Cab45S inhibits the ER stress-induced IRE1-JNK pathway and apoptosis via GRP78/BiP.
Cab45S inhibits the ER stress-induced IRE1-JNK pathway and apoptosis via GRP78/BiP.
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Cab45S 通过 GRP78/BiP 抑制 ER 应激诱导的 IRE1-JNK 通路和细胞凋亡
DOI:
10.1038/cddis.2014.193
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发表时间:
2014-05-08
影响因子:
9
通讯作者:
中科院分区:
文献类型:
--
作者:
Disturbance of endoplasmic reticulum (ER) homeostasis causes ER stress and leads to activation of the unfolded protein response, which reduces the stress and promotes cell survival at the early stage of stress, or triggers cell death and apoptosis when homeostasis is not restored under prolonged ER stress. Here, we report that Cab45S, a member of the CREC family, inhibits ER stress-induced apoptosis. Depletion of Cab45S increases inositol-requiring kinase 1 (IRE1) activity, thus producing more spliced forms of X-box-binding protein 1 mRNA at the early stage of stress and leads to phosphorylation of c-Jun N-terminal kinase, which finally induces apoptosis. Furthermore, we find that Cab45S specifically interacts with 78-kDa glucose-regulated protein/immunoglobulin heavy chain binding protein (GRP78/BiP) on its nucleotide-binding domain. Cab45S enhances GRP78/BiP protein level and stabilizes the interaction of GRP78/BiP with IRE1 to inhibit ER stress-induced IRE1 activation and apoptosis. Together, Cab45S, a novel regulator of GRP78/BiP, suppresses ER stress-induced IRE1 activation and apoptosis by binding to and elevating GRP78/BiP, and has a role in the inhibition of ER stress-induced apoptosis.
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DOI:
10.1074/jbc.m111.316760
发表时间:
2012-01-20
期刊:
The Journal of biological chemistry
影响因子:
--
作者:
Jurczak MJ;Lee AH;Jornayvaz FR;Lee HY;Birkenfeld AL;Guigni BA;Kahn M;Samuel VT;Glimcher LH;Shulman GI
通讯作者:
Shulman GI
影响因子:
11.2
作者:
Fu, Yong;Li, Jianze;Lee, Amy S.
通讯作者:
Lee, Amy S.
影响因子:
16
作者:
Harding, HP;Novoa, I;Ron, D
通讯作者:
Ron, D
影响因子:
10.5
作者:
Nishitoh, H;Matsuzawa, A;Ichijo, H
通讯作者:
Ichijo, H
影响因子:
7
作者:
Gronborg, M;Kristiansen, TZ;Pandey, A
通讯作者:
Pandey, A