Ligand binding to the FeMo-cofactor: structures of CO-bound and reactivated nitrogenase.
Ligand binding to the FeMo-cofactor: structures of CO-bound and reactivated nitrogenase.
复制标题
DOI:
10.1126/science.1256679
复制
发表时间:
2014-09-26
期刊:
影响因子:
--
通讯作者:
Rees DC
中科院分区:
文献类型:
--
作者:
Spatzal T;Perez KA;Einsle O;Howard JB;Rees DC
The mechanism of nitrogenase remains enigmatic, with a major unresolved issue concerning how inhibitors and substrates bind to the active site. We report a crystal structure of carbon monoxide (CO) inhibited nitrogenase MoFe-protein at 1.50 Å resolution, revealing a CO molecule bridging Fe2 and Fe6 of the FeMo-cofactor. The μ2 binding geometry is achieved by replacing a belt-sulfur atom (S2B) and highlights the generation of a reactive iron species uncovered by the displacement of sulfur. The CO inhibition is fully reversible as established by regain of enzyme activity and reappearance of S2B in the 1.43 Å resolution structure of the reactivated enzyme. The substantial and reversible reorganization of the FeMo-cofactor accompanying CO binding was unanticipated and provides insights into a catalytically competent state of nitrogenase.
登录
查看更多内容
影响因子:
56.9
作者:
GEORGIADIS, MM;KOMIYA, H;REES, DC
通讯作者:
REES, DC
DOI:
10.1016/0005-2728(73)90270-3
发表时间:
1973-01-01
期刊:
BIOCHIMICA ET BIOPHYSICA ACTA
影响因子:
--
作者:
HWANG, JC;CHEN, CH;BURRIS, RH
通讯作者:
BURRIS, RH
影响因子:
4.8
作者:
Christiansen, J;Cash, VL;Dean, DR
通讯作者:
Dean, DR
影响因子:
2.9
作者:
Benton, PMC;Laryukhin, M;Seefeldt, LC
通讯作者:
Seefeldt, LC
影响因子:
56.9
作者:
Einsle, O;Tezcan, FA;Rees, DC
通讯作者:
Rees, DC