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Caspase 1

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Title: Caspase 1  
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Subject: IL1B, Inflammasome, Ice (disambiguation), EC 3.4.22, Ficain
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Caspase 1

Caspase 1, apoptosis-related cysteine peptidase
PDB rendering based on 1bmq.
Available structures
PDB Ortholog search: PDBe, RCSB
Symbols  ; ICE; IL1BC; P45
External IDs ChEMBL: GeneCards:
EC number
Species Human Mouse
RefSeq (mRNA)
RefSeq (protein)
Location (UCSC)
PubMed search

Caspase 1/Interleukin-1 converting enzyme is an enzyme that proteolytically cleaves other proteins, such as the precursor forms of the inflammatory cytokines interleukin 1β and interleukin 18, into active mature peptides.[1][2][3]


  • Structure 1
  • Function 2
  • Interactions 3
  • See also 4
  • References 5
  • External links 6


Caspase 1 is produced as a zymogen that is cleaved into 20 kDa (p20) and 10 kDa (p10) subunits that become part of the active enzyme. Active caspase 1 contains two heterodimers of p20 and p10. It interacts with another CARD domain containing protein called PYCARD (or ASC) and is involved in inflammasome formation and activation of inflammatory processes.[4]


Caspase 1 has been shown to induce cell necrosis or pyroptosis and may function in various developmental stages. Studies of a similar protein in mouse suggest a role in the pathogenesis of Huntington's disease. Alternative splicing of the gene results in five transcript variants encoding distinct isoforms.[5] Recent studies implicated caspase 1 in promoting CD4 T-cell death and inflammation by HIV, two signature events that fuel HIV disease progression to AIDS.[6][7]


Caspase 1 has been shown to interact with NLRC4.[8][9]

See also


  1. ^ Thornberry NA, Bull HG, Calaycay JR, Chapman KT, Howard AD, Kostura MJ, Miller DK, Molineaux SM, Weidner JR, Aunins J (1992). "A novel heterodimeric cysteine protease is required for interleukin-1 beta processing in monocytes". Nature 356 (6372): 768–74.  
  2. ^ Cerretti DP, Kozlosky CJ, Mosley B, Nelson N, Van Ness K, Greenstreet TA, March CJ, Kronheim SR, Druck T, Cannizzaro LA (1992). "Molecular cloning of the interleukin-1 beta converting enzyme". Science 256 (5053): 97–100.  
  3. ^ Black RA, Kronheim SR, Merriam JE, March CJ, Hopp TP (1989). "A pre-aspartate-specific protease from human leukocytes that cleaves pro-interleukin-1 beta". J. Biol. Chem. 264 (10): 5323–6.  
  4. ^ Mariathasan S, Newton K, Monack DM, Vucic D, French DM, Lee WP, Roose-Girma M, Erickson S, Dixit VM (2004). "Differential activation of the inflammasome by caspase-1 adaptors ASC and Ipaf". Nature 430 (6996): 213–8.  
  5. ^ "Entrez Gene: CASP1 caspase 1, apoptosis-related cysteine peptidase (interleukin 1, beta, convertase)". 
  6. ^ Doitsh G, Galloway NL, Geng X, Yang Z, Monroe KM, Zepeda O, Hunt PW, Hatano H, Sowinski S, Muñoz-Arias I, Greene WC (2014). "Cell death by pyroptosis drives CD4 T-cell depletion in HIV-1 infection". Nature 505 (7484): 509–14.  
  7. ^ Monroe KM, Yang Z, Johnson JR, Geng X, Doitsh G, Krogan NJ, Greene WC (2014). "IFI16 DNA sensor is required for death of lymphoid CD4 T cells abortively infected with HIV". Science 343 (6169): 428–32.  
  8. ^ Damiano JS, Oliveira V, Welsh K, Reed JC (2004). "Heterotypic interactions among NACHT domains: implications for regulation of innate immune responses". Biochem. J. 381 (Pt 1): 213–9.  
  9. ^ Damiano JS, Stehlik C, Pio F, Godzik A, Reed JC (2001). "CLAN, a novel human CED-4-like gene". Genomics 75 (1-3): 77–83.  

External links

  • The MEROPS online database for peptidases and their inhibitors: C14.001

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