The function of ENSG00000147804 (SLC39A4, solute carrier family 39 member 4) is as follows. Selective transporter that mediates the uptake of Zn(2+) (PubMed:17202136, PubMed:22242765, PubMed:27321477, PubMed:28875161, PubMed:31164399, PubMed:31914589, PubMed:31979155, PubMed:33837739, PubMed:36473915). Plays an essential role for dietary zinc uptake from small intestine (By similarity). The Zn(2+) uniporter activity is regulated by zinc availability (PubMed:17202136, PubMed:32348750). Also exhibits polyspecific binding and transport of Cu(2+), Cd(2+) and possibly Ni(2+) but at higher concentrations (PubMed:22242765, PubMed:31914589). {ECO:0000250|UniProtKB:Q78IQ7, ECO:0000269|PubMed:17202136, ECO:0000269|PubMed:22242765, ECO:0000269|PubMed:27321477, ECO:0000269|PubMed:28875161, ECO:0000269|PubMed:31164399, ECO:0000269|PubMed:31914589, ECO:0000269|PubMed:31979155, ECO:0000269|PubMed:32348750, ECO:0000269|PubMed:33837739, ECO:0000269|PubMed:36473915}.