The structure of Acidithiobacillus ferrooxidans c(4)-cytochrome: a model for complex-induced electron transfer tuning.

作者: Chantal Abergel , Wolfgang Nitschke , Guillaume Malarte , Mireille Bruschi , Jean-Michel Claverie

DOI: 10.1016/S0969-2126(03)00072-8

关键词: RedoxRusticyaninCopper proteinInorganic chemistryElectron paramagnetic resonanceElectron transferCytochromeElectron transport chainChemistryDivalentStereochemistry

摘要: Abstract The study of electron transfer between the copper protein rusticyanin (RCy) and c 4 -cytochrome CYC 41 acidophilic bacterium Acidithiobacillus ferrooxidans has evidenced a remarkable decrease RCy's redox potential upon complex formation. structure obtained at 2.2 A resolution highlighted specific glutamate residue (E121) involved in zinc binding as potentially playing central role this effect, required for to occur. EPR stopped-flow experiments confirmed strong inhibitory effect divalent cations on :RCy docking analysis RCy allows us propose detailed model complex-induced tuning agreement with our experimental data, which could be representative other proteins transfer.

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