Human Caspase 8/CASP8 ELISA Kit PicoKine® (96 Tests). Quantitate Human CASP8 in cell culture supeatantsand serum. Sensitivity: 10pg/ml. The brand Picokine indicates this is a premium quality ELISA kit. Each Picokine kit delivers precise quantification, high sensitivity, and excellent reproducibility. Only our most reliable and effective kits qualify as Picokine, guaranteeing top-tier results for your assays.
There is no detectable cross-reactivity with other relevant proteins.
Specificity
Natural and recombinant human Caspase 8
Subcellular Localization
Cytoplasm.
Sample Type
Cell culture supeatants, Serum
Anticoagulant
/
Precision
Intra-Assay Precision
Inter-Assay Precision
Sample
1
2
3
1
2
3
n
16
16
16
24
24
24
Mean (pg/ml)
89
257
911
90
251
854
Standard deviation
6.49
16.44
46.46
6.57
20.58
46.11
CV (%)
6.4%
6.4%
5.4%
7.3%
8.2%
5.4%
Protein Function
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. Isoform 5, isoform 6, isoform 7 and isoform 8 lack the catalytic site and may interfere with the pro-apoptotic activity of the complex. .
Background
Caspase-8 is a caspase protein, encoded by the CASP8 gene. It is mapped to human chromosome 2q33-q34 and mouse chromosome 1B-proximal C. This 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 inteal 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. And 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 alteatively spliced transcript variants encoding different isoforms have been described, although not all variants have had their full-length sequences determined.
Reproducibility
Lots
Lot 1 (pg/ml)
Lot 2 (pg/ml)
Lot 3 (pg/ml)
Lot 4 (pg/ml)
Mean (pg/ml)
Standard Deviation
CV (%)
Sample 1
89
99
100
96
96
4.3
4.4%
Sample 2
257
285
267
304
278
17.93
6.4%
Sample 3
911
915
904
795
881
49.95
5.6%
*number of samples for each test n=16.
Notes
Material Required But Not Provided: Microplate Reader capable of reading absorbance at 450nm. Incubator. Automated plate washer . Pipettes and pipette tips capable of precisely dispensing 0.5 µl through 1 ml volumes of aqueous solutions. Multichannel pipettes are recommended for large amount of samples. Deionized or distilled water. 500ml graduated cylinders. Test tubes for dilution.
Gene ID
841
Gene Name
CASP8
UniProt ID
Q14790
Protein Name
Caspase-8
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.
Applications
ELISA
Research Area
Metabolism,Pathways and Processes,Apoptosis,Cancer,Cell Biology,Intracellular,Cell Death,Metabolism Processes,Proteolysis/Ubiquitin,Invasion/Microenvironment,Caspases,Proteolytic Enzymes,Apoptotic Markers
Storage
Store at 4°C for 6 months, at -20°C for 12 months. Avoid multiple freeze-thaw cycles (Ships with gel ice, can store for up to 3 days in room temperature. Freeze upon receiving.)
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