PMID: 10700276 , Related PDB id: 1EEJ
McCarthy AA, Haebel PW, Torronen A, Rybin V, Baker EN, Metcalf P
Crystal structure of the protein disulfide bond isomerase, DsbC, from Escherichia coli.
Nat Struct Biol. 2000 Mar;7(3):196-9.
DsbC is one of five Escherichia coli proteins required for disulfide bond formation and is thought to function as a disulfide bond isomerase during oxidative protein folding in the periplasm. DsbC is a 2 x 23 kDa homodimer and has both protein disulfide isomerase and chaperone activity. We report the 1.9 A resolution crystal structure of oxidized DsbC where both Cys-X-X-Cys active sites form disulfide bonds. The molecule consists of separate thioredoxin-like domains joined via hinged linker helices to an N-terminal dimerization domain. The hinges allow relative movement of the active sites, and a broad uncharged cleft between them may be involved in peptide binding and DsbC foldase activities.