-
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.
-
Involvement in disease
Defects in HTRA2 are the cause of Parkinson disease type 13 (PARK13) [MIM:610297]. A complex neurodegenerative disorder characterized by bradykinesia, resting tremor, muscular rigidity and postural instability, as well as by a clinically significant response to treatment with levodopa. The pathology involves the loss of dopaminergic neurons in the substantia nigra and the presence of Lewy bodies (intraneuronal accumulations of aggregated proteins), in surviving neurons in various areas of the brain.
-
Sequence similarities
Belongs to the peptidase S1B family.
Contains 1 PDZ (DHR) domain.
-
Domain
The mature N-terminus is involved in the interaction with XIAP.
The PDZ domain mediates interaction with MXI2.
-
Post-translational
modifications
Autoproteolytically activated.
-
Cellular localization
Mitochondrion intermembrane space. Mitochondrion membrane. 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.
-
Information by UniProt
-
Database links
-
Alternative names
- High temperature requirement protein A2 antibody
- HTRA 2 antibody
- HtrA like serine protease antibody
- HtrA serine peptidase 2 antibody
- HtrA, E. coli, homolog of, 2 antibody
- HtrA2 antibody
- HTRA2_HUMAN antibody
- mitochondrial antibody
- Omi stress regulated endoprotease antibody
- Omi stress-regulated endoprotease antibody
- PARK 13 antibody
- PARK13 antibody
- Protease serine 25 antibody
- PRSS 25 antibody
- PRSS25 antibody
- Serine protease 25 antibody
- Serine protease HTRA2 antibody
- Serine protease HTRA2 mitochondrial antibody
- Serine protease htra2 mitochondrial precursor antibody
- Serine protease omi antibody
- Serine proteinase OMI antibody
see all