HTRA2 OMI PRSS25 Serine protease HTRA2 mitochondrial Omi stress-regulated endoprotease Serine proteinase OMI Serine protease 25
Molecular Weight(MW)
48841 Da
Function
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. Isoform 2 seems to be proteolytically inactive
Tissue Specificity
Isoform 1 is ubiquitous. Isoform 2 is expressed predominantly in the kidney, colon and thyroid
Cellular Localization
Mitochondrion intermembrane space. Mitochondrion membrane; Single-pass membrane protein (Potential) Note=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