The function of IBA57 (iron-sulfur cluster assembly factor IBA57, Ensembl gene identifier ENSG00000181873) is as follows. Mitochondrial protein involved in the maturation of mitochondrial [4Fe-4S]-proteins in the late stage of the iron-sulfur cluster assembly pathway (PubMed:22323289, PubMed:23462291). Operates in cooperation with ISCA2 in the maturation of [4Fe-4S] proteins (PubMed:30269484). {ECO:0000269|PubMed:22323289, ECO:0000269|PubMed:23462291, ECO:0000269|PubMed:30269484}. Involved in the maturation of mitochondrial 2Fe-2S proteins in the late stage of the iron-sulfur cluster assembly pathway. .