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  • 1
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    Expression of intra-MHC transporter (Ham) genes and class I antigens in diabetes-susceptible NOD mice (1992)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1992-07-06
    Description: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Wicker, L S -- Podolin, P L -- Fischer, P -- Sirotina, A -- Boltz, R C Jr -- Peterson, L B -- New York, N.Y. -- Science. 1992 Jun 26;256(5065):1828-30; author reply 1830-1.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/1319611" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Antigens, CD27 ; Antigens, Differentiation, T-Lymphocyte/*biosynthesis ; B-Lymphocytes/immunology ; Blotting, Northern ; Diabetes Mellitus, Type 1/*immunology ; Disease Models, Animal ; Flow Cytometry ; H-2 Antigens/*biosynthesis ; Mice ; Mice, Inbred BALB C ; Mice, Inbred NOD ; T-Lymphocytes/immunology
    Print ISSN: 0036-8075
    Electronic ISSN: 1095-9203
    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
    Published by American Association for the Advancement of Science (AAAS)
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  • 2
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    An essential signaling role for the m3G cap in the transport of U1 snRNP to the nucleus (1990)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1990-08-17
    Description: The major small nuclear ribonucleoprotein particles (snRNPs) U1, U2, U4 + U6, and U5 have to be transported from the cytoplasm, where they are synthesized, to the nucleus, where they splice pre-messenger RNAs. Since the free core snRNP proteins in the cytoplasm do not enter the nucleus on their own, the nuclear location signal must either reside on the snRNA or be created as a result of snRNA-protein interaction. Here the involvement by the 5'-terminal cap of snRNA molecules in the nucleo-cytoplasmic transport of UsnRNPs has been studied by microinjection of synthetic U1 RNA molecules into frog oocytes; the U1 RNA bore either the normal cap (m3G) or a chemical derivative. Antibodies in the cytoplasm against the m3G cap inhibited the nuclear uptake of U1 snRNP. U1 RNA that was uncapped or contained an unnatural ApppG cap did not enter the nucleus, even though it carried a normal complement of protein molecules. When the ribose ring of the m3G cap was oxidized with periodate, nuclear transport of U1 snRNPs was severely inhibited. Finally, microinjection of m3G cap alone (but not m7G cap) into oocytes severely inhibited the transport of U1 snRNPs to the nucleus. These data suggest that one step in the nuclear uptake of U1 snRNPs involves the m3G cap structure.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Fischer, U -- Luhrmann, R -- New York, N.Y. -- Science. 1990 Aug 17;249(4970):786-90.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Institut fur Molekularbiologie und Tumorforschung, Phillipps-Universitat Marburg, Federal Republic of Germany.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/2143847" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Biological Transport ; Cell Nucleus/*metabolism ; Cytoplasm/metabolism ; Female ; Guanosine/*analogs & derivatives/physiology ; Kinetics ; Mutation ; Oocytes/*ultrastructure ; RNA Caps/*physiology ; Ribonucleoproteins/genetics/*metabolism ; Ribonucleoproteins, Small Nuclear ; Signal Transduction/*physiology ; Xenopus laevis
    Print ISSN: 0036-8075
    Electronic ISSN: 1095-9203
    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
    Published by American Association for the Advancement of Science (AAAS)
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  • 3
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    Protein tyrosine phosphatases: a diverse family of intracellular and transmembrane enzymes (1991)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1991-07-26
    Description: Protein tyrosine phosphatases (PTPs) represent a diverse family of enzymes that exist as integral membrane and nonreceptor forms. The PTPs, with specific activities in vitro 10 to 1000 times greater than those of the protein tyrosine kinases would be expected to effectively control the amount of phosphotyrosine in the cell. They dephosphorylate tyrosyl residues in vivo and take part in signal transduction and cell cycle regulation. Most of the transmembrane forms, such as the leukocyte common antigen (CD45), contain two conserved intracellular catalytic domains; but their external segments are highly variable. The structural features of the transmembrane forms suggest that these receptor-linked PTPs are capable of transducing external signals; however, the ligands remain unidentified. A hypothesis is proposed explaining how phosphatases might act synergistically with the kinases to elicit a full physiological response, without regard to the state of phosphorylation of the target proteins.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Fischer, E H -- Charbonneau, H -- Tonks, N K -- DK07902/DK/NIDDK NIH HHS/ -- GM15731/GM/NIGMS NIH HHS/ -- GM42508/GM/NIGMS NIH HHS/ -- New York, N.Y. -- Science. 1991 Jul 26;253(5018):401-6.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Biochemistry, University of Washington, Seattle 98195.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/1650499" target="_blank"〉PubMed〈/a〉
    Keywords: Amino Acid Sequence ; Animals ; Cell Cycle ; Genetic Variation ; Humans ; Isoenzymes/*genetics/metabolism ; Membrane Proteins/genetics/metabolism ; Molecular Sequence Data ; Multigene Family ; Phosphoprotein Phosphatases/*genetics/metabolism ; Protein Kinases/metabolism ; Protein Tyrosine Phosphatases
    Print ISSN: 0036-8075
    Electronic ISSN: 1095-9203
    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
    Published by American Association for the Advancement of Science (AAAS)
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  • 4
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    Linkage on chromosome 3 of autoimmune diabetes and defective Fc receptor for IgG in NOD mice (1993)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1993-04-30
    Description: A congenic, non-obese diabetic (NOD) mouse strain that contains a segment of chromosome 3 from the diabetes-resistant mouse strain B6.PL-Thy-1a was less susceptible to diabetes than NOD mice. A fully penetrant immunological defect also mapped to this segment, which encodes the high-affinity Fc receptor for immunoglobulin G (IgG), Fc gamma RI. The NOD Fcgr1 allele, which results in a deletion of the cytoplasmic tail, caused a 73 percent reduction in the turnover of cell surface receptor-antibody complexes. The development of congenic strains and the characterization of Mendelian traits that are specific to the disease phenotype demonstrate the feasibility of dissecting the pathophysiology of complex, non-Mendelian diseases.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Prins, J B -- Todd, J A -- Rodrigues, N R -- Ghosh, S -- Hogarth, P M -- Wicker, L S -- Gaffney, E -- Podolin, P L -- Fischer, P A -- Sirotina, A -- Wellcome Trust/United Kingdom -- New York, N.Y. -- Science. 1993 Apr 30;260(5108):695-8.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Nuffield Department of Surgery, University of Oxford, John Radcliffe Hospital, Headington, United Kingdom.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/8480181" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Autoimmune Diseases/*genetics ; Base Sequence ; Crosses, Genetic ; Diabetes Mellitus, Type 1/*genetics ; Endocytosis ; Female ; Gene Deletion ; *Genetic Linkage ; Genetic Markers ; Immunoglobulin G/metabolism ; Male ; Mice ; Mice, Inbred NOD ; Molecular Sequence Data ; Mutation ; Phenotype ; Receptors, IgG/*genetics/metabolism
    Print ISSN: 0036-8075
    Electronic ISSN: 1095-9203
    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
    Published by American Association for the Advancement of Science (AAAS)
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