https://scholars.lib.ntu.edu.tw/handle/123456789/573269
標題: | The diversity of Shine-Dalgarno sequences sheds light on the evolution of translation initiation | 作者: | Wen J.-D Kuo S.-T HSIN-HUNG CHOU Wen, J.-D. |
公開日期: | 2020 | 來源出版物: | RNA Biology | 摘要: | Shine-Dalgarno (SD) sequences, the core element of prokaryotic ribosome-binding sites, facilitate mRNA translation by base-pair interaction with the anti-SD (aSD) sequence of 16S rRNA. In contrast to this paradigm, an inspection of thousands of prokaryotic species unravels tremendous SD sequence diversity both within and between genomes, whereas aSD sequences remain largely static. The pattern has led many to suggest unidentified mechanisms for translation initiation. Here we review known translation-initiation pathways in prokaryotes. Moreover, we seek to understand the cause and consequence of SD diversity through surveying recent advances in biochemistry, genomics, and high-throughput genetics. These findings collectively show: (1) SD:aSD base pairing is beneficial but nonessential to translation initiation. (2) The 5? untranslated region of mRNA evolves dynamically and correlates with organismal phylogeny and ecological niches. (3) Ribosomes have evolved distinct usage of translation-initiation pathways in different species. We propose a model portraying the SD diversity shaped by optimization of gene expression, adaptation to environments and growth demands, and the species-specific prerequisite of ribosomes to initiate translation. The model highlights the coevolution of ribosomes and mRNA features, leading to functional customization of the translation apparatus in each organism. ? 2020 Informa UK Limited, trading as Taylor & Francis Group. |
URI: | https://www.scopus.com/inward/record.uri?eid=2-s2.0-85097898198&doi=10.1080%2f15476286.2020.1861406&partnerID=40&md5=1dfda8e573f61289b963f9fad5e51fe6 https://scholars.lib.ntu.edu.tw/handle/123456789/573269 |
ISSN: | 15476286 | DOI: | 10.1080/15476286.2020.1861406 |
顯示於: | 生命科學系 |
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