Quality control mechanisms during ribosome maturation.

Quality control mechanisms during ribosome maturation.
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DOI:
10.1016/j.tcb.2013.01.004
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发表时间:
2013-05
影响因子:
19
通讯作者:
Karbstein, Katrin
Karbstein, Katrin
中科院分区:
生物学1区
文献类型:
--
作者:
Karbstein, Katrin

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核糖体上的蛋白质合成受到严格的质量控制,以确保遗传信息从mRNA忠实地传递到蛋白质。其中许多机制依赖于核糖体上遥远位置之间的通信,从而依赖于核糖体结构的完整性。此外,核糖体蛋白的单倍体不足增加了形成不完全组装的核糖体的机会,可能容易患上癌症。最后,释放失活的核糖体进入翻译池将导致它们的降解以及结合的mRNA的降解。总而言之,这些发现表明,必须建立质量控制机制,以调查新生核糖体并确保其功能。这篇综述介绍了目前已知的这些机制。
Protein synthesis on ribosomes is carefully quality controlled to ensure the faithful transmission of genetic information from mRNA to protein. Many of these mechanisms rely on communication between distant sites on the ribosomes, and thus on the integrity of the ribosome structure. Furthermore, haploinsufficiency of ribosomal proteins, which increases the chances of forming incompletely assembled ribosomes, can predispose to cancer. Finally, release of inactive ribosomes into the translating pool will lead to their degradation together with the degradation of the bound mRNA. Together, these findings suggest that quality control mechanisms must be in place to survey nascent ribosomes and ensure their functionality. This review gives an account of these mechanisms as currently known.
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