The function of Ensembl gene identifier ENSG00000115194 (SLC30A3, solute carrier family 30 member 3) is as follows. Probable proton-coupled zinc ion antiporter mediating the import of zinc from cytoplasm into synaptic vesicles and participating to cellular zinc ion homeostasis in the brain. {ECO:0000269|PubMed:17349999, ECO:0000269|PubMed:19521526, ECO:0000269|PubMed:26647834}.