MIC19 (also known as ChChd3) and MIC25 (also known as ChChd6) are components 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 [1,2,3]. MIC19 plays an important role in the maintenance of the MICOS complex stability and the mitochondrial cristae morphology [1].

1: ChChd3, an inner mitochondrial membrane protein, is essential for maintaining crista integrity and mitochondrial function. Darshi M, Mendiola VL, Mackey MR, Murphy AN, Koller A, Perkins GA, Ellisman MH, Taylor SS; J Biol Chem. 2011;286:2918-2932. PMID:21081504

2: CHCM1/CHCHD6, novel mitochondrial protein linked to regulation of mitofilin and mitochondrial cristae morphology. An J, Shi J, He Q, Lui K, Liu Y, Huang Y, Sheikh MS; J Biol Chem. 2012;287:7411-7426. PMID:22228767

3: The MICOS complex of human mitochondria. Kozjak-Pavlovic V; Cell Tissue Res. 2017;367:83-93. PMID:27245231