CIAO1 Protein, Human

CIAO1 emerges as a pivotal player in the cytosolic iron-sulfur protein assembly (CIA) complex, a multiprotein entity orchestrating the integration of iron-sulfur clusters into extramitochondrial Fe/S proteins. Its dynamic role within this complex involves specific interactions with CIAO2A or CIAO2B and MMS19, influencing distinct branches of iron-sulfur protein assembly depending on its binding partners. The CIAO1:CIAO2B:MMS19 assembly is particularly involved in facilitating the assembly of most cytosolic-nuclear Fe/S proteins, while the CIAO1:CIAO2A complex specifically contributes to the maturation of ACO1 and stabilization of IREB2. Beyond its involvement in iron-sulfur biogenesis, CIAO1 extends its influence to modulating the transactivation activity of WT1 and participating in chromosome segregation through its association with the mitotic spindle-associated MMXD complex. As an integral component of the CIA complex and various interacting networks, CIAO1 stands as a versatile orchestrator in cellular processes involving iron-sulfur clusters and beyond.