Component of the MICOS complex, a large protein complex of the mitochondrial inner membrane that plays crucial roles in the maintenance of crista junctions, inner membrane architecture, and formation of contact sites to the outer membrane (By similarity). Component of the mitochondrial contact site and cristae organizing system (MICOS) complex (By similarity). Interacts with the mitochondria-shaping protein Opa1 (PubMed:24998521). Belongs to the MICOS complex subunit Mic60 family.