Yeast KEOPS complex regulates telomere length independently of its t(6)A modification function | |
Liu, Ying-Ying1,2; He, Ming-Hong1; Liu, Jia-Cheng1; Lu, Yi-Si1; Peng, Jing1; Zhou, Jin-Qiu1,2 | |
刊名 | JOURNAL OF GENETICS AND GENOMICS |
2018 | |
卷号 | 45期号:5页码:247-257 |
关键词 | Transfer-rna Modification Saccharomyces-cerevisiae Crystal-structure In-vitro Protein-kinase Biosynthesis Replication Genes End Maintenance |
ISSN号 | 1673-8527 |
DOI | 10.1016/j.jgg.2018.03.004 |
文献子类 | Article |
英文摘要 | In Saccharomyces cerevisiae, the highly conserved Sua5 and KEOPS complex (including five subunits Kae1, Bud32, Cgi121, Pcc1 and Gon7) catalyze a universal tRNA modification, namely N6-threonylcarbamoyladenosine (t(6)A), and regulate telomere replication and recombination. However, whether telomere regulation function of Sua5 and KEOPS complex depends on the t(6)A modification activity remains unclear. Here we show that Sua5 and KEOPS regulate telomere length in the same genetic pathway. Interestingly, the telomere length regulation by KEOPS is independent of its t(6)A biosynthesis activity. Cytoplasmic overexpression of Qri7, a functional counterpart of KEOPS in mitochondria, restores cytosolic tRNA t(6)A modification and cell growth, but is not sufficient to rescue telomere length in the KEOPS mutant kae1 Delta cells, indicating that a t(6)A modification-independent function is responsible for the telomere regulation. The results of our in vitro biochemical and in vivo genetic assays suggest that telomerase RNA TLC1 might not be modified by Sua5 and KEOPS. Moreover, deletion of KEOPS subunits results in a dramatic reduction of telomeric G-overhang, suggesting that KEOPS regulates telomere length by promoting G-overhang generation. These findings support a model in which KEOPS regulates telomere replication independently of its function on tRNA modification. Copyright (C) 2018, Institute of Genetics and Developmental Biology, Chinese Academy of Sciences, and Genetics Society of China. Published by Elsevier Limited and Science Press. All rights reserved. |
电子版国际标准刊号 | 1873-5533 |
WOS研究方向 | Biochemistry & Molecular Biology ; Genetics & Heredity |
语种 | 英语 |
WOS记录号 | WOS:000437352900003 |
内容类型 | 期刊论文 |
版本 | 出版稿 |
源URL | [http://202.127.25.143/handle/331003/3514] |
专题 | 生化所2018年发文 上海生化细胞研究所_上海生科院生化细胞研究所 |
通讯作者 | Zhou, Jin-Qiu |
作者单位 | 1.Univ Chinese Acad Sci, Chinese Acad Sci, Shanghai Inst Biochem & Cell Biol, CAS Ctr Excellence Mol Cell Sci, Shanghai 200031, Peoples R China; 2.ShanghaiTech Univ, Sch Life Sci & Technol, Shanghai 201210, Peoples R China |
推荐引用方式 GB/T 7714 | Liu, Ying-Ying,He, Ming-Hong,Liu, Jia-Cheng,et al. Yeast KEOPS complex regulates telomere length independently of its t(6)A modification function[J]. JOURNAL OF GENETICS AND GENOMICS,2018,45(5):247-257. |
APA | Liu, Ying-Ying,He, Ming-Hong,Liu, Jia-Cheng,Lu, Yi-Si,Peng, Jing,&Zhou, Jin-Qiu.(2018).Yeast KEOPS complex regulates telomere length independently of its t(6)A modification function.JOURNAL OF GENETICS AND GENOMICS,45(5),247-257. |
MLA | Liu, Ying-Ying,et al."Yeast KEOPS complex regulates telomere length independently of its t(6)A modification function".JOURNAL OF GENETICS AND GENOMICS 45.5(2018):247-257. |
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