Phosphorylation of synaptic vesicle proteins: modulation of the alpha SNAP interaction with the core complex.
摘要：
We analyzed whether synaptic membrane trafficking proteins are substrates for casein kinase II, calcium/calmodulin-dependent protein kinase II, and cAMP-dependent protein kinase (PKA), three kinases implicated in the modulation of synaptic transmission. Each kinase phosphorylates a specific set of the vesicle proteins syntaxin 1A, N-ethylmaleimide-sensitive factor (NSF), vesicle-associated membrane protein (VAMP), synaptosome-associated 25-kDa protein (SNAP-25), n-sec1, alpha soluble NSF attachment protein (alpha SNAP), and synaptotagmin. VAMP is phosphorylated by calcium/calmodulin-dependent protein kinase II on serine 61. alpha SNAP is phosphorylated by PKA; however, the beta SNAP isoform is phosphorylated only 20% as efficiently. alpha SNAP phosphorylated by PKA binds to the core docking and fusion complex 10 times weaker than the dephosphorylated form. These studies provide a first glimpse at regulatory events that may be important in modulating neurotransmitter release during learning and memory.
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DOI：
10.2307/40541
被引量：
年份：
1996
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掌桥科研
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