Assembly-promoting protein Munc18c stimulates SNARE-dependent membrane fusion through its SNARE-like peptide.
Assembly-promoting protein Munc18c stimulates SNARE-dependent membrane fusion through its SNARE-like peptide.
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组装促进蛋白 Munc18c 通过其 SNARE 样肽刺激 SNARE 依赖性膜融合
DOI:
10.1016/j.jbc.2022.102470
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发表时间:
2022-10
影响因子:
4.8
通讯作者:
Yu, Haijia
中科院分区:
文献类型:
--
作者:
Liu, Furong;He, Ruyue;Zhu, Min;Zhou, Lin;Liu, Yinghui;Yu, Haijia
Intracellular vesicle fusion requires the soluble N-ethylmaleimide-sensitive factor attachment protein receptors (SNAREs) and their cognate Sec1/Munc18 (SM) proteins. How SM proteins act in concert with trans-SNARE complexes to promote membrane fusion remains incompletely understood. Munc18c, a broadly distributed SM protein, selectively regulates multiple exocytotic pathways, including GLUT4 exocytosis. Here, using an in vitro reconstituted system, we discovered a SNARE-like peptide (SLP), conserved in Munc18-1 of synaptic exocytosis, is crucial to the stimulatory activity of Munc18c in vesicle fusion. The direct stimulation of the SNARE-mediated fusion reaction by SLP further supported the essential role of this fragment. Interestingly, we found SLP strongly accelerates the membrane fusion rate when anchored to the target membrane but not the vesicle membrane, suggesting it primarily interacts with t-SNAREs in cis to drive fusion. Furthermore, we determined the SLP fragment is competitive with the full-length Munc18c protein and specific to the cognate v-SNARE isoforms, supporting how it could resemble Munc18c’s activity in membrane fusion. Together, our findings demonstrate that Munc18c facilitates SNARE-dependent membrane fusion through SLP, revealing that the t-SNARE-SLP binding mode might be a conserved mechanism for the stimulatory function of SM proteins in vesicle fusion.
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DOI:
10.1126/science.1224492
发表时间:
2012-09-14
期刊:
Science (New York, N.Y.)
影响因子:
--
作者:
Gao Y;Zorman S;Gundersen G;Xi Z;Ma L;Sirinakis G;Rothman JE;Zhang Y
通讯作者:
Zhang Y
DOI:
10.1083/jcb.201007176
发表时间:
2011-04-04
期刊:
The Journal of cell biology
影响因子:
--
作者:
Jewell JL;Oh E;Ramalingam L;Kalwat MA;Tagliabracci VS;Tackett L;Elmendorf JS;Thurmond DC
通讯作者:
Thurmond DC
影响因子:
82.9
作者:
Czech MP
通讯作者:
Czech MP
影响因子:
4
作者:
Han, Gayoung Anna;Bin, Na-Ryum;Sugita, Shuzo
通讯作者:
Sugita, Shuzo
DOI:
10.1073/pnas.1116975109
发表时间:
2012-06-19
影响因子:
11.1
作者:
Christie, Michelle P.;Whitten, Andrew E.;Martin, Jennifer L.
通讯作者:
Martin, Jennifer L.