Function 1: Mitochondrial protease (ATP-dependant mitochondrial protease).
Function 2: Chaperone function in the assembly of inner membrane protein complexes. Participates in the regulation of mitochondrial gene expression and in the maintenance of the integrity of the mitochondrial genome. Binds to mitochondrial promoters and RNA in a single-stranded, site-specific, and strand-specific manner.
Publications (PMID): 9149530, 17420247