PMID:15546661

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Citation

Nakamoto, H and Bardwell, JC (2004) Catalysis of disulfide bond formation and isomerization in the Escherichia coli periplasm. Biochim. Biophys. Acta 1694:111-9

Abstract

Disulfide bond formation is a catalyzed process in vivo. In prokaryotes, the oxidation of cysteine pairs is achieved by the transfer of disulfides from the highly oxidizing DsbA/DsbB catalytic machinery to substrate proteins. The oxidizing power utilized by this system comes from the membrane-embedded electron transport system, which utilizes molecular oxygen as a final oxidant. Proofreading of disulfide bond formation is performed by the DsbC/DsbD system, which has the ability to rearrange non-native disulfides to their native configuration. These disulfide isomerization reactions are sustained by a constant supply of reducing power provided by the cytoplasmic thioredoxin system, utilizing NADPH as the ultimate electron source.

Links

PubMed Online version:10.1016/j.bbamcr.2004.02.012

Keywords

Catalysis; Cysteine/chemistry; Cysteine/metabolism; Disulfides/metabolism; Escherichia coli/enzymology; Periplasm/enzymology; Periplasm/metabolism; Protein Disulfide-Isomerases/metabolism; Protein Engineering; Recombinant Proteins/chemistry; Recombinant Proteins/metabolism

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