Regulation of Sar1 NH2 terminus by GTP binding and hydrolysis promotes membrane deformation to control COPII vesicle fission.
Regulation of Sar1 NH2 terminus by GTP binding and hydrolysis promotes membrane deformation to control COPII vesicle fission.
复制标题
DOI:
10.1083/jcb.200509095
复制
发表时间:
2005-12-19
期刊:
影响因子:
--
通讯作者:
Aridor M
中科院分区:
文献类型:
--
作者:
Bielli A;Haney CJ;Gabreski G;Watkins SC;Bannykh SI;Aridor M
The mechanisms by which the coat complex II (COPII) coat mediates membrane deformation and vesicle fission are unknown. Sar1 is a structural component of the membrane-binding inner layer of COPII (Bi, X., R.A. Corpina, and J. Goldberg. 2002. Nature. 419:271–277). Using model liposomes we found that Sar1 uses GTP-regulated exposure of its NH2-terminal tail, an amphipathic peptide domain, to bind, deform, constrict, and destabilize membranes. Although Sar1 activation leads to constriction of endoplasmic reticulum (ER) membranes, progression to effective vesicle fission requires a functional Sar1 NH2 terminus and guanosine triphosphate (GTP) hydrolysis. Inhibition of Sar1 GTP hydrolysis, which stabilizes Sar1 membrane binding, resulted in the formation of coated COPII vesicles that fail to detach from the ER. Thus Sar1-mediated GTP binding and hydrolysis regulates the NH2-terminal tail to perturb membrane packing, promote membrane deformation, and control vesicle fission.
登录
查看更多内容
影响因子:
64.5
作者:
Lee, MCS;Orci, L;Schekman, R
通讯作者:
Schekman, R
影响因子:
64.8
作者:
Ford, MGJ;Mills, IG;McMahon, HT
通讯作者:
McMahon, HT
影响因子:
64.8
作者:
Kuehn, MJ;Herrmann, JM;Schekman, R
通讯作者:
Schekman, R
影响因子:
7.8
作者:
Aridor, M;Weissman, J;Bannykh, S;Nuoffer, C;Balch, WE
通讯作者:
Balch, WE
DOI:
10.1083/jcb.135.1.19
发表时间:
1996-10
期刊:
The Journal of cell biology
影响因子:
--
作者:
Bannykh SI;Rowe T;Balch WE
通讯作者:
Balch WE