Derlin-1 is a rhomboid pseudoprotease required for the dislocation of mutant α-1 antitrypsin from the endoplasmic reticulum.
Derlin-1 is a rhomboid pseudoprotease required for the dislocation of mutant α-1 antitrypsin from the endoplasmic reticulum.
复制标题
DOI:
10.1038/nsmb.2111
复制
发表时间:
2011-09-11
影响因子:
16.8
通讯作者:
中科院分区:
文献类型:
--
作者:
The degradation of misfolded secretory proteins is ultimately mediated by the ubiquitin-proteasome system in the cytoplasm, therefore endoplasmic reticulum–associated degradation (ERAD) substrates must be dislocated across the ER membrane through a process driven by the AAA ATPase p97/VCP. Derlins recruit p97/VCP and have been proposed to be part of the dislocation machinery. Here we report that Derlins are inactive members of the rhomboid family of intramembrane proteases and bind p97/VCP through C-terminal SHP boxes. Human Derlin-1 harboring mutations within the rhomboid domain stabilized mutant α-1 antitrypsin (NHK) at the cytosolic face of the ER membrane without disrupting the p97/VCP interaction. We propose that substrate interaction and p97/VCP recruitment are separate functions that are essential for dislocation and can be assigned respectively to the rhomboid domain and the C terminus of Derlin-1. These data suggest that intramembrane proteolysis and protein dislocation share unexpected mechanistic features.
登录
查看更多内容
DOI:
10.1073/pnas.0805371105
发表时间:
2008-08-26
影响因子:
11.1
作者:
Mueller, Britta;Klemm, Elizabeth J.;Ploegh, Hidde L.
通讯作者:
Ploegh, Hidde L.
影响因子:
11.4
作者:
Lemberg, MK;Menendez, J;Freeman, M
通讯作者:
Freeman, M
影响因子:
5.3
作者:
Rabinovich, E;Kerem, A;Bar-Nun, S
通讯作者:
Bar-Nun, S
影响因子:
64.8
作者:
Lilley, BN;Ploegh, HL
通讯作者:
Ploegh, HL
影响因子:
2.6
作者:
Sato, Brian K.;Hampton, Randolph Y.
通讯作者:
Hampton, Randolph Y.