Abstract
The bacterial envelope is a remarkable and complex compartment of the prokaryotic cell in which many essential functions take place. The article by Herrou and collaborators (Herrou et al., in press), by a clever combination of structural analysis, genetics and functional characterization in free-living bacterial cells and during infection in animal models, elucidates a new factor, named EipA, that plays a major role in Brucella spp envelope biogenesis and cell division. The authors demonstrate a genetic connection between eipA and lipopolysaccharide synthesis, specifically genes involved in the synthesis of the O-antigen portion of lipopolysaccharide (LPS). Beyond its crucial role in Brucella physiology, the conservation of EipA in the class Alphaproteobacteria urges microbiologists to pursue future investigation of its homologs in other species belonging to this important group of bacteria.
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