Mic13 (also known as Qil1) is a 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. Mic13 is required for MICOS complex stability and cristae morphology. Family members such as C19orf70/QIL1 from human are orthologous to the yeast MIC12 Pfam:PF17050 [1, 2].

1: QIL1 is a novel mitochondrial protein required for MICOS complex stability and cristae morphology. Guarani V, McNeill EM, Paulo JA, Huttlin EL, Frohlich F, Gygi SP, Van Vactor D, Harper JW; Elife. 2015; [Epub ahead of print] PMID:25997101

2: Evolution and structural organization of the mitochondrial contact site (MICOS) complex and the mitochondrial intermembrane space bridging (MIB) complex. Huynen MA, Muhlmeister M, Gotthardt K, Guerrero-Castillo S, Brandt U; Biochim Biophys Acta. 2016;1863:91-101. PMID:26477565