7NU2

Crystal Structure of Neisseria gonorrhoeae LeuRS E169G mutant in Complex with the Reaction Intermediate Leu-AMP

7NU2 の概要

• エントリーDOI: 10.2210/pdb7nu2/pdb
• 分子名称: Leucine--tRNA ligase, 1,2-ETHANEDIOL, ADENOSINE-5'-TRIPHOSPHATE, ... (7 entities in total)
• 機能のキーワード: protein-ligand complex, rossmann fold, trna synthetase, ligase
• 由来する生物種: Neisseria gonorrhoeae
• タンパク質・核酸の鎖数: 1
• 化学式量合計: 99294.69

構造登録者

Pang, L.,Strelkov, S.V.,Weeks, S.D. (登録日: 2021-03-11, 公開日: 2022-08-31, 最終更新日: 2024-01-31)

主引用文献

Pang, L.,Zanki, V.,Strelkov, S.V.,Van Aerschot, A.,Gruic-Sovulj, I.,Weeks, S.D.
Partitioning of the initial catalytic steps of leucyl-tRNA synthetase is driven by an active site peptide-plane flip.
Commun Biol, 5:883-883, 2022

PubMed Abstract: To correctly aminoacylate tRNA, leucyl-tRNA synthetase (LeuRS) catalyzes three reactions: activation of leucine by ATP to form leucyl-adenylate (Leu-AMP), transfer of this amino acid to tRNA and post-transfer editing of any mischarged product. Although LeuRS has been well characterized biochemically, detailed structural information is currently only available for the latter two stages of catalysis. We have solved crystal structures for all enzymatic states of Neisseria gonorrhoeae LeuRS during Leu-AMP formation. These show a cycle of dramatic conformational changes, involving multiple domains, and correlate with an energetically unfavorable peptide-plane flip observed in the active site of the pre-transition state structure. Biochemical analyses, combined with mutant structural studies, reveal that this backbone distortion acts as a trigger, temporally compartmentalizing the first two catalytic steps. These results unveil the remarkable effect of this small structural alteration on the global dynamics and activity of the enzyme.

PubMed: 36038645
DOI: 10.1038/s42003-022-03825-8

実験手法

X-RAY DIFFRACTION (2.1 Å)