Product Details

Purity

Greater than 90% as determined by SDS-PAGE.

Target Names

CASP8

Uniprot No.

Q14790

Research Area

Apoptosis

Alternative Names

ALPS2B; Amyotrophic lateral sclerosis 2 chromosomal region candidate gene 12 protein; Apoptosis related cysteine peptidase; Apoptotic cysteine protease; Apoptotic protease Mch-5; Apoptotic protease Mch5; CAP 4; CAP4; CASP-8; CASP8; CASP8_HUMAN; Caspase 8; Caspase 8 apoptosis related cysteine peptidase; Caspase IIX; Caspase-8 subunit p10; caspase8; CED 3; FADD Homologous ICE/CED3 Like Protease; FADD Like ICE; FADD-homologous ICE/CED-3-like protease; FADD-like ICE; FLICE; FLJ17672; ICE-like apoptotic protease 5; MACH alpha 1/2/3 protein; MACH; MACH beta 1/2/3/4 protein; MACH5; MCH 5; MCH5; MGC78473; MORT1 associated ced 3 homolog; MORT1 associated CED3 homolog; MORT1-associated CED-3 homolog; OTTHUMP00000163717; OTTHUMP00000163720; OTTHUMP00000163724; OTTHUMP00000163725; OTTHUMP00000165062; OTTHUMP00000165063; OTTHUMP00000165064; OTTHUMP00000206552; OTTHUMP00000206582

Species

Homo sapiens (Human)

Source

E.coli

Expression Region

217–374aa

Target Protein Sequence

SESQTLDKVYQMKSKPRGYCLIINNHNFAKAREKVPKLHSIRDRNGTHLDAGALTTTFEELHFEIKPHDDCTVEQIYEILKIYQLMDHSNMDCFICCILSHGDKGIIYGTDGQEAPIYELTSQFTGLKCPSLAGKPKVFFIQACQGDNYQKGIPVETD
Note: The complete sequence may include tag sequence, target protein sequence, linker sequence and extra sequence that is translated with the protein sequence for the purpose(s) of secretion, stability, solubility, etc.
If the exact amino acid sequence of this recombinant protein is critical to your application, please explicitly request the full and complete sequence of this protein before ordering.

Mol. Weight

21.9kDa

Protein Length

Partial

Tag Info

N-terminal 6xHis-tagged

Form

Liquid or Lyophilized powder
Note: We will preferentially ship the format that we have in stock, however, if you have any special requirement for the format, please remark your requirement when placing the order, we will prepare according to your demand.

Buffer

If the delivery form is liquid, the default storage buffer is Tris/PBS-based buffer, 5%-50% glycerol.
Note: If you have any special requirement for the glycerol content, please remark when you place the order.
If the delivery form is lyophilized powder, the buffer before lyophilization is Tris/PBS-based buffer, 6% Trehalose.

Reconstitution

We recommend that this vial be briefly centrifuged prior to opening to bring the contents to the bottom. Please reconstitute protein in deionized sterile water to a concentration of 0.1-1.0 mg/mL.We recommend to add 5-50% of glycerol (final concentration) and aliquot for long-term storage at -20°C/-80°C. Our default final concentration of glycerol is 50%. Customers could use it as reference.

Troubleshooting and FAQs

Protein FAQs

Storage Condition

Store at -20°C/-80°C upon receipt, aliquoting is necessary for mutiple use. Avoid repeated freeze-thaw cycles.

Shelf Life

The shelf life is related to many factors, storage state, buffer ingredients, storage temperature and the stability of the protein itself.
Generally, the shelf life of liquid form is 6 months at -20°C/-80°C. The shelf life of lyophilized form is 12 months at -20°C/-80°C.

Lead Time

3-7 business days

Notes

Repeated freezing and thawing is not recommended. Store working aliquots at 4°C for up to one week.

Datasheet & COA

Please contact us to get it.

Description

Our Recombinant Human CASP8 protein provides an exceptional tool for the study of apoptosis and related biological processes. Caspase-8, or CASP-8, is a crucial component in the extrinsic apoptotic pathway, functioning as an initiator caspase to promote cell death. Sourced from E. coli, this product encompasses a partial CASP8 protein sequence (217-374aa) and features an N-terminal 6xHis tag for efficient protein purification and detection.

The Recombinant Human CASP8 protein boasts a purity greater than 90% as determined by SDS-PAGE, ensuring the highest quality for your apoptosis research. Supplied as a lyophilized powder, our CASP8 protein delivers consistent and reliable results, facilitating in-depth investigation of cell death mechanisms, cancer biology, and other apoptotic pathways.

Target Background

Function

Thiol protease that plays a key role in programmed cell death by acting as a molecular switch for apoptosis, necroptosis and pyroptosis, and is required to prevent tissue damage during embryonic development and adulthood. Initiator protease that induces extrinsic apoptosis by mediating cleavage and activation of effector caspases responsible for the TNFRSF6/FAS mediated and TNFRSF1A induced cell death. Cleaves and activates effector caspases CASP3, CASP4, CASP6, CASP7, CASP9 and CASP10. Binding to the adapter molecule FADD recruits it to either receptor TNFRSF6/FAS mediated or TNFRSF1A. 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. In addition to extrinsic apoptosis, also acts as a negative regulator of necroptosis: acts by cleaving RIPK1 at 'Asp-324', which is crucial to inhibit RIPK1 kinase activity, limiting TNF-induced apoptosis, necroptosis and inflammatory response. Also able to initiate pyroptosis by mediating cleavage and activation of gasdermin-D (GSDMD): GSDMD cleavage promoting release of the N-terminal moiety (Gasdermin-D, N-terminal) that binds to membranes and forms pores, triggering pyroptosis. Initiates pyroptosis following inactivation of MAP3K7/TAK1. Also acts as a regulator of innate immunity by mediating cleavage and inactivation of N4BP1 downstream of TLR3 or TLR4, thereby promoting cytokine production. May participate in the Granzyme B (GZMB) cell death pathways. Cleaves PARP1.; Lacks the catalytic site and may interfere with the pro-apoptotic activity of the complex.; Lacks the catalytic site and may interfere with the pro-apoptotic activity of the complex.; Lacks the catalytic site and may interfere with the pro-apoptotic activity of the complex. Acts as an inhibitor of the caspase cascade.; Lacks the catalytic site and may interfere with the pro-apoptotic activity of the complex.

Gene References into Functions

The caspase 8 mediated RIPK1 cleavage product has a pro-apoptotic function, and further cleavage of this pro-apoptotic cleavage product by human rhinovirus 3C protease may provide a mechanism by which human rhinovirus limits apoptosis. PMID: 29371673
results suggest that miR-21 regulates the apoptosis of keloid fibroblasts via targeting FasL, and caspase-8 and the mitochondria-mediated apoptotic signaling pathway is involved in this process. PMID: 29527928
neither rs13416436 nor rs2037815 associated with pre-eclampsia PMID: 28110598
High CASP8 expression is associated with Colorectal Cancer. PMID: 29801534
Sleep duration is associated with plasma caspase-8. Caspase-8 independently predicts diabetes mellitus years before disease onset and modifies the effect of sleep duration on incident diabetes mellitus. PMID: 29409058
Reactive oxygen species-induced cleavage of NHLRC2 by caspase-8 leads to apoptotic cell death in the HCT116 human colon cancer cells. PMID: 29242562
this study is the first report on reduced expression of CASP8 in breast cancer versus adjacent normal tissues. PMID: 29233452
The polymorphisms of CASP8, rs7608692, and haplotype AGAACAG correlated with neutropenia toxicity. The haplotype GGGGAAA was associated with thrombocytopenia toxicity. We conclude that the polymorphisms of CASP8 contribute to the prognosis of advanced lung adenocarcinoma and influence the quality of life and survival. PMID: 28278082
These results indicated that cMyc and Fas regulated the sensitivity of A549 cells to irradiation by regulating caspase8-mediated Bid activation and the subsequent association with the mitochondrial pathway of apoptosis. PMID: 28849062
miR-21 was elevated in osteosarcoma, and overexpression of miR-21 suppressed apoptosis via targeting caspase 8. PMID: 28109080
Our findings indicate the relationship of SNP CASP8 D302H and breast cancer would not be universal but only be sensitive in some particular European countries. PMID: 28674227
no mutations were detected in the CASP8 gene, but we observed a frequent [32/48 (66.6%)] SNP [rs1045487] in the oral cancer samples. PMID: 28181739
case-control study, including 600 hepatocellular carcinoma (HCC) and 600 HBsAg positive controls without HCC, was conducted to assess the relationship between 11 tagging SNPs in CASP8, CASP10 and CFLAR and HBV-related HCC risk .These results suggest that the CASP8 -652 6N ins/del polymorphism may play a protective role in the development, progression, and survival of HBV-related HCC among the Chinese Han population. PMID: 28643196
High caspase-8 is not significantly associated with adverse breast cancer-specific survival. No associations were observed between caspase-8 and clinicopathological criteria. PMID: 27798717
we found that plumbagin could enhance TRAIL-induced apoptosis in Kasumi-1 cells, and the mechanisms include ROS-mediated upregulation of DR5 expression, caspase-8 activation and inhibition of cFLIP expression PMID: 28498435
this study shows that mitochondrial DNA oxidation induces imbalanced activity of NLRP3/NLRP6 inflammasomes by activation of caspase-8 and BRCC36 in dry eye PMID: 28238526
Importantly, the bioinformatics analysis of microarray gene expression data derived from a set of high-grade human gliomas, shows that high Caspase-8 expression levels correlate with a worse prognosis. PMID: 28594322
this review describes the role of caspase-8 in the initiation of extrinsic apoptosis execution and the mechanism by which caspase-8 inhibits necroptosis PMID: 28462525
Data indicate that elevated levels of Polo-like kinase 3 (Plk3)and pT273 caspase-8 are correlated with favorable clinical outcome in patients with anal squamous cell carcinoma (anal SCC) treated with concomitant chemoradiotherapy (CRT). PMID: 27462786
Caspase-8 binding via FADD to the receptor is an indispensable initiating step in death-inducing signaling complex formation and NF-kB activation. PMID: 28445729
The procaspase-8 Q482H mutation in AML patients abolishes caspase-8-mediated apoptosis by impairing procaspase-8 dimerization. PMID: 29191655
These findings suggest that intracellular cholesterol level affects TMZ treatment of GBM mediated via a DR5-caspase-8 mechanism. PMID: 29162448
study shows genetic association of rare variants in CASP8 with Alzheimer's disease and proposes a mechanism of action mediated by decreased enzyme activity; for two CASP8 variants, p.K148R and p.I298V, the association remained significant in a large combined sample PMID: 28985224
Knockout (KO) or knockdown of caspase-8, CD95 or FADD prevents activation of Plk3 upon CD95 stimulation, suggesting a requirement of a functional death-inducing signaling complex for Plk3 activation. PMID: 27325299
SP-D increases the formation of nuclear and membrane blebs. Inhibition of caspase-8 confirms the effect of SP-D is unique to the caspase-8 pathway. PMID: 29107869
Results illustrate the temporal and spatial activation of caspase-8 and -3 in microglia/macrophages occurring upon ischemic stroke and suggest that the expression of these caspases could be used in neuropathological diagnostic work. PMID: 27566702
This is the first report, showing negative and independent prognostic impact of the CASP8 -652 6N Del and the 302His variant for breast cancer. PMID: 27507139
Data suggest that pro-death signals through TIR-domain-containing adapter-inducing interferon-beta (TRIF) are regulated by autophagy and propose that pro-apoptotic signalling through TRIF/RIPK1/caspase-8 occurs in fibrillary platforms. PMID: 28453927
caspase-8-dependent apoptosis was linked to hepatocellular carcinoma development. PMID: 28898696
Insertion genotype of CASP8 rs3834129 polymorphisms showed risk in CAD. CASP8 rs3769818 activates intronic cryptic donor. PMID: 28633917
Caspase-8 controls the secretion of inflammatory lysyl-tRNA synthetase in exosomes from colorectal cancer cells. PMID: 28611052
Fisetin inhibited Triple-Negative Breast Cancer Cells cell division and induced apoptosis, which was associated with mitochondrial membrane permeabilization and the activation of caspase-9 and caspase-8, as well as the cleavage of poly(ADP-ribose) polymerase-1. PMID: 26755433
Caspase-8 can serve in two distinct roles in response to TRAIL receptor engagement, as a scaffold for assembly of a Caspase-8-FADD-RIPK1 "FADDosome" complex, leading to NFkappaB-dependent inflammation, or as a protease that promotes apoptosis. PMID: 28212752
Using the tDED filament structure as a template, structural analyses reveal the interaction surfaces between FADD and caspase-8 and the distinct mechanisms of regulation by cFLIP and MC159 through comingling and capping, respectively. PMID: 27746017
our novel findings expand our understanding of the key mechanisms underlying the anti-apoptotic functions of caspase-8 which may act as a critical block to existing antitumour therapies. PMID: 27109099
Dasatinib, a c-Src inhibitor, dephosphorylated caspase-8 to facilitate necroptosis, rather than apoptosis, in paclitaxel-treated p-Casp8-expressing lung adenocarcinoma cells. PMID: 27195913
Loss of function mutations in FAT1 and CASP8 prevent cell adhesion and promote cell migration and proliferation in oral squamous cell carcinoma cell lines. PMID: 27693639
Dysregulation of a potassium channel, THIK-1, targeted by caspase-8, accelerates cell shrinkage. PMID: 27566292
caspase-8 and caspase-9 contribute to the cyclic stretch-induced apoptosis, but functioned differently at different stages in human periodontal ligament cells PMID: 27942018
Down-regulation of mRNA expression was found in cases in which CASP8, TMS1 and DAPK were hypermethylated. PMID: 28361856
sorafenib overcomes TRAIL resistance in renal cell carcinoma by a mechanism that does not rely on Mcl-1 down-regulation but involves ROS accumulation and increased activation of caspase-8 PMID: 28154184
autoinflammation-associated H443P nlrc4 mutant is altered in interaction with SUG1 and ubiquitinated proteins, triggering constitutive caspase-8-mediated cell death dependent on FADD but independent of Ser(533) phosphorylation. PMID: 27974463
Caspase-8 is phosphorylated on Tyr380 in a Src kinase dependent manner and this phosphorylation is required for transformation and it is enhanced by hypoxic conditions. PMID: 27432652
Our results revealed that caspase-8 gene silencing may result from the methylation of its gene promoter in human glioma tissues. The expression of caspase-8 at the mRNA level was significantly associated with the grade of human glioma. PMID: 28204824
Suggest that caspase 8 SNPs were not associated with rheumatoid arthritis. PMID: 26905515
novel dynamic interplay between Src and caspase-8 likely acts as a potent signal-integrating switch directing the cell towards apoptosis or survival PMID: 27101103
Findings showed that, in MDA-MB-231 cells, casp-8 might play some unusual roles which should be better explored, in order to understand whether it might be identified as a molecular therapeutic target. PMID: 27082853
Study showed that TRAIL and caspase-8 expression decreased in human osteosarcoma, resulting in increased cell proliferation, and reduced cell apoptosis suggesting they play important roles in the occurrence, development, and prognosis of osteosarcoma. PMID: 28002586
evidence that Articulatin-D efficiently activates caspase-8 involved in extrinsic pathway of apoptosis induction, which ultimately results in caspase-3-dependent DNA fragmentation of Jurkat cells. PMID: 27868169
our findings indicate that the expression levels of P-GP, MYC, caspase-8, and AKT3 are candidate biomarkers of cell sensitivity to PLKis. PMID: 27699933

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Involvement in disease

Caspase-8 deficiency (CASP8D)

Subcellular Location

Cytoplasm. Nucleus.

Protein Families

Peptidase C14A family

Tissue Specificity

Isoform 1, isoform 5 and isoform 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.

Database Links

HGNC: 1509

OMIM: 211980

KEGG: hsa:841

STRING: 9606.ENSP00000351273

UniGene: Hs.599762

Code	CSB-EP621791HU
Abbreviation	Recombinant Human CASP8 protein, partial
MSDS	MSDS Datasheet
Size	$224
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Image	(Tris-Glycine gel) Discontinuous SDS-PAGE (reduced) with 5% enrichment gel and 15% separation gel.
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Recombinant Human Caspase-8 (CASP8), partial

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