Function
Plays an important role in the excretion/detoxification of endogenous and exogenous organic anions, especially from the brain and kidney. Functions as one of the detoxification systems on the choroid plexus (CP) by removing substrates from the cerebrospinal fluid (CSF). Functions as an organic anion/dicarboxylate exchanger that couples organic anion uptake indirectly to the sodium gradient. Mediates the uptake from brain of organic anions, such as p-aminohippurate (PAH), ochratoxin A, and estrone sulfate (ES) and a cationic compound, cimetidine in a sodium independent manner. Mediates the uptake of benzylpenicillin (PCG), 2,4-dichloro-phenoxyacetate (2,4-D) and PAH in CP. Mediates the efflux of PAH, pravastatin, pitavastatin and PCG from the cerebrum into the blood circulation across the blood-brain barrier (BBB). Involved in regulating the CSF concentration of H(2)-receptor antagonists at the CP. Mediates the renal uptake of indoxyl sulfate (IS), 3-carboxy-4-methyl-5-propyl-2-furanpropionate (CMPF) pravastatin, PCG, dehydroepiandrosterone sulfate (DHEAS) and is partly involved in the renal uptake of temocaprilat and ES.
Sequence
MTFSEILDRVGSMGPFQYLHVTLLALPVLGIANHNLLQIFTATTPVHHCRPPPNASIGPWVLPLDPNGKPEKCLRFVHLPNASLPNDTQRATEPCLDGWIYNSTRDTIVIEWDLVCSSNKLKEMAQSIFMAGILVGGPVIGELSDRFGRKPILTWSYLMLAASGSGAAFSPSLPVYMIFRFLCGCSISGISLSTVILNVEWVPTSMRAISSTSIGYCYTIGQFILSGLAYAIPQWRWLQLTSSAPFFIFSLLSWWVPESIRWLVLSGKYSKALKTLQRVATFNGKKEEGKKLTIEELKFNLQKDITSAKVKYGLSDLFRVSILRRVTFCLSLAWFSTGFAYYSLAMGVEEFGVNIYILQIIFGGVDIPAKFITILSLSYLGRRITQSFLLLLAGGAILALIFVPSEMQLLRTALAVFGKGCLSGSFSCLFLYTSELYPTVLRQTGMGISNVWARVGSMIAPLVKITGELQPFIPNVIFGTTALLGGSAAFFLLETLNRPLPETIEDIQNWHKQVQKTKQESEAEKASQIIPLKTGG