Single-molecule FRET-derived model of the synaptotagmin 1-SNARE fusion complex.
Single-molecule FRET-derived model of the synaptotagmin 1-SNARE fusion complex.
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DOI:
10.1038/nsmb.1763
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发表时间:
2010-03
影响因子:
16.8
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中科院分区:
文献类型:
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Synchronous neurotransmission is triggered when Ca2+ binds to synaptotagmin 1, a synaptic vesicle protein that interacts with SNAREs and membranes. We used single-molecule FRET between synaptotagmin’s two C2 domains to determine that their conformation consists of multiple states with occasional transitions, consistent with domains in random relative motion. SNARE binding results in narrower intra-synaptotagmin FRET distributions and less frequent transitions between states. We obtained an experimentally determined model of the elusive synaptotagmin 1–SNARE complex by using a multi-body docking approach with 34 FRET-derived distances as restraints. The Ca2+-binding loops point away from the SNARE complex, so they could interact with the same membrane. The loop arrangement is similar to that of the crystal structure of SNARE-induced Ca2+ bound synaptotagmin 3, suggesting a common mechanism by which the interaction between synaptotagmins and SNAREs plays a role in Ca2+-triggered fusion.
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DOI:
10.1126/science.1166500
发表时间:
2009-01-23
期刊:
Science (New York, N.Y.)
影响因子:
--
作者:
Giraudo CG;Garcia-Diaz A;Eng WS;Chen Y;Hendrickson WA;Melia TJ;Rothman JE
通讯作者:
Rothman JE
影响因子:
16.8
作者:
Araç, D;Chen, XC;Rizo, J
通讯作者:
Rizo, J
影响因子:
48
作者:
Muschielok, Adam;Andrecka, Joanna;Michaelis, Jens
通讯作者:
Michaelis, Jens
DOI:
10.1073/pnas.0610673104
发表时间:
2007-07-31
影响因子:
11.1
作者:
Cisse, Ibrahim;Okumus, Burak;Ha, Taekjip
通讯作者:
Ha, Taekjip
影响因子:
64.8
作者:
Fernández-Chacón, R;Königstorfer, A;Südhof, TC
通讯作者:
Südhof, TC