Crystal Structure of the Wild-Type Human GIyRS Bound with tRNA (GIY) in a Productive Conformation

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	Crystal Structure of the Wild-Type Human GIyRS Bound with tRNA (GIY) in a Productive Conformation
	Qin, Xiangjing; Deng, Xiangyu; Chen, Lei; Xie, Wei
刊名	JOURNAL OF MOLECULAR BIOLOGY
	2016
卷号	428 期号:18 页码:3603-3614
通讯作者	Xie, W (reprint author), Sun Yat Sen Univ, Sch Life Sci, State Key Lab Biocontrol, Key Lab Gene Engn,Minist Educ, 135 W Xingang Rd, Guangzhou 510275, Guangdong, Peoples R China.
英文摘要	Aminoacyl-tRNA synthetases are essential components of the protein translational machinery in all living species, among which the human glycyl-tRNA synthetase (hGIyRS) is of great research interest because of its unique species-specific aminoacylation properties and noncanonical roles in the Charcot Marie Tooth neurological disease. However, the molecular mechanisms of how the enzyme carries out its classical and alternative functions are not well understood. Here, we report a complex structure of the wild-type hGIyRS bound with tRNA(GIY) at 2.95 angstrom. In the complex, the flexible Whep-TRS domain is visible in one of the subunits of the enzyme dimer, and the tRNA molecule is also completely resolved. At the active site, a glycyl-AMP molecule is synthesized and is waiting for the transfer of the glycyl moiety to occur. This cocrystal structure provides us with new details about the recognition mechanism in the intermediate stage during glycylation, which was not well elucidated in the previous crystal structures where the inhibitor AMPPNP was used for crystallization. More importantly, the structural and biochemical work conducted in the current and previous studies allows us to build a model of the full-length hGIyRS in complex with tRNAGIY, which greatly helps us to understand the roles that insertions and the Whep-TRS domain play in the tRNA-binding process. Finally, through structure comparison with other class II aminoacyl-tRNA synthetases bound with their tRNA substrates, we found some commonalities of the aminoacylation mechanism between these enzymes. (C) 2016 Elsevier Ltd. All rights reserved.
学科主题	Biochemistry & Molecular Biology
内容类型	期刊论文
源URL	[http://ir.scsio.ac.cn/handle/344004/15293]
专题	南海海洋研究所_中科院海洋生物资源可持续利用重点实验室
推荐引用方式 GB/T 7714	Qin, Xiangjing,Deng, Xiangyu,Chen, Lei,et al. Crystal Structure of the Wild-Type Human GIyRS Bound with tRNA (GIY) in a Productive Conformation[J]. JOURNAL OF MOLECULAR BIOLOGY,2016,428(18):3603-3614.
APA	Qin, Xiangjing,Deng, Xiangyu,Chen, Lei,&Xie, Wei.(2016).Crystal Structure of the Wild-Type Human GIyRS Bound with tRNA (GIY) in a Productive Conformation.JOURNAL OF MOLECULAR BIOLOGY,428(18),3603-3614.
MLA	Qin, Xiangjing,et al."Crystal Structure of the Wild-Type Human GIyRS Bound with tRNA (GIY) in a Productive Conformation".JOURNAL OF MOLECULAR BIOLOGY 428.18(2016):3603-3614.