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  • Title: Characterization and complete amino acid sequence of ferredoxin II from Desulfovibrio vulgaris Miyazaki.
    Author: Okawara N, Ogata M, Yagi T, Wakabayashi S, Matsubara H.
    Journal: Biochimie; 1988 Dec; 70(12):1815-20. PubMed ID: 2855025.
    Abstract:
    One of 2 ferredoxins, Fd II, purified from Desulfovibrio vulgaris Miyazaki (DvM) has been characterized and its complete amino acid sequence established. Fd II is composed of 63 amino acid residues and contains 7 cysteinyl residues but has only 4 iron atoms in an iron-sulfur cluster of a standard redox potential of -405 mV. The arrangement of cysteinyl residues in the protein suggests that some cysteinyl residues are not directly involved in ligation to the iron-sulfur cluster. Homology is recognized among Fd II (DvM), Fd I (D. desulfuricans Norway), Fd I (D. africanus Benghazi), and Fd (D. gigas). Although Fd I and Fd II in DvM are poorly homologous, the C-terminal half of Fd I is fairly homologous to the N-terminal half of Fd II. Fd II is 40% as effective as Fd I as an electron carrier for pyruvate dehydrogenase coupled with hydrogenase and cytochrome c3.
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