Serine protease that shows proteolytic activity against a non-specific substrate beta-casein. Promotes or induces cell death either by direct binding to and inhibition of BIRC proteins (also called inhibitor of apoptosis proteins, IAPs), leading to an increase in caspase activity, or by a BIRC inhibition-independent, caspase-independent and serine protease activity-dependent mechanism. Cleaves THAP5 and promotes its degradation during apoptosis.
Specificity
Natural and recombinant Bovine Serine protease HTRA2, mitochondrial
Subcellular Location
Mitochondrion intermembrane space Mitochondrion membrane Single-pass membrane protein Predominantly present in the intermembrane space. Released into the cytosol following apoptotic stimuli, such as UV treatment, and stimulation of mitochondria with caspase-8 truncated BID/tBID.
Homotrimer. Interacts with MXI2. Interacts with THAP5 under apoptotic conditions (By similarity). The mature protein, but not the precursor, binds to BIRC2, BIRC3 and XIAP.