Oxidation state-dependent protein-protein interactions in disulfide cascades

Mavridou, D.A.I, Saridakis, E, Kritsiligkou, P , Goddard, Alan, Stevens, J.M, Ferguson, S.J and Redfield, C (2011) Oxidation state-dependent protein-protein interactions in disulfide cascades. Journal of Biological Chemistry, 286 (28). pp. 24943-24956. ISSN 0021-9258

Full content URL: http://dx.doi.org/10.1074/jbc.M111.236141

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Item Type:Article
Item Status:Live Archive


Bacterial growth and pathogenicity depend on the correct formation of disulfide bonds, a process controlled by the Dsb system in the periplasm of Gram-negative bacteria. Proteins with a thioredoxin fold play a central role in this process. A general feature of thiol-disulfide exchange reactions is the need to avoid a long lived product complex between protein partners. We use a multidisciplinary approach, involving NMR, x-ray crystallography, surface plasmon resonance, mutagenesis, and in vivo experiments, to investigate the interaction between the two soluble domains of the transmembrane reductant conductor DsbD. Our results show oxidation state-dependent affinities between these two domains. These observations have implications for the interactions of the ubiquitous thioredoxin-like proteins with their substrates, provide insight into the key role played by a unique redox partner with an immunoglobulin fold, and are of general importance for oxidative protein-folding pathways in all organisms.

Subjects:C Biological Sciences > C700 Molecular Biology, Biophysics and Biochemistry
Divisions:College of Science > School of Life Sciences
ID Code:6843
Deposited On:16 Nov 2012 11:51

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