A [RuRu] Analogue of an [FeFe]-Hydrogenase Traps the Key Hydride Intermediate of the Catalytic Cycle.
A [RuRu] Analogue of an [FeFe]-Hydrogenase Traps the Key Hydride Intermediate of the Catalytic Cycle.
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DOI:
10.1002/anie.201801914
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发表时间:
2018-05-04
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影响因子:
--
通讯作者:
Reijerse EJ
中科院分区:
文献类型:
--
作者:
Sommer C;Richers CP;Lubitz W;Rauchfuss TB;Reijerse EJ
The active site of the [FeFe]-hydrogenases features a binuclear [2Fe]H sub-cluster that contains a unique bridging amine moiety close to an exposed iron center. Heterolytic splitting of H2 results in the formation of a transient terminal hydride at this iron site, which, however is difficult to stabilize. We show that the hydride intermediate forms immediately when [2Fe]H is replaced with [2Ru]H analogues through artificial maturation. Outside the protein, the [2Ru]H analogues form bridging hydrides, which rearrange to terminal hydrides after insertion into the apo-protein. H/D exchange of the hydride only occurs for [2Ru]H analogues containing the bridging amine moiety. Wechsel im Zentrum: Mit künstlicher Reifung und Ruthenium-Synthesechemie (wurde eine Ru2-Einheit in das aktive) Zentrum einer [FeFe]-Hydrogenase eingebracht. Das Protein begünstigt die Bildung terminaler Hydride, der Amin-Kofaktor ermöglicht einen Hydrid-Isoto-penaustausch, und die Dimetallhydride sind redoxaktiv in der Katalyse.
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