Deduced amino acid sequence of mature chicken testis ferredoxin.

The cDNA sequence encoding the complete mature form of the steroidogenic ferredoxin from chicken testis has been determined and the amino acid sequence deduced therefrom has been compared with the sequences of bovine, human and porcine steroidogenic ferredoxins. The chicken sequence is between 84% and 88% identical with those of the other mitochondrial iron-sulfur proteins. Thus, the amino acid structure of steroidogenic ferredoxins which transfer electrons to mitochondrial forms of cytochrome P-450 has been very highly conserved over evolutionary time.