Non-AUG translation initiation in mammals.

Non-AUG translation initiation in mammals.
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DOI:
10.1186/s13059-022-02674-2
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发表时间:
2022-05-09
期刊:
影响因子:
12.3
通讯作者:
--
中科院分区:
生物学1区
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最近的蛋白质基因组学研究揭示了注释的蛋白质编码区以外的广泛翻译,如非编码RNA和mRNA的非翻译区。这种非规范翻译主要是由于同一RNA内的起始密码子的多样性。这种多样性通常是由于一些扫描核糖体未能识别潜在的起始密码子,导致下游起始,这一过程称为泄漏扫描。AUG以外的密码子(非AUG)由于其效率低下而特别容易泄漏。在这里,我们讨论我们目前对非AUG启动的理解。我们认为非AUG启动在塑造哺乳动物蛋白质组的动态组成中几乎无处不在的作用。在线版本包含补充材料,可通过10.1186/s13059-022-02674-2获得。
Recent proteogenomic studies revealed extensive translation outside of annotated protein coding regions, such as non-coding RNAs and untranslated regions of mRNAs. This non-canonical translation is largely due to start codon plurality within the same RNA. This plurality is often due to the failure of some scanning ribosomes to recognize potential start codons leading to initiation downstream—a process termed leaky scanning. Codons other than AUG (non-AUG) are particularly leaky due to their inefficiency. Here we discuss our current understanding of non-AUG initiation. We argue for a near-ubiquitous role of non-AUG initiation in shaping the dynamic composition of mammalian proteomes. The online version contains supplementary material available at 10.1186/s13059-022-02674-2.
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