Retention of heme in axial ligand mutants of succinate-ubiquinone xxidoreductase (complex II) from Escherichia coli.

Abstract

Succinate-ubiquinone oxidoreductase (SdhCDAB, complex II) from Escherichia coli is a four-subunit membrane-bound respiratory complex that catalyzes ubiquinone reduction by succinate. In the E. coli enzyme, heme b(556) is ligated between SdhC His(84) and SdhD His(71). Contrary to a previous report (Vibat, C. R. T., Cecchini, G., Nakamura, K., Kita, K., and… (More)

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