Studying protein-reconstituted proteoliposome fusion with content indicators in vitro.
Studying protein-reconstituted proteoliposome fusion with content indicators in vitro.
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DOI:
10.1002/bies.201300010
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发表时间:
2013-07
期刊:
影响因子:
4
通讯作者:
Brunger, Axel T.
中科院分区:
文献类型:
--
作者:
Diao, Jiajie;Zhao, Minglei;Zhang, Yunxiang;Kyoung, Minjoung;Brunger, Axel T.
In vitro reconstitution assays are commonly used to study biological membrane fusion. However, to date, most ensemble and single-vesicle experiments involving SNARE proteins have been performed only with lipid-mixing, but not content-mixing indicators. Through simultaneous detection of lipid and small content-mixing indicators, we found that lipid mixing often occurs seconds prior to content mixing, or without any content mixing at all, during a 50-sec observation period, for Ca2+-triggered fusion with SNAREs, full-length synaptotagmin-1, and complexin. Our results illustrate the caveats of commonly used bulk lipid-mixing fusion experiments. We recommend that proteoliposome fusion experiments should always employ content-mixing indicators in addition to, or in place of, lipid-mixing indicators.
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