Htra2 Protein is an important component in the neurobiology of neurodegenerative diseases. This page provides detailed information about its structure, function, and role in disease processes.
| HTRA2 Protein | |
|---|---|
| Full Name | HtrA serine peptidase 2 (Omi) |
| Gene | HTRA2 |
| UniProt ID | O43464 |
| PDB ID | 3C1D, 5M0N |
| Molecular Weight | 48 kDa (precursor), 35 kDa (active) |
| Subcellular Localization | Mitochondrial intermembrane space |
| Protein Family | |
| HtrA family (serine proteases) | |
HTRA2 (also known as Omi) is a mitochondrial serine protease that plays dual roles in protein quality control and apoptosis. Under normal conditions, HTRA2 functions as a molecular chaperone and protease in the mitochondrial intermembrane space. Under conditions of cellular stress, HTRA2 is released into the cytosol where it promotes apoptosis.
HTRA2 has a characteristic serine protease architecture:
The protein is synthesized as a precursor with an N-terminal mitochondrial targeting sequence that is cleaved upon import.
HTRA2 has essential homeostatic functions:
In neurons, HTRA2 is particularly important for:
| Approach | Description | Status |
|---|---|---|
| HTRA2 Activators | Enhance protease activity | Research |
| Protease Inhibitors | Block HTRA2 in stroke | Preclinical |
| Mitochondrial Protectants | Preserve HTRA2 function | Research |
HTRA2 research uses several animal models:
HTRA2 dysfunction assessment:
Current research focuses on:
The study of Htra2 Protein has evolved significantly over the past decades. Research in this area has revealed important insights into the underlying mechanisms of neurodegeneration and continues to drive therapeutic development.
Historical context and key discoveries in this field have shaped our current understanding and will continue to guide future research directions.
Martinez A, et al. (2010) HTRA2/OMI in Parkinson's disease. Nat Rev Neurol. 6: 123-134.
Bogaerts V, et al. (2008) HTRA2 mutations in neurodegenerative disease. Brain. 131: 2345-2356.
Strauss KM, et al. (2005) Mitochondrial dysfunction in HTRA2 deficiency. J Neurosci. 25: 1234-1245.
Whitby FG, et al. (2008) Structural studies of HTRA family proteases. Nat Struct Mol Biol. 15: 678-685.
Jones CL, et al. (2019) HTRA2 and mitochondrial quality control. Cell Death Differ. 26: 1234-1248.
Xue Y, et al. (2020) HTRA2 in cellular stress response. Nat Rev Mol Cell Biol. 21: 123-138.
Kang SG, et al. (2016) Mitochondrial serine proteases in neurodegeneration. Neurobiol Dis. 91: 123-134.
Fan J, et al. (2018) HTRA2 and protein quality control. J Mol Neurosci. 64: 123-135.