Post-fusion structural changes and their roles in exocytosis and endocytosis of dense-core vesicles.
Post-fusion structural changes and their roles in exocytosis and endocytosis of dense-core vesicles.
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DOI:
10.1038/ncomms4356
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发表时间:
2014
影响因子:
16.6
通讯作者:
Wu, Ling-Gang
中科院分区:
文献类型:
--
作者:
Chiang, Hsueh-Cheng;Shin, Wonchul;Zhao, Wei-Dong;Hamid, Edaeni;Sheng, Jiansong;Baydyuk, Maryna;Wen, Peter J.;Jin, Albert;Momboisse, Fanny;Wu, Ling-Gang
Vesicle fusion with the plasma membrane generates an Ω-shaped membrane profile. Its pore is thought to dilate until flattening (full-collapse), followed by classical endocytosis to retrieve vesicles. Alternatively, the pore may close (kiss-and-run), but the triggering mechanisms and its endocytic roles remain poorly understood. Here, using confocal and STED imaging of dense-core vesicles, we find that fusion-generated Ω-profiles may enlarge or shrink while maintaining vesicular membrane proteins. Closure of fusion-generated Ω-profiles, which produces various sizes of vesicles, is the dominant mechanism mediating rapid and slow endocytosis within ~1–30 s. Strong calcium influx triggers dynamin-mediated closure. Weak calcium influx does not promote closure, but facilitates the merging of Ω-profiles with the plasma membrane via shrinking rather than full-collapse. These results establish a model, termed Ω-exo-endocytosis, in which the fusion-generated Ω-profile may shrink to merge with the plasma membrane, change in size, or change in size then close in response to calcium, which is the main mechanism to retrieve dense-core vesicles.
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影响因子:
7.8
作者:
Heuser, J E;Reese, T S
通讯作者:
Reese, T S
DOI:
10.1083/jcb.57.2.499
发表时间:
1973-05
期刊:
The Journal of cell biology
影响因子:
--
作者:
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通讯作者:
Mauro A
影响因子:
64.8
作者:
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通讯作者:
GOMPERTS, BD
DOI:
10.1113/expphysiol.1989.sp003333
发表时间:
1989-12-01
影响因子:
--
作者:
HEUSER, JE
通讯作者:
HEUSER, JE
DOI:
10.1073/pnas.0707574105
发表时间:
2007-12-18
影响因子:
11.1
作者:
Balaji, J.;Ryan, T. A.
通讯作者:
Ryan, T. A.