Abstract
Outer membrane proteins (OMPs) in Gram-negative bacteria are transmembrane β-barrel proteins that are involved in important biological activities such as nutrient transport, signal transduction and the export of virulence factors. While it’s known that the protein complex responsible for assembly and insertion of OMPs into the outer membrane is the β-barrel assembly machinery (BAM), the detailed mechanisms for OMP insertion by BAM are only recently coming into focus. Nonetheless, to date, the only complete high-resolution structures of BAM are from Escherichia coli, leaving open the question of the degree of conservation of mechanisms across species.
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