Compact conformations of human protein disulfide isomerase.
Compact conformations of human protein disulfide isomerase.
复制标题
人蛋白二硫键异构酶的紧凑构象
DOI:
10.1371/journal.pone.0103472
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发表时间:
2014
期刊:
影响因子:
3.7
通讯作者:
Lou J
中科院分区:
文献类型:
--
作者:
Yang S;Wang X;Cui L;Ding X;Niu L;Yang F;Wang C;Wang CC;Lou J
Protein disulfide isomerase (PDI) composed of four thioredoxin-like domains a, b, b', and a', is a key enzyme catalyzing oxidative protein folding in the endoplasmic reticulum. Large scale molecular dynamics simulations starting from the crystal structures of human PDI (hPDI) in the oxidized and reduced states were performed. The results indicate that hPDI adopts more compact conformations in solution than in the crystal structures, which are stabilized primarily by inter-domain interactions, including the salt bridges between domains a and b' observed for the first time. A prominent feature of the compact conformations is that the two catalytic domains a and a' can locate close enough for intra-molecular electron transfer, which was confirmed by the characterization of an intermediate with a disulfide between the two domains. Mutations, which disrupt the inter-domain interactions, lead to decreased reductase activity of hPDI. Our molecular dynamics simulations and biochemical experiments reveal the intrinsic conformational dynamics of hPDI and its biological impact.
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影响因子:
4.1
作者:
HAWKINS, HC;DENARDI, M;FREEDMAN, RB
通讯作者:
FREEDMAN, RB
影响因子:
4.8
作者:
Pirneskoski, A;Klappa, P;Ruddock, LW
通讯作者:
Ruddock, LW
影响因子:
3.8
作者:
Cheng, Han;Wang, Lei;Wang, Chih-chen
通讯作者:
Wang, Chih-chen
影响因子:
11.4
作者:
Klappa, P;Ruddock, LW;Freedman, RB
通讯作者:
Freedman, RB
DOI:
10.1074/jbc.m110.107839
发表时间:
2010-08-27
期刊:
The Journal of biological chemistry
影响因子:
--
作者:
Wang C;Chen S;Wang X;Wang L;Wallis AK;Freedman RB;Wang CC
通讯作者:
Wang CC