A four-iron ferredoxin from Desulfovibrio desulfuricans (Short Communication)

摘要

pFerredoxin from iDesulfovibrio desulfuricans/i was isolated, purified and crystallized. It contains four iron atoms and four sulphido or ‘acid-labile’ sulphur atoms for a molecule of 6000 daltons. The absorption spectrum in the u.v.–visible region and the electron-paramagnetic-resonance signals of the reduced protein are similar to those observed for other four-iron ferredoxins. The amino acid composition is different from that of iDesulfovibrio gigas/i ferredoxin. The redox potential of ?0.33V at pH7.0 was determined by dye techniques./p