| Tissue Specificity | Expressed in the brush border membrane in the kidney (at protein level). Predominantly expressed in the kidney, small intestine and pancreas. Weakly expressed in liver. |
| Function | Acts as a chaperone that facilitates biogenesis and trafficking of functional transporter heteromers to the plasma membrane. Associates with SLC7A9 to form a functional transporter complex that mediates the electrogenic exchange between cationic amino acids and neutral amino acids, with a stoichiometry of 1:1. SLC7A9-SLC3A1 transporter has system b(0,+)-like activity with high affinity for extracellular cationic amino acids and L-cystine and lower affinity for intracellular neutral amino acids. Substrate exchange is driven by high concentration of intracellular neutral amino acids and the intracellular reduction of L-cystine to L-cysteine. SLC7A9-SLC3A1 acts as a major transporter for reabsorption of L-cystine and dibasic amino acids across the brush border membrane in early proximal tubules. Associates with SLC7A13 to form a functional complex that transports anionic and neutral amino acids via exchange or facilitated diffusion. SLC7A13-SLC3A1 may act as a major transporter for L-cystine in late proximal tubules, ensuring its reabsorption from the luminal fluid in exchange for cytosolic L-glutamate or L-aspartate. |
| Protein Name | Amino Acid Transporter Heavy Chain Slc3a1D2hNeutral And Basic Amino Acid Transport ProteinNbatSolute Carrier Family 3 Member 1B(0 -+-Type Amino Acid Transporter-Related Heavy ChainRbat |
| Database Links | Reactome: R-HSA-352230Reactome: R-HSA-5619113Reactome: R-HSA-5660883 |
| Cellular Localisation | Cell MembraneSingle-Pass Type Ii Membrane ProteinApical Cell Membrane |
| Alternative Antibody Names | Anti-Amino Acid Transporter Heavy Chain Slc3a1 antibodyAnti-D2h antibodyAnti-Neutral And Basic Amino Acid Transport Protein antibodyAnti-Nbat antibodyAnti-Solute Carrier Family 3 Member 1 antibodyAnti-B(0 -+-Type Amino Acid Transporter-Related Heavy Chain antibodyAnti-Rbat antibodyAnti-SLC3A1 antibodyAnti-NBAT antibody |
Information sourced from Uniprot.org
