The function of SLC45A2 (solute carrier family 45 member 2, ENSG00000164175) is as follows. Proton-associated glucose and sucrose transporter (By similarity). May be able to transport also fructose (By similarity). Expressed at a late melanosome maturation stage where functions as proton/glucose exporter which increase lumenal pH by decreasing glycolysis (PubMed:32966160, PubMed:35469906). Regulates melanogenesis by maintaining melanosome neutralization that is initially initiated by transient OCA2 and required for a proper function of the tyrosinase TYR (PubMed:32966160, PubMed:35469906). {ECO:0000250|UniProtKB:P58355, ECO:0000269|PubMed:18563784, ECO:0000269|PubMed:18683857, ECO:0000269|PubMed:32966160, ECO:0000269|PubMed:35469906}.