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CC123 | Caspase 8, recombinant human active

25 units  
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      Replacement Information

      Key Specifications Table

      Key ApplicationsEntrez Gene NumberSpeciesUni Prot Number
      ACT NM_001080124.1, NM_001080125.1, NM_001228.4, NM_033355.3, NM_033356.3, NM_033358.3 Human Q14790
      Catalogue NumberCC123
      Brand Family Chemicon®
      Trade Name
      • Chemicon
      DescriptionCaspase 8, recombinant human active
      OverviewThe active recombinant human caspase-8 was expressed in E. coli. The expressed caspase-8 spontaneously undergoes autoprocessing to yield the subunits characteristic of the active enzyme. The recombinant caspase-8 preferentially cleaves the substrates consisting of consensus sequence IETD (e.g., IETD-AFC and IETD-pNA). The recombinant enzyme can also be used as a positive control in caspase assays or in determining the specificty of caspase substrates.Recommended usage: 0.5-1 unit for fluorometric caspase assays and 2-4 units for colorimetric caspase assays. Optimal working dilutions must be determined by end user.
      Alternate Names
      • FLICE
      • MASH
      • Mch5
      Background InformationCaspase-8 is a member of the interleukin-1β converting enzyme (ICE) family of cysteine proteases. As with other caspases, caspase-8 also exists in cells as an inactive proenzyme. During apoptosis procaspase-8 is processed at aspartate residues by self-proteolysis and/or cleavage by another caspase. The processed form of caspase-8 consists of large and small subunits which associate to form the active enzyme. The active caspase-8 has been shown to be involved in the proteolysis of poly (ADP-ribose) polymerase (PARP), an enzyme that is involved in DNA repair and genomic maintenance.
      Product Information
      PresentationLyophilized. Reconstitute with 25 μl PBS containing 15% glycerol.
      Key Applications
      • Activity Assay
      Application NotesRecommended usage: 0.5-1 unit for fluorometric caspase assays and 2-4 units for colorimetric caspase assays.

      Optimal working dilutions must be determined by end user.
      Biological Information
      Specific Activity25 U: * Where one unit of the recombinant caspase-8 is the enzyme activity that cleaves 1 nmol of the caspase substrate IETD-pNA (pNA: pnitroanaline) per hour at 37°C in a reaction solution containing 50 mM HEPES, 50 mM NaCl, 0.1% CHAPS, 10 mM EDTA, 5% Glycerol, and 10 mM DTT.
      Entrez Gene Number
      Entrez Gene SummaryThis 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.
      Gene Symbol
      • CASP8
      • MCH5
      • MGC78473
      • CASP-8
      • MACH
      • ALPS2B
      • FLICE
      • procaspase-8
      • CAP4
      • EC [Contains: Caspase-8 subunit p18
      • Caspase-8 subunit p10].
      UniProt Number
      UniProt SummaryFUNCTION: SwissProt: Q14790 # Most upstream protease of the activation cascade of caspases responsible for the TNFRSF6/FAS mediated and TNFRSF1A induced cell death. Binding to the adapter molecule FADD recruits it to either receptor. The resulting aggregate called death- inducing signaling complex (DISC) performs CASP8 proteolytic activation. The active dimeric enzyme is then liberated from the DISC and free to activate downstream apoptotic proteases. Proteolytic fragments of the N-terminal propeptide (termed CAP3, CAP5 and CAP6) are likely retained in the DISC. Cleaves and activates CASP3, CASP4, CASP6, CASP7, CASP9 and CASP10. May participate in the GZMB apoptotic pathways. Cleaves ADPRT. Hydrolyzes the small-molecule substrate, Ac-Asp-Glu-Val-Asp- -AMC. Likely target for the cowpox virus CRMA death inhibitory protein. Isoforms 5, 6, 7 and 8 lack the catalytic site and may interfere with the pro-apoptotic activity of the complex.
      SIZE: 479 amino acids; 55391 Da
      SUBUNIT: Heterotetramer that consists of two anti-parallel arranged heterodimers, each one formed by a 18 kDa (p18) and a 10 kDa (p10) subunit. Interacts with FADD, CFLAR and PEA15. Isoform 9 interacts at the endoplasmic reticulum with a complex containing BCAP31, BAP29, BCL2 and/or BCL2L1.
      TISSUE SPECIFICITY: Isoforms 1, 5 and 7 are expressed in a wide variety of tissues. Highest expression in peripheral blood leukocytes, spleen, thymus, and liver. Barely detectable in brain, testis, and skeletal muscle.DOMAIN:SwissProt: Q14790 Isoform 9 contains a N-terminal extension that is required for interaction with the BCAP31 complex.
      PTM: Generation of the subunits requires association with the death-inducing signaling complex (DISC), whereas additional processing is likely due to the autocatalytic activity of the activated protease. GZMB and CASP10 can be involved in these processing events. & Phosphorylated upon DNA damage, probably by ATM or ATR.
      DISEASE: SwissProt: Q14790 # Defects in CASP8 are the cause of caspase-8 deficiency (CASP8D) [MIM:607271]. CASP8D is a disorder resembling autoimmune lymphoproliferative syndrome (ALPS). It is characterized by lymphadenopathy, splenomegaly, and defective CD95-induced apoptosis of peripheral blood lymphocytes (PBLs). It leads to defects in activation of T-lymphocytes, B-lymphocytes, and natural killer cells leading to immunodeficiency characterized by recurrent sinopulmonary and herpes simplex virus infections and poor responses to immunization.
      SIMILARITY: Belongs to the peptidase C14 family. & Contains 2 DED (death effector) domains.
      Physicochemical Information
      Materials Information
      Toxicological Information
      Safety Information according to GHS
      Safety Information
      Product Usage Statements
      Usage Statement
      • Unless otherwise stated in our catalog or other company documentation accompanying the product(s), our products are intended for research use only and are not to be used for any other purpose, which includes but is not limited to, unauthorized commercial uses, in vitro diagnostic uses, ex vivo or in vivo therapeutic uses or any type of consumption or application to humans or animals.
      Storage and Shipping Information
      Storage ConditionsMaintain at -70°C for 3-6 months. Avoid repeated freeze/thaw cycles.
      Packaging Information
      Material Size25 units
      Transport Information
      Supplemental Information




      Safety Data Sheet (SDS) 

      Certificates of Analysis

      TitleLot Number


      Reference overviewPub Med ID
      High molecular weight vimentin complex is formed after proteolytic digestion of vimentin by caspase-3: detection by sera of patients with interstitial pneumonia.
      Fujita, Jiro, et al.
      Microbiol. Immunol., 47: 447-51 (2003) 2003

      Show Abstract
      12906105 12906105
      Specific caspase pathways are activated in the two stages of cerebral infarction.
      A Benchoua,C Guégan,C Couriaud,H Hosseini,N Sampaïo,D Morin,B Onténiente
      The Journal of neuroscience : the official journal of the Society for Neuroscience 21 2001

      Show Abstract
      11549723 11549723

      Data Sheet

      Caspase 8, recombinant human active - Data Sheet

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      Life Science Research > Proteins and Enzymes > Other Enzymes