Calcium-independent stimulation of membrane fusion and SNAREpin formation by synaptotagmin I.
Calcium-independent stimulation of membrane fusion and SNAREpin formation by synaptotagmin I.
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DOI:
10.1083/jcb.200203135
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发表时间:
2002-07-22
期刊:
影响因子:
--
通讯作者:
Söllner TH
中科院分区:
文献类型:
--
作者:
Mahal LK;Sequeira SM;Gureasko JM;Söllner TH
Ñeurotransmitter release requires the direct coupling of the calcium sensor with the machinery for membrane fusion. SNARE proteins comprise the minimal fusion machinery, and synaptotagmin I, a synaptic vesicle protein, is the primary candidate for the main neuronal calcium sensor. To test the effect of synaptotagmin I on membrane fusion, we incorporated it into a SNARE-mediated liposome fusion assay. Synaptotagmin I dramatically stimulated membrane fusion by facilitating SNAREpin zippering. This stimulatory effect was topologically restricted to v-SNARE vesicles (containing VAMP 2) and only occurred in trans to t-SNARE vesicles (containing syntaxin 1A and SNAP-25). Interestingly, calcium did not affect the overall fusion reaction. These results indicate that synaptotagmin I can directly accelerate SNARE-mediated membrane fusion and raise the possibility that additional components might be required to ensure tight calcium coupling.
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影响因子:
64.8
作者:
Fukuda, R;McNew, JA;Söllner, TH
通讯作者:
Söllner, TH
DOI:
10.1038/nsb750
发表时间:
2002-02-01
期刊:
NATURE STRUCTURAL BIOLOGY
影响因子:
--
作者:
Fasshauer, D;Antonin, W;Jahn, R
通讯作者:
Jahn, R
影响因子:
64.5
作者:
GEPPERT, M;GODA, Y;SUDHOF, TC
通讯作者:
SUDHOF, TC
影响因子:
4.8
作者:
Bai, JH;Earles, CA;Chapman, ER
通讯作者:
Chapman, ER
影响因子:
56.9
作者:
BROSE, N;PETRENKO, AG;JAHN, R
通讯作者:
JAHN, R