Escherichia coli inner membrane transport protein YajR and similar multidrug-efflux transporters of the Major Facilitator Superfamily
This family is composed of Escherichia coli inner membrane transport protein YajR and some uncharacterized multidrug-efflux transporters. YajR is a putative proton-driven major facilitator superfamily (MFS) transporter found in many gram-negative bacteria. Unlike most MFS transporters, YajR contains a C-terminal, cytosolic YAM domain, which may play an essential role for the proper functioning of the transporter. YajR-like transporters belong to the Major Facilitator Superfamily (MFS) of membrane transport proteins, which are thought to function through a single substrate binding site, alternating-access mechanism involving a rocker-switch type of movement.
Feature 1:putative chemical substrate binding pocket [chemical binding site]
Evidence:
Comment:based on the structures of MFS transporters with bound substrates, substrate analogs, and/or inhibitors
Comment:since MFS proteins facilitate the transport of many different substrates including ions, sugar phosphates, drugs, neurotransmitters, nucleosides, amino acids, and peptides, the residues involved in substrate binding may not be strictly conserved among superfamily members
Comment:the substrate binding site or translocation pore has access to both sides of the membrane in an alternating fashion through a conformational change of the MFS transporter
Jiyao W et al.(2023). "The conserved domain database in 2023.",