Studying calcium-triggered vesicle fusion in a single vesicle-vesicle content and lipid-mixing system.
Studying calcium-triggered vesicle fusion in a single vesicle-vesicle content and lipid-mixing system.
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DOI:
10.1038/nprot.2012.134
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发表时间:
2013-01
期刊:
影响因子:
14.8
通讯作者:
中科院分区:
文献类型:
--
作者:
This Protocol describes a single vesicle-vesicle microscopy system to study Ca2+-triggered vesicle fusion. Donor vesicles contain reconstituted synaptobrevin and synaptotagmin-1. Acceptor vesicles contain reconstituted syntaxin and SNAP-25, and are tethered to a PEG-coated glass surface. Donor vesicles are mixed with the tethered acceptor vesicles and incubated for several minutes at zero Ca2+-concentration, resulting in a collection of single interacting vesicle pairs. The donor vesicles also contain two spectrally distinct fluorophores that allow simultaneous monitoring of temporal changes of the content and membrane. Upon Ca2+-injection into the sample chamber, our system therefore differentiates between hemifusion and complete fusion of interacting vesicle pairs and determines the temporal sequence of these events on a sub-hundred millisecond timescale. Other factors, such as complexin, can be easily added. Our system is unique by monitoring both content and lipid mixing, and by starting from a metastable state of interacting vesicle pairs prior to Ca2+-injection.
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影响因子:
14.8
作者:
通讯作者:
--
影响因子:
64.8
作者:
SOLLNER, T;WHITEHART, SW;ROTHMAN, JE
通讯作者:
ROTHMAN, JE
DOI:
10.1126/science.1221976
发表时间:
2012-06-22
期刊:
Science (New York, N.Y.)
影响因子:
--
作者:
Hernandez JM;Stein A;Behrmann E;Riedel D;Cypionka A;Farsi Z;Walla PJ;Raunser S;Jahn R
通讯作者:
Jahn R
DOI:
10.1073/pnas.0906677106
发表时间:
2009-11-03
影响因子:
11.1
作者:
Cypionka, Anna;Stein, Alexander;Walla, Peter J.
通讯作者:
Walla, Peter J.
影响因子:
64.8
作者:
Pertsinidis, Alexandros;Zhang, Yunxiang;Chu, Steven
通讯作者:
Chu, Steven