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- W2094479838 abstract "We utilize structurally targeted peptides to identify a tC fusion switch inherent to the coil domains of the neuronal t-SNARE that pairs with the cognate v-SNARE. The tC fusion switch is located in the membrane-proximal portion of the t-SNARE and controls the rate at which the helical bundle that forms the SNAREpin can zip up to drive bilayer fusion. When the fusion switch is off (the intrinsic state of the t-SNARE), zippering of the helices from their membrane-distal ends is impeded and fusion is slow. When the tC fusion switch is on, fusion is much faster. The tC fusion switch can be thrown by a peptide that corresponds to the membrane-proximal half of the cognate v-SNARE, and binds reversibly to the cognate region of the t-SNARE. This structures the coil in the membrane-proximal domain of the t-SNARE and accelerates fusion, implying that the intrinsically unstable coil in that region is a natural impediment to the completion of zippering, and thus, fusion. Proteins that stabilize or destabilize one or the other state of the tC fusion switch would exert fine temporal control over the rate of fusion after SNAREs have already partly zippered up." @default.
- W2094479838 created "2016-06-24" @default.
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- W2094479838 date "2002-09-02" @default.
- W2094479838 modified "2023-10-01" @default.
- W2094479838 title "Regulation of membrane fusion by the membrane-proximal coil of the t-SNARE during zippering of SNAREpins" @default.
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- W2094479838 doi "https://doi.org/10.1083/jcb.200112081" @default.
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