SIRT1 associates with eIF2-alpha and regulates the cellular stress response.
SIRT1 associates with eIF2-alpha and regulates the cellular stress response.
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DOI:
10.1038/srep00150
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发表时间:
2011
影响因子:
4.6
通讯作者:
Robbins, Paul D.
中科院分区:
文献类型:
--
作者:
Ghosh, Hiyaa Singhee;Reizis, Boris;Robbins, Paul D.
SIRT1 is a NAD+ dependent protein deacetylase known to increase longevity in model organisms. SIRT1 regulates cellular response to oxidative and/or genotoxic stress by regulating proteins such as p53 and FOXO. The eukaryotic initiation factor-2, eIF2, plays a critical role in the integrated stress response pathway. Under cellular stress, phosphorylation of the alpha subunit of eIF2 is essential for immediate shut-off of translation and activation of stress response genes. Here we demonstrate that SIRT1 interacts with eIF2α. Loss of SIRT1 results in increased phosphorylation of eIF2α. However, the downstream stress induced signaling pathway is compromised in SIRT1-deficient cells, indicated by delayed expression of the downstream target genes CHOP and GADD34 and a slower post-stress translation recovery. Finally, SIRT1 co-immunoprecipitates with mediators of eIF2α dephosphorylation, GADD34 and CreP, suggesting a role for SIRT1 in the negative feedback regulation of eIF2α phosphorylation.
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DOI:
10.1083/jcb.200904060
发表时间:
2009-09-21
期刊:
The Journal of cell biology
影响因子:
--
作者:
Li G;Mongillo M;Chin KT;Harding H;Ron D;Marks AR;Tabas I
通讯作者:
Tabas I
影响因子:
3.7
作者:
Ghosh HS;McBurney M;Robbins PD
通讯作者:
Robbins PD
DOI:
10.1083/jcb.200308075
发表时间:
2003-11-24
期刊:
The Journal of cell biology
影响因子:
--
作者:
Jousse C;Oyadomari S;Novoa I;Lu P;Zhang Y;Harding HP;Ron D
通讯作者:
Ron D
影响因子:
4.8
作者:
Tanno, Masaya;Sakamoto, Jun;Horio, Yoshiyuki
通讯作者:
Horio, Yoshiyuki
影响因子:
3.3
作者:
Kazemi, Shirin;Mounir, Zineb;Koromilas, Antonis E.
通讯作者:
Koromilas, Antonis E.