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Sulfite reductase of Escherichia coli is a ferrisiderophore reductase
J Coves1, M Eschenbrenner, M Fontecave
1Laboratoire d'Etudes Dynamiques et Structurales de la Sélectivité, Unité de Recherche Associée au Centre National de la Recherche Scientifique n. 332, Université Joseph Fourier, Grenoble, France.
Biochemical and Biophysical Research Communications
|May 14, 1993
Abstract:
A soluble ferrisiderophore reductase activity of Escherichia coli was purified to homogeneity and identified as the sulfite reductase. The pure enzyme catalyzes the reduction of ferric citrate, ferriaerobactin, ferrioxamin, ferricrocin, ferrichrome and ferrifusarinin by NADPH. Free flavins, riboflavin, FMN, FAD were absolutely required, suggesting that this activity resides in the flavin reductase activity of sulfite reductase.