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  • Amino Acid Sequence  (1,471)
  • Mice  (1,425)
  • American Association for the Advancement of Science (AAAS)  (2,641)
  • American Institute of Physics (AIP)
  • Oxford University Press
  • 1995-1999  (1,401)
  • 1990-1994  (1,240)
Collection
Keywords
Publisher
  • American Association for the Advancement of Science (AAAS)  (2,641)
  • American Institute of Physics (AIP)
  • Oxford University Press
  • Springer  (25)
  • Wiley-Blackwell  (4)
Years
Year
  • 1
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    Evolution of a protein fold in vitro (1999)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1999-04-09
    Description: A "switch" mutant of the Arc repressor homodimer was constructed by interchanging the sequence positions of a hydrophobic core residue, leucine 12, and an adjacent surface polar residue, asparagine 11, in each strand of an intersubunit beta sheet. The mutant protein adopts a fold in which each beta strand is replaced by a right-handed helix and side chains in this region undergo significant repacking. The observed structural changes allow the protein to maintain solvent exposure of polar side chains and optimal burial of hydrophobic side chains. These results suggest that new protein folds can evolve from existing folds without drastic or large-scale mutagenesis.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Cordes, M H -- Walsh, N P -- McKnight, C J -- Sauer, R T -- AI-15706/AI/NIAID NIH HHS/ -- New York, N.Y. -- Science. 1999 Apr 9;284(5412):325-8.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Biology, Massachusetts Institute of Technology, Cambridge, MA 02139, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/10195898" target="_blank"〉PubMed〈/a〉
    Keywords: Amino Acid Sequence ; Amino Acid Substitution ; Asparagine/chemistry ; Circular Dichroism ; Hydrogen Bonding ; Leucine/chemistry ; Models, Molecular ; Molecular Sequence Data ; Mutagenesis, Insertional ; Nuclear Magnetic Resonance, Biomolecular ; Protein Conformation ; *Protein Folding ; *Protein Structure, Secondary ; Protein Structure, Tertiary ; Repressor Proteins/*chemistry ; Viral Proteins/*chemistry ; Viral Regulatory and Accessory 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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  • 2
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    Crystal structure of invasin: a bacterial integrin-binding protein (1999)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1999-10-09
    Description: The Yersinia pseudotuberculosis invasin protein promotes bacterial entry by binding to host cell integrins with higher affinity than natural substrates such as fibronectin. The 2.3 angstrom crystal structure of the invasin extracellular region reveals five domains that form a 180 angstrom rod with structural similarities to tandem fibronectin type III domains. The integrin-binding surfaces of invasin and fibronectin include similarly located key residues, but in the context of different folds and surface shapes. The structures of invasin and fibronectin provide an example of convergent evolution, in which invasin presents an optimized surface for integrin binding, in comparison with host substrates.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Hamburger, Z A -- Brown, M S -- Isberg, R R -- Bjorkman, P J -- New York, N.Y. -- Science. 1999 Oct 8;286(5438):291-5.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Division of Biology 156-29, Howard Hughes Medical Institute, California Institute of Technology, Pasadena, CA 91125, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/10514372" target="_blank"〉PubMed〈/a〉
    Keywords: *Adhesins, Bacterial ; Amino Acid Sequence ; Bacterial Proteins/*chemistry/metabolism ; Binding Sites ; Crystallography, X-Ray ; Evolution, Molecular ; Fibronectins/chemistry/metabolism ; Hydrogen Bonding ; Integrins/*metabolism ; Ligands ; Models, Molecular ; Protein Binding ; Protein Conformation ; Protein Folding ; Protein Structure, Secondary ; Yersinia pseudotuberculosis/*chemistry/metabolism
    Print ISSN: 0036-8075
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    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
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  • 3
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    Affinity-driven peptide selection of an NFAT inhibitor more selective than cyclosporin A (1999)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1999-09-25
    Description: The flow of information from calcium-mobilizing receptors to nuclear factor of activated T cells (NFAT)-dependent genes is critically dependent on interaction between the phosphatase calcineurin and the transcription factor NFAT. A high-affinity calcineurin-binding peptide was selected from combinatorial peptide libraries based on the calcineurin docking motif of NFAT. This peptide potently inhibited NFAT activation and NFAT-dependent expression of endogenous cytokine genes in T cells, without affecting the expression of other cytokines that require calcineurin but not NFAT. Substitution of the optimized peptide sequence into the natural calcineurin docking site increased the calcineurin responsiveness of NFAT. Compounds that interfere selectively with the calcineurin-NFAT interaction without affecting calcineurin phosphatase activity may be useful as therapeutic agents that are less toxic than current drugs.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Aramburu, J -- Yaffe, M B -- Lopez-Rodriguez, C -- Cantley, L C -- Hogan, P G -- Rao, A -- R01 AI 40127/AI/NIAID NIH HHS/ -- R01 GM056203/GM/NIGMS NIH HHS/ -- R01 HL 03601/HL/NHLBI NIH HHS/ -- R43 AI 43726/AI/NIAID NIH HHS/ -- etc. -- New York, N.Y. -- Science. 1999 Sep 24;285(5436):2129-33.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Pathology, Harvard Medical School, Boston, MA 02115, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/10497131" target="_blank"〉PubMed〈/a〉
    Keywords: Amino Acid Sequence ; Binding Sites ; Calcineurin/*metabolism ; Calcineurin Inhibitors ; Cell Nucleus/metabolism ; Cyclosporine/pharmacology ; Cytokines/biosynthesis/genetics ; DNA-Binding Proteins/*antagonists & inhibitors/chemistry/metabolism ; Gene Expression Regulation ; Genes, Reporter ; HeLa Cells ; Humans ; Immunosuppressive Agents/chemistry/metabolism/*pharmacology ; Jurkat Cells ; Molecular Sequence Data ; NFATC Transcription Factors ; *Nuclear Proteins ; Oligopeptides/chemistry/metabolism/*pharmacology ; Peptide Library ; Peptides/chemistry/metabolism/*pharmacology ; Phosphorylation ; Recombinant Fusion Proteins/metabolism ; T-Lymphocytes/*drug effects/immunology ; Transcription Factors/*antagonists & inhibitors/chemistry/metabolism ; Transfection
    Print ISSN: 0036-8075
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    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
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  • 4
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    From mice to maize (1999)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1999-01-23
    Description: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Lawler, C -- Erbisch, F -- New York, N.Y. -- Science. 1999 Jan 1;283(5398):33-4.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/9917260" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; *Biotechnology ; Mice ; Mice, Transgenic ; *Patents as Topic ; Plants, Genetically Modified/*genetics ; United States
    Print ISSN: 0036-8075
    Electronic ISSN: 1095-9203
    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
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  • 5
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    New model for hereditary breast cancer (1999)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1999-05-21
    Description: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Hagmann, M -- New York, N.Y. -- Science. 1999 Apr 30;284(5415):723, 725.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/10336390" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Apoptosis ; Breast Neoplasms/*genetics/pathology ; *Disease Models, Animal ; Female ; *Genes, BRCA1 ; Genes, p53 ; Humans ; Mammary Glands, Animal/pathology ; Mammary Neoplasms, Animal/*genetics/pathology ; Mice ; Mice, Knockout ; Mice, Transgenic ; Mutation
    Print ISSN: 0036-8075
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    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
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  • 6
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    Stem cells. Rat spinal cord function partially restored (1999)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1999-12-28
    Description: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Wickelgren, I -- New York, N.Y. -- Science. 1999 Dec 3;286(5446):1826-7.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/10610569" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Astrocytes/cytology ; Cell Differentiation ; Cell Survival ; Embryo, Mammalian ; Mice ; Neurons/cytology ; Oligodendroglia/cytology ; Rats ; Spinal Cord/cytology/*physiology ; Spinal Cord Injuries/*therapy ; *Stem Cell Transplantation ; Stem Cells/cytology
    Print ISSN: 0036-8075
    Electronic ISSN: 1095-9203
    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
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  • 7
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    Requirement of ATM-dependent phosphorylation of brca1 in the DNA damage response to double-strand breaks (1999)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1999-11-05
    Description: The Brca1 (breast cancer gene 1) tumor suppressor protein is phosphorylated in response to DNA damage. Results from this study indicate that the checkpoint protein kinase ATM (mutated in ataxia telangiectasia) was required for phosphorylation of Brca1 in response to ionizing radiation. ATM resides in a complex with Brca1 and phosphorylated Brca1 in vivo and in vitro in a region that contains clusters of serine-glutamine residues. Phosphorylation of this domain appears to be functionally important because a mutated Brca1 protein lacking two phosphorylation sites failed to rescue the radiation hypersensitivity of a Brca1-deficient cell line. Thus, phosphorylation of Brca1 by the checkpoint kinase ATM may be critical for proper responses to DNA double-strand breaks and may provide a molecular explanation for the role of ATM in breast cancer.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Cortez, D -- Wang, Y -- Qin, J -- Elledge, S J -- GM44664/GM/NIGMS NIH HHS/ -- New York, N.Y. -- Science. 1999 Nov 5;286(5442):1162-6.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Verna and Mars McLean Department of Biochemistry and Molecular Biology, Howard Hughes Medical Institute, Department of Cell Biology, 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/10550055" target="_blank"〉PubMed〈/a〉
    Keywords: Amino Acid Sequence ; Ataxia Telangiectasia/genetics ; Ataxia Telangiectasia Mutated Proteins ; BRCA1 Protein/*metabolism ; Breast Neoplasms/genetics ; Cell Cycle Proteins ; Cell Line ; *DNA Damage ; *DNA Repair ; DNA, Complementary ; DNA-Binding Proteins ; Female ; Gamma Rays ; Genes, BRCA1 ; Genetic Predisposition to Disease ; HeLa Cells ; Heterozygote ; Humans ; Molecular Sequence Data ; Mutation ; Phosphorylation ; Protein-Serine-Threonine Kinases/genetics/*metabolism ; Recombinant Fusion Proteins/metabolism ; Tumor Suppressor Proteins
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  • 8
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    Regulation of intestinal alpha-defensin activation by the metalloproteinase matrilysin in innate host defense (1999)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1999-10-03
    Description: Precursors of alpha-defensin peptides require activation for bactericidal activity. In mouse small intestine, matrilysin colocalized with alpha-defensins (cryptdins) in Paneth cell granules, and in vitro it cleaved the pro segment from cryptdin precursors. Matrilysin-deficient (MAT-/-) mice lacked mature cryptdins and accumulated precursor molecules. Intestinal peptide preparations from MAT-/- mice had decreased antimicrobial activity. Orally administered bacteria survived in greater numbers and were more virulent in MAT-/- mice than in MAT+/+ mice. Thus, matrilysin functions in intestinal mucosal defense by regulating the activity of defensins, which may be a common role for this metalloproteinase in its numerous epithelial sites of expression.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Wilson, C L -- Ouellette, A J -- Satchell, D P -- Ayabe, T -- Lopez-Boado, Y S -- Stratman, J L -- Hultgren, S J -- Matrisian, L M -- Parks, W C -- New York, N.Y. -- Science. 1999 Oct 1;286(5437):113-7.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Pediatrics, Division of Allergy and Pulmonary Medicine, Washington University School of Medicine, St. Louis, MO 63110, USA. wilson_c@kids.wustl.edu〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/10506557" target="_blank"〉PubMed〈/a〉
    Keywords: Amino Acid Sequence ; Animals ; Catalysis ; Cytoplasmic Granules/enzymology ; Escherichia coli/growth & development ; Escherichia coli Infections/immunology/microbiology ; Female ; Humans ; *Immunity, Innate ; *Immunity, Mucosal ; Intestinal Mucosa/enzymology/immunology/microbiology ; Intestine, Small/enzymology/*immunology/microbiology ; Male ; Matrix Metalloproteinase 7 ; Metalloendopeptidases/genetics/*metabolism ; Mice ; Molecular Sequence Data ; Paneth Cells/enzymology ; Protein Precursors/genetics/*metabolism ; Recombinant Fusion Proteins/metabolism ; Salmonella typhimurium/growth & development/pathogenicity ; Tissue Extracts/pharmacology
    Print ISSN: 0036-8075
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  • 9
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    Microtubule disassembly by ATP-dependent oligomerization of the AAA enzyme katanin (1999)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1999-10-26
    Description: Katanin, a member of the AAA adenosine triphosphatase (ATPase) superfamily, uses nucleotide hydrolysis energy to sever and disassemble microtubules. Many AAA enzymes disassemble stable protein-protein complexes, but their mechanisms are not well understood. A fluorescence resonance energy transfer assay demonstrated that the p60 subunit of katanin oligomerized in an adenosine triphosphate (ATP)- and microtubule-dependent manner. Oligomerization increased the affinity of katanin for microtubules and stimulated its ATPase activity. After hydrolysis of ATP, microtubule-bound katanin oligomers disassembled microtubules and then dissociated into free katanin monomers. Coupling a nucleotide-dependent oligomerization cycle to the disassembly of a target protein complex may be a general feature of ATP-hydrolyzing AAA domains.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Hartman, J J -- Vale, R D -- New York, N.Y. -- Science. 1999 Oct 22;286(5440):782-5.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉The Howard Hughes Medical Institute and the Department of Cellular and Molecular Pharmacology, University of California, San Francisco, CA 94143, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/10531065" target="_blank"〉PubMed〈/a〉
    Keywords: Adenosine Triphosphatases/*chemistry/*metabolism ; Adenosine Triphosphate/analogs & derivatives/*metabolism ; Amino Acid Sequence ; Centrifugation, Density Gradient ; Fluorescence ; Hydrolysis ; Luminescent Proteins ; Microtubules/*metabolism ; Models, Biological ; Molecular Sequence Data ; Polymers ; Recombinant Fusion Proteins/chemistry/metabolism ; Tubulin/metabolism
    Print ISSN: 0036-8075
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  • 10
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    Perspectives: protein structure. Class-conscious TCR? (1999)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1999-12-28
    Description: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Wilson, I A -- New York, N.Y. -- Science. 1999 Dec 3;286(5446):1867-8.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Molecular Biology and Skaggs Institute for Chemical Biology, The Scripps Research Institute, La Jolla, CA 92037, USA. wilson@scripps.edu〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/10610577" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Antigens/*chemistry/immunology/metabolism ; Binding Sites ; CD4-Positive T-Lymphocytes/immunology/metabolism ; CD8-Positive T-Lymphocytes/immunology/metabolism ; Crystallography, X-Ray ; Histocompatibility Antigens Class I/chemistry/immunology/metabolism ; Histocompatibility Antigens Class II/*chemistry/immunology/metabolism ; Mice ; Models, Molecular ; Peptides/chemistry/immunology/metabolism ; Protein Binding ; Protein Conformation ; Protein Structure, Secondary ; Receptors, Antigen, T-Cell, alpha-beta/*chemistry/immunology/metabolism
    Print ISSN: 0036-8075
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  • 11
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    Control of early viral and bacterial distribution and disease by natural antibodies (1999)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1999-12-11
    Description: Natural antibodies are often dismissed from immunological analysis as "background," but they may play an important role in conferring immunity against infections. In antibody-free mice infected with various viruses or with Listeria monocytogenes, viral or bacterial titers in peripheral organs, including the kidney and brain, were 10 to 100 times greater than in antibody-competent mice (and enhanced their susceptibility to some infections), and titers in secondary lymphoid organs were 10 to 100 times lower than in antibody-competent mice. Thus, natural antibodies play a crucial role by preventing pathogen dissemination to vital organs and by improving immunogenicity through enhanced antigen-trapping in secondary lymphoid organs.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Ochsenbein, A F -- Fehr, T -- Lutz, C -- Suter, M -- Brombacher, F -- Hengartner, H -- Zinkernagel, R M -- New York, N.Y. -- Science. 1999 Dec 10;286(5447):2156-9.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Institute for Experimental Immunology, University Hospital Zurich, Schmelzbergstrasse 12, 8091 Zurich, Switzerland.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/10591647" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Antibodies, Bacterial/blood/immunology ; Antibodies, Viral/blood/immunology ; Bacterial Infections/*immunology/microbiology ; Germ-Free Life ; *Immunity, Innate ; Immunoglobulin M/blood/*immunology ; Kidney/microbiology/virology ; Listeria monocytogenes/immunology/physiology ; Listeriosis/immunology ; Lymphocytic choriomeningitis virus/immunology/physiology ; Lymphoid Tissue/immunology/microbiology/virology ; Mice ; Mice, Inbred C57BL ; Neutralization Tests ; Rhabdoviridae Infections/immunology/virology ; Specific Pathogen-Free Organisms ; Spleen/microbiology/virology ; Vaccinia virus/immunology/physiology ; Vesicular stomatitis Indiana virus/immunology/physiology ; Virus Diseases/*immunology/virology ; Virus Replication
    Print ISSN: 0036-8075
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  • 12
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    A tobacco syntaxin with a role in hormonal control of guard cell ion channels (1999)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1999-01-23
    Description: The plant hormone abscisic acid (ABA) regulates potassium and chloride ion channels at the plasma membrane of guard cells, leading to stomatal closure that reduces transpirational water loss from the leaf. The tobacco Nt-SYR1 gene encodes a syntaxin that is associated with the plasma membrane. Syntaxins and related SNARE proteins aid intracellular vesicle trafficking, fusion, and secretion. Disrupting Nt-Syr1 function by cleavage with Clostridium botulinum type C toxin or competition with a soluble fragment of Nt-Syr1 prevents potassium and chloride ion channel response to ABA in guard cells and implicates Nt-Syr1 in an ABA-signaling cascade.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Leyman, B -- Geelen, D -- Quintero, F J -- Blatt, M R -- New York, N.Y. -- Science. 1999 Jan 22;283(5401):537-40.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Laboratory of Plant Physiology and Biophysics, University of London, Wye College, Wye, Kent TN25 5AH, UK.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/9915701" target="_blank"〉PubMed〈/a〉
    Keywords: Abscisic Acid/*pharmacology ; Amino Acid Sequence ; Animals ; Botulinum Toxins/metabolism ; Cell Membrane/physiology ; Chloride Channels/*physiology ; Genes, Plant ; Genetic Complementation Test ; Ion Channel Gating/drug effects ; Membrane Proteins/chemistry/genetics/*physiology ; Molecular Sequence Data ; Oocytes ; Patch-Clamp Techniques ; Plant Growth Regulators/*pharmacology ; Plant Leaves/*physiology ; *Plants, Toxic ; Potassium Channels/*physiology ; Qa-SNARE Proteins ; Saccharomyces cerevisiae/genetics/growth & development ; Signal Transduction ; Tobacco/genetics/*physiology ; Xenopus
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  • 13
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    Congenital nephrotic syndrome in mice lacking CD2-associated protein (1999)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1999-10-09
    Description: CD2-associated protein (CD2AP) is an 80-kilodalton protein that is critical for stabilizing contacts between T cells and antigen-presenting cells. In CD2AP-deficient mice, immune function was compromised, but the mice died at 6 to 7 weeks of age from renal failure. In the kidney, CD2AP was expressed primarily in glomerular epithelial cells. Knockout mice exhibited defects in epithelial cell foot processes, accompanied by mesangial cell hyperplasia and extracellular matrix deposition. Supporting a role for CD2AP in the specialized cell junction known as the slit diaphragm, CD2AP associated with nephrin, the primary component of the slit diaphragm.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Shih, N Y -- Li, J -- Karpitskii, V -- Nguyen, A -- Dustin, M L -- Kanagawa, O -- Miner, J H -- Shaw, A S -- New York, N.Y. -- Science. 1999 Oct 8;286(5438):312-5.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Center for Immunology and Department of Pathology, Washington University, Saint Louis, MO 63110, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/10514378" target="_blank"〉PubMed〈/a〉
    Keywords: Adaptor Proteins, Signal Transducing ; Animals ; Basement Membrane/ultrastructure ; Cytoskeletal Proteins ; Epithelial Cells/metabolism/ultrastructure ; Extracellular Matrix Proteins/metabolism ; Glomerular Mesangium/metabolism/ultrastructure ; Intercellular Junctions/metabolism/ultrastructure ; Kidney Glomerulus/blood supply/*metabolism/*ultrastructure ; Lymphocyte Activation ; Membrane Proteins ; Mice ; Mice, Knockout ; Microscopy, Electron ; Nephrotic Syndrome/*congenital/genetics/metabolism/pathology ; Proteins/genetics/*metabolism ; Recombinant Fusion Proteins/metabolism ; T-Lymphocytes/immunology
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  • 14
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    Calmodulin dependence of presynaptic metabotropic glutamate receptor signaling (1999)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1999-11-05
    Description: Glutamatergic neurotransmission is controlled by presynaptic metabotropic glutamate receptors (mGluRs). A subdomain in the intracellular carboxyl-terminal tail of group III mGluRs binds calmodulin and heterotrimeric guanosine triphosphate-binding protein (G protein) betagamma subunits in a mutually exclusive manner. Mutations interfering with calmodulin binding and calmodulin antagonists inhibit G protein-mediated modulation of ionic currents by mGluR 7. Calmodulin antagonists also prevent inhibition of excitatory neurotransmission via presynaptic mGluRs. These results reveal a novel mechanism of presynaptic modulation in which Ca(2+)-calmodulin is required to release G protein betagamma subunits from the C-tail of group III mGluRs in order to mediate glutamatergic autoinhibition.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉O'Connor, V -- El Far, O -- Bofill-Cardona, E -- Nanoff, C -- Freissmuth, M -- Karschin, A -- Airas, J M -- Betz, H -- Boehm, S -- New York, N.Y. -- Science. 1999 Nov 5;286(5442):1180-4.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Neurochemistry, Max Planck Institute for Brain Research, Deutschordenstrasse 46, 60528 Frankfurt, Germany.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/10550060" target="_blank"〉PubMed〈/a〉
    Keywords: Amino Acid Sequence ; Animals ; Calcium/metabolism ; Calmodulin/antagonists & inhibitors/*metabolism ; Cells, Cultured ; Dimerization ; G Protein-Coupled Inwardly-Rectifying Potassium Channels ; GTP-Binding Proteins/*metabolism ; Glutamic Acid/*metabolism ; Hippocampus/cytology/metabolism ; Humans ; Mice ; Molecular Sequence Data ; Neurons/metabolism ; Potassium Channels/metabolism ; *Potassium Channels, Inwardly Rectifying ; Presynaptic Terminals/metabolism ; Propionates/pharmacology ; Rats ; Rats, Sprague-Dawley ; Receptors, Metabotropic Glutamate/antagonists & inhibitors/*metabolism ; Recombinant Fusion Proteins/metabolism ; Sesterterpenes ; Signal Transduction ; Swine ; *Synaptic Transmission ; Terpenes/pharmacology
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    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
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  • 15
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    Chlamydia infections and heart disease linked through antigenic mimicry (1999)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1999-02-26
    Description: Chlamydia infections are epidemiologically linked to human heart disease. A peptide from the murine heart muscle-specific alpha myosin heavy chain that has sequence homology to the 60-kilodalton cysteine-rich outer membrane proteins of Chlamydia pneumoniae, C. psittaci, and C. trachomatis was shown to induce autoimmune inflammatory heart disease in mice. Injection of the homologous Chlamydia peptides into mice also induced perivascular inflammation, fibrotic changes, and blood vessel occlusion in the heart, as well as triggering T and B cell reactivity to the homologous endogenous heart muscle-specific peptide. Chlamydia DNA functioned as an adjuvant in the triggering of peptide-induced inflammatory heart disease. Infection with C. trachomatis led to the production of autoantibodies to heart muscle-specific epitopes. Thus, Chlamydia-mediated heart disease is induced by antigenic mimicry of a heart muscle-specific protein.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Bachmaier, K -- Neu, N -- de la Maza, L M -- Pal, S -- Hessel, A -- Penninger, J M -- New York, N.Y. -- Science. 1999 Feb 26;283(5406):1335-9.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Amgen Institute, Ontario Cancer Institute, Departments of Medical Biophysics and Immunology, University of Toronto, Toronto, Ontario M5G 2C1, Canada.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/10037605" target="_blank"〉PubMed〈/a〉
    Keywords: Adoptive Transfer ; Amino Acid Sequence ; Animals ; Antigens, Bacterial/chemistry/immunology ; Autoantibodies/biosynthesis ; Autoimmune Diseases/immunology/*microbiology/pathology ; B-Lymphocytes/immunology ; Bacterial Outer Membrane Proteins/chemistry/*immunology ; CD4-Positive T-Lymphocytes/immunology ; Chlamydia/*immunology ; Chlamydia Infections/complications/*immunology ; Chlamydia trachomatis/immunology ; CpG Islands ; Humans ; Immunization ; Lymphocyte Activation ; Mice ; Mice, Inbred BALB C ; *Molecular Mimicry ; Molecular Sequence Data ; Myocarditis/immunology/*microbiology/pathology ; Myocardium/immunology/pathology ; Myosin Heavy Chains/chemistry/*immunology ; Oligodeoxyribonucleotides/immunology ; Sequence Homology, Amino Acid
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  • 16
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    Defective angiogenesis in mice lacking endoglin (1999)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1999-05-29
    Description: Endoglin is a transforming growth factor-beta (TGF-beta) binding protein expressed on the surface of endothelial cells. Loss-of-function mutations in the human endoglin gene ENG cause hereditary hemorrhagic telangiectasia (HHT1), a disease characterized by vascular malformations. Here it is shown that by gestational day 11.5, mice lacking endoglin die from defective vascular development. However, in contrast to mice lacking TGF-beta, vasculogenesis was unaffected. Loss of endoglin caused poor vascular smooth muscle development and arrested endothelial remodeling. These results demonstrate that endoglin is essential for angiogenesis and suggest a pathogenic mechanism for HHT1.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Li, D Y -- Sorensen, L K -- Brooke, B S -- Urness, L D -- Davis, E C -- Taylor, D G -- Boak, B B -- Wendel, D P -- K08 HL03490-03/HL/NHLBI NIH HHS/ -- T35 HL07744-06/HL/NHLBI NIH HHS/ -- New York, N.Y. -- Science. 1999 May 28;284(5419):1534-7.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Program in Human Molecular Biology and Genetics, Department of Human Genetics, Howard Hughes Medical Institute, University of Utah, Salt Lake City, UT 84112-5330, USA. dean.li@hci.utah.edu〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/10348742" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Antigens, CD ; Antigens, CD31/analysis ; Blood Vessels/cytology/*embryology/metabolism ; Cell Differentiation ; Crosses, Genetic ; Endothelium, Vascular/cytology/*embryology/metabolism ; Female ; Gene Targeting ; In Situ Hybridization ; Male ; Mice ; Mice, Inbred C57BL ; Microscopy, Electron ; Muscle, Smooth, Vascular/cytology/*embryology ; *Neovascularization, Physiologic ; Receptors, Cell Surface ; Signal Transduction ; Transforming Growth Factor beta/metabolism ; Vascular Cell Adhesion Molecule-1/genetics/*physiology ; Yolk Sac/ultrastructure
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    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
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  • 17
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    Prevention of graft versus host disease by inactivation of host antigen-presenting cells (1999)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1999-07-20
    Description: Graft versus host disease, an alloimmune attack on host tissues mounted by donor T cells, is the most important toxicity of allogeneic bone marrow transplantation. The mechanism by which allogeneic T cells are initially stimulated is unknown. In a murine allogeneic bone marrow transplantation model it was found that, despite the presence of numerous donor antigen-presenting cells, only host-derived antigen-presenting cells initiated graft versus host disease. Thus, strategies for preventing graft versus host disease could be developed that are based on inactivating host antigen-presenting cells. Such strategies could expand the safety and application of allogeneic bone marrow transplantation in treatment of common genetic and neoplastic diseases.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Shlomchik, W D -- Couzens, M S -- Tang, C B -- McNiff, J -- Robert, M E -- Liu, J -- Shlomchik, M J -- Emerson, S G -- P50HL-54516/HL/NHLBI NIH HHS/ -- New York, N.Y. -- Science. 1999 Jul 16;285(5426):412-5.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Medicine, University of Pennsylvania School of Medicine, Philadelphia, PA 19104, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/10411505" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Antigen-Presenting Cells/*immunology ; Bone Marrow Transplantation/adverse effects/*immunology ; CD8-Positive T-Lymphocytes/*immunology ; Dendritic Cells/immunology ; Graft vs Host Disease/immunology/*prevention & control ; H-2 Antigens/immunology ; Lymph Nodes/immunology ; Mice ; Mice, Inbred C3H ; Mice, Inbred C57BL ; Mice, Inbred Strains ; Mice, Knockout ; Minor Histocompatibility Antigens/immunology ; Spleen/immunology ; Transplantation Chimera
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    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
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  • 18
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    Regulation of maternal behavior and offspring growth by paternally expressed Peg3 (1999)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1999-04-09
    Description: Imprinted genes display parent-of-origin-dependent monoallelic expression that apparently regulates complex mammalian traits, including growth and behavior. The Peg3 gene is expressed in embryos and the adult brain from the paternal allele only. A mutation in the Peg3 gene resulted in growth retardation, as well as a striking impairment of maternal behavior that frequently resulted in death of the offspring. This result may be partly due to defective neuronal connectivity, as well as reduced oxytocin neurons in the hypothalamus, because mutant mothers were deficient in milk ejection. This study provides further insights on the evolution of epigenetic regulation of imprinted gene dosage in modulating mammalian growth and behavior.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Li, L -- Keverne, E B -- Aparicio, S A -- Ishino, F -- Barton, S C -- Surani, M A -- Wellcome Trust/United Kingdom -- New York, N.Y. -- Science. 1999 Apr 9;284(5412):330-3.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Wellcome CRC Institute of Cancer and Developmental Biology, and Physiological Laboratory, University of Cambridge, Tennis Court Road, Cambridge CB2 1QR, UK.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/10195900" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Animals, Newborn ; Brain/metabolism ; Crosses, Genetic ; Female ; Gene Expression ; Gene Targeting ; *Genomic Imprinting ; *Growth ; Hypothalamus/cytology/metabolism ; Kruppel-Like Transcription Factors ; Lactation ; Male ; *Maternal Behavior ; Mice ; Mutation ; Neural Pathways ; Neurons/metabolism ; Oxytocin/metabolism ; Phenotype ; *Protein Kinases ; Proteins/genetics/*physiology ; *Transcription Factors ; *Weight Gain
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  • 19
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    A processive single-headed motor: kinesin superfamily protein KIF1A (1999)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1999-02-19
    Description: A single kinesin molecule can move "processively" along a microtubule for more than 1 micrometer before detaching from it. The prevailing explanation for this processive movement is the "walking model," which envisions that each of two motor domains (heads) of the kinesin molecule binds coordinately to the microtubule. This implies that each kinesin molecule must have two heads to "walk" and that a single-headed kinesin could not move processively. Here, a motor-domain construct of KIF1A, a single-headed kinesin superfamily protein, was shown to move processively along the microtubule for more than 1 micrometer. The movement along the microtubules was stochastic and fitted a biased Brownian-movement model.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Okada, Y -- Hirokawa, N -- New York, N.Y. -- Science. 1999 Feb 19;283(5405):1152-7.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Cell Biology and Anatomy, Graduate School of Medicine, University of Tokyo, Hongo, Tokyo 113-0033, Japan.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/10024239" target="_blank"〉PubMed〈/a〉
    Keywords: Adenosine Triphosphate/metabolism ; Amino Acid Sequence ; Animals ; Catalytic Domain ; Diffusion ; Drosophila ; Kinesin/chemistry/*metabolism ; Kinetics ; Microscopy, Fluorescence ; Microtubules/*metabolism ; Models, Chemical ; Molecular Motor Proteins/chemistry/*metabolism ; Molecular Sequence Data ; Nerve Tissue Proteins/chemistry/*metabolism ; Recombinant Fusion Proteins ; Stochastic Processes ; Thermodynamics
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    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
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  • 20
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    A role for DNA-PK in retroviral DNA integration (1999)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1999-04-24
    Description: Retroviral DNA integration is catalyzed by the viral protein integrase. Here, it is shown that DNA-dependent protein kinase (DNA-PK), a host cell protein, also participates in the reaction. DNA-PK-deficient murine scid cells infected with three different retroviruses showed a substantial reduction in retroviral DNA integration and died by apoptosis. Scid cell killing was not observed after infection with an integrase-defective virus, suggesting that abortive integration is the trigger for death in these DNA repair-deficient cells. These results suggest that the initial events in retroviral integration are detected as DNA damage by the host cell and that completion of the integration process requires the DNA-PK-mediated repair pathway.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Daniel, R -- Katz, R A -- Skalka, A M -- AI40721/AI/NIAID NIH HHS/ -- AI40835/AI/NIAID NIH HHS/ -- CA71515/CA/NCI NIH HHS/ -- etc. -- New York, N.Y. -- Science. 1999 Apr 23;284(5414):644-7.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Institute for Cancer Research, Fox Chase Cancer Center, 7701 Burholme Avenue, Philadelphia, PA 19111, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/10213687" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Apoptosis ; CHO Cells ; Cell Survival ; Cells, Cultured ; Cricetinae ; DNA Damage ; *DNA Repair ; DNA, Viral/*genetics/metabolism ; DNA-Activated Protein Kinase ; *DNA-Binding Proteins ; Genetic Vectors ; HIV-1/genetics ; Integrases/genetics/metabolism ; Mice ; Mutation ; Protein-Serine-Threonine Kinases/*metabolism ; Retroviridae/*genetics/physiology ; *Virus Integration ; Virus Replication
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  • 21
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    An activating immunoreceptor complex formed by NKG2D and DAP10 (1999)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1999-07-31
    Description: Many immune receptors are composed of separate ligand-binding and signal-transducing subunits. In natural killer (NK) and T cells, DAP10 was identified as a cell surface adaptor protein in an activating receptor complex with NKG2D, a receptor for the stress-inducible and tumor-associated major histocompatibility complex molecule MICA. Within the DAP10 cytoplasmic domain, an Src homology 2 (SH2) domain-binding site was capable of recruiting the p85 subunit of the phosphatidylinositol 3-kinase (PI 3-kinase), providing for NKG2D-dependent signal transduction. Thus, NKG2D-DAP10 receptor complexes may activate NK and T cell responses against MICA-bearing tumors.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Wu, J -- Song, Y -- Bakker, A B -- Bauer, S -- Spies, T -- Lanier, L L -- Phillips, J H -- AI30581/AI/NIAID NIH HHS/ -- New York, N.Y. -- Science. 1999 Jul 30;285(5428):730-2.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉DNAX Research Institute, 901 California Avenue, Palo Alto, CA 94304, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/10426994" target="_blank"〉PubMed〈/a〉
    Keywords: Amino Acid Sequence ; Animals ; Binding Sites ; Cell Line ; Cytotoxicity, Immunologic ; Humans ; Killer Cells, Natural/*immunology/metabolism ; Ligands ; *Lymphocyte Activation ; Membrane Proteins/chemistry/genetics/*metabolism ; Mice ; Molecular Sequence Data ; NK Cell Lectin-Like Receptor Subfamily K ; Neoplasms/immunology ; Phosphatidylinositol 3-Kinases/metabolism ; Phosphorylation ; Phosphotyrosine/metabolism ; Receptors, Immunologic/chemistry/genetics/*metabolism ; Receptors, Natural Killer Cell ; Signal Transduction ; T-Lymphocytes/*immunology/metabolism ; Tumor Cells, Cultured ; src Homology Domains
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  • 22
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    Positive selection of natural autoreactive B cells (1999)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1999-07-03
    Description: Lymphocyte development is critically influenced by self-antigens. T cells are subject to both positive and negative selection, depending on their degree of self-reactivity. Although B cells are subject to negative selection, it has been difficult to test whether self-antigen plays any positive role in B cell development. A murine model system of naturally generated autoreactive B cells with a germ line gene-encoded specificity for the Thy-1 (CD90) glycoprotein was developed, in which the presence of self-antigen promotes B cell accumulation and serum autoantibody secretion. Thus, B cells can be subject to positive selection, generated, and maintained on the basis of their autoreactivity.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Hayakawa, K -- Asano, M -- Shinton, S A -- Gui, M -- Allman, D -- Stewart, C L -- Silver, J -- Hardy, R R -- New York, N.Y. -- Science. 1999 Jul 2;285(5424):113-6.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Institute for Cancer Research, Fox Chase Cancer Center, 7701 Burholme Avenue, Philadelphia, PA 19111, USA. K_Hayakawa@fccc.edu〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/10390361" target="_blank"〉PubMed〈/a〉
    Keywords: Aging/immunology ; Animals ; Antigens, CD5/analysis ; Antigens, Thy-1/*immunology ; Autoantibodies/*biosynthesis/blood/immunology ; Autoantigens/*immunology ; B-Lymphocyte Subsets/*immunology ; Genes, Immunoglobulin ; Hybridomas ; Immunity, Innate ; Immunologic Surveillance ; Mice ; Mice, SCID ; Mice, Transgenic ; Receptors, Antigen, B-Cell/immunology ; Signal Transduction ; T-Lymphocytes/immunology
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    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
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  • 23
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    Severe liver degeneration in mice lacking the IkappaB kinase 2 gene (1999)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1999-04-09
    Description: Phosphorylation of inhibitor of kappa B (IkappaB) proteins is an important step in the activation of the transcription nuclear factor kappa B (NF-kappaB) and requires two IkappaB kinases, IKK1 (IKKalpha) and IKK2 (IKKbeta). Mice that are devoid of the IKK2 gene had extensive liver damage from apoptosis and died as embryos, but these mice could be rescued by the inactivation of the gene encoding tumor necrosis factor receptor 1. Mouse embryonic fibroblast cells that were isolated from IKK2-/- embryos showed a marked reduction in tumor necrosis factor-alpha (TNF-alpha)- and interleukin-1alpha-induced NF-kappaB activity and an enhanced apoptosis in response to TNF-alpha. IKK1 associated with NF-kappaB essential modulator (IKKgamma/IKKAP1), another component of the IKK complex. These results show that IKK2 is essential for mouse development and cannot be substituted with IKK1.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Li, Q -- Van Antwerp, D -- Mercurio, F -- Lee, K F -- Verma, I M -- New York, N.Y. -- Science. 1999 Apr 9;284(5412):321-5.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Salk Institute, La Jolla, CA 92037, USA. Signal Pharmaceuticals, San Diego, CA 92121, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/10195897" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Apoptosis ; Cell Line ; DNA-Binding Proteins/metabolism ; Embryonic and Fetal Development ; Gene Targeting ; I-kappa B Kinase ; I-kappa B Proteins ; Interleukin-1/pharmacology ; Liver/cytology/*embryology ; Mice ; NF-kappa B/metabolism ; Phosphorylation ; Polymerase Chain Reaction ; Protein-Serine-Threonine Kinases/genetics/*metabolism ; Receptors, Tumor Necrosis Factor/genetics/metabolism ; Recombinant Fusion Proteins/metabolism ; Sequence Deletion ; Signal Transduction ; Transcription Factor RelA ; Transcription Factors/metabolism ; Tumor Necrosis Factor-alpha/pharmacology
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  • 24
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    Linear differentiation of cytotoxic effectors into memory T lymphocytes (1999)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1999-03-12
    Description: A central question in immunology is the origin of long-lived T cell memory that confers protection against recurrent infection. The differentiation of naive T cell receptor transgenic CD8+ cells into effector cytotoxic T lymphocytes (CTLs) and memory CD8+ cells was studied. Memory CD8+ cells that were generated after strong antigenic stimulation were the progeny of cytotoxic effectors and retained antigen-specific cytolytic activity 10 weeks after adoptive transfer to antigen-free recipient mice. Thus, potential vaccines based on CTL memory will require the differentiation of naive cells into post-effector memory T cells.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Opferman, J T -- Ober, B T -- Ashton-Rickardt, P G -- 5T32 AI07090/AI/NIAID NIH HHS/ -- New York, N.Y. -- Science. 1999 Mar 12;283(5408):1745-8.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Committee on Immunology, Department of Pathology, Committee on Developmental Biology, The University of Chicago, Gwen Knapp Center for Lupus and Immunology Research, Chicago, IL 60637, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/10073942" target="_blank"〉PubMed〈/a〉
    Keywords: Adoptive Transfer ; Animals ; Apoptosis ; CD8-Positive T-Lymphocytes/*cytology/*immunology ; Cell Differentiation ; Cell Division ; Cell Lineage ; Cells, Cultured ; Cytotoxicity, Immunologic ; Dose-Response Relationship, Immunologic ; H-Y Antigen/immunology ; *Immunologic Memory ; Lymphocyte Activation ; Membrane Glycoproteins/metabolism ; Mice ; Mice, Transgenic ; Perforin ; Pore Forming Cytotoxic Proteins ; T-Lymphocyte Subsets/cytology/*immunology ; T-Lymphocytes, Cytotoxic/cytology/*immunology
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  • 25
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    Cell surgery (1999)
    American Association for the Advancement of Science (AAAS)
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    Publication Date: 1999-12-28
    Description: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Sikorski, R -- Peters, R -- New York, N.Y. -- Science. 1999 Nov 19;286(5444):1498.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/10610553" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Bone Marrow Cells/*cytology ; Cell Differentiation ; Cell Separation ; Dystrophin/biosynthesis ; Female ; *Hematopoietic Stem Cell Transplantation ; Male ; Mice ; Mice, Inbred C57BL ; Mice, Inbred mdx ; Muscle, Skeletal/*cytology/metabolism ; *Stem Cell Transplantation ; Stem Cells/*cytology
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  • 26
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    Antiangiogenic activity of the cleaved conformation of the serpin antithrombin (1999)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1999-09-18
    Description: Antithrombin, a member of the serpin family, functions as an inhibitor of thrombin and other enzymes. Cleavage of the carboxyl-terminal loop of antithrombin induces a conformational change in the molecule. Here it is shown that the cleaved conformation of antithrombin has potent antiangiogenic and antitumor activity in mouse models. The latent form of intact antithrombin, which is similar in conformation to the cleaved molecule, also inhibited angiogenesis and tumor growth. These data provide further evidence that the clotting and fibrinolytic pathways are directly involved in the regulation of angiogenesis.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉O'Reilly, M S -- Pirie-Shepherd, S -- Lane, W S -- Folkman, J -- P01-CA45548/CA/NCI NIH HHS/ -- R01-CA64481/CA/NCI NIH HHS/ -- New York, N.Y. -- Science. 1999 Sep 17;285(5435):1926-8.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Surgery, Children's Hospital, Departments of Surgery and Cellular Biology, Harvard Microchemistry Facility, 16 Divinity Avenue, Cambridge, MA 02138, USA. oreilly@hub.tch.harvard.edu〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/10489375" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Antineoplastic Agents/chemistry/isolation & purification/metabolism/*pharmacology ; Antithrombins/chemistry/isolation & purification/metabolism/*pharmacology ; Carcinoma, Small Cell/blood supply/drug therapy ; Cell Line ; Culture Media, Conditioned ; Drug Screening Assays, Antitumor ; Humans ; Lung Neoplasms/blood supply/drug therapy ; Mice ; Mice, SCID ; Neoplasm Transplantation ; Neovascularization, Pathologic/*drug therapy ; Peptide Fragments/chemistry/metabolism/pharmacology ; Protein Conformation ; Tumor Cells, Cultured
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    Complex grabbing (1999)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1999-10-09
    Description: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Sikorski, R -- Peters, R -- New York, N.Y. -- Science. 1999 Sep 17;285(5435):1868.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/10515792" target="_blank"〉PubMed〈/a〉
    Keywords: Amino Acid Sequence ; *Genetic Techniques ; Protein Binding ; Proteins/*isolation & purification/metabolism ; Recombinant Fusion Proteins/metabolism ; Ribonucleoproteins, Small Nuclear/metabolism ; Saccharomyces cerevisiae ; Sequence Analysis/*methods
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    The Pex16p homolog SSE1 and storage organelle formation in Arabidopsis seeds (1999)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1999-04-09
    Description: Mature Arabidopsis seeds are enriched in storage proteins and lipids, but lack starch. In the shrunken seed 1 (sse1) mutant, however, starch is favored over proteins and lipids as the major storage compound. SSE1 has 26 percent identity with Pex16p in Yarrowia lipolytica and complements pex16 mutants defective in the formation of peroxisomes and the transportation of plasma membrane- and cell wall-associated proteins. In Arabidopsis maturing seeds, SSE1 is required for protein and oil body biogenesis, both of which are endoplasmic reticulum-dependent. Starch accumulation in sse1 suggests that starch formation is a default storage deposition pathway.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Lin, Y -- Sun, L -- Nguyen, L V -- Rachubinski, R A -- Goodman, H M -- New York, N.Y. -- Science. 1999 Apr 9;284(5412):328-30.〈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/10195899" target="_blank"〉PubMed〈/a〉
    Keywords: Amino Acid Sequence ; Arabidopsis/genetics/*metabolism/ultrastructure ; *Arabidopsis Proteins ; *Fungal Proteins ; Gene Expression ; Genetic Complementation Test ; Membrane Proteins/chemistry/genetics ; Microbodies/metabolism/ultrastructure ; Microscopy, Electron ; Molecular Sequence Data ; Mutation ; Organelles/*metabolism/ultrastructure ; Phenotype ; Plant Oils/metabolism ; Plant Proteins/chemistry/genetics/metabolism/*physiology ; Reverse Transcriptase Polymerase Chain Reaction ; Saccharomycetales/chemistry/genetics/metabolism ; Seeds/*metabolism/ultrastructure ; Starch/metabolism
    Print ISSN: 0036-8075
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    Pigment epithelium-derived factor: a potent inhibitor of angiogenesis (1999)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1999-07-10
    Description: In the absence of disease, the vasculature of the mammalian eye is quiescent, in part because of the action of angiogenic inhibitors that prevent vessels from invading the cornea and vitreous. Here, an inhibitor responsible for the avascularity of these ocular compartments is identified as pigment epithelium-derived factor (PEDF), a protein previously shown to have neurotrophic activity. The amount of inhibitory PEDF produced by retinal cells was positively correlated with oxygen concentrations, suggesting that its loss plays a permissive role in ischemia-driven retinal neovascularization. These results suggest that PEDF may be of therapeutic use, especially in retinopathies where pathological neovascularization compromises vision and leads to blindness.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Dawson, D W -- Volpert, O V -- Gillis, P -- Crawford, S E -- Xu, H -- Benedict, W -- Bouck, N P -- New York, N.Y. -- Science. 1999 Jul 9;285(5425):245-8.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Microbiology-Immunology, Department of Pathology, Robert H. Lurie Comprehensive Cancer Center, Northwestern University Medical School, Chicago, IL 60611, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/10398599" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Animals, Newborn ; Antibodies/immunology ; Cattle ; Cells, Cultured ; Chemotaxis/drug effects ; Culture Media, Conditioned ; Endothelial Growth Factors/metabolism ; Endothelium, Vascular/cytology/drug effects/physiology ; Eye/blood supply ; *Eye Proteins ; Humans ; Lymphokines/metabolism ; Mice ; Neovascularization, Pathologic/*drug therapy/metabolism/pathology ; Neovascularization, Physiologic/*drug effects ; *Nerve Growth Factors ; Oxygen/physiology ; Proteins/genetics/immunology/*pharmacology/*physiology ; RNA, Messenger/genetics/metabolism ; Rats ; Retina/*metabolism/pathology ; Retinal Neovascularization/*drug therapy ; Retinal Vessels/growth & development ; Serpins/genetics/immunology/*pharmacology/*physiology ; Tumor Cells, Cultured ; Vascular Endothelial Growth Factor A ; Vascular Endothelial Growth Factors
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    Plant paralog to viral movement protein that potentiates transport of mRNA into the phloem (1999)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1999-01-05
    Description: CmPP16 from Cucurbita maxima was cloned and the protein was shown to possess properties similar to those of viral movement proteins. CmPP16 messenger RNA (mRNA) is present in phloem tissue, whereas protein appears confined to sieve elements (SE). Microinjection and grafting studies revealed that CmPP16 moves from cell to cell, mediates the transport of sense and antisense RNA, and moves together with its mRNA into the SE of scion tissue. CmPP16 possesses the characteristics that are likely required to mediate RNA delivery into the long-distance translocation stream. Thus, RNA may move within the phloem as a component of a plant information superhighway.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Xoconostle-Cazares, B -- Xiang, Y -- Ruiz-Medrano, R -- Wang, H L -- Monzer, J -- Yoo, B C -- McFarland, K C -- Franceschi, V R -- Lucas, W J -- New York, N.Y. -- Science. 1999 Jan 1;283(5398):94-8.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Section of Plant Biology, Division of Biological Sciences, University of California, Davis, CA 95616, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/9872750" target="_blank"〉PubMed〈/a〉
    Keywords: Amino Acid Sequence ; Biological Transport ; Cloning, Molecular ; Cucumis sativus ; Cucurbitaceae/genetics/*metabolism ; Microinjections ; Molecular Sequence Data ; Plant Leaves/metabolism ; Plant Proteins/chemistry/genetics/*metabolism ; Plant Roots/metabolism ; Plant Stems/metabolism ; Plant Viral Movement Proteins ; RNA, Antisense/metabolism ; RNA, Messenger/*metabolism ; RNA, Plant/*metabolism ; Reverse Transcriptase Polymerase Chain Reaction ; Signal Transduction ; Viral Proteins/chemistry/metabolism
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    An essential role for DNA adenine methylation in bacterial virulence (1999)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1999-05-13
    Description: Salmonella typhimurium lacking DNA adenine methylase (Dam) were fully proficient in colonization of mucosal sites but showed severe defects in colonization of deeper tissue sites. These Dam- mutants were totally avirulent and were effective as live vaccines against murine typhoid fever. Dam regulated the expression of at least 20 genes known to be induced during infection; a subset of these genes are among those activated by the PhoP global virulence regulator. PhoP, in turn, affected Dam methylation at specific genomic sites, as evidenced by alterations in DNA methylation patterns. Dam inhibitors are likely to have broad antimicrobial action, and Dam- derivatives of these pathogens may serve as live attenuated vaccines.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Heithoff, D M -- Sinsheimer, R L -- Low, D A -- Mahan, M J -- AI23348/AI/NIAID NIH HHS/ -- AI36373/AI/NIAID NIH HHS/ -- New York, N.Y. -- Science. 1999 May 7;284(5416):967-70.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Molecular, Cellular, and Developmental Biology, University of California, Santa Barbara, CA 93106, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/10320378" target="_blank"〉PubMed〈/a〉
    Keywords: Adenine/metabolism ; Animals ; Bacterial Proteins/metabolism ; *Bacterial Vaccines ; *DNA Methylation ; DNA, Bacterial/metabolism ; Gene Expression Regulation, Bacterial ; Genes, Bacterial ; Lethal Dose 50 ; Methylation ; Mice ; Mice, Inbred BALB C ; Mutation ; Peyer's Patches/microbiology ; Salmonella Infections, Animal/immunology/*microbiology/prevention & control ; Salmonella typhimurium/*enzymology/genetics/immunology/*pathogenicity ; Site-Specific DNA-Methyltransferase (Adenine-Specific)/antagonists & ; inhibitors/genetics/*metabolism ; Vaccines, Attenuated ; Virulence/genetics
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    Testing the genetics of behavior in mice (1999)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1999-10-16
    Description: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Dawson, G R -- Flint, J -- Wilkinson, L S -- New York, N.Y. -- Science. 1999 Sep 24;285(5436):2068; author reply 2069-70.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/10523201" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Animals, Laboratory/genetics ; *Behavior, Animal ; Confounding Factors (Epidemiology) ; Genetics, Behavioral/*methods ; Handling (Psychology) ; Mice ; Reproducibility of Results
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    A molecular pathway revealing a genetic basis for human cardiac and craniofacial defects (1999)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1999-02-19
    Description: Microdeletions of chromosome 22q11 are the most common genetic defects associated with cardiac and craniofacial anomalies in humans. A screen for mouse genes dependent on dHAND, a transcription factor implicated in neural crest development, identified Ufd1, which maps to human 22q11 and encodes a protein involved in degradation of ubiquitinated proteins. Mouse Ufd1 was specifically expressed in most tissues affected in patients with 22q11 deletion syndrome. The human UFD1L gene was deleted in all 182 patients studied with 22q11 deletion, and a smaller deletion of approximately 20 kilobases that removed exons 1 to 3 of UFD1L was found in one individual with features typical of 22q11 deletion syndrome. These data suggest that UFD1L haploinsufficiency contributes to the congenital heart and craniofacial defects seen in 22q11 deletion.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Yamagishi, H -- Garg, V -- Matsuoka, R -- Thomas, T -- Srivastava, D -- R01HL57181-01/HL/NHLBI NIH HHS/ -- New York, N.Y. -- Science. 1999 Feb 19;283(5405):1158-61.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Pediatrics, Division of Cardiology, University of Texas Southwestern Medical Center, 6000 Harry Hines Boulevard, Room NA8.124, Dallas, TX 75235-9148, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/10024240" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Aorta, Thoracic/abnormalities/embryology/metabolism ; Basic Helix-Loop-Helix Transcription Factors ; Cell Cycle Proteins/genetics ; Chromosomes, Human, Pair 22/*genetics ; Craniofacial Abnormalities/*genetics ; DNA-Binding Proteins/genetics/physiology ; Embryo, Mammalian/metabolism ; *Gene Deletion ; Gene Expression Regulation, Developmental ; Heart/embryology ; Heart Defects, Congenital/*genetics ; Humans ; Mice ; Neural Crest/cytology/embryology ; Phenotype ; Proteins/*genetics/physiology ; Transcription Factors/genetics/physiology ; Ubiquitins/metabolism ; Zebrafish Proteins
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    Defective thymocyte maturation in p44 MAP kinase (Erk 1) knockout mice (1999)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1999-11-13
    Description: The p42 and p44 mitogen-activated protein kinases (MAPKs), also called Erk2 and Erk1, respectively, have been implicated in proliferation as well as in differentiation programs. The specific role of the p44 MAPK isoform in the whole animal was evaluated by generation of p44 MAPK-deficient mice by homologous recombination in embryonic stem cells. The p44 MAPK-/- mice were viable, fertile, and of normal size. Thus, p44 MAPK is apparently dispensable and p42 MAPK (Erk2) may compensate for its loss. However, in p44 MAPK-/- mice, thymocyte maturation beyond the CD4+CD8+ stage was reduced by half, with a similar diminution in the thymocyte subpopulation expressing high levels of T cell receptor (CD3high). In p44 MAPK-/- thymocytes, proliferation in response to activation with a monoclonal antibody to the T cell receptor in the presence of phorbol myristate acetate was severely reduced even though activation of p42 MAPK was more sustained in these cells. The p44 MAPK apparently has a specific role in thymocyte development.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Pages, G -- Guerin, S -- Grall, D -- Bonino, F -- Smith, A -- Anjuere, F -- Auberger, P -- Pouyssegur, J -- New York, N.Y. -- Science. 1999 Nov 12;286(5443):1374-7.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Institute of Signaling, Developmental Biology and Cancer Research, CNRS UMR 6543, Centre A. Lacassagne, 33 Avenue de Valombrose, 06189 Nice, France. gpages@unice.fr〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/10558995" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Antibodies, Monoclonal ; Antigens, CD/analysis ; Antigens, CD3/immunology ; Cell Differentiation ; Cell Division ; Cells, Cultured ; DNA/biosynthesis ; Enzyme Activation ; Gene Targeting ; Isoenzymes/genetics/metabolism ; Mice ; Mice, Knockout ; Mitogen-Activated Protein Kinase 1/metabolism ; Mitogen-Activated Protein Kinase 3 ; Mitogen-Activated Protein Kinases/deficiency/genetics/*metabolism ; Phosphorylation ; Polymorphism, Restriction Fragment Length ; Receptors, Antigen, T-Cell, alpha-beta/analysis/physiology ; T-Lymphocyte Subsets/*cytology/enzymology/immunology ; Tetradecanoylphorbol Acetate/pharmacology ; Thymus Gland/*cytology
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    Animal testing. One mouse's meat is another one's poison (1999)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1999-09-15
    Description: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Helmuth, L -- New York, N.Y. -- Science. 1999 Aug 20;285(5431):1190-1.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/10484726" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Estradiol/*pharmacology/toxicity ; *Genetic Variation ; Humans ; Litter Size ; Male ; Maximum Allowable Concentration ; Mice ; Mice, Inbred Strains ; Species Specificity ; Spermatogenesis/*drug effects ; Testis/*drug effects ; *Toxicity Tests
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    Testing the genetics of behavior in mice (1999)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1999-10-16
    Description: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Hen, R -- New York, N.Y. -- Science. 1999 Sep 24;285(5436):2068-9; author reply 2069-70.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/10523202" target="_blank"〉PubMed〈/a〉
    Keywords: *Alcohol Drinking ; Animals ; Crosses, Genetic ; *Gene Frequency ; Mice ; Mice, Knockout/*genetics ; Receptor, Serotonin, 5-HT1B ; Receptors, Serotonin/genetics/*physiology ; Stem Cells
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    Paracellin-1, a renal tight junction protein required for paracellular Mg2+ resorption (1999)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1999-07-03
    Description: Epithelia permit selective and regulated flux from apical to basolateral surfaces by transcellular passage through cells or paracellular flux between cells. Tight junctions constitute the barrier to paracellular conductance; however, little is known about the specific molecules that mediate paracellular permeabilities. Renal magnesium ion (Mg2+) resorption occurs predominantly through a paracellular conductance in the thick ascending limb of Henle (TAL). Here, positional cloning has identified a human gene, paracellin-1 (PCLN-1), mutations in which cause renal Mg2+ wasting. PCLN-1 is located in tight junctions of the TAL and is related to the claudin family of tight junction proteins. These findings provide insight into Mg2+ homeostasis, demonstrate the role of a tight junction protein in human disease, and identify an essential component of a selective paracellular conductance.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Simon, D B -- Lu, Y -- Choate, K A -- Velazquez, H -- Al-Sabban, E -- Praga, M -- Casari, G -- Bettinelli, A -- Colussi, G -- Rodriguez-Soriano, J -- McCredie, D -- Milford, D -- Sanjad, S -- Lifton, R P -- F.1/Telethon/Italy -- R01DK51696/DK/NIDDK NIH HHS/ -- TGM06S01/Telethon/Italy -- New York, N.Y. -- Science. 1999 Jul 2;285(5424):103-6.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Howard Hughes Medical Institute, Department of Genetics, Yale University School of Medicine, New Haven, CT 06510, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/10390358" target="_blank"〉PubMed〈/a〉
    Keywords: Amino Acid Sequence ; Calcium/urine ; Chromosomes, Human, Pair 3/genetics ; Claudins ; Cloning, Molecular ; Female ; Genes, Recessive ; Homeostasis ; Humans ; Kidney Diseases/*genetics/metabolism ; Kidney Tubules/chemistry ; Loop of Henle/chemistry/*metabolism ; Magnesium/blood/*metabolism ; Magnesium Deficiency/*genetics/metabolism ; Male ; Membrane Proteins/analysis/chemistry/genetics/*physiology ; Molecular Sequence Data ; Mutation ; Pedigree ; Physical Chromosome Mapping ; Tight Junctions/*metabolism
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    Prions: a lone killer or a vital accomplice? (1999)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1999-11-30
    Description: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Balter, M -- New York, N.Y. -- Science. 1999 Oct 22;286(5440):660-2.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/10577216" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; B-Lymphocytes/chemistry/physiology ; Dendritic Cells, Follicular/chemistry/physiology ; Gene Targeting ; Genetic Predisposition to Disease ; Humans ; Mice ; Mice, Transgenic ; Mutation ; Neurons/chemistry ; Prion Diseases/*etiology/genetics/therapy ; Prions/genetics/metabolism/*pathogenicity
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    Regulated delivery of therapeutic proteins after in vivo somatic cell gene transfer (1999)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1999
    Description: Stable delivery of a therapeutic protein under pharmacologic control was achieved through in vivo somatic gene transfer. This system was based on the expression of two chimeric, human-derived proteins that were reconstituted by rapamycin into a transcription factor complex. A mixture of two adeno-associated virus vectors, one expressing the transcription factor chimeras and one containing erythropoietin (Epo) under the control of a promoter responsive to the transcription factor, was injected into skeletal muscle of immune-competent mice. Administration of rapamycin resulted in 200-fold induction of plasma Epo. Stable engraftment of this humanized system in immune-competent mice was achieved for 6 months with similar results for at least 3 months in a rhesus monkey.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Ye, X -- Rivera, V M -- Zoltick, P -- Cerasoli, F Jr -- Schnell, M A -- Gao, G -- Hughes, J V -- Gilman, M -- Wilson, J M -- P01 AR/NS43648-03/AR/NIAMS NIH HHS/ -- P30 DK47757-05/DK/NIDDK NIH HHS/ -- New York, N.Y. -- Science. 1999 Jan 1;283(5398):88-91.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Institute for Human Gene Therapy, University of Pennsylvania, Philadelphia, PA 19104, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/9872748" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Cytomegalovirus/genetics ; Dependovirus/genetics ; Erythropoietin/administration & dosage/blood/*genetics ; Female ; Gene Expression Regulation ; *Gene Transfer Techniques ; Genetic Therapy/*methods ; Genetic Vectors ; Hematocrit ; Injections, Intramuscular ; Macaca mulatta ; Male ; Mice ; Mice, Inbred BALB C ; Mice, Nude ; Muscle, Skeletal ; Promoter Regions, Genetic ; Recombinant Fusion Proteins ; Recombinant Proteins ; Sirolimus/*pharmacology ; Transcription Factors/*genetics
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    Positive and negative regulation of IkappaB kinase activity through IKKbeta subunit phosphorylation (1999)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1999-04-09
    Description: IkappaB [inhibitor of nuclear factor kappaB (NF-kappaB)] kinase (IKK) phosphorylates IkappaB inhibitory proteins, causing their degradation and activation of transcription factor NF-kappaB, a master activator of inflammatory responses. IKK is composed of three subunits-IKKalpha and IKKbeta, which are highly similar protein kinases, and IKKgamma, a regulatory subunit. In mammalian cells, phosphorylation of two sites at the activation loop of IKKbeta was essential for activation of IKK by tumor necrosis factor and interleukin-1. Elimination of equivalent sites in IKKalpha, however, did not interfere with IKK activation. Thus, IKKbeta, not IKKalpha, is the target for proinflammatory stimuli. Once activated, IKKbeta autophosphorylated at a carboxyl-terminal serine cluster. Such phosphorylation decreased IKK activity and may prevent prolonged activation of the inflammatory response.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Delhase, M -- Hayakawa, M -- Chen, Y -- Karin, M -- R01 AI43477/AI/NIAID NIH HHS/ -- R37 ES04151/ES/NIEHS NIH HHS/ -- New York, N.Y. -- Science. 1999 Apr 9;284(5412):309-13.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Laboratory of Gene Regulation and Signal Transduction, Department of Pharmacology, University of California, San Diego, 9500 Gilman Drive, La Jolla, CA 92093-0636, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/10195894" target="_blank"〉PubMed〈/a〉
    Keywords: Amino Acid Sequence ; Amino Acid Substitution ; Cell Line ; DNA-Binding Proteins/metabolism ; Enzyme Activation ; HeLa Cells ; Helix-Loop-Helix Motifs ; Humans ; I-kappa B Kinase ; I-kappa B Proteins ; Interleukin-1/pharmacology ; Leucine Zippers ; *MAP Kinase Kinase Kinase 1 ; Molecular Sequence Data ; Mutation ; Phosphorylation ; Phosphoserine/metabolism ; Protein-Serine-Threonine Kinases/chemistry/genetics/*metabolism ; Transfection ; Tumor Necrosis Factor-alpha/pharmacology
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    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
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    Requirement for B cell linker protein (BLNK) in B cell development (1999)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1999-12-03
    Description: Linker proteins function as molecular scaffolds to localize enzymes with substrates. In B cells, B cell linker protein (BLNK) links the B cell receptor (BCR)-activated Syk kinase to the phosphoinositide and mitogen-activated kinase pathways. To examine the in vivo role of BLNK, mice deficient in BLNK were generated. B cell development in BLNK-/- mice was blocked at the transition from B220+CD43+ progenitor B to B220+CD43- precursor B cells. Only a small percentage of immunoglobulin M++ (IgM++), but not mature IgMloIgDhi, B cells were detected in the periphery. Hence, BLNK is an essential component of BCR signaling pathways and is required to promote B cell development.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Pappu, R -- Cheng, A M -- Li, B -- Gong, Q -- Chiu, C -- Griffin, N -- White, M -- Sleckman, B P -- Chan, A C -- AI42787/AI/NIAID NIH HHS/ -- CA71516/CA/NCI NIH HHS/ -- New York, N.Y. -- Science. 1999 Dec 3;286(5446):1949-54.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Center for Immunology, Division of Rheumatology, Department of Medicine, Howard Hughes Medical Institute, 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/10583957" target="_blank"〉PubMed〈/a〉
    Keywords: Adaptor Proteins, Signal Transducing ; Aging ; Animals ; B-Lymphocyte Subsets/cytology/immunology ; B-Lymphocytes/*cytology/immunology/*metabolism ; Bone Marrow Cells/cytology/immunology ; Carrier Proteins/genetics/*physiology ; Cell Count ; Cell Differentiation ; Cell Separation ; Cell Size ; Flow Cytometry ; Gene Targeting ; Hematopoietic Stem Cells/*cytology/metabolism ; Immunoglobulin M/analysis ; Leukopoiesis ; Lymphoid Tissue/cytology/immunology ; Mice ; Mice, Inbred C57BL ; *Phosphoproteins ; Receptors, Antigen, B-Cell/*metabolism ; Second Messenger Systems ; Signal Transduction
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    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
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  • 42
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    Structure of the VHL-ElonginC-ElonginB complex: implications for VHL tumor suppressor function (1999)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1999-04-16
    Description: Mutation of the VHL tumor suppressor is associated with the inherited von Hippel-Lindau (VHL) cancer syndrome and the majority of kidney cancers. VHL binds the ElonginC-ElonginB complex and regulates levels of hypoxia-inducible proteins. The structure of the ternary complex at 2.7 angstrom resolution shows two interfaces, one between VHL and ElonginC and another between ElonginC and ElonginB. Tumorigenic mutations frequently occur in a 35-residue domain of VHL responsible for ElonginC binding. A mutational patch on a separate domain of VHL indicates a second macromolecular binding site. The structure extends the similarities to the SCF (Skp1-Cul1-F-box protein) complex that targets proteins for degradation, supporting the hypothesis that VHL may function in an analogous pathway.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Stebbins, C E -- Kaelin, W G Jr -- Pavletich, N P -- New York, N.Y. -- Science. 1999 Apr 16;284(5413):455-61.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Biochemistry and Structural Biology, Joan and Sanford I. Weill Graduate School of Medical Sciences, Cornell University, New York, NY 10021, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/10205047" target="_blank"〉PubMed〈/a〉
    Keywords: Amino Acid Sequence ; Binding Sites ; Cell Cycle Proteins/chemistry/metabolism ; Cloning, Molecular ; Crystallography, X-Ray ; *Genes, Tumor Suppressor ; Humans ; Hydrogen Bonding ; *Ligases ; Models, Molecular ; Molecular Sequence Data ; Mutation ; Mutation, Missense ; Neoplasms/genetics ; Protein Conformation ; Protein Folding ; Protein Structure, Secondary ; Proteins/*chemistry/genetics/metabolism ; S-Phase Kinase-Associated Proteins ; Surface Properties ; Transcription Factors/*chemistry/metabolism ; *Tumor Suppressor Proteins ; *Ubiquitin-Protein Ligases ; Von Hippel-Lindau Tumor Suppressor Protein ; von Hippel-Lindau Disease/*genetics
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    Focal adhesion motility revealed in stationary fibroblasts (1999)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1999-11-05
    Description: Focal adhesions (FAs) are clustered integrins and associated proteins that mediate cell adhesion and signaling. A green fluorescent protein-beta1 integrin chimera was used to label FAs in living cells. In stationary cells, FAs were highly motile, moving linearly for several plaque lengths toward the cell center. FA motility was independent of cell density and resulted from contraction of associated actin fibers. In migrating cells, FAs were stationary and only moved in the tail. FA motility in stationary cells suggests that cell movement may be regulated by a clutch-like mechanism by which the affinity of integrins to substrate may be altered in response to migratory cues.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Smilenov, L B -- Mikhailov, A -- Pelham, R J -- Marcantonio, E E -- Gundersen, G G -- GM42026/GM/NIGMS NIH HHS/ -- GM44585/GM/NIGMS NIH HHS/ -- New York, N.Y. -- Science. 1999 Nov 5;286(5442):1172-4.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Pathology, Columbia University, New York, NY 10032, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/10550057" target="_blank"〉PubMed〈/a〉
    Keywords: 3T3 Cells ; Actins/physiology ; Animals ; Antigens, CD29/*metabolism ; *Cell Adhesion ; Cell Count ; Cell Line ; *Cell Movement ; Fibroblasts/*cytology/metabolism ; Fluorescence ; Green Fluorescent Proteins ; Luminescent Proteins ; Mice ; Microscopy, Interference ; Rats ; Recombinant Fusion Proteins/metabolism
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  • 44
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    Increased insulin sensitivity and obesity resistance in mice lacking the protein tyrosine phosphatase-1B gene (1999)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1999-03-05
    Description: Protein tyrosine phosphatase-1B (PTP-1B) has been implicated in the negative regulation of insulin signaling. Disruption of the mouse homolog of the gene encoding PTP-1B yielded healthy mice that, in the fed state, had blood glucose concentrations that were slightly lower and concentrations of circulating insulin that were one-half those of their PTP-1B+/+ littermates. The enhanced insulin sensitivity of the PTP-1B-/- mice was also evident in glucose and insulin tolerance tests. The PTP-1B-/- mice showed increased phosphorylation of the insulin receptor in liver and muscle tissue after insulin injection in comparison to PTP-1B+/+ mice. On a high-fat diet, the PTP-1B-/- and PTP-1B+/- mice were resistant to weight gain and remained insulin sensitive, whereas the PTP-1B+/+ mice rapidly gained weight and became insulin resistant. These results demonstrate that PTP-1B has a major role in modulating both insulin sensitivity and fuel metabolism, thereby establishing it as a potential therapeutic target in the treatment of type 2 diabetes and obesity.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Elchebly, M -- Payette, P -- Michaliszyn, E -- Cromlish, W -- Collins, S -- Loy, A L -- Normandin, D -- Cheng, A -- Himms-Hagen, J -- Chan, C C -- Ramachandran, C -- Gresser, M J -- Tremblay, M L -- Kennedy, B P -- New York, N.Y. -- Science. 1999 Mar 5;283(5407):1544-8.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Biochemistry, McGill University, 3655 Drummond Street, Montreal, Quebec, Canada, H3G 1Y6.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/10066179" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Blood Glucose/metabolism ; Diabetes Mellitus, Type 2/therapy ; Dietary Fats/administration & dosage ; Gene Targeting ; Glucose Tolerance Test ; Insulin/blood/*metabolism/pharmacology ; Insulin Receptor Substrate Proteins ; Insulin Resistance ; Liver/metabolism ; Male ; Mice ; Mice, Knockout ; Muscle, Skeletal/metabolism ; Obesity/*metabolism/therapy ; Phosphoproteins/metabolism ; Phosphorylation ; Phosphotyrosine/metabolism ; Protein Tyrosine Phosphatases/*genetics/*metabolism ; Receptor, Insulin/metabolism ; Signal Transduction
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  • 45
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    Bile acids: natural ligands for an orphan nuclear receptor (1999)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1999-05-21
    Description: Bile acids regulate the transcription of genes that control cholesterol homeostasis through molecular mechanisms that are poorly understood. Physiological concentrations of free and conjugated chenodeoxycholic acid, lithocholic acid, and deoxycholic acid activated the farnesoid X receptor (FXR; NR1H4), an orphan nuclear receptor. As ligands, these bile acids and their conjugates modulated interaction of FXR with a peptide derived from steroid receptor coactivator 1. These results provide evidence for a nuclear bile acid signaling pathway that may regulate cholesterol homeostasis.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Parks, D J -- Blanchard, S G -- Bledsoe, R K -- Chandra, G -- Consler, T G -- Kliewer, S A -- Stimmel, J B -- Willson, T M -- Zavacki, A M -- Moore, D D -- Lehmann, J M -- F32 DK09793/DK/NIDDK NIH HHS/ -- R01 DK53366/DK/NIDDK NIH HHS/ -- New York, N.Y. -- Science. 1999 May 21;284(5418):1365-8.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Molecular Biochemistry, Glaxo Wellcome Research and Development, Research Triangle Park NC, 27709, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/10334993" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Bile Acids and Salts/chemistry/*metabolism/pharmacology ; Carrier Proteins/metabolism ; Cell Line ; Chenodeoxycholic Acid/*metabolism/pharmacology ; Cholesterol/metabolism ; DNA-Binding Proteins/chemistry/genetics/*metabolism ; Deoxycholic Acid/metabolism/pharmacology ; Histone Acetyltransferases ; Homeostasis ; Humans ; Ligands ; Lithocholic Acid/metabolism/pharmacology ; Mice ; Nuclear Receptor Coactivator 1 ; *Organic Anion Transporters, Sodium-Dependent ; Protein Conformation ; Receptors, Cytoplasmic and Nuclear/chemistry/genetics/*metabolism ; Recombinant Fusion Proteins/metabolism ; Signal Transduction ; Structure-Activity Relationship ; *Symporters ; Transcription Factors/chemistry/genetics/*metabolism ; Transfection
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  • 46
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    Control of autoimmune diabetes in NOD mice by GAD expression or suppression in beta cells (1999)
    American Association for the Advancement of Science (AAAS)
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    Publication Date: 1999-05-15
    Description: Glutamic acid decarboxylase (GAD) is a pancreatic beta cell autoantigen in humans and nonobese diabetic (NOD) mice. beta Cell-specific suppression of GAD expression in two lines of antisense GAD transgenic NOD mice prevented autoimmune diabetes, whereas persistent GAD expression in the beta cells in the other four lines of antisense GAD transgenic NOD mice resulted in diabetes, similar to that seen in transgene-negative NOD mice. Complete suppression of beta cell GAD expression blocked the generation of diabetogenic T cells and protected islet grafts from autoimmune injury. Thus, beta cell-specific GAD expression is required for the development of autoimmune diabetes in NOD mice, and modulation of GAD might, therefore, have therapeutic value in type 1 diabetes.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Yoon, J W -- Yoon, C S -- Lim, H W -- Huang, Q Q -- Kang, Y -- Pyun, K H -- Hirasawa, K -- Sherwin, R S -- Jun, H S -- DK 45735/DK/NIDDK NIH HHS/ -- DK 53015-01/DK/NIDDK NIH HHS/ -- New York, N.Y. -- Science. 1999 May 14;284(5417):1183-7.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Laboratory of Viral and Immunopathogenesis of Diabetes, Julia McFarlane Diabetes Research Centre, Faculty of Medicine, University of Calgary, Calgary, Alberta T2N 4N1, Canada. yoon@ucalgary.edu〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/10325232" target="_blank"〉PubMed〈/a〉
    Keywords: Adoptive Transfer ; Animals ; Autoantigens/genetics/*immunology/physiology ; Autoimmunity ; DNA, Antisense ; Diabetes Mellitus, Type 1/*enzymology/*immunology/pathology ; Female ; Gene Expression ; Glutamate Decarboxylase/genetics/*immunology/physiology ; Insulin/blood/metabolism ; Islets of Langerhans/*enzymology/immunology/metabolism/pathology ; Islets of Langerhans Transplantation ; Lymphocyte Activation ; Male ; Mice ; Mice, Inbred NOD ; Mice, SCID ; Mice, Transgenic ; T-Lymphocytes/immunology ; Transgenes
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  • 47
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    Abnormal morphogenesis but intact IKK activation in mice lacking the IKKalpha subunit of IkappaB kinase (1999)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1999-04-09
    Description: The oligomeric IkappaB kinase (IKK) is composed of three polypeptides: IKKalpha and IKKbeta, the catalytic subunits, and IKKgamma, a regulatory subunit. IKKalpha and IKKbeta are similar in structure and thought to have similar function-phosphorylation of the IkappaB inhibitors in response to proinflammatory stimuli. Such phosphorylation leads to degradation of IkappaB and activation of nuclear factor kappaB transcription factors. The physiological function of these protein kinases was explored by analysis of IKKalpha-deficient mice. IKKalpha was not required for activation of IKK and degradation of IkappaB by proinflammatory stimuli. Instead, loss of IKKalpha interfered with multiple morphogenetic events, including limb and skeletal patterning and proliferation and differentiation of epidermal keratinocytes.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Hu, Y -- Baud, V -- Delhase, M -- Zhang, P -- Deerinck, T -- Ellisman, M -- Johnson, R -- Karin, M -- R01 AI43477/AI/NIAID NIH HHS/ -- R37 ES04151/ES/NIEHS NIH HHS/ -- RR04050/RR/NCRR NIH HHS/ -- New York, N.Y. -- Science. 1999 Apr 9;284(5412):316-20.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Pharmacology, Cancer Center, University of California San Diego, La Jolla, CA 92093-0636, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/10195896" target="_blank"〉PubMed〈/a〉
    Keywords: Abnormalities, Multiple/enzymology/genetics ; Animals ; Apoptosis ; Body Patterning ; Bone and Bones/abnormalities/embryology ; Cell Differentiation ; Cell Nucleus/metabolism ; Cells, Cultured ; DNA-Binding Proteins/metabolism ; Dimerization ; *Embryonic and Fetal Development ; Enzyme Activation ; Epidermis/cytology/embryology ; Female ; Gene Targeting ; I-kappa B Kinase ; I-kappa B Proteins ; Keratinocytes ; Limb Deformities, Congenital/enzymology ; Male ; Mice ; *Morphogenesis ; Mutation ; Phosphorylation ; Protein-Serine-Threonine Kinases/chemistry/genetics/*metabolism ; Skin/embryology ; Skin Abnormalities/enzymology
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    Neuronal protection in stroke by an sLex-glycosylated complement inhibitory protein (1999)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1999-07-27
    Description: Glycoprotein adhesion receptors such as selectins contribute to tissue injury in stroke. Ischemic neurons strongly expressed C1q, which may target them for complement-mediated attack or C1qRp-mediated clearance. A hybrid molecule was used to simultaneously inhibit both complement activation and selectin-mediated adhesion. The extracellular domain of soluble complement receptor-1 (sCR1) was sialyl Lewis x glycosylated (sCR1sLex) to inhibit complement activation and endothelial-platelet-leukocyte interactions. sCR1 and sCR1sLex colocalized to ischemic cerebral microvessels and C1q-expressing neurons, inhibited neutrophil and platelet accumulation, and reduced cerebral infarct volumes. Additional benefit was conferred by sialyl Lewis x glycosylation of the unmodified parent sCR1 molecule.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Huang, J -- Kim, L J -- Mealey, R -- Marsh, H C Jr -- Zhang, Y -- Tenner, A J -- Connolly, E S Jr -- Pinsky, D J -- R01 HL55397/HL/NHLBI NIH HHS/ -- R01 HL59488/HL/NHLBI NIH HHS/ -- R01 NS35144/NS/NINDS NIH HHS/ -- etc. -- New York, N.Y. -- Science. 1999 Jul 23;285(5427):595-9.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Columbia University, College of Physicians and Surgeons, 630 West 168th Street, New York, NY 10032, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/10417391" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Blood Platelets/physiology ; Cell Adhesion ; Cerebral Cortex/blood supply/immunology/metabolism ; Cerebral Infarction/drug therapy ; Cerebrovascular Circulation ; Cerebrovascular Disorders/*drug therapy/immunology/physiopathology ; Complement Activation ; Complement C1q/metabolism ; Glycosylation ; Humans ; Ischemic Attack, Transient/*drug therapy/immunology/physiopathology ; Leukocytes/physiology ; Mice ; Neurons/immunology/metabolism ; Neuroprotective Agents/administration & dosage/adverse ; effects/metabolism/*therapeutic use ; Neutrophils/physiology ; Oligosaccharides/administration & dosage/adverse effects/metabolism/*therapeutic ; use ; Platelet Adhesiveness ; Receptors, Complement/administration & dosage/metabolism/*therapeutic use ; Reperfusion Injury/drug therapy/immunology/metabolism ; Selectins/metabolism ; Time Factors
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    Behavioral genetics. Fickle mice highlight test problems (1999)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1999-06-26
    Description: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Enserink, M -- New York, N.Y. -- Science. 1999 Jun 4;284(5420):1599-600.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/10383330" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Animals, Laboratory ; Anxiety ; *Behavior, Animal ; *Environment ; Genetics, Behavioral/*methods ; Mice ; Mice, Inbred Strains ; Mice, Mutant Strains ; Psychological Tests ; Reproducibility of Results
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  • 50
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    Reciprocal inhibitory connections and network synchrony in the mammalian thalamus (1999)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1999-01-23
    Description: Neuronal rhythmic activities within thalamocortical circuits range from partially synchronous oscillations during normal sleep to hypersynchrony associated with absence epilepsy. It has been proposed that recurrent inhibition within the thalamic reticular nucleus serves to reduce synchrony and thus prevents seizures. Inhibition and synchrony in slices from mice devoid of the gamma-aminobutyric acid type-A (GABAA) receptor beta3 subunit were examined, because in rodent thalamus, beta3 is largely restricted to reticular nucleus. In beta3 knockout mice, GABAA-mediated inhibition was nearly abolished in reticular nucleus, but was unaffected in relay cells. In addition, oscillatory synchrony was dramatically intensified. Thus, recurrent inhibitory connections within reticular nucleus act as "desynchronizers."〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Huntsman, M M -- Porcello, D M -- Homanics, G E -- DeLorey, T M -- Huguenard, J R -- AA10422/AA/NIAAA NIH HHS/ -- NS06477/NS/NINDS NIH HHS/ -- NS34774/NS/NINDS NIH HHS/ -- etc. -- New York, N.Y. -- Science. 1999 Jan 22;283(5401):541-3.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Neurology and Neurological Sciences, Stanford University Medical Center, Stanford University, Stanford, CA 94305, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/9915702" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; GABA Antagonists/pharmacology ; In Vitro Techniques ; Mice ; Mice, Knockout ; Nerve Net/*physiology ; *Neural Inhibition ; Neural Pathways/physiology ; Neurons/*physiology ; Patch-Clamp Techniques ; Picrotoxin/pharmacology ; Receptors, GABA-A/genetics/*physiology ; *Synaptic Transmission ; Thalamic Nuclei/physiology ; Thalamus/*physiology
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  • 51
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    NMDA receptor-mediated K+ efflux and neuronal apoptosis (1999)
    American Association for the Advancement of Science (AAAS)
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    Publication Date: 1999-04-09
    Description: Neuronal death induced by activating N-methyl-D-aspartate (NMDA) receptors has been linked to Ca2+ and Na+ influx through associated channels. Whole-cell recording from cultured mouse cortical neurons revealed a NMDA-evoked outward current, INMDA-K, carried by K+ efflux at membrane potentials positive to -86 millivolts. Cortical neurons exposed to NMDA in medium containing reduced Na+ and Ca2+ (as found in ischemic brain tissue) lost substantial intracellular K+ and underwent apoptosis. Both K+ loss and apoptosis were attenuated by increasing extracellular K+, even when voltage-gated Ca2+ channels were blocked. Thus NMDA receptor-mediated K+ efflux may contribute to neuronal apoptosis after brain ischemia.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Yu, S P -- Yeh, C -- Strasser, U -- Tian, M -- Choi, D W -- NS 30337/NS/NINDS NIH HHS/ -- NS 32636/NS/NINDS NIH HHS/ -- New York, N.Y. -- Science. 1999 Apr 9;284(5412):336-9.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Center for the Study of Nervous System Injury and Department of Neurology, 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/10195902" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; *Apoptosis ; Calcium/metabolism/pharmacology ; Calcium Channels/metabolism ; Cells, Cultured ; Cerebral Cortex/*cytology/metabolism ; Culture Techniques ; Glutamic Acid/metabolism ; Ion Channel Gating ; Ion Transport ; Membrane Potentials ; Mice ; N-Methylaspartate/pharmacology ; Neocortex/cytology/embryology/metabolism ; Neurons/*cytology/metabolism ; Patch-Clamp Techniques ; Potassium/*metabolism ; Receptors, N-Methyl-D-Aspartate/*metabolism ; Sodium/metabolism/pharmacology
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    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
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    X-ray crystallographic structure of the Norwalk virus capsid (1999)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1999-10-09
    Description: Norwalk virus, a noncultivatable human calicivirus, is the major cause of epidemic gastroenteritis in humans. The first x-ray structure of a calicivirus capsid, which consists of 180 copies of a single protein, has been determined by phase extension from a low-resolution electron microscopy structure. The capsid protein has a protruding (P) domain connected by a flexible hinge to a shell (S) domain that has a classical eight-stranded beta-sandwich motif. The structure of the P domain is unlike that of any other viral protein with a subdomain exhibiting a fold similar to that of the second domain in the eukaryotic translation elongation factor-Tu. This subdomain, located at the exterior of the capsid, has the largest sequence variation among Norwalk-like human caliciviruses and is likely to contain the determinants of strain specificity and cell binding.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Prasad, B V -- Hardy, M E -- Dokland, T -- Bella, J -- Rossmann, M G -- Estes, M K -- New York, N.Y. -- Science. 1999 Oct 8;286(5438):287-90.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Verna and Marrs Mclean Department of Biochemistry, Division of Molecular Virology, Baylor College of Medicine, Houston, TX 77030, USA. bprasad@bcm.tmc.edu〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/10514371" target="_blank"〉PubMed〈/a〉
    Keywords: Amino Acid Sequence ; Capsid/*chemistry/metabolism ; *Capsid Proteins ; Cryoelectron Microscopy ; Crystallography, X-Ray ; Dimerization ; Genome, Viral ; Humans ; Hydrogen Bonding ; Image Processing, Computer-Assisted ; Models, Molecular ; Molecular Sequence Data ; Norwalk virus/*chemistry/genetics/physiology ; Protein Conformation ; Protein Folding ; Protein Structure, Secondary ; Recombinant Proteins/chemistry ; Virus Assembly
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    The mammalian gene collection (1999)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1999-10-16
    Description: The Mammalian Gene Collection (MGC) project is a new effort by the NIH to generate full-length complementary DNA (cDNA) resources. This project will provide publicly accessible resources to the full research community. The MGC project entails the production of libraries, sequencing, and database and repository development, as well as the support of library construction, sequencing, and analytic technologies dedicated to the goal of obtaining a full set of human and other mammalian full-length (open reading frame) sequences and clones of expressed genes.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Strausberg, R L -- Feingold, E A -- Klausner, R D -- Collins, F S -- New York, N.Y. -- Science. 1999 Oct 15;286(5439):455-7.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉National Cancer Institute, National Human Genome Research Institute, 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/10521335" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Base Sequence ; Computational Biology ; DNA, Complementary ; Databases, Factual ; Expressed Sequence Tags ; *Gene Library ; *Genome ; *Genome, Human ; Humans ; Mammals/*genetics ; Mice ; National Institutes of Health (U.S.) ; Private Sector ; Public Sector ; *Sequence Analysis, DNA ; United States
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    Nota bene: development. Whirling dervishes (1999)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1999-12-28
    Description: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Smith, O -- New York, N.Y. -- Science. 1999 Nov 12;286(5443):1311.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/10610537" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Cilia/*physiology ; Dyneins/genetics/physiology ; Embryo, Mammalian/*cytology ; *Embryonic and Fetal Development ; Mice ; Mice, Mutant Strains ; *Morphogenesis ; Movement ; Proteins/genetics/physiology ; *Transcription Factors
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    Requirement for type 2 NO synthase for IL-12 signaling in innate immunity (1999)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1999-05-13
    Description: Interleukin-12 (IL-12) and type 2 NO synthase (NOS2) are crucial for defense against bacterial and parasitic pathogens, but their relationship in innate immunity is unknown. In the absence of NOS2 activity, IL-12 was unable to prevent spreading of Leishmania parasites, did not stimulate natural killer (NK) cells for cytotoxicity or interferon-gamma (IFN-gamma) release, and failed to activate Tyk2 kinase and to tyrosine phosphorylate Stat4 (the central signal transducer of IL-12) in NK cells. Activation of Tyk2 in NK cells by IFN-alpha/beta also required NOS2. Thus, NOS2-derived NO is a prerequisite for cytokine signaling and function in innate immunity.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Diefenbach, A -- Schindler, H -- Rollinghoff, M -- Yokoyama, W M -- Bogdan, C -- New York, N.Y. -- Science. 1999 May 7;284(5416):951-5.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Institut fur Klinische Mikrobiologie, Immunologie und Hygiene, Universitat Erlangen, Wasserturmstrasse 3, D-91054 Erlangen, Germany.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/10320373" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Cells, Cultured ; Cyclic GMP/metabolism ; Cytotoxicity, Immunologic ; DNA-Binding Proteins/metabolism ; Enzyme Activation ; Enzyme Inhibitors/pharmacology ; Immunity, Innate ; Interferon-gamma/biosynthesis/genetics ; Interferons/pharmacology ; Interleukin-12/pharmacology/*physiology ; Janus Kinase 2 ; Killer Cells, Natural/*immunology/metabolism ; *Leishmania major ; Leishmaniasis, Cutaneous/*immunology/metabolism ; Lysine/analogs & derivatives/pharmacology ; Mice ; Mice, Inbred BALB C ; Mice, Inbred C57BL ; Nitric Oxide/metabolism ; Nitric Oxide Synthase/antagonists & inhibitors/*metabolism ; Nitric Oxide Synthase Type II ; Phosphorylation ; Protein-Tyrosine Kinases/metabolism ; Proteins/metabolism ; *Proto-Oncogene Proteins ; STAT4 Transcription Factor ; *Signal Transduction ; TYK2 Kinase ; Trans-Activators/metabolism ; Up-Regulation
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    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
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    Nota bene: biomedicine. Pain-killer genes (1999)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1999-06-26
    Description: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Smith, O -- New York, N.Y. -- Science. 1999 Jun 4;284(5420):1634.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/10383343" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Chronic Disease ; Enkephalin, Methionine/biosynthesis/metabolism ; Enkephalins/*genetics ; Gene Transfer Techniques ; *Genetic Therapy ; Genetic Vectors ; Humans ; Mice ; *Pain Management ; Protein Precursors/*genetics ; Simplexvirus/genetics/physiology ; Spinal Cord/virology ; beta-Endorphin/biosynthesis/cerebrospinal fluid/*genetics
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    The tyrosine kinase negative regulator c-Cbl as a RING-type, E2-dependent ubiquitin-protein ligase (1999)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1999-10-09
    Description: Ubiquitination of receptor protein-tyrosine kinases (RPTKs) terminates signaling by marking active receptors for degradation. c-Cbl, an adapter protein for RPTKs, positively regulates RPTK ubiquitination in a manner dependent on its variant SRC homology 2 (SH2) and RING finger domains. Ubiquitin-protein ligases (or E3s) are the components of ubiquitination pathways that recognize target substrates and promote their ligation to ubiquitin. The c-Cbl protein acted as an E3 that can recognize tyrosine-phosphorylated substrates, such as the activated platelet-derived growth factor receptor, through its SH2 domain and that recruits and allosterically activates an E2 ubiquitin-conjugating enzyme through its RING domain. These results reveal an SH2-containing protein that functions as a ubiquitin-protein ligase and thus provide a distinct mechanism for substrate targeting in the ubiquitin system.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Joazeiro, C A -- Wing, S S -- Huang, H -- Leverson, J D -- Hunter, T -- Liu, Y C -- CA39780/CA/NCI NIH HHS/ -- R01 DK56558/DK/NIDDK NIH HHS/ -- T32CA09523/CA/NCI NIH HHS/ -- etc. -- New York, N.Y. -- Science. 1999 Oct 8;286(5438):309-12.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉The Salk Institute, Molecular Biology and Virology Laboratory, La Jolla, CA 92037, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/10514377" target="_blank"〉PubMed〈/a〉
    Keywords: Amino Acid Sequence ; Cell Line ; Humans ; Ligases/chemistry/*metabolism ; Molecular Sequence Data ; Phosphotyrosine/metabolism ; Point Mutation ; Proto-Oncogene Proteins/chemistry/genetics/*metabolism ; Proto-Oncogene Proteins c-cbl ; Receptor Protein-Tyrosine Kinases/*metabolism ; Receptor, Platelet-Derived Growth Factor beta/metabolism ; Recombinant Fusion Proteins/metabolism ; Sequence Alignment ; Signal Transduction ; *Ubiquitin-Conjugating Enzymes ; Ubiquitin-Protein Ligases ; Ubiquitins/*metabolism ; src Homology Domains
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    Importance of AMPA receptors for hippocampal synaptic plasticity but not for spatial learning (1999)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1999-06-12
    Description: Gene-targeted mice lacking the L-alpha-amino-3-hydroxy-5-methylisoxazole-4-propionate (AMPA) receptor subunit GluR-A exhibited normal development, life expectancy, and fine structure of neuronal dendrites and synapses. In hippocampal CA1 pyramidal neurons, GluR-A-/- mice showed a reduction in functional AMPA receptors, with the remaining receptors preferentially targeted to synapses. Thus, the CA1 soma-patch currents were strongly reduced, but glutamatergic synaptic currents were unaltered; and evoked dendritic and spinous Ca2+ transients, Ca2+-dependent gene activation, and hippocampal field potentials were as in the wild type. In adult GluR-A-/- mice, associative long-term potentiation (LTP) was absent in CA3 to CA1 synapses, but spatial learning in the water maze was not impaired. The results suggest that CA1 hippocampal LTP is controlled by the number or subunit composition of AMPA receptors and show a dichotomy between LTP in CA1 and acquisition of spatial memory.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Zamanillo, D -- Sprengel, R -- Hvalby, O -- Jensen, V -- Burnashev, N -- Rozov, A -- Kaiser, K M -- Koster, H J -- Borchardt, T -- Worley, P -- Lubke, J -- Frotscher, M -- Kelly, P H -- Sommer, B -- Andersen, P -- Seeburg, P H -- Sakmann, B -- New York, N.Y. -- Science. 1999 Jun 11;284(5421):1805-11.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Molecular Neuroscience, Max-Planck Institute for Medical Research, Jahnstrasse 29, 69120 Heidelberg, Germany.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/10364547" target="_blank"〉PubMed〈/a〉
    Keywords: Action Potentials ; Animals ; Bicuculline/pharmacology ; Calcium/metabolism ; Dendrites/physiology/ultrastructure ; GABA Antagonists/pharmacology ; Gene Expression ; Gene Targeting ; Genes, Immediate-Early ; Glutamic Acid/pharmacology/physiology ; Hippocampus/cytology/physiology ; Long-Term Potentiation/*physiology ; *Maze Learning ; Mice ; Mice, Inbred C57BL ; Pyramidal Cells/*physiology/ultrastructure ; Receptors, AMPA/genetics/*physiology ; Receptors, N-Methyl-D-Aspartate/physiology ; Synapses/*physiology/ultrastructure ; Synaptic Transmission
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    Dependence of human stem cell engraftment and repopulation of NOD/SCID mice on CXCR4 (1999)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1999-02-05
    Description: Stem cell homing and repopulation are not well understood. The chemokine stromal cell-derived factor-1 (SDF-1) and its receptor CXCR4 were found to be critical for murine bone marrow engraftment by human severe combined immunodeficient (SCID) repopulating stem cells. Treatment of human cells with antibodies to CXCR4 prevented engraftment. In vitro CXCR4-dependent migration to SDF-1 of CD34+CD38-/low cells correlated with in vivo engraftment and stem cell function. Stem cell factor and interleukin-6 induced CXCR4 expression on CD34+ cells, which potentiated migration to SDF-1 and engraftment in primary and secondary transplanted mice. Thus, up-regulation of CXCR4 expression may be useful for improving engraftment of repopulating stem cells in clinical transplantation.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Peled, A -- Petit, I -- Kollet, O -- Magid, M -- Ponomaryov, T -- Byk, T -- Nagler, A -- Ben-Hur, H -- Many, A -- Shultz, L -- Lider, O -- Alon, R -- Zipori, D -- Lapidot, T -- A130389/PHS HHS/ -- New York, N.Y. -- Science. 1999 Feb 5;283(5403):845-8.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Immunology, The Weizmann Institute of Science, Rehovot 76100, Israel.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/9933168" target="_blank"〉PubMed〈/a〉
    Keywords: ADP-ribosyl Cyclase ; Animals ; Antibodies ; *Antigens, CD ; Antigens, CD34/analysis/immunology ; Antigens, CD38 ; Antigens, Differentiation/analysis ; Chemokine CXCL12 ; Chemokines, CXC/pharmacology/*physiology ; Chemotaxis ; Colony-Forming Units Assay ; Fetal Blood ; Hematopoietic Stem Cell Mobilization ; *Hematopoietic Stem Cell Transplantation ; Hematopoietic Stem Cells/*physiology ; Humans ; Interleukin-6/pharmacology ; Membrane Glycoproteins ; Mice ; Mice, Inbred NOD ; Mice, Knockout ; Mice, SCID ; NAD+ Nucleosidase/analysis ; Receptors, CXCR4/biosynthesis/immunology/*physiology ; Stem Cell Factor/pharmacology ; Tetradecanoylphorbol Acetate/pharmacology ; Up-Regulation
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    Nota bene: medicine. Fear of flying! (1999)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1999-04-24
    Description: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Smith, O -- New York, N.Y. -- Science. 1999 Apr 2;284(5411):61.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/10215531" target="_blank"〉PubMed〈/a〉
    Keywords: 2S Albumins, Plant ; Allergens/genetics/*immunology ; Anaphylaxis/*prevention & control/therapy ; Animals ; Antigens, Plant ; Arachis/*adverse effects/immunology ; Food Hypersensitivity/*prevention & control/therapy ; Glycoproteins/genetics/*immunology ; Humans ; Immunoglobulin A/blood ; Immunoglobulin E/blood ; Mice ; Plant Proteins ; T-Lymphocytes, Helper-Inducer/immunology ; *Vaccines, DNA/therapeutic use
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    Cancer research. A new way to combat therapy side effects (1999)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1999-10-16
    Description: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Ferber, D -- New York, N.Y. -- Science. 1999 Sep 10;285(5434):1651, 1653.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/10523177" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Antineoplastic Agents/*adverse effects ; Apoptosis/*drug effects ; Benzothiazoles ; Cell Division/drug effects/radiation effects ; Cells, Cultured ; Drug Evaluation, Preclinical ; Gamma Rays/*adverse effects ; Humans ; Mice ; Neoplasms/drug therapy/radiotherapy/*therapy ; Radiation Dosage ; Radiation Tolerance/*drug effects ; Thiazoles/*pharmacology ; Toluene/*analogs & derivatives/pharmacology ; Tumor Suppressor Protein p53/*antagonists & inhibitors/physiology
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    Signaling of cell fate decisions by CLAVATA3 in Arabidopsis shoot meristems (1999)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1999-03-19
    Description: In higher plants, organogenesis occurs continuously from self-renewing apical meristems. Arabidopsis thaliana plants with loss-of-function mutations in the CLAVATA (CLV1, 2, and 3) genes have enlarged meristems and generate extra floral organs. Genetic analysis indicates that CLV1, which encodes a receptor kinase, acts with CLV3 to control the balance between meristem cell proliferation and differentiation. CLV3 encodes a small, predicted extracellular protein. CLV3 acts nonautonomously in meristems and is expressed at the meristem surface overlying the CLV1 domain. These proteins may act as a ligand-receptor pair in a signal transduction pathway, coordinating growth between adjacent meristematic regions.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Fletcher, J C -- Brand, U -- Running, M P -- Simon, R -- Meyerowitz, E M -- New York, N.Y. -- Science. 1999 Mar 19;283(5409):1911-4.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉California Institute of Technology, 1200 East California Boulevard, Pasadena, CA 91125, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/10082464" target="_blank"〉PubMed〈/a〉
    Keywords: Amino Acid Sequence ; Arabidopsis/*cytology/genetics/growth & development/metabolism ; *Arabidopsis Proteins ; Cell Differentiation ; Cell Division ; Cloning, Molecular ; Gene Expression Regulation, Plant ; Genes, Plant ; In Situ Hybridization ; Ligands ; Meristem/*cytology/growth & development/metabolism ; Molecular Sequence Data ; Mutation ; Phenotype ; Plant Proteins/chemistry/genetics/*metabolism ; Plant Shoots/cytology ; RNA, Messenger/genetics/metabolism ; RNA, Plant/genetics/metabolism ; Receptor Protein-Tyrosine Kinases/genetics/metabolism ; Recombinant Fusion Proteins/metabolism ; *Signal Transduction
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    A nucleoside transporter from Trypanosoma brucei involved in drug resistance (1999)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1999-07-10
    Description: Drug resistance of pathogens is an increasing problem whose underlying mechanisms are not fully understood. Cellular uptake of the major drugs against Trypanosoma brucei spp., the causative agents of sleeping sickness, is thought to occur through an unusual, so far unidentified adenosine transporter. Saccharomyces cerevisiae was used in a functional screen to clone a gene (TbAT1) from Trypanosoma brucei brucei that encodes a nucleoside transporter. When expressed in yeast, TbAT1 enabled adenosine uptake and conferred susceptibility to melaminophenyl arsenicals. Drug-resistant trypanosomes harbor a defective TbAT1 variant. The molecular identification of the entry route of trypanocides opens the way to approaches for diagnosis and treatment of drug-resistant sleeping sickness.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Maser, P -- Sutterlin, C -- Kralli, A -- Kaminsky, R -- New York, N.Y. -- Science. 1999 Jul 9;285(5425):242-4.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Swiss Tropical Institute, CH-4002 Basel, Switzerland. Biozentrum, University of Basel, CH-4056 Basel, Switzerland.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/10398598" target="_blank"〉PubMed〈/a〉
    Keywords: Adenosine/*metabolism ; Amino Acid Sequence ; Animals ; Arsenicals/metabolism/pharmacology ; Biological Transport ; Carrier Proteins/chemistry/genetics/*metabolism ; Cloning, Molecular ; Drug Resistance/genetics ; Genes, Protozoan ; Membrane Proteins/chemistry/genetics/*metabolism ; Molecular Sequence Data ; Mutation ; Nucleoside Transport Proteins ; Nucleosides/metabolism ; Purines/metabolism/pharmacology ; Saccharomyces cerevisiae/genetics ; Substrate Specificity ; Trypanocidal Agents/metabolism/*pharmacology ; Trypanosoma brucei brucei/*drug effects/genetics/*metabolism ; Trypanosomiasis, African/drug therapy/parasitology
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    Apaf-1 and caspase-9 in p53-dependent apoptosis and tumor inhibition (1999)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1999-04-02
    Description: The ability of p53 to promote apoptosis in response to mitogenic oncogenes appears to be critical for its tumor suppressor function. Caspase-9 and its cofactor Apaf-1 were found to be essential downstream components of p53 in Myc-induced apoptosis. Like p53 null cells, mouse embryo fibroblast cells deficient in Apaf-1 and caspase-9, and expressing c-Myc, were resistant to apoptotic stimuli that mimic conditions in developing tumors. Inactivation of Apaf-1 or caspase-9 substituted for p53 loss in promoting the oncogenic transformation of Myc-expressing cells. These results imply a role for Apaf-1 and caspase-9 in controlling tumor development.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Soengas, M S -- Alarcon, R M -- Yoshida, H -- Giaccia, A J -- Hakem, R -- Mak, T W -- Lowe, S W -- CA13106/CA/NCI NIH HHS/ -- CA64489/CA/NCI NIH HHS/ -- New York, N.Y. -- Science. 1999 Apr 2;284(5411):156-9.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Cold Spring Harbor Laboratory, Cold Spring Harbor, NY 11724, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/10102818" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; *Apoptosis ; Apoptotic Protease-Activating Factor 1 ; Caspase 9 ; Caspases/genetics/*physiology ; Cell Division ; Cell Transformation, Neoplastic ; Cells, Cultured ; Cytochrome c Group/metabolism ; Genes, myc ; *Genes, p53 ; Genes, ras ; Mice ; Mice, Nude ; Mitochondria/metabolism ; Mutation ; Neoplasms, Experimental/genetics/metabolism/*pathology ; Proteins/genetics/*physiology ; Tumor Suppressor Protein p53/metabolism
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    Putting stem cells to work (1999)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1999-04-17
    Description: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Solter, D -- Gearhart, J -- New York, N.Y. -- Science. 1999 Mar 5;283(5407):1468-70.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Developmental Biology, Max Planck Institute of Immunology, Freiburg, Germany. solter@immunbio.mpg.de〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/10206877" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Bioethics ; Blastocyst/*cytology ; *Cell Differentiation ; Cell Line ; Cells, Cultured ; Cloning, Organism ; Cytoplasm/physiology ; Embryo, Mammalian/cytology ; Humans ; Mice ; Nuclear Transfer Techniques ; Stem Cells/*cytology
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    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
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    A cyclic antimicrobial peptide produced in primate leukocytes by the ligation of two truncated alpha-defensins (1999)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1999-10-16
    Description: Analysis of rhesus macaque leukocytes disclosed the presence of an 18-residue macrocyclic, tridisulfide antibiotic peptide in granules of neutrophils and monocytes. The peptide, termed rhesus theta defensin-1 (RTD-1), is microbicidal for bacteria and fungi at low micromolar concentrations. Antibacterial activity of the cyclic peptide was threefold greater than that of an open-chain analog, and the cyclic conformation was required for antimicrobial activity in the presence of 150 millimolar sodium chloride. Biosynthesis of RTD-1 involves the head-to-tail ligation of two alpha-defensin-related nonapeptides, requiring the formation of two new peptide bonds. Thus, host defense cells possess mechanisms for synthesis and granular packaging of macrocyclic antibiotic peptides that are components of the phagocyte antimicrobial armamentarium.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Tang, Y Q -- Yuan, J -- Osapay, G -- Osapay, K -- Tran, D -- Miller, C J -- Ouellette, A J -- Selsted, M E -- AI22931/AI/NIAID NIH HHS/ -- DK33506/DK/NIDDK NIH HHS/ -- DK44632/DK/NIDDK NIH HHS/ -- etc. -- New York, N.Y. -- Science. 1999 Oct 15;286(5439):498-502.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Pathology, College of Medicine, University of California, Irvine, CA 92697, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/10521339" target="_blank"〉PubMed〈/a〉
    Keywords: Amino Acid Sequence ; Animals ; Anti-Bacterial Agents ; Anti-Infective Agents/chemistry/*metabolism/pharmacology ; Bacteria/drug effects ; Cloning, Molecular ; Defensins ; Disulfides/chemistry ; Fungi/drug effects ; Humans ; Leukopoiesis ; Macaca mulatta ; Molecular Sequence Data ; Monocytes/*metabolism ; Neutrophils/*metabolism ; Oligopeptides/chemistry/genetics/metabolism ; Osmolar Concentration ; Peptides, Cyclic/*biosynthesis/chemistry/genetics/pharmacology ; *Protein Biosynthesis ; Protein Conformation ; Protein Precursors/chemistry/genetics/metabolism ; Protein Processing, Post-Translational ; Proteins/chemistry/genetics/pharmacology
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    Testing the genetics of behavior in mice (1999)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1999-10-16
    Description: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Tordoff, M G -- Bachmanov, A A -- Friedman, M I -- Beauchamp, G K -- R01 DC000882/DC/NIDCD NIH HHS/ -- New York, N.Y. -- Science. 1999 Sep 24;285(5436):2069; author reply 2069-70.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/10523203" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Animals, Laboratory ; *Behavior, Animal ; *Diet ; Mice
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    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
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    New clues to how proteins link up to run the cell (1999)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1999-03-20
    Description: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Barinaga, M -- New York, N.Y. -- Science. 1999 Feb 26;283(5406):1247, 1249.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/10084927" target="_blank"〉PubMed〈/a〉
    Keywords: 14-3-3 Proteins ; Amino Acid Sequence ; Cell Cycle Proteins/metabolism ; Cell Nucleus/metabolism ; *Conserved Sequence ; Mitosis ; Peptidylprolyl Isomerase/metabolism ; Phosphoprotein Phosphatases/metabolism ; Phosphoproteins/chemistry/*metabolism ; Phosphorylation ; Phosphoserine/*metabolism ; Phosphotyrosine/metabolism ; Protein Binding ; Proteins/*chemistry/*metabolism ; *Tyrosine 3-Monooxygenase ; cdc25 Phosphatases
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    Planting the seeds of new antimalarial drugs (1999)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1999-09-25
    Description: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Ridley, R G -- New York, N.Y. -- Science. 1999 Sep 3;285(5433):1502-3.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Drug Discovery Research and the New Medicines for Malaria Venture, Special Programme for Research and Training in Tropical Diseases, World Health Organization, Geneva, Switzerland.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/10498534" target="_blank"〉PubMed〈/a〉
    Keywords: Aldose-Ketose Isomerases/*antagonists & inhibitors/genetics/metabolism ; Animals ; Antimalarials/pharmacokinetics/*pharmacology ; Drug Design ; Enzyme Inhibitors/pharmacology ; Fosfomycin/analogs & derivatives/pharmacokinetics/pharmacology ; *Hemiterpenes ; Humans ; Malaria/*drug therapy/parasitology ; Malaria, Falciparum/drug therapy ; Mice ; Multienzyme Complexes/*antagonists & inhibitors/genetics/metabolism ; Organelles/drug effects/metabolism ; Organophosphorus Compounds/metabolism ; Oxidoreductases/*antagonists & inhibitors/genetics/metabolism ; Plasmodium falciparum/*drug effects/metabolism ; Steroids/metabolism ; Transferases/antagonists & inhibitors/genetics/metabolism
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    Requirement for diverse, low-abundance peptides in positive selection of T cells (1999)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1999-01-05
    Description: Whether a single major histocompatibility complex (MHC)-bound peptide can drive the positive selection of large numbers of T cells has been a controversial issue. A diverse population of self peptides was shown to be essential for the in vivo development of CD4 T cells. Mice in which all but 5 percent of MHC class II molecules were bound by a single peptide had wild-type numbers of CD4 T cells. However, when the diversity within this 5 percent was lost, CD4 T cell development was impaired. Blocking the major peptide-MHC complex in thymus organ culture had no effect on T cell development, indicating that positive selection occurred on the diverse peptides present at low levels. This requirement for peptide diversity indicates that the interaction between self peptides and T cell receptors during positive selection is highly specific.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Barton, G M -- Rudensky, A Y -- New York, N.Y. -- Science. 1999 Jan 1;283(5398):67-70.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Molecular and Cellular Biology Program of the University of Washington and Fred Hutchinson Cancer Research Center, Seattle, WA 98195, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/9872742" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Antigen Presentation ; CD4-Positive T-Lymphocytes/cytology/*immunology/metabolism ; CD8-Positive T-Lymphocytes/cytology/immunology/metabolism ; Cells, Cultured ; Histocompatibility Antigens Class II/*immunology/metabolism ; Lymphocyte Activation ; Lymphocyte Culture Test, Mixed ; Mice ; Mice, Knockout ; Mice, Transgenic ; Peptides/*immunology/metabolism ; Receptors, Antigen, T-Cell/*immunology ; Recombinant Fusion Proteins/metabolism ; Spleen/immunology ; Thymus Gland/immunology
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    Structural basis of Smad2 recognition by the Smad anchor for receptor activation (1999)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1999-12-30
    Description: The Smad proteins mediate transforming growth factor-beta (TGFbeta) signaling from the transmembrane serine-threonine receptor kinases to the nucleus. The Smad anchor for receptor activation (SARA) recruits Smad2 to the TGFbeta receptors for phosphorylation. The crystal structure of a Smad2 MH2 domain in complex with the Smad-binding domain (SBD) of SARA has been determined at 2.2 angstrom resolution. SARA SBD, in an extended conformation comprising a rigid coil, an alpha helix, and a beta strand, interacts with the beta sheet and the three-helix bundle of Smad2. Recognition between the SARA rigid coil and the Smad2 beta sheet is essential for specificity, whereas interactions between the SARA beta strand and the Smad2 three-helix bundle contribute significantly to binding affinity. Comparison of the structures between Smad2 and a comediator Smad suggests a model for how receptor-regulated Smads are recognized by the type I receptors.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Wu, G -- Chen, Y G -- Ozdamar, B -- Gyuricza, C A -- Chong, P A -- Wrana, J L -- Massague, J -- Shi, Y -- CA85171/CA/NCI NIH HHS/ -- New York, N.Y. -- Science. 2000 Jan 7;287(5450):92-7.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Molecular Biology, Princeton University, Lewis Thomas Laboratory, Princeton, NJ 08544, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/10615055" target="_blank"〉PubMed〈/a〉
    Keywords: *Activin Receptors, Type I ; Amino Acid Sequence ; Binding Sites ; Carrier Proteins/*chemistry/*metabolism ; Crystallography, X-Ray ; DNA-Binding Proteins/*chemistry/genetics/*metabolism ; Hydrogen Bonding ; Models, Molecular ; Molecular Sequence Data ; Mutation ; Phosphorylation ; Point Mutation ; Protein Conformation ; Protein Structure, Secondary ; Protein Structure, Tertiary ; Protein-Serine-Threonine Kinases/chemistry/genetics/metabolism ; Receptors, Transforming Growth Factor beta/chemistry/genetics/metabolism ; Recombinant Fusion Proteins/chemistry/metabolism ; Signal Transduction ; Smad2 Protein ; Trans-Activators/*chemistry/genetics/*metabolism ; Zinc Fingers
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    Brain transplants? (1999)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1999-01-16
    Description: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Sikorski, R -- Peters, R -- New York, N.Y. -- Science. 1998 Dec 18;282(5397):2213.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/9890829" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; *Brain Tissue Transplantation ; Cell Differentiation ; Cell Line ; Cell Movement ; Cerebellum/cytology ; Cerebral Ventricles/cytology/embryology ; *Fetal Tissue Transplantation ; Humans ; Mice ; Neuroglia/cytology ; Neurons/cytology ; *Stem Cell Transplantation ; Stem Cells/cytology/enzymology ; beta-N-Acetylhexosaminidases/genetics
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    New insights into cystic fibrosis ion channel (1999)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1999-11-30
    Description: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Hagmann, M -- New York, N.Y. -- Science. 1999 Oct 15;286(5439):388-9.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/10577195" target="_blank"〉PubMed〈/a〉
    Keywords: Adenosine Triphosphate/metabolism ; Amino Acid Sequence ; Animals ; Antigens, Surface/metabolism ; Cell Membrane/metabolism ; Chlorides/metabolism ; Cystic Fibrosis Transmembrane Conductance ; Regulator/chemistry/genetics/*metabolism ; Humans ; *Ion Channel Gating ; Models, Biological ; Mutagenesis ; Nerve Tissue Proteins/metabolism ; Syntaxin 1 ; Xenopus
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    Unresponsiveness to cannabinoids and reduced addictive effects of opiates in CB1 receptor knockout mice (1999)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1999-01-15
    Description: The function of the central cannabinoid receptor (CB1) was investigated by invalidating its gene. Mutant mice did not respond to cannabinoid drugs, demonstrating the exclusive role of the CB1 receptor in mediating analgesia, reinforcement, hypothermia, hypolocomotion, and hypotension. The acute effects of opiates were unaffected, but the reinforcing properties of morphine and the severity of the withdrawal syndrome were strongly reduced. These observations suggest that the CB1 receptor is involved in the motivational properties of opiates and in the development of physical dependence and extend the concept of an interconnected role of CB1 and opiate receptors in the brain areas mediating addictive behavior.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Ledent, C -- Valverde, O -- Cossu, G -- Petitet, F -- Aubert, J F -- Beslot, F -- Bohme, G A -- Imperato, A -- Pedrazzini, T -- Roques, B P -- Vassart, G -- Fratta, W -- Parmentier, M -- New York, N.Y. -- Science. 1999 Jan 15;283(5400):401-4.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉IRIBHN, Universite libre de Bruxelles, B-1070 Brussels, Belgium.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/9888857" target="_blank"〉PubMed〈/a〉
    Keywords: Analgesics, Opioid/pharmacology ; Animals ; Behavior, Animal/drug effects ; Blood Pressure/drug effects ; Body Temperature/drug effects ; Cannabinoids/metabolism/*pharmacology ; Dronabinol/*pharmacology ; Heart Rate/drug effects ; Mice ; Mice, Knockout ; Morphine/pharmacology ; Motor Activity/drug effects ; Narcotics/*pharmacology ; Opioid-Related Disorders/*physiopathology ; Pain Threshold/drug effects ; Receptors, Cannabinoid ; Receptors, Drug/genetics/*physiology ; Receptors, Opioid, kappa/agonists/physiology ; Reinforcement (Psychology) ; Substance Withdrawal Syndrome/physiopathology
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    Genetics of mouse behavior: interactions with laboratory environment (1999)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1999-06-05
    Description: Strains of mice that show characteristic patterns of behavior are critical for research in neurobehavioral genetics. Possible confounding influences of the laboratory environment were studied in several inbred strains and one null mutant by simultaneous testing in three laboratories on a battery of six behaviors. Apparatus, test protocols, and many environmental variables were rigorously equated. Strains differed markedly in all behaviors, and despite standardization, there were systematic differences in behavior across labs. For some tests, the magnitude of genetic differences depended upon the specific testing lab. Thus, experiments characterizing mutants may yield results that are idiosyncratic to a particular laboratory.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Crabbe, J C -- Wahlsten, D -- Dudek, B C -- AA00170/AA/NIAAA NIH HHS/ -- AA10760/AA/NIAAA NIH HHS/ -- DA10731/DA/NIDA NIH HHS/ -- New York, N.Y. -- Science. 1999 Jun 4;284(5420):1670-2.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Portland Alcohol Research Center, Department of Veterans Affairs Medical Center, Portland, OR 97201, USA. crabbe@ohsu.edu〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/10356397" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Animals, Laboratory/genetics ; Anxiety ; *Behavior, Animal ; Confounding Factors (Epidemiology) ; Drinking Behavior ; *Environment ; Female ; Genetics, Behavioral/*methods ; Genotype ; Male ; Mice ; Mice, Inbred Strains/genetics ; Mice, Mutant Strains/genetics ; Motor Activity ; Psychological Tests ; Reproducibility of Results
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    Gene expression profile of aging and its retardation by caloric restriction (1999)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1999-08-28
    Description: The gene expression profile of the aging process was analyzed in skeletal muscle of mice. Use of high-density oligonucleotide arrays representing 6347 genes revealed that aging resulted in a differential gene expression pattern indicative of a marked stress response and lower expression of metabolic and biosynthetic genes. Most alterations were either completely or partially prevented by caloric restriction, the only intervention known to retard aging in mammals. Transcriptional patterns of calorie-restricted animals suggest that caloric restriction retards the aging process by causing a metabolic shift toward increased protein turnover and decreased macromolecular damage.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Lee, C K -- Klopp, R G -- Weindruch, R -- Prolla, T A -- P01 AG11915/AG/NIA NIH HHS/ -- R01 CA78723/CA/NCI NIH HHS/ -- New York, N.Y. -- Science. 1999 Aug 27;285(5432):1390-3.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Environmental Toxicology Center, Institute on Aging, Department of Genetics, University of Wisconsin, Madison, WI 53706, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/10464095" target="_blank"〉PubMed〈/a〉
    Keywords: Aging/*genetics ; Animals ; DNA Damage/genetics ; DNA Repair/genetics ; *Diet ; *Energy Intake ; Energy Metabolism/genetics ; *Gene Expression Regulation ; Male ; Mice ; Mice, Inbred C57BL ; Mitochondria, Muscle/metabolism ; Muscle, Skeletal/innervation/*metabolism ; Oligonucleotide Array Sequence Analysis ; Oxidative Stress/genetics ; Proteins/metabolism ; RNA, Messenger/genetics/metabolism
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    First components found for new kidney filter (1999)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1999-11-30
    Description: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Wickelgren, I -- New York, N.Y. -- Science. 1999 Oct 8;286(5438):225-6.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/10577188" target="_blank"〉PubMed〈/a〉
    Keywords: Adaptor Proteins, Signal Transducing ; Animals ; Cells, Cultured ; Chromosomes, Human, Pair 19/genetics ; Cytoskeletal Proteins ; Humans ; Intercellular Junctions/metabolism/ultrastructure ; Kidney Glomerulus/blood supply/chemistry/*metabolism/*ultrastructure ; Membrane Proteins ; Mice ; Mice, Knockout ; Microscopy, Electron ; Mutation ; Nephrotic Syndrome/congenital/genetics/pathology ; Proteins/chemistry/genetics/*metabolism
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    Contact-dependent inhibition of cortical neurite growth mediated by notch signaling (1999)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1999-10-26
    Description: The exuberant growth of neurites during development becomes markedly reduced as cortical neurons mature. In vitro studies of neurons from mouse cerebral cortex revealed that contact-mediated Notch signaling regulates the capacity of neurons to extend and elaborate neurites. Up-regulation of Notch activity was concomitant with an increase in the number of interneuronal contacts and cessation of neurite growth. In neurons with low Notch activity, which readily extend neurites, up-regulation of Notch activity either inhibited extension or caused retraction of neurites. Conversely, in more mature neurons that had ceased their growth after establishing numerous connections and displayed high Notch activity, inhibition of Notch signaling promoted neurite extension. Thus, the formation of neuronal contacts results in activation of Notch receptors, leading to restriction of neuronal growth and a subsequent arrest in maturity.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Sestan, N -- Artavanis-Tsakonas, S -- Rakic, P -- NS14841/NS/NINDS NIH HHS/ -- NS26084/NS/NINDS NIH HHS/ -- New York, N.Y. -- Science. 1999 Oct 22;286(5440):741-6.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Section of Neurobiology, Yale University School of Medicine, New Haven, CT 06510, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/10531053" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; *Cell Communication ; Cell Count ; Cell Differentiation ; Cell Movement ; Cell Nucleus/metabolism ; Cell Size ; Cells, Cultured ; Cerebral Cortex/*cytology/embryology ; Contact Inhibition ; Humans ; Ligands ; Membrane Proteins/*metabolism ; Mice ; Mitosis ; Neurites/chemistry/*physiology ; Neurons/*cytology/metabolism ; Protein Structure, Tertiary ; Receptor, Notch1 ; Receptor, Notch2 ; Receptors, Cell Surface/*metabolism ; Signal Transduction ; *Transcription Factors ; Transcriptional Activation ; Up-Regulation
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    Crystal structure of the ectodomain of human transferrin receptor (1999)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1999-10-26
    Description: The transferrin receptor (TfR) undergoes multiple rounds of clathrin-mediated endocytosis and reemergence at the cell surface, importing iron-loaded transferrin (Tf) and recycling apotransferrin after discharge of iron in the endosome. The crystal structure of the dimeric ectodomain of the human TfR, determined here to 3.2 angstroms resolution, reveals a three-domain subunit. One domain closely resembles carboxy- and aminopeptidases, and features of membrane glutamate carboxypeptidase can be deduced from the TfR structure. A model is proposed for Tf binding to the receptor.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Lawrence, C M -- Ray, S -- Babyonyshev, M -- Galluser, R -- Borhani, D W -- Harrison, S C -- New York, N.Y. -- Science. 1999 Oct 22;286(5440):779-82.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Howard Hughes Medical Institute and Children's Hospital Laboratory of Molecular Medicine, 320 Longwood Avenue, Boston, MA 02115, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/10531064" target="_blank"〉PubMed〈/a〉
    Keywords: Amino Acid Sequence ; Animals ; CHO Cells ; Carboxypeptidases/chemistry ; Cell Membrane/chemistry ; Conserved Sequence ; Cricetinae ; Crystallography, X-Ray ; Dimerization ; Ferric Compounds/metabolism ; Glycosylation ; Humans ; Hydrogen-Ion Concentration ; Models, Molecular ; Molecular Sequence Data ; Protein Conformation ; Protein Structure, Secondary ; Protein Structure, Tertiary ; Receptors, Transferrin/*chemistry/metabolism ; Transferrin/metabolism
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    Genetic selection of peptide inhibitors of biological pathways (1999)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1999-07-27
    Description: Genetic selections were used to find peptides that inhibit biological pathways in budding yeast. The peptides were presented inside cells as peptamers, surface loops on a highly expressed and biologically inert carrier protein, a catalytically inactive derivative of staphylococcal nuclease. Peptamers that inhibited the pheromone signaling pathway, transcriptional silencing, and the spindle checkpoint were isolated. Putative targets for the inhibitors were identified by a combination of two-hybrid analysis and genetic dissection of the target pathways. This analysis identified Ydr517w as a component of the spindle checkpoint and reinforced earlier indications that Ste50 has both positive and negative roles in pheromone signaling. Analysis of transcript arrays showed that the peptamers were highly specific in their effects, which suggests that they may be useful reagents in organisms that lack sophisticated genetics as well as for identifying components of existing biological pathways that are potential targets for drug discovery.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Norman, T C -- Smith, D L -- Sorger, P K -- Drees, B L -- O'Rourke, S M -- Hughes, T R -- Roberts, C J -- Friend, S H -- Fields, S -- Murray, A W -- P41-RR11823/RR/NCRR NIH HHS/ -- New York, N.Y. -- Science. 1999 Jul 23;285(5427):591-5.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Physiology, University of California, San Francisco, CA 94143-0444, USA. tnorman@microbia.com〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/10417390" target="_blank"〉PubMed〈/a〉
    Keywords: Amino Acid Sequence ; Calcium-Calmodulin-Dependent Protein Kinases/metabolism ; Fungal Proteins/metabolism ; G1 Phase ; Galactose/metabolism ; Lipoproteins/metabolism ; Micrococcal Nuclease ; Mitosis ; Molecular Sequence Data ; Peptide Library ; Peptides/genetics/metabolism/*pharmacology ; Pheromones/*metabolism ; Protein Binding ; Protein-Serine-Threonine Kinases ; Protein-Tyrosine Kinases ; Saccharomyces cerevisiae/cytology/genetics/*metabolism ; *Saccharomyces cerevisiae Proteins ; *Selection, Genetic ; *Signal Transduction ; Spindle Apparatus/drug effects/*metabolism ; Transcription, Genetic
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    Conserved structures of mediator and RNA polymerase II holoenzyme (1999)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1999-02-12
    Description: Single particles of the mediator of transcriptional regulation (Mediator) and of RNA polymerase II holoenzyme were revealed by electron microscopy and image processing. Mediator alone appeared compact, but at high pH or in the presence of RNA polymerase II it displayed an extended conformation. Holoenzyme contained Mediator in a fully extended state, partially enveloping the globular polymerase, with points of apparent contact in the vicinity of the polymerase carboxyl-terminal domain and the DNA-binding channel. A similarity in appearance and conformational behavior of yeast and murine complexes indicates a conservation of Mediator structure among eukaryotes.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Asturias, F J -- Jiang, Y W -- Myers, L C -- Gustafsson, C M -- Kornberg, R D -- AI21144/AI/NIAID NIH HHS/ -- GM36659/GM/NIGMS NIH HHS/ -- New York, N.Y. -- Science. 1999 Feb 12;283(5404):985-7.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Structural Biology, Fairchild Building, Stanford University School of Medicine, Stanford, CA 94305, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/9974391" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; DNA-Directed RNA Polymerases/*chemistry/metabolism ; Fungal Proteins/*chemistry/metabolism ; Holoenzymes/chemistry/metabolism ; Hydrogen-Ion Concentration ; Mice ; Microscopy, Electron ; *Protein Conformation ; Protein Folding ; Temperature ; Trans-Activators/*chemistry/metabolism ; Transcription Factors/*chemistry/metabolism
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    Perspectives: biomedicine. The benefits of recycling (1999)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1999-09-18
    Description: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Steel, K P -- New York, N.Y. -- Science. 1999 Aug 27;285(5432):1363-4.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Medical Research Council Institute of Hearing Research, University Park, Nottingham NG7 2RD, UK. karen@ihr.mrc.ac.uk〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/10490411" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Carrier Proteins/genetics/metabolism ; Cochlea/metabolism ; Cochlear Duct/*metabolism/ultrastructure ; *DNA-Binding Proteins ; Deafness/genetics/*metabolism/pathology ; Endolymph/metabolism ; Evoked Potentials, Auditory, Brain Stem ; Extracellular Matrix Proteins ; Eye Proteins/genetics/metabolism ; Genetic Linkage ; Hair Cells, Auditory/cytology/physiology ; Humans ; Ion Transport ; *Membrane Transport Proteins ; Mice ; Mutation ; Nerve Tissue Proteins/genetics/metabolism ; POU Domain Factors ; Potassium/*metabolism ; Potassium Channels/genetics/metabolism ; Proteins/genetics/metabolism ; Transcription Factors/genetics/*metabolism ; X Chromosome
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  • 83
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    Reconstitution of G1 cyclin ubiquitination with complexes containing SCFGrr1 and Rbx1 (1999)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1999-04-24
    Description: Control of cyclin levels is critical for proper cell cycle regulation. In yeast, the stability of the G1 cyclin Cln1 is controlled by phosphorylation-dependent ubiquitination. Here it is shown that this reaction can be reconstituted in vitro with an SCF E3 ubiquitin ligase complex. Phosphorylated Cln1 was ubiquitinated by SCF (Skp1-Cdc53-F-box protein) complexes containing the F-box protein Grr1, Rbx1, and the E2 Cdc34. Rbx1 promotes association of Cdc34 with Cdc53 and stimulates Cdc34 auto-ubiquitination in the context of Cdc53 or SCF complexes. Rbx1, which is also a component of the von Hippel-Lindau tumor suppressor complex, may define a previously unrecognized class of E3-associated proteins.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Skowyra, D -- Koepp, D M -- Kamura, T -- Conrad, M N -- Conaway, R C -- Conaway, J W -- Elledge, S J -- Harper, J W -- AG11085/AG/NIA NIH HHS/ -- GM41628/GM/NIGMS NIH HHS/ -- GM54137/GM/NIGMS NIH HHS/ -- New York, N.Y. -- Science. 1999 Apr 23;284(5414):662-5.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Verna and Marrs McLean Department of Biochemistry, 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/10213692" target="_blank"〉PubMed〈/a〉
    Keywords: Amino Acid Sequence ; Anaphase-Promoting Complex-Cyclosome ; Animals ; Carrier Proteins/chemistry/*metabolism ; Cell Cycle Proteins/metabolism ; Cell Line ; *Cullin Proteins ; Cyclins/*metabolism ; F-Box Proteins ; Fungal Proteins/*metabolism ; Ligases/metabolism ; Molecular Sequence Data ; Peptide Synthases/*metabolism ; Phosphorylation ; Recombinant Fusion Proteins/metabolism ; S-Phase Kinase-Associated Proteins ; SKP Cullin F-Box Protein Ligases ; Saccharomyces cerevisiae/metabolism ; *Saccharomyces cerevisiae Proteins ; Sequence Alignment ; Ubiquitin-Conjugating Enzymes ; *Ubiquitin-Protein Ligase Complexes ; Ubiquitin-Protein Ligases ; Ubiquitins/*metabolism
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    Evolutionarily conserved pathways of energetic connectivity in protein families (1999)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1999-10-09
    Description: For mapping energetic interactions in proteins, a technique was developed that uses evolutionary data for a protein family to measure statistical interactions between amino acid positions. For the PDZ domain family, this analysis predicted a set of energetically coupled positions for a binding site residue that includes unexpected long-range interactions. Mutational studies confirm these predictions, demonstrating that the statistical energy function is a good indicator of thermodynamic coupling in proteins. Sets of interacting residues form connected pathways through the protein fold that may be the basis for efficient energy conduction within proteins.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Lockless, S W -- Ranganathan, R -- New York, N.Y. -- Science. 1999 Oct 8;286(5438):295-9.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Howard Hughes Medical Institute and Department of Pharmacology, University of Texas Southwestern Medical Center, 5323 Harry Hines Boulevard, Dallas, TX 75235-9050, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/10514373" target="_blank"〉PubMed〈/a〉
    Keywords: Amino Acid Sequence ; Amino Acids/chemistry/metabolism ; Binding Sites ; Conserved Sequence ; *Evolution, Molecular ; Models, Molecular ; Mutation ; Probability ; Protein Binding ; Protein Conformation ; Protein Folding ; Protein Structure, Tertiary ; Proteins/*chemistry/*metabolism ; Recombinant Fusion Proteins/chemistry/metabolism ; Sequence Alignment ; Statistics as Topic ; Thermodynamics
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  • 85
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    Identification of a vertebrate sister-chromatid separation inhibitor involved in transformation and tumorigenesis (1999)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1999-07-20
    Description: A vertebrate securin (vSecurin) was identified on the basis of its biochemical analogy to the Pds1p protein of budding yeast and the Cut2p protein of fission yeast. The vSecurin protein bound to a vertebrate homolog of yeast separins Esp1p and Cut1p and was degraded by proteolysis mediated by an anaphase-promoting complex in a manner dependent on a destruction motif. Furthermore, expression of a stable Xenopus securin mutant protein blocked sister-chromatid separation but did not block the embryonic cell cycle. The vSecurin proteins share extensive sequence similarity with each other but show no sequence similarity to either of their yeast counterparts. Human securin is identical to the product of the gene called pituitary tumor-transforming gene (PTTG), which is overexpressed in some tumors and exhibits transforming activity in NIH 3T3 cells. The oncogenic nature of increased expression of vSecurin may result from chromosome gain or loss, produced by errors in chromatid separation.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Zou, H -- McGarry, T J -- Bernal, T -- Kirschner, M W -- GM26875/GM/NIGMS NIH HHS/ -- New York, N.Y. -- Science. 1999 Jul 16;285(5426):418-22.〈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/10411507" target="_blank"〉PubMed〈/a〉
    Keywords: 3T3 Cells ; Amino Acid Sequence ; *Anaphase ; Anaphase-Promoting Complex-Cyclosome ; Animals ; CDC2 Protein Kinase/metabolism ; Cell Cycle Proteins/chemistry/metabolism ; *Cell Transformation, Neoplastic ; Chromatids/*physiology ; Conserved Sequence ; Cyclin B/metabolism ; Cyclin B1 ; *Endopeptidases ; Fungal Proteins/chemistry/metabolism ; HeLa Cells ; Humans ; Ligases/metabolism ; Mice ; Molecular Sequence Data ; Mutagenesis, Site-Directed ; Neoplasm Proteins/chemistry/genetics/*metabolism ; Neoplasms/etiology ; Nuclear Proteins/chemistry/metabolism ; Oncogene Proteins/chemistry/genetics/*metabolism ; Oncogenes ; *Saccharomyces cerevisiae Proteins ; *Schizosaccharomyces pombe Proteins ; Securin ; Separase ; Spindle Apparatus/metabolism ; *Ubiquitin-Protein Ligase Complexes ; Ubiquitin-Protein Ligases ; Xenopus
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    Stem cells as potential nerve therapy (1999)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1999-08-24
    Description: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Steghaus-Kovac, S -- New York, N.Y. -- Science. 1999 Jul 30;285(5428):650-1.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/10454911" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Bioethics ; Diffuse Cerebral Sclerosis of Schilder/*therapy ; Embryo, Mammalian/cytology ; Financing, Government ; Germany ; Humans ; Mice ; Myelin Sheath/*physiology ; Oligodendroglia/*cytology/physiology/transplantation ; Rats ; Research Support as Topic ; Spinal Cord ; Stem Cells/*cytology/physiology
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    Xyloglucan fucosyltransferase, an enzyme involved in plant cell wall biosynthesis (1999)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1999-06-18
    Description: Cell walls are crucial for development, signal transduction, and disease resistance in plants. Cell walls are made of cellulose, hemicelluloses, and pectins. Xyloglucan (XG), the principal load-bearing hemicellulose of dicotyledonous plants, has a terminal fucosyl residue. A 60-kilodalton fucosyltransferase (FTase) that adds this residue was purified from pea epicotyls. Peptide sequence information from the pea FTase allowed the cloning of a homologous gene, AtFT1, from Arabidopsis. Antibodies raised against recombinant AtFTase immunoprecipitate FTase enzyme activity from solubilized Arabidopsis membrane proteins, and AtFT1 expressed in mammalian COS cells results in the presence of XG FTase activity in these cells.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Perrin, R M -- DeRocher, A E -- Bar-Peled, M -- Zeng, W -- Norambuena, L -- Orellana, A -- Raikhel, N V -- Keegstra, K -- New York, N.Y. -- Science. 1999 Jun 18;284(5422):1976-9.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Michigan State University-Department of Energy (MSU-DOE) Plant Research Laboratory, Michigan State University, East Lansing, MI 48824, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/10373113" target="_blank"〉PubMed〈/a〉
    Keywords: Amino Acid Sequence ; Animals ; Arabidopsis/*enzymology/genetics ; COS Cells ; Carbohydrate Conformation ; Cell Wall/*metabolism ; Cloning, Molecular ; DNA, Complementary ; Expressed Sequence Tags ; Fucosyltransferases/chemistry/genetics/isolation & purification/*metabolism ; Genes, Plant ; *Glucans ; Molecular Sequence Data ; Peas/*enzymology ; Polysaccharides/*biosynthesis/chemistry ; *Xylans
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    Gene may promise new route to potent vaccines (1999)
    American Association for the Advancement of Science (AAAS)
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    Publication Date: 1999-06-05
    Description: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Enserink, M -- New York, N.Y. -- Science. 1999 May 7;284(5416):883.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/10357664" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; *Bacterial Vaccines/immunology ; Gene Expression Regulation, Bacterial ; *Genes, Bacterial ; Mice ; Salmonella Infections, Animal/immunology/microbiology/*prevention & control ; Salmonella typhimurium/enzymology/*genetics/immunology/pathogenicity ; Site-Specific DNA-Methyltransferase (Adenine-Specific)/antagonists & ; inhibitors/*genetics/metabolism ; Vaccines, Attenuated ; Virulence/genetics
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  • 89
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    Structure of an E6AP-UbcH7 complex: insights into ubiquitination by the E2-E3 enzyme cascade (1999)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1999-11-13
    Description: The E6AP ubiquitin-protein ligase (E3) mediates the human papillomavirus-induced degradation of the p53 tumor suppressor in cervical cancer and is mutated in Angelman syndrome, a neurological disorder. The crystal structure of the catalytic hect domain of E6AP reveals a bilobal structure with a broad catalytic cleft at the junction of the two lobes. The cleft consists of conserved residues whose mutation interferes with ubiquitin-thioester bond formation and is the site of Angelman syndrome mutations. The crystal structure of the E6AP hect domain bound to the UbcH7 ubiquitin-conjugating enzyme (E2) reveals the determinants of E2-E3 specificity and provides insights into the transfer of ubiquitin from the E2 to the E3.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Huang, L -- Kinnucan, E -- Wang, G -- Beaudenon, S -- Howley, P M -- Huibregtse, J M -- Pavletich, N P -- New York, N.Y. -- Science. 1999 Nov 12;286(5443):1321-6.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Cellular Biochemistry and Biophysics Program, Howard Hughes Medical Institute, 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/10558980" target="_blank"〉PubMed〈/a〉
    Keywords: Amino Acid Sequence ; Angelman Syndrome/genetics ; Binding Sites ; Catalytic Domain ; Conserved Sequence ; Crystallography, X-Ray ; Cysteine/chemistry ; Humans ; Ligases/*chemistry/*metabolism ; Models, Molecular ; Molecular Sequence Data ; Mutation ; Protein Conformation ; Protein Structure, Secondary ; Substrate Specificity ; Ubiquitin-Conjugating Enzymes ; Ubiquitin-Protein Ligases ; Ubiquitins/*metabolism
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    Introducing proteins into the body's cells (1999)
    American Association for the Advancement of Science (AAAS)
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    Publication Date: 1999-09-25
    Description: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Strauss, E -- New York, N.Y. -- Science. 1999 Sep 3;285(5433):1466-7.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/10498525" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Cell Membrane/*metabolism ; Cells, Cultured ; Drug Carriers ; *Drug Delivery Systems ; Gene Products, tat/chemistry/*metabolism ; Humans ; Mice ; Protein Denaturation ; Protein Folding ; Recombinant Fusion Proteins/administration & dosage/chemistry/*metabolism ; beta-Galactosidase/administration & dosage/chemistry/*metabolism
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    Regulation of neurotrophin-3 expression by epithelial-mesenchymal interactions: the role of Wnt factors (1999)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1999-02-19
    Description: Neurotrophins regulate survival, axonal growth, and target innervation of sensory and other neurons. Neurotrophin-3 (NT-3) is expressed specifically in cells adjacent to extending axons of dorsal root ganglia neurons, and its absence results in loss of most of these neurons before their axons reach their targets. However, axons are not required for NT-3 expression in limbs; instead, local signals from ectoderm induce NT-3 expression in adjacent mesenchyme. Wnt factors expressed in limb ectoderm induce NT-3 in the underlying mesenchyme. Thus, epithelial-mesenchymal interactions mediated by Wnt factors control NT-3 expression and may regulate axonal growth and guidance.〈br /〉〈br /〉〈a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC2710127/" 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/PMC2710127/" target="_blank"〉This paper as free author manuscript - peer-reviewed and accepted for publication〈/a〉〈br /〉〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Patapoutian, A -- Backus, C -- Kispert, A -- Reichardt, L F -- MH48200/MH/NIMH NIH HHS/ -- P01 NS016033/NS/NINDS NIH HHS/ -- P01 NS016033-190014/NS/NINDS NIH HHS/ -- New York, N.Y. -- Science. 1999 Feb 19;283(5405):1180-3.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Physiology, Howard Hughes Medical Institute, University of California, San Francisco, CA 94143-0723, USA. ardem@itsa.ucsf.edu〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/10024246" target="_blank"〉PubMed〈/a〉
    Keywords: 3T3 Cells ; Animals ; Coculture Techniques ; Ectoderm/metabolism/*physiology ; Embryo, Mammalian/metabolism ; Epithelium/metabolism ; Extremities/embryology/innervation ; Ganglia, Spinal/physiology ; *Gene Expression Regulation, Developmental ; *Glycoproteins ; Mesoderm/*metabolism ; Mice ; Motor Neurons/physiology ; Nerve Growth Factors/biosynthesis/*genetics ; Neurons, Afferent/physiology ; Neurotrophin 3 ; Organ Culture Techniques ; Proto-Oncogene Proteins/*physiology ; Signal Transduction ; Wnt Proteins ; Wnt4 Protein
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    Electronic ISSN: 1095-9203
    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
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    Perspectives: molecular medicine. "Sickle cell anemia, a molecular disease" (1999)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1999-12-28
    Description: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Strasser, B J -- New York, N.Y. -- Science. 1999 Nov 19;286(5444):1488-90.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Louis-Jeantet Institute for the History of Medicine, University of Geneva, Geneva, Switzerland. bruno.strasser@medecine.unige.ch〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/10610548" target="_blank"〉PubMed〈/a〉
    Keywords: Amino Acid Sequence ; Anemia, Sickle Cell/blood/genetics/*history ; Blood Protein Electrophoresis ; Hemoglobin, Sickle/*chemistry/genetics ; Hemoglobins/chemistry/genetics ; History, 20th Century ; Humans ; Molecular Biology/*history ; Nobel Prize
    Print ISSN: 0036-8075
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    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
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  • 93
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    Effects of angiogenesis inhibitors on multistage carcinogenesis in mice (1999)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1999-04-30
    Description: Solid tumors depend on angiogenesis for their growth. In a transgenic mouse model of pancreatic islet cell carcinogenesis (RIP1-Tag2), an angiogenic switch occurs in premalignant lesions, and angiogenesis persists during progression to expansive solid tumors and invasive carcinomas. RIP1-Tag2 mice were treated so as to compare the effects of four angiogenesis inhibitors at three distinct stages of disease progression. AGM-1470, angiostatin, BB-94, and endostatin each produced distinct efficacy profiles in trials aimed at preventing the angiogenic switch in premalignant lesions, intervening in the rapid expansion of small tumors, or inducing the regression of large end-stage cancers. Thus, anti-angiogenic drugs may prove most efficacious when they are targeted to specific stages of cancer.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Bergers, G -- Javaherian, K -- Lo, K M -- Folkman, J -- Hanahan, D -- New York, N.Y. -- Science. 1999 Apr 30;284(5415):808-12.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Biochemistry and Biophysics and Hormone Research Institute, University of California, San Francisco, 513 Parnassus Ave, San Francisco, CA 94143-0534, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/10221914" target="_blank"〉PubMed〈/a〉
    Keywords: Angiostatins ; Animals ; Anticarcinogenic Agents/pharmacology ; Antineoplastic Agents/*pharmacology ; Apoptosis ; Carcinoma, Islet Cell/blood supply/*drug therapy/pathology/prevention & control ; Collagen/pharmacology ; Cyclohexanes ; Disease Progression ; Drug Evaluation, Preclinical ; Endostatins ; Female ; Male ; Mice ; Mice, Inbred C57BL ; Mice, Transgenic ; Neoplasm Staging ; Neovascularization, Pathologic/*prevention & control ; Pancreatic Neoplasms/blood supply/*drug therapy/pathology/prevention & control ; Peptide Fragments/pharmacology ; Phenylalanine/analogs & derivatives/pharmacology ; Plasminogen/pharmacology ; Sesquiterpenes/pharmacology ; Thiophenes/pharmacology
    Print ISSN: 0036-8075
    Electronic ISSN: 1095-9203
    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
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    Impaired immunoproteasome assembly and immune responses in PA28-/- mice (1999)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1999-12-11
    Description: In vitro PA28 binds and activates proteasomes. It is shown here that mice with a disrupted PA28b gene lack PA28a and PA28b polypeptides, demonstrating that PA28 functions as a hetero-oligomer in vivo. Processing of antigenic epitopes derived from exogenous or endogenous antigens is altered in PA28-/- mice. Cytotoxic T lymphocyte responses are impaired, and assembly of immunoproteasomes is greatly inhibited in mice lacking PA28. These results show that PA28 is necessary for immunoproteasome assembly and is required for efficient antigen processing, thus demonstrating the importance of PA28-mediated proteasome function in immune responses.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Preckel, T -- Fung-Leung, W P -- Cai, Z -- Vitiello, A -- Salter-Cid, L -- Winqvist, O -- Wolfe, T G -- Von Herrath, M -- Angulo, A -- Ghazal, P -- Lee, J D -- Fourie, A M -- Wu, Y -- Pang, J -- Ngo, K -- Peterson, P A -- Fruh, K -- Yang, Y -- New York, N.Y. -- Science. 1999 Dec 10;286(5447):2162-5.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉The R. W. Johnson Pharmaceutical Research Institute, 3210 Merryfield Row, San Diego, CA 92121, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/10591649" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; *Antigen Presentation ; Autoantigens ; Cysteine Endopeptidases/chemistry/*metabolism ; Enzyme Activators/*metabolism ; Epitopes, T-Lymphocyte/immunology ; Female ; H-Y Antigen/immunology ; Herpesviridae Infections/immunology ; Histocompatibility Antigens Class I/immunology/metabolism ; Interferons/pharmacology ; Lymphocytic Choriomeningitis/immunology ; Lymphocytic choriomeningitis virus/immunology ; Male ; Mice ; Multienzyme Complexes/chemistry/*metabolism ; Muromegalovirus/immunology ; Ovalbumin/immunology ; Peptide Fragments/immunology ; Proteasome Endopeptidase Complex ; Proteins/genetics/*metabolism ; T-Lymphocytes, Cytotoxic/*immunology
    Print ISSN: 0036-8075
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    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
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  • 95
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    Brain stem cells show their potential (1999)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1999-02-13
    Description: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Strauss, E -- New York, N.Y. -- Science. 1999 Jan 22;283(5401):471.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/9988647" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Blood Cells/*cytology ; Brain/*cytology/embryology ; Cell Separation ; Cell Transplantation ; Hematopoiesis ; Hematopoietic Stem Cells/*cytology ; Mice ; Stem Cell Transplantation ; Stem Cells/*cytology
    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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  • 96
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    Narcolepsy genes wake up the sleep field (1999)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1999-10-16
    Description: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Takahashi, J S -- New York, N.Y. -- Science. 1999 Sep 24;285(5436):2076-7.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Howard Hughes Medical Institute, Department of Neurobiology and Physiology, Northwestern University, Evanston, IL 60208-3520, USA. j-takahashi@nwu.edu〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/10523205" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Chromosome Mapping ; Circadian Rhythm ; Cloning, Molecular ; Dogs ; Homeostasis ; Hypothalamus/metabolism ; Ligands ; Mice ; Mice, Knockout ; Narcolepsy/*genetics/physiopathology ; Neurons/metabolism ; Neuropeptides/metabolism ; Orexin Receptors ; Receptors, G-Protein-Coupled ; Receptors, Neuropeptide/chemistry/*genetics/physiology ; *Sleep/physiology ; Sleep, REM
    Print ISSN: 0036-8075
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    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
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  • 97
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    The role of CCR7 in TH1 and TH2 cell localization and delivery of B cell help in vivo (1999)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1999-12-11
    Description: Subsets of murine CD4+ T cells localize to different areas of the spleen after adoptive transfer. Naive and T helper 1 (TH1) cells, which express the chemokine receptor CCR7, are home to the periarteriolar lymphoid sheath, whereas activated TH2 cells, which lack CCR7, form rings at the periphery of the T cell zones near B cell follicles. Retroviral transduction of TH2 cells with CCR7 forces them to localize in a TH1-like pattern and inhibits their participation in B cell help in vivo but not in vitro. Thus, differential expression of chemokine receptors results in unique cellular migration patterns that are important for effective immune responses.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Randolph, D A -- Huang, G -- Carruthers, C J -- Bromley, L E -- Chaplin, D D -- AI34580/AI/NIAID NIH HHS/ -- T32 GM07200/GM/NIGMS NIH HHS/ -- New York, N.Y. -- Science. 1999 Dec 10;286(5447):2159-62.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Division of Allergy and Immunology, Department of Internal Medicine, Center for Immunology, Washington University School of Medicine. Howard Hughes Medical Institute, St. Louis, MO 63110, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/10591648" target="_blank"〉PubMed〈/a〉
    Keywords: Adoptive Transfer ; Animals ; B-Lymphocytes/*immunology ; Calcium/metabolism ; Cell Movement ; Lymphocyte Activation ; Mice ; Mice, Inbred BALB C ; Mice, Transgenic ; Ovalbumin/immunology ; Receptors, CCR7 ; Receptors, Chemokine/*immunology/metabolism ; Signal Transduction ; Spleen/*immunology ; Th1 Cells/*immunology/metabolism ; Th2 Cells/*immunology/metabolism ; Transfection
    Print ISSN: 0036-8075
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    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
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  • 98
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    Inhibitors of the nonmevalonate pathway of isoprenoid biosynthesis as antimalarial drugs (1999)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1999-09-08
    Description: A mevalonate-independent pathway of isoprenoid biosynthesis present in Plasmodium falciparum was shown to represent an effective target for chemotherapy of malaria. This pathway includes 1-deoxy-D-xylulose 5-phosphate (DOXP) as a key metabolite. The presence of two genes encoding the enzymes DOXP synthase and DOXP reductoisomerase suggests that isoprenoid biosynthesis in P. falciparum depends on the DOXP pathway. This pathway is probably located in the apicoplast. The recombinant P. falciparum DOXP reductoisomerase was inhibited by fosmidomycin and its derivative, FR-900098. Both drugs suppressed the in vitro growth of multidrug-resistant P. falciparum strains. After therapy with these drugs, mice infected with the rodent malaria parasite P. vinckei were cured.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Jomaa, H -- Wiesner, J -- Sanderbrand, S -- Altincicek, B -- Weidemeyer, C -- Hintz, M -- Turbachova, I -- Eberl, M -- Zeidler, J -- Lichtenthaler, H K -- Soldati, D -- Beck, E -- New York, N.Y. -- Science. 1999 Sep 3;285(5433):1573-6.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Institute of Biochemistry, Academic Hospital Centre, Justus-Liebig-University, Friedrichstrasse 24, D-35392 Giessen, Germany. hassan.jomaa@biochemie.med.uni-giessen.de〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/10477522" target="_blank"〉PubMed〈/a〉
    Keywords: Aldose-Ketose Isomerases/*antagonists & inhibitors/chemistry/genetics/metabolism ; Amino Acid Sequence ; Animals ; Antimalarials/*pharmacology ; Cloning, Molecular ; Enzyme Inhibitors/pharmacology ; Fosfomycin/*analogs & derivatives/pharmacology ; Genes, Protozoan ; *Hemiterpenes ; Malaria/*drug therapy/parasitology ; Malaria, Falciparum/drug therapy/parasitology ; Mevalonic Acid/metabolism ; Mice ; Molecular Sequence Data ; Multienzyme Complexes/*antagonists & inhibitors/chemistry/genetics/metabolism ; Organelles/drug effects/metabolism ; Organophosphorus Compounds/metabolism ; Oxidoreductases/*antagonists & inhibitors/chemistry/genetics/metabolism ; Pentosephosphates/*metabolism ; Plasmodium falciparum/*drug effects/genetics/metabolism ; Recombinant Proteins/antagonists & inhibitors/metabolism ; Reverse Transcriptase Polymerase Chain Reaction ; Terpenes/*pharmacology
    Print ISSN: 0036-8075
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    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
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  • 99
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    Regulation of the mammalian pineal by non-rod, non-cone, ocular photoreceptors (1999)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1999-04-16
    Description: In mammals, ocular photoreceptors mediate an acute inhibition of pineal melatonin by light. The effect of rod and cone loss on this response was assessed by combining the rd mutation with a transgenic ablation of cones (cl) to produce mice lacking both photoreceptor classes. Despite the loss of all known retinal photoreceptors, rd/rd cl mice showed normal suppression of pineal melatonin in response to monochromatic light of wavelength 509 nanometers. These data indicate that mammals have additional ocular photoreceptors that they use in the regulation of temporal physiology.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Lucas, R J -- Freedman, M S -- Munoz, M -- Garcia-Fernandez, J M -- Foster, R G -- New York, N.Y. -- Science. 1999 Apr 16;284(5413):505-7.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Biology, Sir Alexander Fleming Building, Imperial College of Science, Technology and Medicine, London, SW7 2AZ, UK. r.j.lucas@ic.ac.uk〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/10205062" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Biological Clocks/physiology ; Circadian Rhythm/*physiology ; Cryptochromes ; Darkness ; *Drosophila Proteins ; *Eye Proteins ; Flavoproteins/genetics/physiology ; *Light ; Light Signal Transduction ; Melatonin/*metabolism ; Mice ; Mice, Inbred C3H ; Mice, Transgenic ; *Photoreceptor Cells, Invertebrate ; Photoreceptor Cells, Vertebrate/*physiology ; Pineal Gland/*metabolism ; Receptors, G-Protein-Coupled ; Retina/cytology/*physiology ; Retinal Ganglion Cells/physiology ; Retinal Pigments/genetics/physiology
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    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
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  • 100
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    A new finger on the protein destruction button (1999)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1999-11-30
    Description: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Barinaga, M -- New York, N.Y. -- Science. 1999 Oct 8;286(5438):223, 225.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/10577187" target="_blank"〉PubMed〈/a〉
    Keywords: Amino Acid Sequence ; Animals ; BRCA1 Protein/chemistry/*metabolism ; Ligases/chemistry/*metabolism ; Mice ; Mutation ; Phosphotyrosine/metabolism ; Proteins/*metabolism ; Proto-Oncogene Proteins/chemistry/genetics/*metabolism ; Proto-Oncogene Proteins c-cbl ; Receptor Protein-Tyrosine Kinases/metabolism ; Receptor, Epidermal Growth Factor/metabolism ; Receptors, Platelet-Derived Growth Factor/metabolism ; Ubiquitin-Protein Ligases ; Ubiquitins/*metabolism ; src Homology Domains
    Print ISSN: 0036-8075
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    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
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