A mutation in either dsbA or dsbB, a gene encoding a component of a periplasmic disulfide bond-catalyzing system, is required for high-level expression of the Bacteroides fragilis metallo-beta-lactamase, CcrA, in Escherichia coli.

Abstract excerpt

The metallo-beta-lactamase gene, ccrA, from Bacteroides fragilis is functionally expressed in Escherichia coli only in the presence of a genomic mutation in iarA or iarB (increased ampicillin resistance), identified in this study as dsbA or dsbB, respectively. DsbA and DsbB are components of a periplasmic protein disulfide bond-catalyzing system. Data indicated that DsbA interacted with CcrA, creating aberrant...

Topics

• Ampicillin Resistance
• Bacterial Proteins
• Bacteroides fragilis
• Blotting, Western
• Disulfides
• Escherichia coli
• Genes, Bacterial
• Mutation
• Oxidation-Reduction
• Recombinant Proteins