Macrolide Resistance Mediated by a Bifidobacterium breve Membrane Protein

Abstract
A gene coding for a hypothetical membrane protein from Bifidobacterium breve was expressed in Lactococcus lactis . Immunoblotting demonstrated that this protein is located in the membrane. Phenotypical changes in sensitivity towards 21 antibiotics were determined. The membrane protein-expressing cells showed higher levels of resistance to several macrolides.