Component of the cytosolic iron-sulfur protein assembly (CIA) complex, a multiprotein complex that mediates the incorporation of iron-sulfur cluster into extramitochondrial Fe/S proteins. As a CIA complex component and in collaboration with CIAO1 and MMS19, binds to and facilitates the assembly of most cytosolic-nuclear Fe/S proteins. As part of the mitotic spindle-associated MMXD complex it plays a role in chromosome segregation, probably by facilitating iron-sulfur cluster assembly into ERCC2/XPD. Together with MMS19, facilitates the transfer of Fe-S clusters to the motor protein KIF4A, which ensures proper localization of KIF4A to mitotic machinery components to promote the progression of mitosis. Component of the CIA complex. Component of the MMXD complex, which includes CIAO1, ERCC2, CIAO2B, MMS19 and SLC25A5. Interacts with CIAO1, ERCC2 and MMS19; the interactions are direct. Interacts with KIF4A; the interaction facilitates the transfer of Fe-S clusters to KIF4A to ensure proper localization of KIF4A to the mitotic machinery. Interacts with CCDC117; the interaction is direct (By similarity). Belongs to the MIP18 family.