7UT9

CryoEM structure of Azotobacter vinelandii nitrogenase complex (1:1 FeP:MoFeP, ADP/ATP-bound) during catalytic N2 reduction

7UT9 の概要

• エントリーDOI: 10.2210/pdb7ut9/pdb
• EMDBエントリー: 26763
• 分子名称: Nitrogenase molybdenum-iron protein alpha chain, IRON/SULFUR CLUSTER, ADENOSINE-5'-TRIPHOSPHATE, ... (12 entities in total)
• 機能のキーワード: nitrogenase, mofep, nitrogen fixation, fep, oxidoreductase
• 由来する生物種: Azotobacter vinelandii DJ; 詳細
• タンパク質・核酸の鎖数: 6
• 化学式量合計: 297670.28

構造登録者

Rutledge, H.L.,Cook, B.,Tezcan, F.A.,Herzik, M.A. (登録日: 2022-04-26, 公開日: 2022-08-17, 最終更新日: 2024-02-14)

主引用文献

Rutledge, H.L.,Cook, B.D.,Nguyen, H.P.M.,Herzik Jr., M.A.,Tezcan, F.A.
Structures of the nitrogenase complex prepared under catalytic turnover conditions.
Science, 377:865-869, 2022

PubMed Abstract: The enzyme nitrogenase couples adenosine triphosphate (ATP) hydrolysis to the multielectron reduction of atmospheric dinitrogen into ammonia. Despite extensive research, the mechanistic details of ATP-dependent energy transduction and dinitrogen reduction by nitrogenase are not well understood, requiring new strategies to monitor its structural dynamics during catalytic action. Here, we report cryo-electron microscopy structures of the nitrogenase complex prepared under enzymatic turnover conditions. We observe that asymmetry governs all aspects of the nitrogenase mechanism, including ATP hydrolysis, protein-protein interactions, and catalysis. Conformational changes near the catalytic iron-molybdenum cofactor are correlated with the nucleotide-hydrolysis state of the enzyme.

PubMed: 35901182
DOI: 10.1126/science.abq7641

実験手法

ELECTRON MICROSCOPY (2.44 Å)