Ribosome Fate during Decoding of UGA-Sec Codons.

Ribosome Fate during Decoding of UGA-Sec Codons.
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DOI:
10.3390/ijms222413204
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发表时间:
2021-12-08
影响因子:
5.6
通讯作者:
Howard MT
Howard MT
中科院分区:
生物学2区
文献类型:
--
作者:
Copeland PR;Howard MT

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将遗传信息解码成多肽发生在翻译期间,通常遵循生物体遗传密码的密码子分配规则。然而,在某些mRNA中重新编码信号可以覆盖正常的翻译规则。一个精致的例子发生在硒蛋白mRNA的翻译过程中,其中UGA密码子被重新分配以编码第21个蛋白质氨基酸,硒代半胱氨酸。在这篇综述中,我们将研究什么是已知的机制UGA重新编码和讨论的命运核糖体,未能纳入硒代半胱氨酸。
Decoding of genetic information into polypeptides occurs during translation, generally following the codon assignment rules of the organism’s genetic code. However, recoding signals in certain mRNAs can overwrite the normal rules of translation. An exquisite example of this occurs during translation of selenoprotein mRNAs, wherein UGA codons are reassigned to encode for the 21st proteogenic amino acid, selenocysteine. In this review, we will examine what is known about the mechanisms of UGA recoding and discuss the fate of ribosomes that fail to incorporate selenocysteine.
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