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MTERF4 Regulates Translation by Targeting the Methyltransferase NSUN4 to the Mammalian Mitochondrial Ribosome.

机译:MTERF4通过将甲基转移酶NSUN4靶向哺乳动物的线粒体核糖体来调节翻译。

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Precise control of mitochondrial DNA gene expression is critical for regulation of oxidative phosphorylation capacity in mammals. The MTERF protein family plays a key role in this process, and its members have been implicated in regulation of transcription initiation and site-specific transcription termination. We now demonstrate that a member of this family, MTERF4, directly controls mitochondrial ribosomal biogenesis and translation. MTERF4 forms a stoichiometric complex with the ribosomal RNA methyltransferase NSUN4 and is necessary for recruitment of this factor to the large ribosomal subunit. Loss of MTERF4 leads to defective ribosomal assembly and a drastic reduction in translation. Our results thus show that MTERF4 is an important regulator of translation in mammalian mitochondria.
机译:线粒体DNA基因表达的精确控制对于调节哺乳动物的氧化磷酸化能力至关重要。 MTERF蛋白家族在此过程中起关键作用,其成员已参与转录起始和位点特异性转录终止的调控。现在,我们证明该家族成员MTERF4直接控制线粒体核糖体的生物发生和翻译。 MTERF4与核糖体RNA甲基转移酶NSUN4形成化学计量的复合物,对于将该因子募集到大的核糖体亚基是必需的。 MTERF4的丢失会导致核糖体组装缺陷,并导致翻译量急剧减少。因此,我们的结果表明,MTERF4是哺乳动物线粒体中重要的翻译调节因子。

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