ABCC3

Source: NCBI Gene, accessed 2026-10-07.

Protein

ATP-binding cassette sub-family C member 3

Function (excerpt)

ATP-dependent transporter of the ATP-binding cassette (ABC) family that hydrolyzes ATP to enable active transport of substrates conjugated with glucuronate, glutathione or sulfate. Operates at basolateral membranes of polarized cells such as hepatocytes and intestinal epithelial cells, where it mediates the efflux of conjugated substrates from intestine and liver into the bloodstream. Involved in enterohepatic recirculation of steroid glucuronates. Shares substrate specificity with MRP2, displaying higher affinity for both estrogen and androgen glucuronates such as 17beta-estradiol, estrone, testosterone and 5alpha-dihydrotestosterone glucuronates. Involved in sinusoidal efflux of mono- and bis-glucuronidated bilirubin from hepatocytes into the blood for renal uptake and excretion. May selectively transport steroid sulfate conjugates. Has transporter activity toward androgen sulfates such as androsterone and dehydroepiandrosterone sulfates but is inactive toward estrone 3-sulfate.

Subcellular location

Basolateral cell membrane; Basal cell membrane.

Tissue specificity

Mainly expressed in the liver. Also expressed in small intestine, colon, prostate, testis, brain and at a lower level in the kidney. In testis, localized to peritubular myoid cells, Leydig cells, along the basal membrane of Sertoli cells and moderately in the adluminal compartment of the seminiferous tubules.

Source: UniProtKB/Swiss-Prot O15438, release 2026_03, licensed CC BY 4.0. This is the protein’s normal biology, not evidence about post-drug syndromes; associated conditions are inherited disorders of the gene, not PFS, PSSD or PRSD.

Written for the whole drug transporters family, not for ABCC3 specifically.