Mitofilin controls mitochondrial cristae morphology. Mitofilin is enriched in the narrow space between the inner boundary and the outer membranes, where it forms a homotypic interaction and assembles into a large multimeric protein complex [1]. The first 78 amino acids contain a typical amino-terminal-cleavable mitochondrial presequence rich in positive-charged and hydroxylated residues and a membrane anchor domain. In addition, it has three centrally located coiled coil domains [2].

1: Molecular characterization of mitofilin (HMP), a mitochondria-associated protein with predicted coiled coil and intermembrane space targeting domains. Odgren PR, Toukatly G, Bangs PL, Gilmore R, Fey EG; J Cell Sci. 1996;109:2253-2264. PMID:8886976

2: The mitochondrial inner membrane protein mitofilin controls cristae morphology. John GB, Shang Y, Li L, Renken C, Mannella CA, Selker JM, Rangell L, Bennett MJ, Zha J; Mol Biol Cell. 2005;16:1543-1554. PMID:15647377