Comprehensive quantitative modeling of translation efficiency in a genome-reduced bacterium.

IF 8.5 1区 生物学 Q1 BIOCHEMISTRY & MOLECULAR BIOLOGY
Molecular Systems Biology Pub Date : 2023-10-12 Epub Date: 2023-08-29 DOI:10.15252/msb.202211301
Marc Weber, Adrià Sogues, Eva Yus, Raul Burgos, Carolina Gallo, Sira Martínez, Maria Lluch-Senar, Luis Serrano
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引用次数: 1

Abstract

Translation efficiency has been mainly studied by ribosome profiling, which only provides an incomplete picture of translation kinetics. Here, we integrated the absolute quantifications of tRNAs, mRNAs, RNA half-lives, proteins, and protein half-lives with ribosome densities and derived the initiation and elongation rates for 475 genes (67% of all genes), 73 with high precision, in the bacterium Mycoplasma pneumoniae (Mpn). We found that, although the initiation rate varied over 160-fold among genes, most of the known factors had little impact on translation efficiency. Local codon elongation rates could not be fully explained by the adaptation to tRNA abundances, which varied over 100-fold among tRNA isoacceptors. We provide a comprehensive quantitative view of translation efficiency, which suggests the existence of unidentified mechanisms of translational regulation in Mpn.

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基因组减少细菌翻译效率的综合定量建模。
翻译效率主要是通过核糖体图谱来研究的,这只提供了翻译动力学的不完整画面。在这里,我们将tRNA、mRNA、RNA半衰期、蛋白质和蛋白质半衰期的绝对定量与核糖体密度进行了整合,并导出了肺炎支原体(Mpn)中475个基因(占所有基因的67%)的起始和延伸率,其中73个高精度。我们发现,尽管不同基因的起始率相差160倍以上,但大多数已知因素对翻译效率几乎没有影响。局部密码子延伸率不能完全用对tRNA丰度的适应来解释,tRNA同受体之间的差异超过100倍。我们对翻译效率提供了一个全面的定量观点,这表明在Mpn中存在未确定的翻译调控机制。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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来源期刊
Molecular Systems Biology
Molecular Systems Biology 生物-生化与分子生物学
CiteScore
18.50
自引率
1.00%
发文量
62
审稿时长
6-12 weeks
期刊介绍: Systems biology is a field that aims to understand complex biological systems by studying their components and how they interact. It is an integrative discipline that seeks to explain the properties and behavior of these systems. Molecular Systems Biology is a scholarly journal that publishes top-notch research in the areas of systems biology, synthetic biology, and systems medicine. It is an open access journal, meaning that its content is freely available to readers, and it is peer-reviewed to ensure the quality of the published work.
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