The MacAB-TolC complex is a macrolide transporter complex found in E.coli and related gram-negative bacteria. Its transport activity is specific to macrolide compounds containing 14- and 15-membered lactones. It consists of the dimeric inner membrane ATPase MacB, the hexameric, periplasmic membrane fusion protein MacA and the trimeric outer membrane factor TolC.
Source:PMID:10879525,
PMID:18955484,
PMID:19254725,
GOC:bhm