Enables enzyme binding activity. Predicted to be involved in several processes, including iron-sulfur cluster assembly; positive regulation of nucleobase-containing compound metabolic process; and protein maturation by iron-sulfur cluster transfer. Predicted to be located in cytosol; nucleoplasm; and spindle. Predicted to be part of CIA complex and MMXD complex. Is expressed in several structures, including apical ectodermal ridge; liver; nervous system; neural retina; and trunk somite. Orthologous to human MMS19 (MMS19 homolog, cytosolic iron-sulfur assembly component). [provided by Alliance of Genome Resources, Apr 2022]