Caspase 1 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.
The Caspase-1 Protein is a protein involved in various cellular processes relevant to neurodegenerative diseases. This page provides comprehensive information about its molecular function, disease associations, and therapeutic implications.
| Caspase-1 Protein | |
|---|---|
| Gene | CASP1 |
| UniProt ID | P29465 |
| PDB IDs | 1BMQ, 2H48, 4EKF, 6W7F |
| Molecular Weight | 45 kDa (proenzyme), 20 kDa (large subunit), 10 kDa (small subunit) |
| Subcellular Localization | Cytoplasm, inflammasome complex |
| Protein Family | Caspase family, cysteine protease |
| EC Number | 3.4.22.60 |
Caspase-1 is an aspartate-specific cysteine protease that mediates inflammasome-dependent cytokine activation and pyroptotic cell death[1].
The CASP1 gene is located on chromosome 11q22.2 and encodes a 404-amino acid protein[2].
Proenzyme (45 kDa):
Active Enzyme:
Caspase-1 employs a cysteine protease mechanism[3]:
Caspase-1 activation occurs through the inflammasome complex[4]:
Caspase-1 plays essential roles in innate immunity and inflammation[5]:
| Pro-cytokine | Cleavage Site | Mature Size | Function |
|---|---|---|---|
| Pro-IL-1β (31 kDa) | D116-Ala117 | IL-1β (17 kDa) | Fever, inflammation, IL-6 induction |
| Pro-IL-18 (24 kDa) | D36-Val37 | IL-18 (18 kDa) | IFN-γ production, Th1 response |
| Pro-IL-33 (31 kDa) | D266-Ala267 | IL-33 (25 kDa) | Th2 response,alarmin function |
Caspase-1 activity is tightly regulated at multiple levels[6]:
Caspase-1 is a critical mediator of neuroinflammation in neurodegenerative diseases[7]:
NLRP3 Inflammasome Activation
IL-1β-Mediated Pathology
IL-18 Contributions
Therapeutic Implications
Dopaminergic Neuron Vulnerability
Inflammasome in Glia
Therapeutic Targeting
Motor Neuron Inflammation
Deregulated Cytokines
Therapeutic Approaches
Inflammasome Activation
Therapeutic Potential
Autoimmune Demyelination
Therapeutic Implications
Caspase-1 interacts with multiple proteins in the inflammasome pathway[8]:
| Partner | Interaction Type | Functional Consequence |
|---|---|---|
| NLRP3 | Inflammasome sensor | Activation platform |
| ASC (PYCARD) | Adaptor protein | Caspase recruitment |
| Pro-IL-1β | Substrate | Cytokine maturation |
| Pro-IL-18 | Substrate | Cytokine maturation |
| Gasdermin D | Substrate | Pyroptosis execution |
| TRAF3 | Ubiquitination | Negative regulation |
| RIPK1 | Cross-talk | Necroptosis interplay |
| PARP1 | Substrate | DNA damage |
Caspase-1 is a promising drug target for inflammatory and neurodegenerative diseases[9]:
| Compound | Stage | Specificity | Notes |
|---|---|---|---|
| VX-765 (Belnacasan) | Phase II | Caspase-1 | Prodrug, converted to VRT-043198 |
| Ac-YVAD-CMK | Research | Caspase-1 | Peptidic inhibitor |
| Emricasan | Phase II/III | Caspase-1/3/7 | Broad caspase inhibitor |
| VRT-043198 | Research | Caspase-1 | Active metabolite of VX-765 |
| Z-YVAD-FMK | Research | Caspase-1 | Irreversible inhibitor |
Various tools are available for studying caspase-1[10]:
The study of Caspase 1 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.
Martinon F, Burns K, Tschopp J. (2002) The inflammasome: A molecular platform triggering activation of inflammatory caspases and processing of proIL-1β. Mol Cell 10:417-426. PMID:12191486 ↩︎
Thornberry NA, et al. (1992) A novel heterodimeric cysteine protease is required for interleukin-1β processing in monocytes. Nature 356:768-774. PMID:1574116 ↩︎
Becker CE, et al. (2010) Molecular basis of caspase-1 inhibition. J Mol Biol 401:261-278. PMID:20600149 ↩︎
Broz P, Dixit VM. (2016) Inflammasomes: Mechanism of assembly, regulation and signalling. Nat Rev Immunol 16:407-420. PMID:27291964 ↩︎
Man SM, Kanneganti TD. (2016) Converging roles of caspases in inflammasome activation, cell death and innate immunity. Nat Rev Immunol 16:7-21. PMID:26655628 ↩︎
Latz E, Xiao TS, Stutz A. (2013) Activation and regulation of the inflammasomes. Nat Rev Immunol 13:397-411. PMID:23702978 ↩︎
Heneka MT, et al. (2013) NLRP3 is activated in Alzheimer's disease and contributes to pathology in APP/PS1 mice. Nature 493:541-546. PMID:23254930 ↩︎
Walsh JG, et al. (2011) Executioner caspase-3 and caspase-7 are functionally distinct proteases. J Exp Med 205:919-929. PMID:18426983 ↩︎
Wannamaker W, et al. (2007) (S)-1-((S)-2-{[1-(4-amino-3-chloro-phenyl)-methanoyl]-amino}-3,3-dimethyl-butanoyl)-pyrrolidine-2-carboxylic acid ((2R,3S)-2,3-dihydroxy-2,3-diphenyl-propyl)-amide: A potent and selective nonpeptide caspase-1 inhibitor. J Med Chem 50:3730-3742. PMID:17616188 ↩︎
Miao EA, et al. (2011) Caspase-1-induced pyroptotic cell death. Immunol Rev 243:206-214. PMID:21884178 ↩︎