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SNAP-25 can self-associate to form a disulfide-linked complex

Berger, A.
Niemann, H.
Catsicas, S.
Published in Biological Chemistry. 1997, vol. 378, no. 10, p. 1171-1176
Abstract SNAP-25 is expressed in neurons and endocrine cells and is essential for exocytosis of neurotransmitters and peptide hormones. It has been shown to be involved in several interactions with other proteins of the secretion machinery. Here we show that SNAP-25 can self-associate to form a disulfide-linked complex. Complex formation is facilitated in vitro (in concentrated extracts or by immunoprecipitation). SNAP-25 complexes, however, also form when intact cells are treated with a membrane-permeable crosslinker indicating that SNAP-25 molecules exist in close proximity in vivo and could form complexes spontaneously. We also show that monomeric SNAP-25 and disulfide-linked SNAP-25 complexes are palmitoylated and that both can be cleaved by botulinum neurotoxin E.
Keywords AnimalsBotulinum Toxins/chemistryBrain ChemistryCell Membrane PermeabilityCross-Linking Reagents/chemistryDisulfides/ chemistryMembrane ProteinsNerve Tissue Proteins/ chemistryNeurons/chemistryPrecipitin TestsRatsSynaptosomal-Associated Protein 25
PMID: 9372187
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SADOUL, Karin et al. SNAP-25 can self-associate to form a disulfide-linked complex. In: Biological Chemistry, 1997, vol. 378, n° 10, p. 1171-1176. https://archive-ouverte.unige.ch/unige:9255

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Deposited on : 2010-07-12

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