Enables endopeptidase activity. Involved in several processes, including mitochondrial fusion; negative regulation of apoptotic signaling pathway; and regulation of autophagy of mitochondrion. Located in mitochondrial inner membrane. Used to study Leigh disease. Human ortholog(s) of this gene implicated in Leber hereditary optic neuropathy; coronary artery disease; hyperinsulinism; myopia; and type 2 diabetes mellitus. Orthologous to human PARL (presenilin associated rhomboid like). [provided by Alliance of Genome Resources, Apr 2022]