ATP-dependent transporter of the ATP-binding cassette (ABC) family that actively extrudes physiological compounds and xenobiotics from cells. Transports a range of endogenous molecules that have a key role in cellular communication and signaling, including cyclic nucleotides such as cyclic AMP (cAMP) and cyclic GMP (cGMP), bile acids, steroid conjugates, urate, and prostaglandins (    , ). Mediates the ATP-dependent efflux of glutathione conjugates such as leukotriene C4 (LTC4) and leukotriene B4 (LTB4) too. The presence of GSH is necessary for the ATP-dependent transport of LTB4, whereas GSH is not required for the transport of LTC4 . Mediates the cotransport of bile acids with reduced glutathione (GSH) ( ). Transports a wide range of drugs and their metabolites, including anticancer, antiviral and antibiotics molecules (  ). Confers resistance to anticancer agents such as methotrexate .
Subcellular locations: Basolateral cell membrane, Apical cell membrane
Its localization to the basolateral or apical membranes is tissue-dependent.
Widely expressed, with particularly high levels in prostate, but is barely detectable in liver. sinusoidal membrane of hepatocytes.