Amino acid sequence of ferredoxin I from Desulfovibrio vulgaris Miyazaki

The amino acid sequence of ferredoxin (Fd) I, purified from Desulfovibrio vulgaris Miyazaki, has been established. Fd I is strikingly similar to Fd III of D. africanus Benghazi with 84% homology. Both have the sequence, -Cys-x-x-Asp-x-x-Cys-x-x-x-Cys-Pro- in the N-terminal half, and the sequence, -Cys-x-x-Cys-x-x-Cys-x-x-x-Cys-Glu- in the C-terminal half of the molecule, instead of the common sequences for ligation to the usual [4Fe-4S] clusters. Fd I has 76% homology to Fd II of D. desulfuricans Norway.