Caspase 8

CASP8
Available structures PDB Ortholog search: PDBe RCSB List of PDB id codes 1F9E, 1I4E, 1QDU, 1QTN, 2C2Z, 2FUN, 2K7Z, 2Y1L, 3H11, 3KJN, 3KJQ, 4JJ7, 4PRZ, 4PS1, 4ZBW
Identifiers
Aliases	CASP8, ALPS2B, CAP4, Casp-8, FLICE, MACH, MCH5, caspase 8
External IDs	OMIM: 601763 MGI: 1261423 HomoloGene: 7657 GeneCards: CASP8
Gene ontology Molecular function • death effector domain binding • death receptor binding • cysteine-type peptidase activity • cysteine-type endopeptidase activity involved in apoptotic signaling pathway • protein complex binding • scaffold protein binding • peptidase activity • protein binding • identical protein binding • cysteine-type endopeptidase activity involved in apoptotic process • tumor necrosis factor receptor binding • cysteine-type endopeptidase activity • hydrolase activity • ubiquitin protein ligase binding Cellular component • cytoplasm • cell body • cytosol • CD95 death-inducing signaling complex • ripoptosome • nucleoplasm • microtubule organizing center • protein complex • mitochondrial outer membrane • mitochondrion • death-inducing signaling complex • membrane raft • neuron projection • cytoskeleton Biological process • regulation of apoptotic process • response to estradiol • cellular component disassembly involved in execution phase of apoptosis • protein heterooligomerization • activation of cysteine-type endopeptidase activity involved in apoptotic signaling pathway • response to antibiotic • regulation of tumor necrosis factor-mediated signaling pathway • positive regulation of macrophage differentiation • cellular response to organic cyclic compound • execution phase of apoptosis • natural killer cell activation • negative regulation of I-kappaB kinase/NF-kappaB signaling • regulation of necrotic cell death • TRAIL-activated apoptotic signaling pathway • proteolysis • macrophage differentiation • TRIF-dependent toll-like receptor signaling pathway • response to tumor necrosis factor • B cell activation • cell surface receptor signaling pathway • response to lipopolysaccharide • cellular response to mechanical stimulus • activation of cysteine-type endopeptidase activity • positive regulation of protein insertion into mitochondrial membrane involved in apoptotic signaling pathway • death-inducing signaling complex assembly • positive regulation of proteolysis • positive regulation of I-kappaB kinase/NF-kappaB signaling • apoptotic signaling pathway • response to cold • regulation of extrinsic apoptotic signaling pathway via death domain receptors • viral process • response to ethanol • response to cobalt ion • activation of cysteine-type endopeptidase activity involved in apoptotic process • proteolysis involved in cellular protein catabolic process • syncytiotrophoblast cell differentiation involved in labyrinthine layer development • nucleotide-binding oligomerization domain containing signaling pathway • T cell activation • suppression by virus of host cysteine-type endopeptidase activity involved in apoptotic process • apoptotic process • extrinsic apoptotic signaling pathway • negative regulation of extrinsic apoptotic signaling pathway via death domain receptors Sources:Amigo / QuickGO
RNA expression pattern
More reference expression data
Orthologs
Species	Human	Mouse
Entrez	841	12370
Ensembl	ENSG00000064012	ENSMUSG00000026029
UniProt	Q14790	O89110
RefSeq (mRNA)	NM_001080124 NM_001080125 NM_001228 NM_033355 NM_033356 NM_033357 NM_033358	NM_001080126 NM_001277926 NM_009812
RefSeq (protein)	NP_001073593.1 NP_001073594.1 NP_001219.2 NP_203519.1 NP_203520.1 NP_203522.1	NP_001073595.1 NP_033942.1
Location (UCSC)	Chr 2: 201.23 – 201.29 Mb	Chr 1: 58.8 – 58.85 Mb
PubMed search	[1]	[2]
Wikidata

View/Edit Human

View/Edit Mouse

Caspase-8 is a caspase protein, encoded by the CASP8 gene. It most likely acts upon caspase-3. CASP8 orthologs ^[3] have been identified in numerous mammals for which complete genome data are available. These unique orthologs are also present in birds.

Function

The CASP8 gene encodes a member of the cysteine-aspartic acid protease (caspase) family. Sequential activation of caspases plays a central role in the execution-phase of cell apoptosis. Caspases exist as inactive proenzymes composed of a prodomain, a large protease subunit, and a small protease subunit. Activation of caspases requires proteolytic processing at conserved internal aspartic residues to generate a heterodimeric enzyme consisting of the large and small subunits. This protein is involved in the programmed cell death induced by Fas and various apoptotic stimuli. The N-terminal FADD-like death effector domain of this protein suggests that it may interact with Fas-interacting protein FADD. This protein was detected in the insoluble fraction of the affected brain region from Huntington disease patients but not in those from normal controls, which implicated the role in neurodegenerative diseases. Many alternatively spliced transcript variants encoding different isoforms have been described, although not all variants have had their full-length sequences determined.^[4]

Clinical significance

A very rare genetic disorder of the immune system can also be caused by mutations in this gene. This disease, called CEDS, stands for “Caspase eight deficiency state.” CEDS has features similar to ALPS, another genetic disease of apoptosis, with the addition of an immunodeficient phenotype. Thus, the clinical manifestations include splenomegaly and lymphadenopathy, in addition to recurrent sinopulmonary infections, recurrent mucocutaneous herpesvirus, persistent warts and molluscum contagiosum infections, and hypogammaglobulinemia. There is sometimes lymphocytic infiltrative disease in parenchymal organs, but autoimmunity is minimal and lymphoma has not been observed in the CEDS patients. CEDS is inherited in an autosomal recessive manner.^[5]

The clinical phenotype of CEDS patients represented a paradox since caspase-8 was considered to be chiefly a proapoptotic protease, that was mainly involved in signal transduction from Tumor necrosis factor receptor family death receptors such as Fas. The defect in lymphocyte activation and protective immunity suggested that caspase-8 had additional signaling roles in lymphocytes. Further work revealed that caspase-8 was essential for the induction of the transcription factor “nuclear factor κB” (NF-κB) after stimulation through antigen receptors, Fc receptors, or Toll-like receptor 4 in T, B, and natural killer cells.^[5]

Biochemically, caspase-8 was found to enter the complex of the inhibitor of NF-κB kinase (IKK) with the upstream Bcl10-MALT1 (mucosa-associated lymphatic tissue) adapter complex which were crucial for the induction of nuclear translocation of NF-κB. Moreover, the biochemical form of caspase-8 differed in the two pathways. For the death pathway, the caspase-8 zymogen is cleaved into subunits that assemble to form the mature, highly active caspase heterotetramer whereas for the activation pathway, the zymogen appears to remain intact perhaps to limit its proteolytic function but enhance its capability as an adapter protein.^[5]

Interactions

Caspase-8 has been shown to interact with:

• BCAP31,^[6]
• BID,^[7][8]
• Bcl-2,^[8][9]
• CFLAR,^{[10][11][12][13][14][15][16]}
• Caspase-10,^{[7][8][10][17]}
• Caspase-2,^[8][17]
• Caspase-3,^[8][17]
• Caspase-6,^[8][17][18]
• Caspase-7,^[8][17]
• Caspase-9,^[8][17]
• DEDD,^[19][20][21]
• FADD,^{[7][10][13][22][23][24][25]}
• FasL,^[7][10]
• FasR,^[7][11][26]
• IFT57,^[27]
• NOL3,^[28]
• PEA15,^[29][30]
• RIPK1,^[22][31][32]
• TNFRSF10B,^[7][26] and
• TRAF1.^[10][33]

Additional Photos

Signaling pathway of TNF-R1. Dashed grey lines represent multiple steps Overview of signal transduction pathways involved in apoptosis.

See also

• The Proteolysis Map
• FADD
• Caspase

References

1. "Human PubMed Reference:".
2. "Mouse PubMed Reference:".
3. "OrthoMaM phylogenetic marker: CASP8 coding sequence".
4. "Entrez Gene: CASP8 caspase 8, apoptosis-related cysteine peptidase".
5. Chun HJ, Zheng L, Ahmad M, Wang J, Speirs CK, Siegel RM, Dale JK, Puck J, Davis J, Hall CG, Skoda-Smith S, Atkinson TP, Straus SE, Lenardo MJ (2002). "Pleiotropic defects in lymphocyte activation caused by caspase-8 mutations lead to human immunodeficiency". Nature. 419 (6905): 395–9. doi:10.1038/nature01063. PMID 12353035.
6. Ng FW, Nguyen M, Kwan T, Branton PE, Nicholson DW, Cromlish JA, Shore GC (October 1997). "p28 Bap31, a Bcl-2/Bcl-XL- and procaspase-8-associated protein in the endoplasmic reticulum". J. Cell Biol. 139 (2): 327–38. doi:10.1083/jcb.139.2.327. PMC 2139787. PMID 9334338.
7. Gajate C, Mollinedo F (March 2005). "Cytoskeleton-mediated death receptor and ligand concentration in lipid rafts forms apoptosis-promoting clusters in cancer chemotherapy". J. Biol. Chem. 280 (12): 11641–7. doi:10.1074/jbc.M411781200. PMID 15659383.
8. Guo Y, Srinivasula SM, Druilhe A, Fernandes-Alnemri T, Alnemri ES (April 2002). "Caspase-2 induces apoptosis by releasing proapoptotic proteins from mitochondria". J. Biol. Chem. 277 (16): 13430–7. doi:10.1074/jbc.M108029200. PMID 11832478.
9. Poulaki V, Mitsiades N, Romero ME, Tsokos M (June 2001). "Fas-mediated apoptosis in neuroblastoma requires mitochondrial activation and is inhibited by FLICE inhibitor protein and Bcl-2". Cancer Res. 61 (12): 4864–72. PMID 11406564.
10. Micheau O, Tschopp J (July 2003). "Induction of TNF receptor I-mediated apoptosis via two sequential signaling complexes". Cell. 114 (2): 181–90. doi:10.1016/s0092-8674(03)00521-x. PMID 12887920.
11. Shu HB, Halpin DR, Goeddel DV (June 1997). "Casper is a FADD- and caspase-related inducer of apoptosis". Immunity. 6 (6): 751–63. doi:10.1016/s1074-7613(00)80450-1. PMID 9208847.
12. Goltsev YV, Kovalenko AV, Arnold E, Varfolomeev EE, Brodianskii VM, Wallach D (August 1997). "CASH, a novel caspase homologue with death effector domains". J. Biol. Chem. 272 (32): 19641–4. doi:10.1074/jbc.272.32.19641. PMID 9289491.
13. Srinivasula SM, Ahmad M, Ottilie S, Bullrich F, Banks S, Wang Y, Fernandes-Alnemri T, Croce CM, Litwack G, Tomaselli KJ, Armstrong RC, Alnemri ES (July 1997). "FLAME-1, a novel FADD-like anti-apoptotic molecule that regulates Fas/TNFR1-induced apoptosis". J. Biol. Chem. 272 (30): 18542–5. doi:10.1074/jbc.272.30.18542. PMID 9228018.
14. Micheau O, Thome M, Schneider P, Holler N, Tschopp J, Nicholson DW, Briand C, Grütter MG (November 2002). "The long form of FLIP is an activator of caspase-8 at the Fas death-inducing signaling complex". J. Biol. Chem. 277 (47): 45162–71. doi:10.1074/jbc.M206882200. PMID 12215447.
15. Han DK, Chaudhary PM, Wright ME, Friedman C, Trask BJ, Riedel RT, Baskin DG, Schwartz SM, Hood L (October 1997). "MRIT, a novel death-effector domain-containing protein, interacts with caspases and BclXL and initiates cell death". Proc. Natl. Acad. Sci. U.S.A. 94 (21): 11333–8. doi:10.1073/pnas.94.21.11333. PMC 23459. PMID 9326610.
16. Roth W, Stenner-Liewen F, Pawlowski K, Godzik A, Reed JC (March 2002). "Identification and characterization of DEDD2, a death effector domain-containing protein". J. Biol. Chem. 277 (9): 7501–8. doi:10.1074/jbc.M110749200. PMID 11741985.
17. Srinivasula SM, Ahmad M, Fernandes-Alnemri T, Litwack G, Alnemri ES (December 1996). "Molecular ordering of the Fas-apoptotic pathway: the Fas/APO-1 protease Mch5 is a CrmA-inhibitable protease that activates multiple Ced-3/ICE-like cysteine proteases". Proc. Natl. Acad. Sci. U.S.A. 93 (25): 14486–91. doi:10.1073/pnas.93.25.14486. PMC 26159. PMID 8962078.
18. Cowling V, Downward J (October 2002). "Caspase-6 is the direct activator of caspase-8 in the cytochrome c-induced apoptosis pathway: absolute requirement for removal of caspase-6 prodomain". Cell Death Differ. 9 (10): 1046–56. doi:10.1038/sj.cdd.4401065. PMID 12232792.
19. Zhan Y, Hegde R, Srinivasula SM, Fernandes-Alnemri T, Alnemri ES (April 2002). "Death effector domain-containing proteins DEDD and FLAME-3 form nuclear complexes with the TFIIIC102 subunit of human transcription factor IIIC". Cell Death Differ. 9 (4): 439–47. doi:10.1038/sj/cdd/4401038. PMID 11965497.
20. Alcivar A, Hu S, Tang J, Yang X (January 2003). "DEDD and DEDD2 associate with caspase-8/10 and signal cell death". Oncogene. 22 (2): 291–7. doi:10.1038/sj.onc.1206099. PMID 12527898.
21. Stegh AH, Schickling O, Ehret A, Scaffidi C, Peterhänsel C, Hofmann TG, Grummt I, Krammer PH, Peter ME (October 1998). "DEDD, a novel death effector domain-containing protein, targeted to the nucleolus". EMBO J. 17 (20): 5974–86. doi:10.1093/emboj/17.20.5974. PMC 1170924. PMID 9774341.
22. Oshima S, Turer EE, Callahan JA, Chai S, Advincula R, Barrera J, Shifrin N, Lee B, Benedict Yen TS, Yen B, Woo T, Malynn BA, Ma A (February 2009). "ABIN-1 is a ubiquitin sensor that restricts cell death and sustains embryonic development". Nature. 457 (7231): 906–9. doi:10.1038/nature07575. PMC 2642523. PMID 19060883.
23. Henshall DC, Araki T, Schindler CK, Shinoda S, Lan JQ, Simon RP (September 2003). "Expression of death-associated protein kinase and recruitment to the tumor necrosis factor signaling pathway following brief seizures". J. Neurochem. 86 (5): 1260–70. doi:10.1046/j.1471-4159.2003.01934.x. PMID 12911633.
24. Boldin MP, Goncharov TM, Goltsev YV, Wallach D (June 1996). "Involvement of MACH, a novel MORT1/FADD-interacting protease, in Fas/APO-1- and TNF receptor-induced cell death". Cell. 85 (6): 803–15. doi:10.1016/s0092-8674(00)81265-9. PMID 8681376.
25. Thomas LR, Stillman DJ, Thorburn A (September 2002). "Regulation of Fas-associated death domain interactions by the death effector domain identified by a modified reverse two-hybrid screen". J. Biol. Chem. 277 (37): 34343–8. doi:10.1074/jbc.M204169200. PMID 12107169.
26. MacFarlane M, Ahmad M, Srinivasula SM, Fernandes-Alnemri T, Cohen GM, Alnemri ES (October 1997). "Identification and molecular cloning of two novel receptors for the cytotoxic ligand TRAIL". J. Biol. Chem. 272 (41): 25417–20. doi:10.1074/jbc.272.41.25417. PMID 9325248.
27. Gervais FG, Singaraja R, Xanthoudakis S, Gutekunst CA, Leavitt BR, Metzler M, Hackam AS, Tam J, Vaillancourt JP, Houtzager V, Rasper DM, Roy S, Hayden MR, Nicholson DW (February 2002). "Recruitment and activation of caspase-8 by the Huntingtin-interacting protein Hip-1 and a novel partner Hippi". Nat. Cell Biol. 4 (2): 95–105. doi:10.1038/ncb735. PMID 11788820.
28. Koseki T, Inohara N, Chen S, Núñez G (April 1998). "ARC, an inhibitor of apoptosis expressed in skeletal muscle and heart that interacts selectively with caspases". Proc. Natl. Acad. Sci. U.S.A. 95 (9): 5156–60. doi:10.1073/pnas.95.9.5156. PMC 20230. PMID 9560245.
29. Kitsberg D, Formstecher E, Fauquet M, Kubes M, Cordier J, Canton B, Pan G, Rolli M, Glowinski J, Chneiweiss H (October 1999). "Knock-out of the neural death effector domain protein PEA-15 demonstrates that its expression protects astrocytes from TNFalpha-induced apoptosis". J. Neurosci. 19 (19): 8244–51. PMID 10493725.
30. Condorelli G, Vigliotta G, Cafieri A, Trencia A, Andalò P, Oriente F, Miele C, Caruso M, Formisano P, Beguinot F (August 1999). "PED/PEA-15: an anti-apoptotic molecule that regulates FAS/TNFR1-induced apoptosis". Oncogene. 18 (31): 4409–15. doi:10.1038/sj.onc.1202831. PMID 10442631.
31. Chaudhary PM, Eby MT, Jasmin A, Kumar A, Liu L, Hood L (September 2000). "Activation of the NF-kappaB pathway by caspase 8 and its homologs". Oncogene. 19 (39): 4451–60. doi:10.1038/sj.onc.1203812. PMID 11002417.
32. Bertrand MJ, Milutinovic S, Dickson KM, Ho WC, Boudreault A, Durkin J, Gillard JW, Jaquith JB, Morris SJ, Barker PA (June 2008). "cIAP1 and cIAP2 facilitate cancer cell survival by functioning as E3 ligases that promote RIP1 ubiquitination". Mol. Cell. 30 (6): 689–700. doi:10.1016/j.molcel.2008.05.014. PMID 18570872.
33. Leo E, Deveraux QL, Buchholtz C, Welsh K, Matsuzawa S, Stennicke HR, Salvesen GS, Reed JC (March 2001). "TRAF1 is a substrate of caspases activated during tumor necrosis factor receptor-alpha-induced apoptosis". J. Biol. Chem. 276 (11): 8087–93. doi:10.1074/jbc.M009450200. PMID 11098060.

Further reading

• Jia SH, Parodo J, Kapus A, Rotstein OD, Marshall JC (2008). "Dynamic Regulation of Neutrophil Survival through Tyrosine Phosphorylation or Dephosphorylation of Caspase-8". Journal of Biological Chemistry. 283 (9): 5402–5413. doi:10.1074/jbc.M706462200. PMID 18086677.
• Cohen GM (1997). "Caspases: the executioners of apoptosis". Biochem. J. 326 (Pt 1): 1–16. doi:10.1042/bj3260001. PMC 1218630. PMID 9337844.
• Siegel RM, Chan FK, Chun HJ, Lenardo MJ (2001). "The multifaceted role of Fas signaling in immune cell homeostasis and autoimmunity". Nat. Immunol. 1 (6): 469–74. doi:10.1038/82712. PMID 11101867.
• Ye S, Goldsmith EJ (2002). "Serpins and other covalent protease inhibitors". Curr. Opin. Struct. Biol. 11 (6): 740–5. doi:10.1016/S0959-440X(01)00275-5. PMID 11751056.
• Gupta S (2002). "Tumor necrosis factor-alpha-induced apoptosis in T cells from aged humans: a role of TNFR-I and downstream signaling molecules". Exp. Gerontol. 37 (2–3): 293–9. doi:10.1016/S0531-5565(01)00195-4. PMID 11772515.
• Pomerantz RJ (2004). "Effects of HIV-1 Vpr on neuroinvasion and neuropathogenesis". DNA Cell Biol. 23 (4): 227–38. doi:10.1089/104454904773819815. PMID 15142380.
• Zhao LJ, Zhu H (2005). "Structure and function of HIV-1 auxiliary regulatory protein Vpr: novel clues to drug design". Curr. Drug Targets Immune Endocr. Metabol. Disord. 4 (4): 265–75. doi:10.2174/1568008043339668. PMID 15578977.

External links

• The MEROPS online database for peptidases and their inhibitors: C14.009
• Apoptosis & Caspase 8 - The Proteolysis Map-animation
• Caspase 8 at the US National Library of Medicine Medical Subject Headings (MeSH)
• caspase-8