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Báo cáo khoa học: Assignment of the [4Fe-4S] clusters of Ech hydrogenase from Methanosarcina barkeri to individual subunits via the characterization of site-directed mutants

Chia sẻ: Nguyen Thang | Ngày: | Loại File: PDF | Số trang:13

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Ech hydrogenase fromMethanosarcina barkeriis a member of a distinct group of membrane-bound [NiFe] hydrogenases with sequence similarity to energy-conserving NADH:quinone oxidoreductase (complex I). The sequence of the enzyme predicts the binding of three [4Fe-4S] clusters, one by subunit EchC and two by subunit EchF. Previous studies had shown that two of these clusters could be fully reduced under 10 5 Pa of H2at pH 7 giving rise to two distinct S½ electron paramagnetic resonance (EPR) signals, designated as the g¼1.89 and theg¼1.92 signal....

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Nội dung Text: Báo cáo khoa học: Assignment of the [4Fe-4S] clusters of Ech hydrogenase from Methanosarcina barkeri to individual subunits via the characterization of site-directed mutants

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