A biphasic pulling force acts on transmembrane helices during translocon-mediated membrane integration.
A biphasic pulling force acts on transmembrane helices during translocon-mediated membrane integration.
复制标题
DOI:
10.1038/nsmb.2376
复制
发表时间:
2012-10
影响因子:
16.8
通讯作者:
von Heijne, Gunnar
中科院分区:
文献类型:
--
作者:
Ismail, Nurzian;Hedman, Rickard;Schiller, Nina;von Heijne, Gunnar
Membrane proteins destined for insertion into the inner membrane of bacteria or the endoplasmic reticulum membrane in eukaryotic cells are synthesized by ribosomes bound to the bacterial SecYEG or the homologous eukaryotic Sec61 translocon. During co-translational membrane integration, transmembrane α-helical segments in the nascent chain exit the translocon via a lateral gate that opens towards the surrounding membrane, but the mechanism of lateral exit is not well understood. In particular, little is known about how a transmembrane helix behaves when entering and exiting the translocon. Using translation-arrest peptides from bacterial SecM proteins and from the mammalian Xbp1 protein as force sensors, we show that substantial force is exerted on a transmembrane helix at two distinct points during its transit through the translocon channel, providing direct insight into the dynamics of membrane integration.
登录
查看更多内容
影响因子:
7.8
作者:
Nilsson, I;Whitley, P;von Heijne, G
通讯作者:
von Heijne, G
DOI:
10.1016/j.bbrc.2010.01.073
发表时间:
2010-02-26
影响因子:
3.1
作者:
Ito, Koreaki;Chiba, Shinobu;Pogliano, Kit
通讯作者:
Pogliano, Kit
影响因子:
16
作者:
Yap, Mee-Ngan;Bernstein, Harris D.
通讯作者:
Bernstein, Harris D.
影响因子:
--
作者:
Mingarro, I;Nilsson, I;von Heijne, G
通讯作者:
von Heijne, G
影响因子:
64.5
作者:
Nakatogawa, H;Ito, K
通讯作者:
Ito, K