Efflux transporter (null)

Efflux transporters are membrane proteins that use chemical energy (usually from ATP hydrolysis or ion gradients) to export a diverse array of substances, including drugs, toxins, metabolites, and signaling molecules, out of cells. This process is vital for cellular detoxification and protection against harmful compounds, but it also underlies major clinical problems such as multidrug resistance in bacteria and reduced efficacy of chemotherapeutic drugs in cancer. Efflux transporters are divided into several protein families based on structure and energy source, with the major ones being the ATP-binding cassette (ABC) transporters (including P-glycoprotein, MRPs, BCRP), the major facilitator superfamily (MFS), the small multidrug resistance (SMR) family, and the resistance-nodulation division (RND) family. They are widely expressed in bacteria, archaea, and eukaryotes (including in the human liver, intestines, kidneys, brain, and placenta), and their presence in pathogens is a key contributor to antimicrobial resistance[3][5][6][8]. Note: "Efflux transporter" refers to a broad class of targets, not a specific molecule, so for research or drug development, specific transporter names (such as "P-glycoprotein" or "Multidrug resistance protein 1") are preferred for structured data.

Other names

efflux pumpmultidrug efflux pumpmultidrug resistance transporterdrug-efflux pumpMDR transporter

Active transport (ATP-driven in ABC transporters; proton-motive force-driven in MFS, SMR, RND families) Drug antiport (exchange of drug for protons or other ions) Multispecific or polyspecific drug binding and extrusion