5E6M

Crystal structure of human wild type GlyRS bound with tRNAGly

5E6M の概要

• エントリーDOI: 10.2210/pdb5e6m/pdb
• 分子名称: Glycine--tRNA ligase, tRNA(Gly), GLYCYL-ADENOSINE-5'-PHOSPHATE, ... (6 entities in total)
• 機能のキーワード: aminoacyl-trna syntheses, glycyl-trna synthetase, trna, ligase-rna complex, ligase/rna
• 由来する生物種: Homo sapiens (Human); 詳細
• 細胞内の位置: Cytoplasm : P41250
• タンパク質・核酸の鎖数: 4
• 化学式量合計: 206231.65

構造登録者

Xie, W.,Qin, X.,Deng, X.,Chen, L.,Liu, Y. (登録日: 2015-10-10, 公開日: 2016-07-20, 最終更新日: 2023-11-08)

主引用文献

Qin, X.,Deng, X.,Chen, L.,Xie, W.
Crystal Structure of the Wild-Type Human GlyRS Bound with tRNA(Gly) in a Productive Conformation
J.Mol.Biol., 428:3603-3614, 2016

PubMed Abstract: Aminoacyl-tRNA synthetases are essential components of the protein translational machinery in all living species, among which the human glycyl-tRNA synthetase (hGlyRS) 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 hGlyRS bound with tRNA(Gly) at 2.95Å. 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 hGlyRS in complex with tRNA(Gly), 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.

PubMed: 27261259
DOI: 10.1016/j.jmb.2016.05.018

実験手法

X-RAY DIFFRACTION (2.927 Å)