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  • 1
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    Postsynaptic membrane fusion and long-term potentiation (1998)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1998-02-07
    Description: The possibility that membrane fusion events in the postsynaptic cell may be required for the change in synaptic strength resulting from long-term potentiation (LTP) was examined. Introducing substances into the postsynaptic cell that block membrane fusion at a number of different steps reduced LTP. Introducing SNAP, a protein that promotes membrane fusion, into cells enhanced synaptic transmission, and this enhancement was significantly less when generated in synapses that expressed LTP. Thus, postsynaptic fusion events, which could be involved either in retrograde signaling or in regulating postsynaptic receptor function or both, contribute to LTP.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Lledo, P M -- Zhang, X -- Sudhof, T C -- Malenka, R C -- Nicoll, R A -- New York, N.Y. -- Science. 1998 Jan 16;279(5349):399-403.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉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/9430593" target="_blank"〉PubMed〈/a〉
    Keywords: Amino Acid Sequence ; Animals ; Botulinum Toxins/pharmacology ; Carrier Proteins/metabolism/pharmacology ; Ethylmaleimide/pharmacology ; Excitatory Postsynaptic Potentials ; Exocytosis ; Guinea Pigs ; Hippocampus/drug effects/*physiology ; In Vitro Techniques ; *Long-Term Potentiation/drug effects ; *Membrane Fusion ; Membrane Proteins/metabolism/pharmacology ; Molecular Sequence Data ; N-Ethylmaleimide-Sensitive Proteins ; Patch-Clamp Techniques ; Peptides/pharmacology ; Pyramidal Cells/physiology ; Receptors, N-Methyl-D-Aspartate/physiology ; Recombinant Proteins/pharmacology ; Soluble N-Ethylmaleimide-Sensitive Factor Attachment Proteins ; Synaptic Membranes/*physiology ; Synaptic Transmission ; *Vesicular Transport Proteins
    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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    Requirement of serine phosphorylation for formation of STAT-promoter complexes (1995)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1995-03-31
    Description: Members of the interleukin-6 family of cytokines bind to and activate receptors that contain a common subunit, gp130. This leads to the activation of Stat3 and Stat1, two cytoplasmic signal transducers and activators of transcription (STATs), by tyrosine phosphorylation. Serine phosphorylation of Stat3 was constitutive and was enhanced by signaling through gp130. In cells of lymphoid and neuronal origins, inhibition of serine phosphorylation prevented the formation of complexes of DNA with Stat3-Stat3 but not with Stat3-Stat1 or Stat1-Stat1 dimers. In vitro serine dephosphorylation of Stat3 also inhibited DNA binding of Stat3-Stat3. The requirement of serine phosphorylation for Stat3-Stat3.DNA complex formation was inversely correlated with the affinity of Stat3-Stat3 for the binding site. Thus, serine phosphorylation appears to enhance or to be required for the formation of stable Stat3-Stat3.DNA complexes.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Zhang, X -- Blenis, J -- Li, H C -- Schindler, C -- Chen-Kiang, S -- CA46595/CA/NCI NIH HHS/ -- HL 21006/HL/NHLBI NIH HHS/ -- New York, N.Y. -- Science. 1995 Mar 31;267(5206):1990-4.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Brookdale Center for Molecular Biology, Mount Sinai School of Medicine, New York, NY 10029, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/7701321" target="_blank"〉PubMed〈/a〉
    Keywords: 1-(5-Isoquinolinesulfonyl)-2-Methylpiperazine ; Amino Acid Sequence ; Animals ; Base Sequence ; Cell Line ; Cell Nucleus/metabolism ; Ciliary Neurotrophic Factor ; Cytoplasm/metabolism ; DNA/metabolism ; DNA-Binding Proteins/*metabolism ; Humans ; Interleukin-6/metabolism/*pharmacology ; Isoquinolines/pharmacology ; Mice ; Molecular Sequence Data ; Nerve Tissue Proteins/pharmacology ; Phosphorylation ; Piperazines/pharmacology ; *Promoter Regions, Genetic ; STAT1 Transcription Factor ; STAT3 Transcription Factor ; Serine/*metabolism ; Signal Transduction ; Threonine/metabolism ; Trans-Activators/*metabolism ; Tumor Cells, Cultured ; Tyrosine/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)
    Location Call Number Expected Availability
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