Predicted to enable serine-type endopeptidase activity. Predicted to be involved in positive regulation of apoptotic process; programmed cell death; and proteolysis. Predicted to be active in mitochondrion. Human ortholog(s) of this gene implicated in 3-methylglutaconic aciduria type 8; Parkinson's disease; and motor neuron disease. Orthologous to human HTRA2 (HtrA serine peptidase 2).