Solute carrier organic anion transporter 2A subfamily of the Major Facilitator Superfamily of transporters
The Solute carrier organic anion transporter 2A (SLCO2A), also called Organic anion-transporting polypeptide 2A (OATP2A), subfamily has one mammalian member, OATP2A1 (encoded by SLCO2A1), which is also called prostaglandin transporter. It is a lactate/prostaglandin anion exchanger that mediates the release of newly synthesized prostaglandins (PGD2, PGE1, PGE2, PGF2A and PGI2) from cells, the transepithelial transport of prostaglandins, and the clearance of prostaglandins from the circulation. Mutations in SLCO2A1 can cause primary hypertrophic osteoarthropathy (PHO), a rare multi-organic disease characterized by digital clubbing, pachydermia and periosteal reaction. The SLCO2A/OATP2A subfamily belongs to the Solute carrier organic anion transporter [SLCO, also called organic anion transporting polypeptides (OATPs) or Solute carrier family 21] family of the Major Facilitator Superfamily (MFS) of transporters. MFS proteins 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.",