Impaired 2′,3′-cyclic phosphate tRNA repair causes thermo-sensitive genic male sterility in rice
文献类型： 外文期刊
作者： Yan, Bin 1 ; Liu, Chunyan 1 ; Sun, Jing 1 ; Mao, Yang 3 ; Zhou, Can 1 ; Li, Ji 1 ; Liu, Wei 1 ; Li, Shengdong 1 ; Yan, Wei 5 ; Fu, Chenjian 6 ; Qin, Peng 6 ; Fu, Xingxue 6 ; Zhao, Xinghui 6 ; Song, Xianwei 7 ; Nie, Jiawei 3 ; Gao, Feng 3 ; Yang, Yuanzhu 6 ; Chen, Yuhang 3 ; Cao, Xiaofeng 1 ;
作者机构： 1.Chinese Acad Sci, Inst Genet & Dev Biol, Beijing, Peoples R China
2.Beijing Acad Agr & Forestry Sci, Beijing Key Lab Agr Genet Resources & Biotechnol, Inst Biotechnol, Beijing, Peoples R China
3.Chinese Acad Sci, Inst Genet & Dev Biol, Lab Mol Dev Biol, Beijing, Peoples R China
4.Univ Chinese Acad Sci, Beijing, Peoples R China
5.Southern Univ Sci & Technol, Inst Plant & Food Sci, Dept Biol, Shenzhen, Guangdong, Peoples R China
6.Yuan Longping High Tech Agr Co Ltd, Changsha, Hunan, Peoples R China
7.Chinese Acad Sci, Inst Genet & Dev Biol, Key Lab Seed Innovat, Beijing, Peoples R China
8.State Key Lab Hybrid Rice, Changsha, Hunan, Peoples R China
9.Minist Agr & Rural Affairs, Key Lab Rice Germplasm Enhancement Southern China, Changsha, Hunan, Peoples R China
期刊名称：CELL RESEARCH （ 影响因子：25.9； 五年影响因子：36.6 ）
ISSN： 1001-0602
年卷期： 2024 年 34 卷 11 期
页码：
收录情况： SCI
摘要： Hybrid rice, widely planted in Asia, is pathogen resistant and has superior yields, making it a major contributor to global food security. The two-line hybrid rice system, which utilizes mutants exhibiting photo-/thermo-sensitive genic male sterility (P/TGMS), is the leading hybrid rice breeding technology. Mutations in THERMO-SENSITIVE GENIC MALE STERILE 5 (TMS5) accounts for over 95% of current TGMS lines. We previously found that tms5 carries a mutation in ribonuclease ZS1. Despite its importance for breeding robust rice lines, the mechanism underlying tms5-mediated TGMS remains elusive. Here, we demonstrate that TMS5 is a tRNA 2 ',3 '-cyclic phosphatase. The tms5 mutation leads to accumulation of 2 ',3 '-cyclic phosphate (cP)-Delta CCA-tRNAs (tRNAs without 3 ' CCA ended with cP), which is exacerbated by high temperatures, and reduction in the abundance of mature tRNAs, particularly alanine tRNAs (tRNA-Alas). Overexpression of tRNA-Alas in the tms5 mutant restores male fertility to 70%. Remarkably, male fertility of tms5 mutant is completely restored at high temperatures by knocking out OsVms1 which encodes the enzyme for cP-Delta CCA-tRNA generation. Our study reveals the mechanism underlying tms5-mediated TGMS in rice and provides mechanistic insight into the further improvement of TGMS in hybrid crop development.
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