Nitric oxide: a regulator of eukaryotic initiation factor 2 kinases.
Nitric oxide: a regulator of eukaryotic initiation factor 2 kinases.
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DOI:
10.1016/j.freeradbiomed.2011.03.032
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发表时间:
2011-06-15
影响因子:
7.4
通讯作者:
Wu, Shiyong
中科院分区:
文献类型:
--
作者:
Tong, Lingying;Heim, Rachel A.;Wu, Shiyong
Generation of nitric oxide (NO•) can upstream induce and downstream mediate the kinases that phosphorylate the alpha subunit of eukaryotic initiation factor 2 (eIF2α), which plays a critical role in regulating gene expression. There are four known eIF2α kinases (EIF2AKs), and NO• affects each one uniquely. While NO• directly activates EIF2AK1 (HRI), it indirectly activates EIF2AK3 (PERK). EIF2AK4 (GCN2) is activated by depletion of L-arginine, which is used nitric oxide synthase (NOS) during the production of NO•. Finally EIF2AK2 (PKR), which can mediate inducible NOS expression and therefore NO• production, can also be activated by NO•. The production of NO• and activation of EIF2AKs coordinately regulate physiological and pathological events such as innate immune response and cell apoptosis.
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