A "Drug Sweeping" State of the TriABC Triclosan Efflux Pump from Pseudomonas aeruginosa.

ABSTRACT: The structure of the TriABC inner membrane component of the triclosan/SDS-specific efflux pump from Pseudomonas aeruginosa was determined by cryoelectron microscopy to 4.5 Å resolution. The complete structure of the inner membrane transporter TriC of the resistance-nodulation-division (RND) superfamily was solved, including a partial structure of the fused periplasmic membrane fusion subunits, TriA and TriB. The substrate-free conformation of TriABC represents an intermediate step in efflux complex assembly before the engagement of the outer membrane channel. Structural analysis identified a tunnel network whose constriction impedes substrate efflux, indicating inhibition of TriABC in the unengaged state. Blind docking studies revealed binding to TriC at the same loci by substrates and bul

SUBMITTER: Fabre L 

PROVIDER: S-EPMC7935746 | biostudies-literature | 2021 Mar

REPOSITORIES: biostudies-literature