A Pyridinol Acyl Cofactor in the Active Site of [Fe]-hydrogenase Evidenced by the Reactivity of Model Complexes
作者:Bowen Hu、Dafa Chen、Xile Hu
DOI:10.1002/chem.201201954
日期:2012.9.10
Understanding the complex: The decomposition reaction of a water‐soluble complex (see scheme; 1) in H2O confirms the existence of a unique bidentate pyridinol cofactor in [Fe]‐hydrogenase. This unique moiety is confirmed for the first time by the decomposition of a well‐defined modelcomplex containing a pyridinyl methyl acyl ligand.
Reversible Protonation of a Thiolate Ligand in an [Fe]-Hydrogenase Model Complex
作者:Dafa Chen、Rosario Scopelliti、Xile Hu
DOI:10.1002/anie.201107634
日期:2012.2.20
What is the channel? The thiolateligand in the five‐coordinate modelcomplex 1 of [Fe]‐hydrogenase is preferentially and reversibly protonated, even in the presence of an acyl ligand. The results suggest that the Cys176 thiolateligand in [Fe]‐hydrogenase can serve as the internal base to accept the proton after heterolytic splitting of H2.