Recombinant Human Caspase-10 (Mch 4) Protein, CF
Recombinant Human Caspase-10 (Mch 4) Protein, CF Summary
Val220-Ile479, with a C-terminal 6-His tag
CF stands for Carrier Free (CF). We typically add Bovine Serum Albumin (BSA) as a carrier protein to our recombinant proteins. Adding a carrier protein enhances protein stability, increases shelf-life, and allows the recombinant protein to be stored at a more dilute concentration. The carrier free version does not contain BSA.
In general, we advise purchasing the recombinant protein with BSA for use in cell or tissue culture, or as an ELISA standard. In contrast, the carrier free protein is recommended for applications, in which the presence of BSA could interfere.
|Formulation||Supplied as a 0.2 μm filtered solution in HEPES, NaCl and Sucrose.|
|Shipping||The product is shipped with dry ice or equivalent. Upon receipt, store it immediately at the temperature recommended below.|
|Stability & Storage:||Use a manual defrost freezer and avoid repeated freeze-thaw cycles.
- Assay Buffer: 25 mM HEPES, 0.1% CHAPS (w/v), 10 mM DTT, pH 7.5
- Recombinant Human Caspase‑10 (Mch4) (rhCaspase-10) (Catalog # 834-CP)
- Substrate: Ac-Leu-Glu-His-Asp-AFC (MP Biomedicals, Catalog # 199445), 10 mM stock in DMSO
- F16 Black Maxisorp Plate (Nunc, Catalog # 475515)
- Fluorescent Plate Reader (Model: SpectraMax Gemini EM by Molecular Devices) or equivalent
- Dilute rhCaspase-10 to 20 ng/µL in Assay Buffer.
- Dilute Substrate to 100 µM in Assay Buffer.
- Load into a plate 50 µL of 20 ng/µL rhCaspase-10 and start the reaction by adding 50 µL of 100 µM Substrate. Include a Substrate Blank containing 50 µL of Assay Buffer and 50 µL of 100 µM Substrate.
- Read at excitation and emission wavelengths of 400 nm and 505 nm (top read), respectively, in kinetic mode for 10 minutes.
- Calculate specific activity using data from minutes 5 - 10 only:
Specific Activity (pmol/min/µg) =
|Adjusted Vmax* (RFU/min) x Conversion Factor** (pmol/RFU)|
|amount of enzyme (µg)|
*Adjusted for Substrate Blank
**Derived using calibration standard 7-amino, 4-(trifluoromethyl)coumarin (Calbiochem, Catalog #164580).
- rhCaspase-10: 1 µg
- Substrate: 50 µM
Caspase-10 (also known as Mch4 and FLICE2) is a 28‑29 kDa member of the peptidase C14A family of enzymes (1‑4). It is widely expressed, being found in dendritic cells, T and B cells, neurons, keratinocytes, and intestinal epithelium (5‑8). Caspase-10 appears to be an initiator caspase, and is known to act on a select number of substrates, including Bid, ABCF1, AKAP1, PARP, HSP90 beta and procaspases-3, 4, 6, 7, and 9 (1, 2, 9‑12). There are several alternatively spliced forms of human Caspase‑10, and all forms contains the same pro region (aa 1‑219) with two death effector domains (DEDs) (SwissProt # Q92851). Recombinant Human Caspase-10 (Mch4) corresponds to the mature region of isoform B and is based on the sequence described by Fernandes‑Alnemri et al. (4). Normally, procaspase‑10 is an inactive, cytosolic monomer (2, 9). But following DED containing receptor trimerization, procaspase‑10 is recruited to a complex termed DISC that forms around the death domains of the oligomerized receptor (1, 2, 9, 13). FADD is recruited first, followed by both procaspase‑10 and 8. The recruitment, or concentration, of both procaspase‑8 and ‑10 induces their homodimerization and activation. The actual activation of Caspase‑10 can occur either through homodimerization and self‑cleavage, or caspase‑8‑induced cleavage (9, 11, 12). Cleavage initially generates a 43 kDa (p43) N‑terminal and an 12 kDa (p12) C‑terminal fragment. The p43 subunit is next cleaved at Asp219‑Val220 to generate a 25 kDa (p25) DED‑containing prodomain and a 17 kDa mature p17 subunit (14). p17 and p12 noncovalently associate to form a 29 kDa heterodimer, which subsequently associates with another p17/p12 heterodimer to form an active, mature Caspase-10 molecule. This leaves the DISC to act on downstream substrates. There does not appear to be a mouse gene equivalent to the human CASP10 gene (15).
- Chowdhury, I. et al. (2008) Comp. Biochem. Physiol. B 151:10.
Boatright, K.M. & G.S. Salvesen (2003 Curr. Opin. Cell Biol. 15:725.
Valmiki, M.G. & J.W. Ramos (2009) Cell. Mol. Life Sci. 66:814.
Fernandes-Alnemri, T. et al. (1996) Proc. Natl. Acad. Sci. USA 93:7464.
Wang, J. et al. (2001) Proc. Natl. Acad. Sci. USA 98:13884.
Grossmann, J. et al. (1998) Am. J. Physiol. 274:G1117.
Marconi, A. et al. (2004) J. Cell Sci. 117:5815.
Nunnari, G. et al. (2005) J. Neurovirol. 11:319.
Chen, M. & J. Wang (2002) Apoptosis 7:313.
Bae, S. et al. (2008) Int. J. Mol. Med. 21:381.
Milhas, D. et al. (2005) J. Biol. Chem. 280:19836.
Chen, H. et al. (2009) Mol. Cell. Biol. 29:3657.
Tibbetts, M.D. et al. (2003) Nat. Immunol. 4:404.
Sprick, M.R. et al. (2002) EMBO J. 21:4520.
- Reed, J.C. et al. (2003) Genome Res. 13:1376.
Citation for Recombinant Human Caspase-10 (Mch 4) Protein, CF
R&D Systems personnel manually curate a database that contains references using R&D Systems products. The data collected includes not only links to publications in PubMed, but also provides information about sample types, species, and experimental conditions.
1 Citation: Showing 1 - 1
Fine-tuning nucleophosmin in macrophage differentiation and activation.
Authors: Guery L, Benikhlef N, Gautier T, Paul C, Jego G, Dufour E, Jacquel A, Cally R, Manoury B, Vanden Berghe T, Vandenabeele P, Droin N, Solary E
Sample Types: Recombinant Protein
Applications: Enzyme Assay
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