How Periplasmic Thioredoxin TlpA Reduces Bacterial Copper Chaperone ScoI and Cytochrome Oxidase Subunit II (CoxB) Prior to Metallation.
Abicht, H.K., Scharer, M.A., Quade, N., Ledermann, R., Mohorko, E., Capitani, G., Hennecke, H., Glockshuber, R.(2014) J Biol Chem 289: 32431-32444
- PubMed: 25274631 
- DOI: 10.1074/jbc.M114.607127
- Primary Citation of Related Structures:  
4TXO, 4TXV - PubMed Abstract: 
Two critical cysteine residues in the copper-A site (Cu(A)) on subunit II (CoxB) of bacterial cytochrome c oxidase lie on the periplasmic side of the cytoplasmic membrane. As the periplasm is an oxidizing environment as compared with the reducing cytoplasm, the prediction was that a disulfide bond formed between these cysteines must be eliminated by reduction prior to copper insertion ...