Ferredoxins are iron-sulfur proteins that transfer electrons in a wide variety of metabolic reactions. The 3Fe-4S cluster is reduced by a flavoprotein with NADH oxidase activity from the same organism. Binds 1 [3Fe-4S] cluster. Binds 1 [4Fe-4S] cluster. Binds 1 zinc ion. Lys-29 was found to be 95% monomethylated and Lys-101 was found to be 10% monomethylated.