The function of Ensembl gene identifier ENSG00000123545 (NDUFAF4, NADH:ubiquinone oxidoreductase complex assembly factor 4) is as follows. Involved in the assembly of mitochondrial NADH:ubiquinone oxidoreductase complex (complex I) (PubMed:18179882, PubMed:28853723). May be involved in cell proliferation and survival of hormone-dependent tumor cells. May be a regulator of breast tumor cell invasion. {ECO:0000269|PubMed:14871833, ECO:0000269|PubMed:17001319, ECO:0000269|PubMed:18179882, ECO:0000269|PubMed:28853723}.