Article
Proton transfer in Azotobacter vinelandii ferredoxin I: entatic Lys84 operates as elastic counterbalance for the proton-carrying Asp15.
Biochimica et biophysica acta - 1 Jun 2001
Cherepanov D A, Mulkidjanian A Y
Abstract excerpt
In ferredoxin I from Azotobacter vinelandii, the reduction of a [3Fe-4S] iron-sulphur cluster is coupled with the protonation of the mu2S sulphur atom that is approx. 6 A away from the protein boundary. The recent study of the site-specific mutants of ferredoxin I led to the conclusion that a particular surface aspartic residue (Asp15) is solely responsible for the proton transfer to the mu2S atom by 'rapid...
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