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Nihon Kessho Gakkaishi
AcrB is a major multidrug exporter in Escherichia coli. It cooperates with a membrane fusion protein, AcrA, and an outer membrane channel, TolC. We have determined the crystal structure of AcrB at 3.5 Å resolution. Three AcrB protomers are organized as a homotrimer in the shape of a jellyfish. Each protomer is composed of a transmembrane region 50 Å thick and a 70 Å protruding headpiece. The top of the headpiece opens like a funnel, where TolC might directly dock into AcrB. A pore formed bydoi:10.5940/jcrsj.45.256 fatcat:pdvpgme26vcedjnfvi7j4qeffy