High temperature requirement protein A2 ; HtrA2 ; Omi stress-regulated endoprotease ; Serine protease 25 ; Serine proteinase OMI ; OMI ; PRSS25
Categories
Elisa
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.
Specificity
Natural and recombinant Human 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. The mature protein, but not the precursor, binds to BIRC2, BIRC3 and XIAP.