MppA

__**MppA: A Periplasmic Murein Peptide-Binding Protein**__

MppA has been shown to be a periplasmic binding protein required for the uptake of the murein tripeptide. OppB, OppC, OppD and OppF, which form an ATP-dependant oligopeptide transporter are also required, suggesting that MppA transports the tripeptide to the membrane components of Opp for subsequent transport into the cytoplasm.