases/genetics/*metabolism ; Cell Division ; Cell Line ; Cricetinae ; Cricetulus ; Enzyme Activation ; Gene Expression Regulation ; Genes, fos ; Growth Substances/metabolism ; Mice ; Mitogen-Activated Protein Kinase 3 ; *Mitogen-Activated Protein Kinases ; Molecular Sequence Data ; Phosphorylation/drug effects ; Protein Kinases/metabolism ; Protein-Serine-Threonine Kinases/metabolism ; Recombinant Fusion Proteins/genetics/metabolism ; Ribosomal Protein S6 Kinases ; Signal Transduction ; Sorbitol/pharmacology ; Substrate Specificity ; p38 Mitogen-Activated Protein Kinases
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  • 53
    Publication Date: 1996-12-20
    Description: The human Kv1.5 potassium channel (hKv1.5) contains proline-rich sequences identical to those that bind to Src homology 3 (SH3) domains. Direct association of the Src tyrosine kinase with cloned hKv1.5 and native hKv1.5 in human myocardium was observed. This interaction was mediated by the proline-rich motif of hKv1.5 and the SH3 domain of Src. Furthermore, hKv1.5 was tyrosine phosphorylated, and the channel current was suppressed, in cells coexpressing v-Src. These results provide direct biochemical evidence for a signaling complex composed of a potassium channel and a protein tyrosine kinase.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Holmes, T C -- Fadool, D A -- Ren, R -- Levitan, I B -- F32 NS009952/NS/NINDS NIH HHS/ -- New York, N.Y. -- Science. 1996 Dec 20;274(5295):2089-91.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Biochemistry and Volen Center for Complex Systems, Brandeis University, Waltham, MA 02254, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/8953041" target="_blank"〉PubMed〈/a〉
    Keywords: Amino Acid Sequence ; Cell Line ; Cloning, Molecular ; Humans ; Kv1.5 Potassium Channel ; Molecular Sequence Data ; Myocardium/chemistry ; Oncogene Protein pp60(v-src)/metabolism ; Patch-Clamp Techniques ; Phosphorylation ; Phosphotyrosine/metabolism ; Potassium Channels/chemistry/*metabolism ; *Potassium Channels, Voltage-Gated ; Recombinant Fusion Proteins/metabolism ; Signal Transduction ; Transfection ; src Homology Domains/*physiology ; src-Family Kinases/chemistry/*metabolism
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  • 54
    Publication Date: 1996-01-05
    Description: A complete and accurate set of experimental crystallographic phases to a resolution of 1.8 angstroms was obtained for a 230-residue dimeric fragment of rat mannose-binding protein A with the use of multiwavelength anomalous dispersion (MAD) phasing. An accurate image of the crystal structure could thus be obtained without resort to phases calculated from a model. Partially reduced disulfide bonds, local disorder, and differences in the mobility of chemically equivalent molecules are apparent in the experimental electron density map. A solvation layer is visible that includes well-ordered sites of hydration around polar and charged protein atoms, as well as diffuse, partially disordered solvent shells around exposed hydrophobic groups. Because the experimental phases and the resulting electron density map are free from the influence of a model, they provide a stringent test of theoretical models of macromolecular solvation, motion, and conformational heterogeneity.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Burling, F T -- Weis, W I -- Flaherty, K M -- Brunger, A T -- GM50565/GM/NIGMS NIH HHS/ -- New York, N.Y. -- Science. 1996 Jan 5;271(5245):72-7.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Howard Hughes Medical Institute, Yale University, New Haven, CT 06520, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/8539602" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Carrier Proteins/*chemistry ; Chemistry, Physical ; Crystallization ; *Crystallography, X-Ray ; Hydrogen Bonding ; Mannose/*metabolism ; *Mannose-Binding Lectin ; Models, Molecular ; Molecular Sequence Data ; Physicochemical Phenomena ; *Protein Conformation ; Rats ; Solvents ; Water
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  • 55
    Publication Date: 1996-02-23
    Description: Transmembrane signaling by bacterial chemotaxis receptors appears to require a conformational change within a receptor dimer. Dimers were engineered of the cytoplasmic domain of the Escherichia coli aspartate receptor that stimulated the kinase CheA in vitro. The folding free energy of the leucine-zipper dimerization domain was harnessed to twist the dimer interface of the receptor, which markedly affected the extent of CheA activation. Response to this twist was attenuated by modification of receptor regulatory sites, in the same manner as adaptation resets sensitivity to ligand in vivo. These results suggest that the normal allosteric activation of the chemotaxis receptor has been mimicked in a system that lacks both ligand-binding and transmembrane domains. The most stimulatory receptor dimer formed a species of tetrameric size.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Cochran, A G -- Kim, P S -- T32 AI07348-07/AI/NIAID NIH HHS/ -- New York, N.Y. -- Science. 1996 Feb 23;271(5252):1113-6.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Howard Hughes Medical Institute, Whitehead Institute for Biomedical Research, Department of Biology, Massachusetts Institute of Technology, Cambridge, MA 02142, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/8599087" target="_blank"〉PubMed〈/a〉
    Keywords: Amino Acid Sequence ; Bacterial Proteins/chemistry/*metabolism ; Chemoreceptor Cells ; Chemotaxis ; Cytoplasm/metabolism ; Enzyme Activation ; Escherichia coli/*metabolism ; *Escherichia coli Proteins ; Leucine Zippers ; Ligands ; Membrane Proteins/chemistry/*metabolism ; Methylation ; Molecular Sequence Data ; Phosphorylation ; Protein Conformation ; Protein Kinases/metabolism ; Protein Structure, Secondary ; Receptors, Amino Acid/chemistry/*metabolism ; *Receptors, Cell Surface ; Recombinant Fusion Proteins/chemistry/metabolism ; *Signal Transduction
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  • 56
    Publication Date: 1996-01-05
    Description: Developing insects repeatedly shed their cuticle by means of a stereotyped behavior called ecdysis, thought to be initiated by the brain peptide eclosion hormone. Here an ecdysis-triggering hormone, Mas-ETH, is described from the tobacco hornworm Manduca sexta. Mas-ETH contains 26 amino acids and is produced by a segmentally distributed endocrine system of epitracheal glands (EGs). The EGs undergo a marked reduction in volume, appearance, and immunohistochemical staining during ecdysis, at which time Mas-ETH is found in the hemolymph. Injection of EGs extract or synthetic Mas-ETH into pharate larvae, pupae, or adults initiates preecdysis within 2 to 10 minutes, followed by ecdysis. Sensitivity to injected Mas-ETH appears much earlier before ecdysis and occurs with shorter latency than that reported for eclosion hormone. The isolated central nervous system responds to Mas-ETH, but not to eclosion hormone, with patterned motor bursting corresponding to in vivo preecdysis and ecdysis. Mas-ETH may be an immediate blood-borne trigger for ecdysis through a direct action on the nervous system.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Zitnan, D -- Kingan, T G -- Hermesman, J L -- Adams, M E -- New York, N.Y. -- Science. 1996 Jan 5;271(5245):88-91.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Entomology, University of California, Riverside 92521, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/8539606" target="_blank"〉PubMed〈/a〉
    Keywords: Amino Acid Sequence ; Animals ; Central Nervous System/drug effects/physiology ; Endocrine Glands/chemistry/cytology/physiology ; Hemolymph/chemistry ; Insect Hormones/chemistry/isolation & purification/pharmacology/*physiology ; Larva/physiology ; Manduca/*chemistry/physiology ; Molecular Sequence Data ; Molecular Weight ; *Molting ; Motor Neurons/drug effects/physiology ; Peptides/chemistry/isolation & purification/pharmacology/*physiology ; Pupa/physiology
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  • 57
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    American Association for the Advancement of Science (AAAS)
    Publication Date: 1996-06-14
    Description: As a model for studying the generation of antibody diversity, a gene-targeted mouse was produced that is hemizygous for a rearranged V(D)J segment at the immunoglobulin (Ig) heavy chain locus, the other allele being nonfunctional. The mouse also has no functional kappa light chain allele. The heavy chain, when paired with any lambda light chain, is specific for the hapten (4-hydroxy-3-nitrophenyl) acetyl (NP). The primary repertoire of this quasi-monoclonal mouse is monospecific, but somatic hypermutation and secondary rearrangements change the specificity of 20 percent of the antigen receptors on B cells. The serum concentrations of the Ig isotypes are similar to those in nontransgenic littermates, but less than half of the serum IgM binds to NP, and none of the other isotypes do. Thus, neither network interactions nor random activation of a small fraction of the B cell population can account for serum Ig concentrations.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Cascalho, M -- Ma, A -- Lee, S -- Masat, L -- Wabl, M -- 1R01 GM37699/GM/NIGMS NIH HHS/ -- P60 AR20684/AR/NIAMS NIH HHS/ -- New York, N.Y. -- Science. 1996 Jun 14;272(5268):1649-52.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Microbiology and Immunology, University of California, San Francisco 94143-0670, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/8658139" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Antibodies, Monoclonal/*genetics/immunology ; *Antigens, CD ; Antigens, CD43 ; Antigens, CD45/immunology ; B-Lymphocytes/cytology/immunology ; Base Sequence ; Cell Line ; Cloning, Molecular ; Dna ; Flow Cytometry ; Gene Rearrangement, B-Lymphocyte, Heavy Chain ; Haptens/immunology ; Immunoglobulin Heavy Chains/*genetics/immunology ; Immunoglobulin Isotypes/genetics ; Immunoglobulin J-Chains/genetics ; Immunoglobulin Light Chains/genetics/immunology ; Immunoglobulin Variable Region/genetics ; Mice ; Mice, Inbred BALB C ; Mice, Inbred C57BL ; Mice, Knockout/genetics/*immunology ; Molecular Sequence Data ; Nitrophenols/immunology ; Phenylacetates ; Recombinant Proteins/genetics/immunology ; Sialoglycoproteins/immunology
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  • 58
    Publication Date: 1996-11-22
    Description: Large macromolecular assemblies have evolved as a means of compartmentalizing reactions in organisms lacking membrane-bounded compartments. A tricorn-shaped protease was isolated from the archaeon Thermoplasma and was shown to form a multisubunit proteolytic complex. The 120-kilodalton monomer assembled to form a hexameric toroid that could assemble further into a capsid structure. Tricorn protease appeared to act as the core of a proteolytic system; when it interacted with several smaller proteins, it displayed multicatalytic activities.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Tamura, T -- Tamura, N -- Cejka, Z -- Hegerl, R -- Lottspeich, F -- Baumeister, W -- New York, N.Y. -- Science. 1996 Nov 22;274(5291):1385-9.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Max-Planck-Institute for Biochemistry, D-82152 Martinsried, Germany.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/8910281" target="_blank"〉PubMed〈/a〉
    Keywords: Amino Acid Sequence ; Cloning, Molecular ; Cysteine Endopeptidases/metabolism ; Endopeptidases/*chemistry/genetics/isolation & purification/*metabolism ; Genes, Bacterial ; Microscopy, Electron ; Models, Molecular ; Molecular Sequence Data ; Molecular Weight ; Multienzyme Complexes/metabolism ; Peptides/metabolism ; Proteasome Endopeptidase Complex ; *Protein Conformation ; Protein Folding ; Protein Structure, Tertiary ; Recombinant Proteins/chemistry/metabolism ; Substrate Specificity ; Thermoplasma/*enzymology
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  • 59
    Publication Date: 1996-02-16
    Description: Variants of lambda repressor and cytochrome b562 translated from messenger RNAs without stop codons were modified by carboxyl terminal addition of an ssrA-encoded peptide tag and subsequently degraded by carboxyl terminal-specific proteases present in both the cytoplasm and periplasm of Escherichia coli. The tag appears to be added to the carboxyl terminus of the nascent polypeptide chain by cotranslational switching of the ribosome from the damaged messenger RNA to ssrA RNA.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Keiler, K C -- Waller, P R -- Sauer, R T -- AI-15706/AI/NIAID NIH HHS/ -- AI-16892/AI/NIAID NIH HHS/ -- New York, N.Y. -- Science. 1996 Feb 16;271(5251):990-3.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Biology, Massachusetts Institute of Technology, Cambridge, MA 02139-4307, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/8584937" target="_blank"〉PubMed〈/a〉
    Keywords: Alanine ; Amino Acid Sequence ; Base Sequence ; Cloning, Molecular ; Codon, Terminator ; Cytochrome b Group/genetics/*metabolism ; *DNA-Binding Proteins ; Endopeptidases/metabolism ; Escherichia coli/genetics/metabolism ; *Escherichia coli Proteins ; Molecular Sequence Data ; Peptides/metabolism ; Protein Biosynthesis ; *Protein Processing, Post-Translational ; RNA, Bacterial/genetics/*metabolism ; RNA, Messenger/genetics/*metabolism ; Repressor Proteins/genetics/*metabolism ; Viral Proteins ; Viral Regulatory and Accessory Proteins
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  • 60
    Publication Date: 1996-06-28
    Description: A chloroplast RNA polymerase sigma factor is encoded by a nuclear gene, sigA, in the red alga Cyanidium caldarium RK-1. The encoded protein functions as an RNA polymerase sigma factor in vitro and it is localized to the chloroplast in vivo. SigA shows high sequence similarity to the sigma factors of cyanobacteria, which is indicative of the ancestral endosymbiotic event and subsequent transfer of the sigA gene to the nuclear genome.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Tanaka, K -- Oikawa, K -- Ohta, N -- Kuroiwa, H -- Kuroiwa, T -- Takahashi, H -- New York, N.Y. -- Science. 1996 Jun 28;272(5270):1932-5.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Institute of Molecular and Cellular Biosciences, University of Tokyo, Japan.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/8658165" target="_blank"〉PubMed〈/a〉
    Keywords: Amino Acid Sequence ; Base Sequence ; Blotting, Southern ; Cell Nucleus/genetics ; Chloroplasts/*enzymology/genetics ; DNA-Directed RNA Polymerases/chemistry/*genetics/isolation & ; purification/metabolism ; Molecular Sequence Data ; Recombinant Proteins/isolation & purification/metabolism ; Rhodophyta/enzymology/*genetics/ultrastructure ; Sequence Alignment ; Sigma Factor/chemistry/*genetics/isolation & purification/metabolism
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  • 61
    Publication Date: 1996-01-26
    Description: High density lipoprotein (HDL) and low density lipoprotein (LDL) are cholesterol transport particles whose plasma concentrations are directly (LDL) and inversely (HDL) correlated with risk for atherosclerosis. LDL catabolism involves cellular uptake and degradation of the entire particle by a well-characterized receptor. HDL, in contrast, selectively delivers its cholesterol, but not protein, to cells by unknown receptors. Here it is shown that the class B scavenger receptor SR-BI is an HDL receptor. SR-BI binds HDL with high affinity, is expressed primarily in liver and nonplacental steroidogenic tissues, and mediates selective cholesterol uptake by a mechanism distinct from the classic LDL receptor pathway.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Acton, S -- Rigotti, A -- Landschulz, K T -- Xu, S -- Hobbs, H H -- Krieger, M -- HL09047/HL/NHLBI NIH HHS/ -- HL41484/HL/NHLBI NIH HHS/ -- HL52212/HL/NHLBI NIH HHS/ -- etc. -- New York, N.Y. -- Science. 1996 Jan 26;271(5248):518-20.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Biology, Massachusetts Institute of Technology, Cambridge 02139, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/8560269" target="_blank"〉PubMed〈/a〉
    Keywords: Adrenal Glands/metabolism ; Animals ; Antigens, CD36/genetics/*metabolism ; CHO Cells ; *Carrier Proteins ; Cholesterol/metabolism ; Cholesterol Esters/*metabolism ; Cricetinae ; Female ; Fluorescent Dyes/metabolism ; Lipoproteins, HDL/*metabolism ; Liver/metabolism ; *Membrane Proteins ; Mice ; Molecular Sequence Data ; Ovary/metabolism ; *RNA-Binding Proteins ; *Receptors, Immunologic ; Receptors, LDL/metabolism ; Receptors, Lipoprotein/*metabolism ; Receptors, Scavenger ; Scavenger Receptors, Class B ; Thiazines/metabolism ; Transfection
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  • 62
    Publication Date: 1996-07-12
    Description: The small guanosine triphosphatase Rho is implicated in myosin light chain (MLC) phosphorylation, which results in contraction of smooth muscle and interaction of actin and myosin in nonmuscle cells. The guanosine triphosphate (GTP)-bound, active form of RhoA (GTP.RhoA) specifically interacted with the myosin-binding subunit (MBS) of myosin phosphatase, which regulates the extent of phosphorylation of MLC. Rho-associated kinase (Rho-kinase), which is activated by GTP.RhoA, phosphorylated MBS and consequently inactivated myosin phosphatase. Overexpression of RhoA or activated RhoA in NIH 3T3 cells increased phosphorylation of MBS and MLC. Thus, Rho appears to inhibit myosin phosphatase through the action of Rho-kinase.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Kimura, K -- Ito, M -- Amano, M -- Chihara, K -- Fukata, Y -- Nakafuku, M -- Yamamori, B -- Feng, J -- Nakano, T -- Okawa, K -- Iwamatsu, A -- Kaibuchi, K -- New York, N.Y. -- Science. 1996 Jul 12;273(5272):245-8.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Division of Signal Transduction, Nara Institute of Science and Technology, Ikoma 630-01, Japan.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/8662509" target="_blank"〉PubMed〈/a〉
    Keywords: 3T3 Cells ; Actins/metabolism ; Amino Acid Sequence ; Animals ; Cattle ; GTP Phosphohydrolases/*metabolism ; GTP-Binding Proteins/*metabolism ; Intracellular Signaling Peptides and Proteins ; Isopropyl Thiogalactoside/pharmacology ; Mice ; Molecular Sequence Data ; Muscle Contraction ; Muscle, Smooth/physiology ; Myosin Light Chains/metabolism ; Myosin-Light-Chain Phosphatase ; Oxazoles/pharmacology ; Phosphoprotein Phosphatases/*antagonists & inhibitors/metabolism ; Phosphorylation ; Protein-Serine-Threonine Kinases/*metabolism ; rho-Associated Kinases ; rhoA GTP-Binding Protein
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  • 63
    Publication Date: 1996-02-09
    Description: Mast cells originate from hematopoietic stem cells, but the mast cell-committed precursor has not been identified. In the study presented here, a cell population in murine fetal blood that fulfills the criteria of progenitor mastocytes was identified. It is defined by the phenotype Thy-1loc-Kithi, contains cytoplasmic granules, and expresses RNAs encoding mast cell-associated proteases but lacks expression of the high-affinity immunoglobulin E receptor. Thy-1loc-Kithi cells generated functionally competent mast cells at high frequencies in vitro but lacked developmental potential for other hematopoietic lineages. When transferred intraperitoneally, this population reconstituted the peritoneal mast cell compartment of genetically mast cell-deficient W/Wv mice to wild-type levels.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Rodewald, H R -- Dessing, M -- Dvorak, A M -- Galli, S J -- AI-33372/AI/NIAID NIH HHS/ -- AI/CA-23990/AI/NIAID NIH HHS/ -- CA/AI-72074/CA/NCI NIH HHS/ -- New York, N.Y. -- Science. 1996 Feb 9;271(5250):818-22.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Basel Institute for Immunology, Switzerland.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/8629001" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Antigens, Thy-1/analysis ; Base Sequence ; Cell Lineage ; Cell Transplantation ; Cells, Cultured ; Cytoplasmic Granules/ultrastructure ; Endopeptidases/genetics/metabolism ; Fetal Blood ; Hematopoietic Stem Cells/*cytology/physiology/ultrastructure ; Immunophenotyping ; Interleukin-3/pharmacology ; Mast Cells/*cytology/physiology/ultrastructure ; Mice ; Molecular Sequence Data ; Peritoneal Cavity/cytology ; Proto-Oncogene Proteins c-kit/analysis ; RNA, Messenger/genetics/metabolism ; Receptors, IgE/analysis/genetics ; Stem Cell Factor/pharmacology
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  • 64
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    American Association for the Advancement of Science (AAAS)
    Publication Date: 1996-03-15
    Description: Active transport of proteins and RNAs between the nucleus and cytoplasm is a major process in eukaryotic cells. Recently, factors that recognize transport substrates and mediate nuclear import or export have been characterized, revealing interactions that target substrates to the nuclear pore complexes, through which translocation occurs. Translocation requires energy, and for the import process this energy is at least partly consumed by the action of the small guanosine triphosphatase Ran. In the first half of the review, some of the well-established general background information on nucleocytoplasmic transport is discussed. The second half describes recent information on the mechanistic details of nuclear import and export as well as major unresolved issues such as how directionality is conferred on either import or export. The whole review is slanted toward discussion of metazoan cells.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Gorlich, D -- Mattaj, I W -- Wellcome Trust/United Kingdom -- New York, N.Y. -- Science. 1996 Mar 15;271(5255):1513-8.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Wellcome/Cancer Research Campaign Institute, Cambridge, UK.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/8599106" target="_blank"〉PubMed〈/a〉
    Keywords: Amino Acid Sequence ; Animals ; Biological Transport, Active ; Cell Nucleus/*metabolism ; Cytoplasm/*metabolism ; GTP-Binding Proteins/metabolism ; Humans ; Karyopherins ; Molecular Sequence Data ; Nuclear Proteins/metabolism ; Protein Sorting Signals/metabolism ; Proteins/*metabolism ; RNA/*metabolism ; RNA Cap-Binding Proteins ; RNA-Binding Proteins/metabolism ; ran GTP-Binding Protein
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  • 65
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    American Association for the Advancement of Science (AAAS)
    Publication Date: 1996-07-19
    Description: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Corey, D P -- Garcia-Anoveros, J -- New York, N.Y. -- Science. 1996 Jul 19;273(5273):323-4.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Howard Hughes Medical Institute, Boston, MA 02114, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/8685718" target="_blank"〉PubMed〈/a〉
    Keywords: Amino Acid Sequence ; Animals ; Caenorhabditis elegans/genetics/*physiology ; Genes, Helminth ; Helminth Proteins/chemistry/genetics/*physiology ; Molecular Sequence Data ; Muscle Contraction ; Mutation ; Phenotype ; Sensation/genetics/*physiology ; Sodium Channels/chemistry/genetics/*physiology ; Touch/genetics/physiology
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  • 66
    Publication Date: 1996-03-08
    Description: Glutamic acid-203 of the alpha subunit of transducin (alphaT) resides within a domain that undergoes a guanosine triphosphate (GTP)-induced conformational change that is essential for effector recognition. Changing the glutamic acid to an alanine in bovine alpha(T) yielded an alpha subunit (alpha(T)E203A) that was fully dependent on rhodopsin for GTP-guanosine diphosphate (GDP) exchange and showed GTP hydrolytic activity similar to that measured for wild-type alpha(T). However, unlike the wild-type protein, the GDP-bound form of alpha(T)E203A was constitutively active toward the effector of transducin, the cyclic guanosine monophosphate phosphodiesterase. Thus, the alpha(T)E203A mutant represents a short-circuited protein switch that no longer requires GTP for the activation of the effector target phosphodiesterase.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Mittal, R -- Erickson, J W -- Cerione, R A -- New York, N.Y. -- Science. 1996 Mar 8;271(5254):1413-6.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Pharmacology, Cornell University, Ithaca, NY 14853-6401, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/8596913" target="_blank"〉PubMed〈/a〉
    Keywords: 3',5'-Cyclic-GMP Phosphodiesterases/*metabolism ; Adenosine Diphosphate Ribose/metabolism ; Alanine/chemistry ; Animals ; Base Sequence ; Cattle ; Enzyme Activation ; Glutamic Acid/chemistry ; Guanosine 5'-O-(3-Thiotriphosphate)/metabolism ; Guanosine Diphosphate/metabolism ; Guanosine Triphosphate/*metabolism ; Molecular Sequence Data ; Mutation ; Protein Conformation ; Protein Structure, Secondary ; Protein Structure, Tertiary ; Recombinant Fusion Proteins ; Rhodopsin/metabolism ; Transducin/chemistry/genetics/*metabolism
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  • 67
    Publication Date: 1996-07-26
    Description: B and T lymphocytes undergoing apoptosis in response to anti-immunoglobulin M antibodies and dexamethasone, respectively, were found to have increased amounts of messenger RNA for the inositol 1,4,5-trisphosphate receptor (IP3R) and increased amounts of IP3R protein. Immunohistochemical analysis revealed that the augmented receptor population was localized to the plasma membrane. Type 3 IP3R (IP3R3) was selectively increased during apoptosis, with no enhancement of type 1 IP3R (IP3R1). Expression of IP3R3 antisense constructs in S49 T cells blocked dexamethasone-induced apoptosis, whereas IP3R3 sense, IP3R1 sense, or IP3R1 antisense control constructs did not block cell death. Thus, the increases in IP3R3 may be causally related to apoptosis.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Khan, A A -- Soloski, M J -- Sharp, A H -- Schilling, G -- Sabatini, D M -- Li, S H -- Ross, C A -- Snyder, S H -- AI-20922/AI/NIAID NIH HHS/ -- AI-37934/AI/NIAID NIH HHS/ -- MH43040/MH/NIMH NIH HHS/ -- etc. -- New York, N.Y. -- Science. 1996 Jul 26;273(5274):503-7.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Neuroscience, 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/8662540" target="_blank"〉PubMed〈/a〉
    Keywords: Amino Acid Sequence ; Animals ; *Apoptosis ; B-Lymphocytes/*cytology/metabolism ; Base Sequence ; Calcium/metabolism ; Calcium Channels/genetics/immunology/*metabolism ; Cell Line ; Cell Membrane/metabolism ; Cells, Cultured ; DNA, Antisense ; Dexamethasone/pharmacology ; Immunoblotting ; Inositol 1,4,5-Trisphosphate/*metabolism ; Inositol 1,4,5-Trisphosphate Receptors ; Mice ; Molecular Sequence Data ; Receptors, Cytoplasmic and Nuclear/genetics/immunology/*metabolism ; T-Lymphocytes/*cytology/metabolism ; Transfection ; Tumor Cells, Cultured
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  • 68
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    American Association for the Advancement of Science (AAAS)
    Publication Date: 1996-03-08
    Description: A class of dyes, BODIPY fluorophores, has been identified for automated DNA sequencing that has improved spectral characteristics compared with conventional fluorescein and rhodamine dyes. Single and double BODIPY dye primers were characterized in commercially available DNA sequencers and showed uniform electrophoretic mobilities and high fluorescence intensities. The improved physical properties of BODIPY dye primers were demonstrated by direct base-calling from the unprocessed fluorescent signals and improved heterozygote analyses of mixed-base populations. The high sensitivity of BODIPY dye primers requires at least 33 percent less reagent consumed per reaction than conventional dye primers, which should affect the costs of large genome-sequencing efforts.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Metzker, M L -- Lu, J -- Gibbs, R A -- 1 P30 HG00210/HG/NHGRI NIH HHS/ -- 1 RO1 HG00823/HG/NHGRI NIH HHS/ -- AI07483/AI/NIAID NIH HHS/ -- New York, N.Y. -- Science. 1996 Mar 8;271(5254):1420-2.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Molecular and Human Genetics, Baylor College of Medicine, Houston, TX 77030, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/8596915" target="_blank"〉PubMed〈/a〉
    Keywords: Autoanalysis ; Base Sequence ; *Boron Compounds/chemistry ; DNA Primers ; Electrophoresis, Polyacrylamide Gel ; *Fluorescent Dyes/chemistry ; Molecular Sequence Data ; Sensitivity and Specificity ; Sequence Analysis, DNA/*methods ; Spectrometry, Fluorescence
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  • 69
    Publication Date: 1996-09-06
    Description: A chimeric oligonucleotide composed of DNA and modified RNA residues was used to direct correction of the mutation in the hemoglobin betaS allele. After introduction of the chimeric molecule into lymphoblastoid cells homozygous for the betaS mutation, there was a detectable level of gene conversion of the mutant allele to the normal sequence. The efficient and specific conversion directed by chimeric molecules may hold promise as a therapeutic method for the treatment of genetic diseases.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Cole-Strauss, A -- Yoon, K -- Xiang, Y -- Byrne, B C -- Rice, M C -- Gryn, J -- Holloman, W K -- Kmiec, E B -- New York, N.Y. -- Science. 1996 Sep 6;273(5280):1386-9.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Pharmacology, Kimmel Cancer Center, Thomas Jefferson University, 233 South 10th Street, Philadelphia, PA 19107, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/8703073" target="_blank"〉PubMed〈/a〉
    Keywords: Alleles ; Anemia, Sickle Cell/*genetics/therapy ; Base Sequence ; Cells, Cultured ; *Gene Conversion ; Genetic Therapy ; Globins/genetics ; Hemoglobin, Sickle/*genetics ; Humans ; Lymphocytes ; Molecular Sequence Data ; Oligodeoxyribonucleotides/*genetics ; Oligoribonucleotides/*genetics ; Point Mutation ; Polymerase Chain Reaction ; Polymorphism, Restriction Fragment Length ; *Transfection
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  • 70
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    American Association for the Advancement of Science (AAAS)
    Publication Date: 1996-11-08
    Description: Mutations in the p53 tumor suppressor are among the most frequently observed genetic alterations in human cancer and map to the 200-amino acid core domain of the protein. The core domain contains the sequence-specific DNA binding activity and the in vitro 53BP2 protein binding activity of p53. The crystal structure of the p53 core domain bound to the 53BP2 protein, which contains an SH3 (Src homology 3) domain and four ankyrin repeats, revealed that (i) the SH3 domain binds the L3 loop of p53 in a manner distinct from that of previously characterized SH3-polyproline peptide complexes, and (ii) an ankyrin repeat, which forms an L-shaped structure consisting of a beta hairpin and two alpha helices, binds the L2 loop of p53. The structure of the complex shows that the 53BP2 binding site on the p53 core domain consists of evolutionarily conserved regions that are frequently mutated in cancer and that it overlaps the site of DNA binding. The six most frequently observed p53 mutations disrupt 53BP2 binding in vitro. The structure provides evidence that the 53BP2-p53 complex forms in vivo and may have a critical role in the p53 pathway of tumor suppression.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Gorina, S -- Pavletich, N P -- CA65698/CA/NCI NIH HHS/ -- New York, N.Y. -- Science. 1996 Nov 8;274(5289):1001-5.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Cellular Biochemistry and Biophysics Program, Memorial Sloan-Kettering Cancer Center, New York, NY 10021, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/8875926" target="_blank"〉PubMed〈/a〉
    Keywords: Amino Acid Sequence ; Ankyrins/*chemistry ; Apoptosis Regulatory Proteins ; Binding Sites ; Carrier Proteins/*chemistry/metabolism ; Crystallography, X-Ray ; DNA/metabolism ; Humans ; Hydrogen Bonding ; Models, Molecular ; Molecular Sequence Data ; Mutation ; Neoplasms/genetics ; Protein Binding ; *Protein Conformation ; Protein Folding ; Protein Structure, Secondary ; Protein Structure, Tertiary ; Recombinant Fusion Proteins/chemistry/metabolism ; Tumor Suppressor Protein p53/*chemistry/genetics/metabolism ; *src Homology Domains
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  • 71
    Publication Date: 1996-05-03
    Description: A mouse model of familial hypertrophic cardiomyopathy (FHC) was generated by the introduction of an Arg 403 --〉 Gln mutation into the alpha cardiac myosin heavy chain (MHC) gene. Homozygous alpha MHC 403/403 mice died 7 days after birth, and sedentary heterozygous alpha MHC 403/+ mice survived for 1 year. Cardiac histopathology and dysfunction in the alpha MHC 403/+ mice resembled human FHC. Cardiac dysfunction preceded histopathologic changes, and myocyte disarray, hypertrophy, and fibrosis increased with age. Young male alpha MHC 403/+ mice showed more evidence of disease than did their female counterparts. Preliminary results suggested that exercise capacity may have been compromised in the alpha MHC 403/+ mice. This mouse model may help to define the natural history of FHC.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Geisterfer-Lowrance, A A -- Christe, M -- Conner, D A -- Ingwall, J S -- Schoen, F J -- Seidman, C E -- Seidman, J G -- New York, N.Y. -- Science. 1996 May 3;272(5262):731-4.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Howard Hughes Medical 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/8614836" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Base Sequence ; Cardiac Output ; Cardiomyopathy, Hypertrophic/*genetics/pathology/physiopathology ; *Disease Models, Animal ; Female ; Gene Transfer Techniques ; Heart/*physiopathology ; Heterozygote ; Homozygote ; Humans ; Male ; Mice ; Mice, Mutant Strains ; Molecular Sequence Data ; Mutation ; Myocardium/chemistry/*pathology ; Myosin Heavy Chains/*genetics ; Physical Exertion ; Sex Characteristics ; Ventricular Function, Left
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  • 72
    Publication Date: 1996-02-09
    Description: Genetic studies indicated that the Drosophila melanogaster protein REAPER (RPR) controls apoptosis during embryo development. Induction of RPR expression in Drosophila Schneider cells rapidly stimulated apoptosis. RPR-mediated apoptosis was blocked by N-benzyloxycarbonyl-Val-Ala-Asp-fluoromethylketone (Z-VAD-fmk), which suggests that an interleukin-1 beta converting enzyme (ICE)-like protease is required for RPR function. RPR-induced apoptosis was associated with increased ceramide production that was also blocked by Z-VAD-fmk, which suggests that ceramide generation requires an ICE-like protease as well. Thus, the intracellular RPR protein uses cell death signaling pathways similar to those used by the vertebrate transmembrane receptors Fas (CD95) and tumor necrosis factor receptor type 1.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Pronk, G J -- Ramer, K -- Amiri, P -- Williams, L T -- New York, N.Y. -- Science. 1996 Feb 9;271(5250):808-10.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Chiron Corporation, Emeryville, CA 94608, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/8628997" target="_blank"〉PubMed〈/a〉
    Keywords: Amino Acid Chloromethyl Ketones/pharmacology ; Amino Acid Sequence ; Animals ; *Apoptosis/drug effects ; Caspase 1 ; Cell Line ; Ceramides/*metabolism/pharmacology ; Copper/pharmacology ; Copper Sulfate ; Cysteine Endopeptidases/*metabolism ; *Drosophila Proteins ; Drosophila melanogaster/*cytology/embryology/genetics/metabolism ; Enzyme Activation ; Gene Expression ; Molecular Sequence Data ; Peptides/genetics/*physiology ; Protease Inhibitors/pharmacology ; Signal Transduction ; Transfection
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  • 73
    Publication Date: 1996-08-30
    Description: Pycnodysostosis, an autosomal recessive osteochondrodysplasia characterized by osteosclerosis and short stature, maps to chromosome 1q21. Cathepsin K, a cysteine protease gene that is highly expressed in osteoclasts, localized to the pycnodysostosis region. Nonsense, missense, and stop codon mutations in the gene encoding cathepsin K were identified in patients. Transient expression of complementary DNA containing the stop codon mutation resulted in messenger RNA but no immunologically detectable protein. Thus, pycnodysostosis results from gene defects in a lysosomal protease with highest expression in osteoclasts. These findings suggest that cathepsin K is a major protease in bone resorption, providing a possible rationale for the treatment of disorders such as osteoporosis and certain forms of arthritis.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Gelb, B D -- Shi, G P -- Chapman, H A -- Desnick, R J -- R01 DK31775/DK/NIDDK NIH HHS/ -- R01 HL44816/HL/NHLBI NIH HHS/ -- R37 DK34045/DK/NIDDK NIH HHS/ -- etc. -- New York, N.Y. -- Science. 1996 Aug 30;273(5279):1236-8.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Human Genetics and Division of Pediatric Cardiology, Mount Sinai School of Medicine, New York, NY 10029, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/8703060" target="_blank"〉PubMed〈/a〉
    Keywords: Amino Acid Sequence ; Base Sequence ; Bone Matrix/metabolism ; Bone Resorption ; Cathepsin K ; Cathepsins/deficiency/*genetics/metabolism ; Chromosome Mapping ; Chromosomes, Human, Pair 1 ; Codon, Terminator ; Dinucleoside Phosphates/genetics ; Humans ; Lysosomal Storage Diseases/enzymology/*genetics ; Lysosomes/*enzymology ; Molecular Sequence Data ; Mutagenesis, Site-Directed ; Mutation ; Osteochondrodysplasias/enzymology/*genetics ; Osteoclasts/*enzymology ; Transfection
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  • 74
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    Unknown
    American Association for the Advancement of Science (AAAS)
    Publication Date: 1996-11-08
    Description: Although cytokinin plays a central role in plant development, little is known about cytokinin signal transduction. Five Arabidopsis thaliana mutants that exhibit typical cytokinin responses, including rapid cell division and shoot formation in tissue culture in the absence of exogenous cytokinin, were isolated by activation transferred DNA tagging. A gene, CKI1, which was tagged in four of the five mutants and induced typical cytokinin responses after introduction and overexpression in plants, was cloned. CKI1 encodes a protein similar to the two-component regulators. These results suggest that CKI1 is involved in cytokinin signal transduction, possibly as a cytokinin receptor.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Kakimoto, T -- New York, N.Y. -- Science. 1996 Nov 8;274(5289):982-5.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Biology, Graduate School of Science, Osaka University, Toyonaka, Osaka 560, Japan.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/8875940" target="_blank"〉PubMed〈/a〉
    Keywords: Amino Acid Sequence ; Arabidopsis/genetics/*physiology ; *Arabidopsis Proteins ; Cloning, Molecular ; Cytokinins/pharmacology/*physiology ; DNA, Bacterial/genetics ; DNA, Complementary/genetics ; DNA, Plant/genetics ; Ethylenes/metabolism ; Genes, Plant ; Molecular Sequence Data ; Mutation ; Open Reading Frames ; Plant Proteins/chemistry/metabolism ; Polymorphism, Restriction Fragment Length ; Protein Kinases/chemistry/genetics/*physiology ; *Receptors, Cell Surface ; Sequence Homology, Amino Acid ; *Signal Transduction ; Transformation, Genetic
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  • 75
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    Unknown
    American Association for the Advancement of Science (AAAS)
    Publication Date: 1996-05-10
    Description: Nuclear messenger RNA splicing involves multiple interactions between the five spliceosomal small nuclear ribonucleoprotein particles (snRNPs) U1, U2, U4, U5, and U6 and numerous spliceosomal proteins. Here it is shown that binding of a 2'-O-methyl-oligoribonucleotide complementary to U5 small nuclear RNA (snRNA) nucleotides 68 to 88 (BU5Ae) disrupts the initial U4/U5/U6 tri-snRNP complex, enhances the U2/U6 interaction, and induces a Ul/U4/U5 snRNP complex. The Ul/U4/U5 snRNP complex interacts specifically with an RNA oligonucleotide containing the 5' splice site sequence and may therefore represent a transitional stage in the displacement of U1 from the 5' splice site by U5 snRNP.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Ast, G -- Weiner, A M -- GM31073/GM/NIGMS NIH HHS/ -- New York, N.Y. -- Science. 1996 May 10;272(5263):881-4.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Molecular Biophysics and Biochemistry, Yale University, New Haven, CT 06520-8114, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/8629024" target="_blank"〉PubMed〈/a〉
    Keywords: Base Sequence ; Cell Nucleus/metabolism ; Exons ; Models, Genetic ; Molecular Sequence Data ; Nucleic Acid Conformation ; Oligoribonucleotides/*metabolism ; RNA Precursors/metabolism ; *RNA Splicing ; RNA, Small Nuclear/genetics/*metabolism ; Ribonucleoprotein, U1 Small Nuclear/*metabolism ; Ribonucleoprotein, U4-U6 Small Nuclear/*metabolism ; Ribonucleoprotein, U5 Small Nuclear/*metabolism ; Spliceosomes/metabolism
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  • 76
    Publication Date: 1996-05-31
    Description: A second gene for autosomal dominant polycystic kidney disease was identified by positional cloning. Nonsense mutations in this gene (PKD2) segregated with the disease in three PKD2 families. The predicted 968-amino acid sequence of the PKD2 gene product has six transmembrane spans with intracellular amino- and carboxyl-termini. The PKD2 protein has amino acid similarity with PKD1, the Caenorhabditis elegans homolog of PKD1, and the family of voltage-activated calcium (and sodium) channels, and it contains a potential calcium-binding domain.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Mochizuki, T -- Wu, G -- Hayashi, T -- Xenophontos, S L -- Veldhuisen, B -- Saris, J J -- Reynolds, D M -- Cai, Y -- Gabow, P A -- Pierides, A -- Kimberling, W J -- Breuning, M H -- Deltas, C C -- Peters, D J -- Somlo, S -- DK02015/DK/NIDDK NIH HHS/ -- DK48383/DK/NIDDK NIH HHS/ -- New York, N.Y. -- Science. 1996 May 31;272(5266):1339-42.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Renal Division, Department of Medicine and Molecular Genetics, Albert Einstein College of Medicine, Bronx, NY 10461, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/8650545" target="_blank"〉PubMed〈/a〉
    Keywords: Amino Acid Sequence ; Animals ; Base Sequence ; Caenorhabditis elegans/chemistry/genetics ; Calcium Channels/chemistry/genetics ; Chromosome Mapping ; Chromosomes, Human, Pair 4 ; Cloning, Molecular ; Consensus Sequence ; Crystallography, X-Ray ; Female ; Glycosylation ; Humans ; Male ; Membrane Proteins/chemistry/*genetics/physiology ; Molecular Sequence Data ; Mutation ; Pedigree ; Phenotype ; Polycystic Kidney, Autosomal Dominant/*genetics ; Polymorphism, Single-Stranded Conformational ; Proteins/chemistry/genetics ; Sodium Channels/chemistry/genetics ; TRPP Cation Channels
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  • 77
    Publication Date: 1996-09-20
    Description: Members of a previously unidentified family of potassium channel subunits were cloned from rat and human brain. The messenger RNAs encoding these subunits were widely expressed in brain with distinct yet overlapping patterns, as well as in several peripheral tissues. Expression of the messenger RNAs in Xenopus oocytes resulted in calcium-activated, voltage-independent potassium channels. The channels that formed from the various subunits displayed differential sensitivity to apamin and tubocurare. The distribution, function, and pharmacology of these channels are consistent with the SK class of small-conductance, calcium-activated potassium channels, which contribute to the afterhyperpolarization in central neurons and other cell types.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Kohler, M -- Hirschberg, B -- Bond, C T -- Kinzie, J M -- Marrion, N V -- Maylie, J -- Adelman, J P -- New York, N.Y. -- Science. 1996 Sep 20;273(5282):1709-14.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Vollum Institute, L-474, Oregon Health Sciences University, 3181 Southwest Sam Jackson Road, Portland, OR 97201, USA. J. Maylie, Department of Obstetrics and Gyne.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/8781233" target="_blank"〉PubMed〈/a〉
    Keywords: Amino Acid Sequence ; Animals ; Antisense Elements (Genetics) ; Apamin/pharmacology ; *Brain Chemistry ; Calcium/*metabolism/pharmacology ; Cloning, Molecular ; Electric Conductivity ; Female ; Humans ; Membrane Potentials ; Molecular Sequence Data ; Neurons/*physiology ; Oocytes ; Patch-Clamp Techniques ; Potassium/metabolism ; Potassium Channel Blockers ; Potassium Channels/analysis/chemistry/*physiology ; *Potassium Channels, Calcium-Activated ; RNA, Messenger/analysis/genetics ; Rats ; Rats, Sprague-Dawley ; Small-Conductance Calcium-Activated Potassium Channels ; Xenopus
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  • 78
    Publication Date: 1996-02-09
    Description: Poikilothermic animals respond to chronic cold by increasing phosphoglyceride unsaturation to restore the fluidity of cold-rigidified membranes. Despite the importance of this compensatory response, the enzymes involved have not been clearly identified, and the mechanisms that control their activity are unknown. In carp liver, cold induces an 8- to 10-fold increase in specific activity of the microsomal stearoyl coenzyme A desaturase. Cold-induced up-regulation of gene transcription resulted in a 10-fold increase in desaturase transcript amounts after 48 to 60 hours. However, this increase was preceded by the activation of latent desaturase, probably by a posttranslational mechanism. These two mechanisms may act sequentially to match desaturase expression to the demands imposed by a progressive decrease in temperature.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Tiku, P E -- Gracey, A Y -- Macartney, A I -- Beynon, R J -- Cossins, A R -- New York, N.Y. -- Science. 1996 Feb 9;271(5250):815-8.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Environmental and Evolutionary Biology, University of Liverpool, UK.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/8629000" target="_blank"〉PubMed〈/a〉
    Keywords: Acclimatization ; Amino Acid Sequence ; Animals ; Antisense Elements (Genetics) ; Carps/*metabolism ; Cloning, Molecular ; Cold Temperature ; Enzyme Activation ; Microsomes, Liver/*enzymology ; Molecular Sequence Data ; Protein Processing, Post-Translational ; RNA, Messenger/genetics/metabolism ; Stearoyl-CoA Desaturase/*biosynthesis/genetics/*metabolism ; *Transcription, Genetic ; Up-Regulation
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  • 79
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    American Association for the Advancement of Science (AAAS)
    Publication Date: 1996-01-12
    Description: The digestive vacuole of Plasmodium falciparum is the site of hemoglobin degradation, heme polymerization into crystalline hemozoin, and antimalarial drug accumulation. Antibodies identified histidine-rich protein II (HRP II) in purified digestive vacuoles. Recombinant or native HRP II promoted the formation of hemozoin, and chloroquine inhibited the reaction. The related HRP III also polymerized heme, and an additional HRP was identified in vacuoles. It is proposed that after secretion by the parasite into the host erythrocyte cytosol, HRPs are brought into the acidic digestive vacuole along with hemoglobin. After hemoglobin proteolysis, HRPs bind the liberated heme and mediate hemozoin formation.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Sullivan, D J Jr -- Gluzman, I Y -- Goldberg, D E -- AI-31615/AI/NIAID NIH HHS/ -- New York, N.Y. -- Science. 1996 Jan 12;271(5246):219-22.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Howard Hughes Medical Institute, Department of Medicine, Washington University School of Medicine, St. Louis, MO 63110, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/8539625" target="_blank"〉PubMed〈/a〉
    Keywords: Amino Acid Sequence ; Animals ; Fluorescent Antibody Technique, Indirect ; Heme/metabolism ; Hemeproteins/*biosynthesis ; Hemoglobins/metabolism ; Immunoblotting ; Molecular Sequence Data ; Plasmodium falciparum/*metabolism ; Proteins/chemistry/*metabolism ; Protozoan Proteins/chemistry/*metabolism ; Recombinant Proteins/metabolism ; Vacuoles/metabolism
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  • 80
    Publication Date: 1996-03-29
    Description: In Drosophila, the Wingless and Notch signaling pathways function in m any of the same developmental patterning events. Genetic analysis demonstrates that the dishevelled gene, which encodes a molecule previously implicated in implementation of the Winglass signal, interacts antagonistically with Notch and one of its known ligands, Delta. A direct physical interaction between Dishevelled and the Notch carboxyl terminus, distal to the cdc10/ankyrin repeats, suggests a mechanism for this interaction. It is proposed that Dishevelled, in addition to transducing the Wingless signal, blocks Notch signaling directly, thus providing a molecular mechanism for the inhibitory cross talk observed between these pathways.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Axelrod, J D -- Matsuno, K -- Artavanis-Tsakonas, S -- Perrimon, N -- New York, N.Y. -- Science. 1996 Mar 29;271(5257):1826-32.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Genetics, Harvard Medical School, Boston, MA 02115, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/8596950" target="_blank"〉PubMed〈/a〉
    Keywords: Adaptor Proteins, Signal Transducing ; Amino Acid Sequence ; Animals ; Clone Cells ; Drosophila/genetics/growth & development/*metabolism ; *Drosophila Proteins ; Genes, Insect ; Intracellular Signaling Peptides and Proteins ; Membrane Proteins/antagonists & inhibitors/genetics/*metabolism ; Molecular Sequence Data ; Mutation ; Phenotype ; *Phosphoproteins ; Proteins/genetics/*metabolism ; Proto-Oncogene Proteins/genetics/*metabolism ; Pupa/metabolism ; Receptors, Notch ; *Signal Transduction ; Wings, Animal/cytology/growth & development ; Wnt1 Protein
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  • 81
    Publication Date: 1996-03-29
    Description: Upon contacting its postsynaptic target, a neuronal growth cone transforms into a presynaptic terminal. A membrane component on the growth cone that facilitates synapse formation was identified by means of a complementary DNA-based screen followed by genetic analysis. The late bloomer (lbl) gene in Drosophila encodes a member of the tetraspanin family of cell surface proteins. LBL protein is transiently expressed on motor axons, growth cones, and terminal arbors. In lbl mutant embryos, the growth cone of the RP3 motoneuron contacts its target muscles, but synapse formation is delayed and neighboring motoneurons display an increase in ectopic sprouting.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Kopczynski, C C -- Davis, G W -- Goodman, C S -- New York, N.Y. -- Science. 1996 Mar 29;271(5257):1867-70.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Howard Hughes Medical Institute, University of California, Berkeley 94720, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/8596956" target="_blank"〉PubMed〈/a〉
    Keywords: Amino Acid Sequence ; Animals ; Axons/metabolism/ultrastructure ; Cloning, Molecular ; Drosophila/embryology/genetics/physiology ; *Drosophila Proteins ; *Genes, Insect ; Membrane Proteins/chemistry/genetics/*physiology ; Molecular Sequence Data ; Motor Neurons/cytology/metabolism/*physiology ; Muscles/innervation ; Mutation ; Nerve Tissue Proteins/chemistry/genetics/*physiology ; Neuromuscular Junction/*physiology ; Presynaptic Terminals/*physiology/ultrastructure ; Signal Transduction
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  • 82
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    American Association for the Advancement of Science (AAAS)
    Publication Date: 1996-05-31
    Description: The T cytoplasm of maize serves as a model for the nuclear restoration of cytoplasmic male sterility. The rf2 gene, one of two nuclear genes required for fertility restoration in male-sterile T-cytoplasm (cmsT) maize, was cloned. The protein predicted by the rf2 sequence is a putative aldehyde dehydrogenase, which suggests several mechanisms that might explain Rf2-mediated fertility restoration in cmsT maize. Aldehyde dehydrogenase may be involved in the detoxification of acetaldehyde produced by ethanolic fermentation during pollen development, may play a role in energy metabolism, or may interact with URF13, the mitochondrial protein associated with male sterility in cmsT maize.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Cui, X -- Wise, R P -- Schnable, P S -- New York, N.Y. -- Science. 1996 May 31;272(5266):1334-6.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Zoology and Genetics, Iowa State University, Ames, 50011, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/8650543" target="_blank"〉PubMed〈/a〉
    Keywords: Acetaldehyde/metabolism ; Aldehyde Dehydrogenase/chemistry/*genetics/metabolism ; Alleles ; Amino Acid Sequence ; Cell Nucleus ; Cloning, Molecular ; Crosses, Genetic ; Cytoplasm/genetics/physiology ; Energy Metabolism ; *Genes, Plant ; Intracellular Membranes/metabolism ; Mitochondria/genetics/metabolism ; *Mitochondrial Proteins ; Molecular Sequence Data ; Nuclear Proteins/chemistry/*genetics/metabolism ; Plant Proteins/genetics/metabolism ; Pollen/physiology ; Zea mays/*genetics/*physiology
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  • 83
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    American Association for the Advancement of Science (AAAS)
    Publication Date: 1996-08-23
    Description: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Tollervey, D -- New York, N.Y. -- Science. 1996 Aug 23;273(5278):1056-7.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉European Molecular Biology Laboratory, Heidelberg, Germany.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/8711484" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Base Sequence ; Cell Nucleolus/*metabolism ; Methylation ; Molecular Sequence Data ; RNA Precursors/*metabolism ; RNA, Ribosomal/*metabolism ; RNA, Small Nuclear/*metabolism ; Ribonucleoproteins, Small Nuclear/metabolism
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  • 84
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    American Association for the Advancement of Science (AAAS)
    Publication Date: 1996-04-12
    Description: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Morris, S C -- Cohen, B L -- Gawthrop, A P -- Cavalier-Smith, T -- Winnepenninckx, B -- New York, N.Y. -- Science. 1996 Apr 12;272(5259):282-3.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/8602516" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Biological Evolution ; Bryozoa/*classification/genetics ; DNA, Ribosomal/chemistry ; Invertebrates/*classification/genetics ; Molecular Sequence Data ; *Phylogeny ; RNA, Ribosomal/genetics ; Sequence Analysis, DNA
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  • 85
    Publication Date: 1996-05-24
    Description: The crystal structure of bovine heart cytochrome c oxidase at 2.8 A resolution with an R value of 19.9 percent reveals 13 subunits, each different from the other, five phosphatidyl ethanolamines, three phosphatidyl glycerols and two cholates, two hemes A, and three copper, one magnesium, and one zinc. Of 3606 amino acid residues in the dimer, 3560 have been converged to a reasonable structure by refinement. A hydrogen-bonded system, including a propionate of a heme A (heme a), part of peptide backbone, and an imidazole ligand of CuA, could provide an electron transfer pathway between CuA and heme a. Two possible proton pathways for pumping, each spanning from the matrix to the cytosolic surfaces, were identified, including hydrogen bonds, internal cavities likely to contain water molecules, and structures that could form hydrogen bonds with small possible conformational change of amino acid side chains. Possible channels for chemical protons to produce H2O, for removing the produced water, and for O2, respectively, were identified.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Tsukihara, T -- Aoyama, H -- Yamashita, E -- Tomizaki, T -- Yamaguchi, H -- Shinzawa-Itoh, K -- Nakashima, R -- Yaono, R -- Yoshikawa, S -- New York, N.Y. -- Science. 1996 May 24;272(5265):1136-44.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Institute for Protein Research, Osaka University, Suita, Japan.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/8638158" target="_blank"〉PubMed〈/a〉
    Keywords: Amino Acid Sequence ; Animals ; Cattle ; Cell Nucleus/genetics ; Copper/analysis ; Crystallography, X-Ray ; Electron Transport ; Electron Transport Complex IV/*chemistry/genetics/metabolism ; Heme/analogs & derivatives/analysis ; Hydrogen Bonding ; Iron/analysis ; Membrane Proteins/chemistry ; Mitochondria, Heart/genetics ; Models, Molecular ; Molecular Sequence Data ; Molecular Weight ; Myocardium/enzymology ; Nucleotides/metabolism ; Oxidation-Reduction ; Oxygen/metabolism ; Phospholipids/analysis ; *Protein Conformation ; Protein Structure, Secondary ; Proton Pumps ; Water/metabolism
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  • 86
    Publication Date: 1996-01-19
    Description: About 90 percent of human pancreatic carcinomas show allelic loss at chromosome 18q. To identify candidate tumor suppressor genes on 18q, a panel of pancreatic carcinomas were analyzed for convergent sites of homozygous deletion. Twenty-five of 84 tumors had homozygous deletions at 18q21.1, a site that excludes DCC (a candidate suppressor gene for colorectal cancer) and includes DPC4, a gene similar in sequence to a Drosophila melanogaster gene (Mad) implicated in a transforming growth factor-beta (TGF-beta)-like signaling pathway. Potentially inactivating mutations in DPC4 were identified in six of 27 pancreatic carcinomas that did not have homozygous deletions at 18q21.1. These results identify DPC4 as a candidate tumor suppressor gene whose inactivation may play a role in pancreatic and possibly other human cancers.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Hahn, S A -- Schutte, M -- Hoque, A T -- Moskaluk, C A -- da Costa, L T -- Rozenblum, E -- Weinstein, C L -- Fischer, A -- Yeo, C J -- Hruban, R H -- Kern, S E -- CA62924/CA/NCI NIH HHS/ -- New York, N.Y. -- Science. 1996 Jan 19;271(5247):350-3.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Pathology, 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/8553070" target="_blank"〉PubMed〈/a〉
    Keywords: Alleles ; Amino Acid Sequence ; Animals ; Base Sequence ; Cell Division ; Chromosome Mapping ; *Chromosomes, Human, Pair 18 ; *DNA-Binding Proteins ; Gene Deletion ; Gene Expression ; *Genes, Tumor Suppressor ; Genetic Markers ; Humans ; Mice ; Molecular Sequence Data ; Mutation ; Neoplasm Transplantation ; Pancreatic Neoplasms/*genetics/pathology ; Proteins/chemistry/*genetics/physiology ; Signal Transduction ; Smad4 Protein ; *Trans-Activators ; Transforming Growth Factor beta/physiology ; Transplantation, Heterologous ; Tumor Cells, Cultured
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  • 87
    Publication Date: 1996-03-15
    Description: Cyclins regulate the major cell cycle transitions in eukaryotes through association with cyclin-dependent protein kinases (CDKs). In yeast, G1 cyclins are essential, rate-limiting activators of cell cycle initiation. G1-specific accumulation of one G1 cyclin, Cln2, results from periodic gene expression coupled with rapid protein turnover. Site-directed mutagenesis of CLN2 revealed that its phosphorylation provides a signal that promotes rapid degradation. Cln2 phosphorylation is dependent on the Cdc28 protein kinase, the CDK that it activates. These findings suggest that Cln2 is rendered self-limiting by virtue of its ability to activate its cognate CDK subunit.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Lanker, S -- Valdivieso, M H -- Wittenberg, C -- GM43487/GM/NIGMS NIH HHS/ -- New York, N.Y. -- Science. 1996 Mar 15;271(5255):1597-601.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Molecular Biology, Scripps Research Institute, La Jolla, CA 92037, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/8599119" target="_blank"〉PubMed〈/a〉
    Keywords: Amino Acid Sequence ; CDC28 Protein Kinase, S cerevisiae/*metabolism ; Cyclins/genetics/*metabolism ; Enzyme Activation ; Fungal Proteins/genetics/metabolism ; *G1 Phase ; Molecular Sequence Data ; Mutagenesis, Site-Directed ; Mutation ; Phenotype ; Phosphorylation ; Saccharomyces cerevisiae/cytology/metabolism ; Saccharomyces cerevisiae Proteins
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  • 88
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    American Association for the Advancement of Science (AAAS)
    Publication Date: 1996-05-17
    Description: Replication fork pause (RFP) sites transiently arresting replication fork movement were mapped to transfer RNA (tRNA) genes of Saccharomyces cerevisiae in vivo. RFP sites are polar, stalling replication forks only when they oppose the direction of tRNA transcription. Mutant tRNA genes defective in assembly of transcription initiation complexes and a temperature-sensitive RNA polymerase III mutant (rpc160-41) defective in initiation of transcription do not stall replication forks, suggesting that transcription is required for RFP activity.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Deshpande, A M -- Newlon, C S -- GM35679/GM/NIGMS NIH HHS/ -- New York, N.Y. -- Science. 1996 May 17;272(5264):1030-3.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Micobiology and Molecular Genetics, UMDNJ Medical School and UMDNJ-Graduate School of Biomedical Sciences, Newark, NJ 07103, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/8638128" target="_blank"〉PubMed〈/a〉
    Keywords: Base Sequence ; Cloning, Molecular ; *DNA Replication ; Genes, Fungal ; Molecular Sequence Data ; Point Mutation ; RNA Polymerase III/metabolism ; RNA, Fungal/*genetics ; RNA, Transfer/*genetics ; Repetitive Sequences, Nucleic Acid ; Replication Origin ; Saccharomyces cerevisiae/genetics/*metabolism ; Sequence Deletion ; Temperature ; Transcription Factors/metabolism ; *Transcription, Genetic
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  • 89
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    American Association for the Advancement of Science (AAAS)
    Publication Date: 1996-03-22
    Description: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Mount, S M -- New York, N.Y. -- Science. 1996 Mar 22;271(5256):1690-2.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Zoology, University of Maryland, College Park 20742-4415, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/8596928" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Base Composition ; Base Sequence ; Consensus Sequence ; Humans ; *Introns ; Molecular Sequence Data ; Mutation ; RNA Precursors/*genetics/metabolism ; *RNA Splicing ; RNA, Small Nuclear/metabolism ; Spliceosomes/metabolism
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  • 90
    Publication Date: 1996-04-26
    Description: Hox genes regulate patterning during limb development. It is believed that they function in the determination of the timing and extent of local growth rates. Here, it is demonstrated that synpolydactyly, an inherited human abnormality of the hands and feet, is caused by expansions of a polyalanine stretch in the amino-terminal region of HOXD13. The homozygous phenotype includes the transformation of metacarpal and metatarsal bones to short carpal- and tarsal-like bones. The mutations identify the polyalanine stretch outside of the DNA binding domain of HOXD13 as a region necessary for proper protein function.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Muragaki, Y -- Mundlos, S -- Upton, J -- Olsen, B R -- AR36819/AR/NIAMS NIH HHS/ -- AR36820/AR/NIAMS NIH HHS/ -- New York, N.Y. -- Science. 1996 Apr 26;272(5261):548-51.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Cell Biology, Harvard Medical School, Boston, MA 02115, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/8614804" target="_blank"〉PubMed〈/a〉
    Keywords: Amino Acid Sequence ; Base Sequence ; Chromosome Mapping ; Chromosomes, Human, Pair 2 ; Cloning, Molecular ; Female ; Fingers/*abnormalities/embryology ; *Genes, Homeobox ; Genetic Linkage ; Homeodomain Proteins/chemistry/*genetics/physiology ; Humans ; Male ; Molecular Sequence Data ; Morphogenesis ; Multigene Family ; Mutation ; Pedigree ; Peptides/chemistry ; Polydactyly/embryology/*genetics/radiography ; Polymerase Chain Reaction ; Syndactyly/embryology/*genetics/radiography ; Toes/*abnormalities/embryology ; *Transcription Factors
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    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
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  • 91
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    American Association for the Advancement of Science (AAAS)
    Publication Date: 1996-03-15
    Description: In the first step of V(D)J recombination, the RAG1 and RAG2 proteins cleave DNA between a signal sequence and the adjacent coding sequence, generating a blunt signal end and a coding end with a closed hairpin structure. These hairpins are intermediates leading to the formation of assembled antigen receptor genes. It is shown here that the hairpins are formed by a chemical mechanism of direct trans-esterification, very similar to the early steps of transpositional recombination and retroviral integration. A minor variation in the reaction is sufficient to divert the process from transposition to hairpin formation.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉van Gent, D C -- Mizuuchi, K -- Gellert, M -- New York, N.Y. -- Science. 1996 Mar 15;271(5255):1592-4.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Laboratory of Molecular Biology, National Institute of Diabetes and Digestive and Kidney Diseases, National Institutes of Health, Bethesda, MD 20892-0540, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/8599117" target="_blank"〉PubMed〈/a〉
    Keywords: Base Sequence ; DNA/chemistry/metabolism ; DNA Nucleotidyltransferases/metabolism ; DNA Transposable Elements ; *DNA-Binding Proteins ; Esterification ; *Gene Rearrangement ; *Gene Rearrangement, T-Lymphocyte ; Genes, Immunoglobulin ; HIV/*genetics ; *Homeodomain Proteins ; Integrases ; Molecular Sequence Data ; Nucleic Acid Conformation ; Proteins/metabolism ; Recombinases ; *Recombination, Genetic ; Thionucleotides/metabolism ; VDJ Recombinases ; *Virus Integration
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  • 92
    Publication Date: 1996-06-28
    Description: Homozygous weaver mice are profoundly ataxic because of the loss of granule cell neurons during cerebellar development. This granule cell loss appears to be caused by a genetic defect in the pore region (Gly156--〉Ser) of the heterotrimeric guanine nucleotide-binding protein (G protein)-gated inwardly rectifying potassium (K+) channel subunit (GIRK2). A related subunit, GIRK1, associates with GIRK2 to constitute a neuronal G protein-gated inward rectifier K+ channel. The weaver allele of the GIRK2 subunit (wvGIRK2) caused loss of K+ selectivity when expressed either as wvGIRK2 homomultimers or as GIRK1-wvGIRK2 heteromultimers. The mutation also let to loss of sensitivity to G protein betagamma dimers. Expression of wvGIRK2 subunits let to increased cell death, presumably as a result of basal nonselective channel opening.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Navarro, B -- Kennedy, M E -- Velimirovic, B -- Bhat, D -- Peterson, A S -- Clapham, D E -- New York, N.Y. -- Science. 1996 Jun 28;272(5270):1950-3.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Pharmacology, Mayo Foundation, Rochester, Minnesota 55905, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/8658170" target="_blank"〉PubMed〈/a〉
    Keywords: Amino Acid Sequence ; Animals ; Antisense Elements (Genetics) ; CHO Cells ; Cell Death ; Cell Line ; Cerebellum/cytology/*metabolism ; Cricetinae ; G Protein-Coupled Inwardly-Rectifying Potassium Channels ; GTP-Binding Proteins/*physiology ; Membrane Potentials ; Mice ; Mice, Neurologic Mutants ; Molecular Sequence Data ; Neurons/cytology/metabolism ; Oocytes/cytology ; Patch-Clamp Techniques ; Point Mutation ; Potassium Channels/genetics/*metabolism ; *Potassium Channels, Inwardly Rectifying ; Transfection
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  • 93
    Publication Date: 1996-11-01
    Description: The relative organization of genes and repetitive DNAs in complex eukaryotic genomes is not well understood. Diagnostic sequencing indicated that a 280-kilobase region containing the maize Adh1-F and u22 genes is composed primarily of retrotransposons inserted within each other. Ten retroelement families were discovered, with reiteration frequencies ranging from 10 to 30,000 copies per haploid genome. These retrotransposons accounted for more than 60 percent of the Adh1-F region and at least 50 percent of the nuclear DNA of maize. These elements were largely intact and are dispersed throughout the gene-containing regions of the maize genome.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉SanMiguel, P -- Tikhonov, A -- Jin, Y K -- Motchoulskaia, N -- Zakharov, D -- Melake-Berhan, A -- Springer, P S -- Edwards, K J -- Lee, M -- Avramova, Z -- Bennetzen, J L -- New York, N.Y. -- Science. 1996 Nov 1;274(5288):765-8.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Biological Sciences, Purdue University, West Lafayette, IN 47907, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/8864112" target="_blank"〉PubMed〈/a〉
    Keywords: Chromosomes, Artificial, Yeast ; DNA, Plant/genetics ; Genes, Plant ; *Genome, Plant ; Molecular Sequence Data ; Repetitive Sequences, Nucleic Acid ; *Retroelements ; Zea mays/*genetics
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  • 94
    Publication Date: 1996-01-19
    Description: Mutants of the Saccharomyces cerevisiae ataxia telangiectasia mutated (ATM) homolog MEC1/SAD3/ESR1 were identified that could live only if the RAD53/SAD1 checkpoint kinase was overproduced. MEC1 and a structurally related gene, TEL1, have overlapping functions in response to DNA damage and replication blocks that in mutants can be provided by overproduction of RAD53. Both MEC1 and TEL1 were found to control phosphorylation of Rad53p in response to DNA damage. These results indicate that RAD53 is a signal transducer in the DNA damage and replication checkpoint pathways and functions downstream of two members of the ATM lipid kinase family. Because several members of this pathway are conserved among eukaryotes, it is likely that a RAD53-related kinase will function downstream of the human ATM gene product and play an important role in the mammalian response to DNA damage.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Sanchez, Y -- Desany, B A -- Jones, W J -- Liu, Q -- Wang, B -- Elledge, S J -- DK07696/DK/NIDDK NIH HHS/ -- GM44664/GM/NIGMS NIH HHS/ -- New York, N.Y. -- Science. 1996 Jan 19;271(5247):357-60.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Verna and Mars McLean Department of Biochemistry, Department of Molecular and Human Genetics, Howard Hughes Medical Institute, Baylor College of Medicine, Houston, TX 77030, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/8553072" target="_blank"〉PubMed〈/a〉
    Keywords: Ataxia Telangiectasia Mutated Proteins ; Base Sequence ; *Cell Cycle ; *Cell Cycle Proteins ; Checkpoint Kinase 2 ; *DNA Damage ; DNA Replication ; DNA-Binding Proteins ; Fungal Proteins/*genetics/metabolism ; Gene Expression Regulation, Fungal ; *Genes, Fungal ; Intracellular Signaling Peptides and Proteins ; Molecular Sequence Data ; Mutation ; Phosphorylation ; Protein Kinases/*genetics/metabolism ; *Protein-Serine-Threonine Kinases ; Proteins/genetics/metabolism ; Saccharomyces cerevisiae/cytology/*genetics/metabolism ; *Saccharomyces cerevisiae Proteins ; Signal Transduction ; Tumor Suppressor Proteins
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  • 95
    Publication Date: 1996-05-10
    Description: The development of the thymus depends initially on epithelial-mesenchymal and subsequently on reciprocal lympho-stromal interactions. The genetic steps governing development and differentiation of the thymic microenvironment are unknown. With the use of a targeted disruption of the whn gene, which recapitulates the phenotype of the athymic nude mouse, the WHN transcription factor was shown to be the product of the nude locus. Formation of the thymic epithelial primordium before the entry of lymphocyte progenitors did not require the activity of WHN. However, subsequent differentiation of primitive precursor cells into subcapsular, cortical, and medullary epithelial cells of the postnatal thymus did depend on activity of the whn gene. These results define the first genetically separable steps during thymic epithelial differentiation.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Nehls, M -- Kyewski, B -- Messerle, M -- Waldschutz, R -- Schuddekopf, K -- Smith, A J -- Boehm, T -- New York, N.Y. -- Science. 1996 May 10;272(5263):886-9.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Deutsches Krebsforschungszentrum, Im Neuenheimer Feld, Heidelberg, Germany.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/8629026" target="_blank"〉PubMed〈/a〉
    Keywords: Alleles ; Animals ; Animals, Newborn ; Base Sequence ; Cell Differentiation/*genetics ; Crosses, Genetic ; DNA-Binding Proteins/*genetics/physiology ; Epithelial Cells ; Female ; Forkhead Transcription Factors ; Gene Expression Regulation, Developmental ; Gene Targeting ; Genetic Complementation Test ; Male ; Mice ; Mice, Nude ; Molecular Sequence Data ; T-Lymphocytes/*cytology ; Thymus Gland/*cytology/embryology/metabolism ; Transcription Factors/*genetics/physiology
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  • 96
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    American Association for the Advancement of Science (AAAS)
    Publication Date: 1996-04-05
    Description: The nuclear import factor p10 was cloned from Saccharomyces cerevisiae and found to be essential. The protein p10 can bind directly to several peptide repeat-containing nucleoporins. It also binds to the guanosine triphosphatase (GTPase) Ran in its guanosine diphosphate (GDP)-bound form and to karyopherin beta. Assembly of the karyopherin heterodimer on immobilized nucleoporin yielded cooperative binding of p10 and Ran-GDP. Addition of GTP to this pentameric complex led to dissociation of karyopherin (chi, presumably via in situ formation of Ran-GTP from Ran-GDP. Thus, p10 appears to coordinate the Ran-dependent association and dissociation reactions underlying nuclear import.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Nehrbass, U -- Blobel, G -- New York, N.Y. -- Science. 1996 Apr 5;272(5258):120-2.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Laboratory of Cell Biology, Howard Hughes Medical Institute, Rockefeller University, New York 10021, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/8600522" target="_blank"〉PubMed〈/a〉
    Keywords: Biological Transport, Active ; Carrier Proteins/genetics/*metabolism ; Cell Nucleus/*metabolism ; Cloning, Molecular ; GTP-Binding Proteins/metabolism ; Guanosine Diphosphate/metabolism ; Guanosine Triphosphate/metabolism ; Molecular Sequence Data ; Nuclear Envelope/metabolism ; Nuclear Proteins/*metabolism ; *Nucleocytoplasmic Transport Proteins ; Saccharomyces cerevisiae/genetics/*metabolism ; Saccharomyces cerevisiae Proteins ; alpha Karyopherins ; beta Karyopherins ; ran GTP-Binding Protein
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  • 97
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    American Association for the Advancement of Science (AAAS)
    Publication Date: 1996-01-26
    Description: Two apoptosis-linked genes, named ALG-2 and ALG-3, were identified by means of a functional selection strategy. ALG-2 codes for a Ca(2+)-binding protein required for T cell receptor-, Fas-, and glucocorticoid-induced cell death. ALG-3, a partial complementary DNA that is homologous to the familial Alzheimer's disease gene STM2, rescues a T cell hybridoma from T cell receptor- and Fas-induced apoptosis. These findings suggest that ALG-2 may mediate Ca(2+)-regulated signals along the death pathway and that cell death may play a role in Alzheimer's disease.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Vito, P -- Lacana, E -- D'Adamio, L -- New York, N.Y. -- Science. 1996 Jan 26;271(5248):521-5.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉T Cell Molecular Biology Unit, National Institute of Allergy and Infectious Diseases, National Institutes of Health, Bethesda, MD 20892, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/8560270" target="_blank"〉PubMed〈/a〉
    Keywords: Alkaloids/pharmacology ; Alzheimer Disease/*genetics ; Amino Acid Sequence ; Animals ; Antigens, CD95/metabolism ; *Apoptosis/drug effects ; Apoptosis Regulatory Proteins ; Calcium/metabolism ; Calcium-Binding Proteins/chemistry/genetics/*physiology ; Cell Line ; Cloning, Molecular ; DNA, Complementary ; Dactinomycin/pharmacology ; Dexamethasone/pharmacology ; Fas Ligand Protein ; Hybridomas ; Interleukin-2/metabolism ; Membrane Glycoproteins/metabolism ; Membrane Proteins/chemistry/genetics/*physiology ; Mice ; Molecular Sequence Data ; Presenilin-2 ; Receptors, Antigen, T-Cell/physiology ; Signal Transduction ; Staurosporine ; T-Lymphocytes ; Transfection ; Up-Regulation
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    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
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  • 98
    Publication Date: 1996-09-13
    Description: The solution structure of a human immunodeficiency virus type-1 (HIV-1) Rev peptide bound to stem-loop IIB of the Rev response element (RRE) RNA was solved by nuclear magnetic resonance spectroscopy. The Rev peptide has an alpha-helical conformation and binds in the major groove of the RNA near a purine-rich internal loop. Several arginine side chains make base-specific contacts, and an asparagine residue contacts a G.A base pair. The phosphate backbone adjacent to a G.G base pair adopts an unusual structure that allows the peptide to access a widened major groove. The structure formed by the two purine-purine base pairs of the RRE creates a distinctive binding pocket that the peptide can use for specific recognition.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Battiste, J L -- Mao, H -- Rao, N S -- Tan, R -- Muhandiram, D R -- Kay, L E -- Frankel, A D -- Williamson, J R -- GM-08344/GM/NIGMS NIH HHS/ -- GM-39589/GM/NIGMS NIH HHS/ -- GM-53320/GM/NIGMS NIH HHS/ -- New York, N.Y. -- Science. 1996 Sep 13;273(5281):1547-51.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Chemistry, 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/8703216" target="_blank"〉PubMed〈/a〉
    Keywords: Amino Acid Sequence ; Arginine/chemistry ; Asparagine/chemistry ; Base Composition ; Base Sequence ; *DNA-Binding Proteins ; Fungal Proteins/chemistry ; Gene Products, rev/*chemistry/*metabolism ; *Genes, env ; HIV-1/*chemistry ; Hydrogen Bonding ; Magnetic Resonance Spectroscopy ; Models, Molecular ; Molecular Sequence Data ; *Nucleic Acid Conformation ; Protein Kinases/chemistry ; *Protein Structure, Secondary ; RNA, Viral/*chemistry/genetics/metabolism ; *Saccharomyces cerevisiae Proteins ; Threonine/chemistry ; rev Gene Products, Human Immunodeficiency Virus
    Print ISSN: 0036-8075
    Electronic ISSN: 1095-9203
    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
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  • 99
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    American Association for the Advancement of Science (AAAS)
    Publication Date: 1996-06-14
    Description: The REV3 and REV7 genes of the yeast Saccharomyces cerevisiae are required for DNA damage-induced mutagenesis. The Rev3 and Rev7 proteins were shown to form a complex with DNA polymerase activity. This polymerase replicated past a thymine-thymine cis-syn cyclobutane dimer, a lesion that normally severely inhibits replication, with an efficiency of approximately 10 percent. In contrast, bypass replication efficiency with yeast DNA polymerase alpha was no more than 1 percent. The Rev3-Rev7 complex is the sixth eukaryotic DNA polymerase to be described, and is therefore called DNA polymerase zeta.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Nelson, J R -- Lawrence, C W -- Hinkle, D C -- GM21858/GM/NIGMS NIH HHS/ -- GM29686/GM/NIGMS NIH HHS/ -- New York, N.Y. -- Science. 1996 Jun 14;272(5268):1646-9.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Biophysics, School of Medicine and Dentistry, University of Rochester Medical Center, New York 14642, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/8658138" target="_blank"〉PubMed〈/a〉
    Keywords: Base Sequence ; DNA Primers ; *DNA Replication ; DNA, Fungal/biosynthesis/metabolism ; DNA-Directed DNA Polymerase/genetics/*metabolism ; Fungal Proteins/antagonists & inhibitors/genetics/*metabolism ; Glutathione Transferase/genetics/metabolism ; Molecular Sequence Data ; Nucleic Acid Synthesis Inhibitors ; Pyrimidine Dimers/*metabolism ; Recombinant Fusion Proteins/genetics/metabolism ; Saccharomyces cerevisiae/enzymology/*genetics ; *Saccharomyces cerevisiae Proteins
    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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  • 100
    Publication Date: 1996-07-19
    Description: Vaccination with naked DNA elicits cellular and humoral immune responses that have a T helper cell type 1 bias. However, plasmid vectors expressing large amounts of gene product do not necessarily induce immune responses to the encoded antigens. Instead, the immunogenicity of plasmid DNA (pDNA) requires short immunostimulatory DNA sequences (ISS) that contain a CpG dinucleotide in a particular base context. Human monocytes transfected with pDNA or double-stranded oligonucleotides containing the ISS, but not those transfected with ISS-deficient pDNA or oligonucleotides, transcribed large amounts of interferon-alpha, interferon-beta, and interleukin-12. Although ISS are necessary for gene vaccination, they down-regulate gene expression and thus may interfere with gene replacement therapy by inducing proinflammatory cytokines.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Sato, Y -- Roman, M -- Tighe, H -- Lee, D -- Corr, M -- Nguyen, M D -- Silverman, G J -- Lotz, M -- Carson, D A -- Raz, E -- AI36214/AI/NIAID NIH HHS/ -- AI37305/AI/NIAID NIH HHS/ -- AR41897/AR/NIAMS NIH HHS/ -- etc. -- New York, N.Y. -- Science. 1996 Jul 19;273(5273):352-4.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Medicine and The Sam and Rose Stein Institute for Research on Aging, University of California, San Diego, 9500 Gilman Drive, La Jolla, CA 92093-0663, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/8662521" target="_blank"〉PubMed〈/a〉
    Keywords: Amino Acid Sequence ; Ampicillin Resistance/*genetics ; Animals ; *Antibody Formation ; Base Sequence ; CpG Islands ; Cytokines/*biosynthesis ; DNA/chemistry/genetics/*immunology ; Female ; Gene Expression Regulation ; Genetic Vectors ; Humans ; Injections, Intradermal ; Interferons/biosynthesis ; Interleukin-12/biosynthesis ; Mice ; Mice, Inbred BALB C ; Molecular Sequence Data ; Monocytes/immunology ; Plasmids/genetics/*immunology ; Th1 Cells/immunology ; Transfection ; *Vaccination ; beta-Galactosidase/*immunology
    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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