Gene Regulation, Stem Cells and Cancer Programme, Centre for Genomic Regulation (CRG-UPF), Dr Aiguader 88, 08003-Barcelona, Spain.
Cell Res. 2012 Dec;22(12):1634-6. doi: 10.1038/cr.2012.102. Epub 2012 Jul 3.
Cap-dependent translation is initiated by the binding of eIF4E to the cap structure at the 5' end of mRNAs. During hypoxic stress, global translation decreases because eIF4E is inactivated. In a recent article in Nature, Lee and colleagues show that residual hypoxic translation is maintained by a specialized isoform of eIF4E, which binds to target mRNAs in complex with a hypoxia-induced RNP.
帽依赖翻译是由 eIF4E 与 mRNA 5' 端帽结构的结合起始的。在低氧应激下,由于 eIF4E 失活,全局翻译减少。在最近发表在《自然》杂志上的一篇文章中,Lee 及其同事表明,残留的低氧翻译是由 eIF4E 的一种特殊同工型维持的,该同工型与缺氧诱导的 RNP 形成复合物与靶 mRNA 结合。