The function of ENSG00000112759 (SLC29A1, solute carrier family 29 member 1 (Augustine blood group)) is as follows. Uniporter involved in the facilitative transport of nucleosides and nucleobases, and contributes to maintaining their cellular homeostasis (PubMed:10722669, PubMed:10755314, PubMed:12527552, PubMed:14759222, PubMed:15037197, PubMed:17379602, PubMed:21795683, PubMed:26406980, PubMed:27995448, PubMed:35790189, PubMed:8986748). Functions as a Na(+)-independent transporter (PubMed:8986748). Involved in the transport of nucleosides such as adenosine, guanosine, inosine, uridine, thymidine and cytidine (PubMed:10722669, PubMed:10755314, PubMed:12527552, PubMed:14759222, PubMed:15037197, PubMed:17379602, PubMed:26406980, PubMed:8986748, PubMed:39737929). Also transports purine nucleobases (hypoxanthine, adenine, guanine) and pyrimidine nucleobases (thymine, uracil) (PubMed:21795683, PubMed:27995448). Also mediates the uptake of nicotinamide; contributes to maintaining nicotinamide homeostasis but also regulated nicotinamide biological roles (PubMed:39885119). Mediates basolateral nucleoside uptake into Sertoli cells, thereby regulating the transport of nucleosides in testis across the blood- testis barrier (By similarity). Regulates inosine levels in brown adipocytes tissues (BAT) and extracellular inosine levels, which controls BAT-dependent energy expenditure (PubMed:35790189). {ECO:0000250|UniProtKB:O54698, ECO:0000269|PubMed:10722669, ECO:0000269|PubMed:10755314, ECO:0000269|PubMed:12527552, ECO:0000269|PubMed:14759222, ECO:0000269|PubMed:15037197, ECO:0000269|PubMed:17379602, ECO:0000269|PubMed:21795683, ECO:0000269|PubMed:23639800, ECO:0000269|PubMed:26406980, ECO:0000269|PubMed:27995448, ECO:0000269|PubMed:35790189, ECO:0000269|PubMed:39737929, ECO:0000269|PubMed:39885119, ECO:0000269|PubMed:8986748}.