Recombinant Human TACE/ADAM17 Protein, CF Summary
| Details of Functionality |
Measured by its ability to cleave a fluorogenic peptide substrate Mca-PLAQAV-Dpa-RSSSR-NH 2 (Catalog # ES003). The specific activity is >500 pmol/min/µg, as measured under the described conditions. |
| Source |
Spodoptera frugiperda, Sf 21 (baculovirus)-derived human TACE/ADAM17 protein Arg215-Asn671, with a C-terminal 6-His tag |
| Accession # |
|
| N-terminal Sequence |
Arg215 |
| Structure / Form |
Mature form. Recombinant Human TACE/ADAM17 may be prone to proteolytic cleavage at C-terminus. The poly-His tag may not be present in the preparation.
|
| Protein/Peptide Type |
Recombinant Enzymes |
| Gene |
ADAM17 |
| Purity |
>90%, by SDS-PAGE under reducing conditions and visualized by silver stain |
| Endotoxin Note |
<1.0 EU per 1 μg of the protein by the LAL method. |
Applications/Dilutions
| Dilutions |
|
| Theoretical MW |
52 kDa. Disclaimer note: The observed molecular weight of the protein may vary from the listed predicted molecular weight due to post translational modifications, post translation cleavages, relative charges, and other experimental factors. |
| SDS-PAGE |
64 kDa, reducing conditions |
| Publications |
Read Publications using 930-ADB in the following applications:
|
|
Packaging, Storage & Formulations
| Storage |
Use a manual defrost freezer and avoid repeated freeze-thaw cycles. 6 months from date of receipt, -20 to -70 degreesC as supplied. 3 months, -20 to -70 degreesC under sterile conditions after reconstitution. |
| Buffer |
Lyophilized from a 0.2 μm filtered solution in Tris, NaCl and Brij-35. |
| Purity |
>90%, by SDS-PAGE under reducing conditions and visualized by silver stain |
| Reconstitution Instructions |
Reconstitute at 0.2 mg/mL in sterile, deionized water. |
| Assay Procedure |
- Assay Buffer: 25 mM Tris, 2.5 μM ZnCl2, 0.005% Brij-35 (w/v), pH 9.0 (note: It is extremely important that the assay solution does not contain salt (CaCl2, NaCl, Na2SO4) because it inhibits TACE activity).
- Recombinant Human TACE/ADAM17 (rhTACE) (Catalog # 930-ADB)
- Substrate: MCA-Pro-Leu-Ala-Gln-Ala-Val-DPA-Arg-Ser-Ser-Ser-Arg-NH2 (Catalog # ES003) , 2 mM stock in DMSO
- F16 Black Maxisorp Plate (Nunc, Catalog # 475515)
- Fluorescent Plate Reader (Model: SpectraMax Gemini EM by Molecular Devices) or equivalent
- Dilute rhTACE to 0.2 ng/µL in Assay Buffer.
- Dilute Substrate to 20 µM in Assay Buffer.
- In a plate load 50 µL of 0.2 ng/µL rhTACE and start the reaction by adding 50 µL of 20 µM Substrate. Include a Substrate Blank containing 50 μL Assay Buffer and 50 µL Substrate.
- Read at excitation and emission wavelengths of 320 nm and 405 nm (top read), respectively in kinetic mode for 5 minutes.
- Calculate specific activity:
|
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 MCA-Pro-Leu-OH (Bachem, Catalog # M-1975). Per Well:
rhTACE: 0.01 µg
Substrate: 10 µM |
Notes
This product is produced by and ships from R&D Systems, Inc., a Bio-Techne brand.
Alternate Names for Recombinant Human TACE/ADAM17 Protein, CF
Background
TACE is a member of the ADAM family that contains A Disintegrin And Metalloprotease-like domain. Like other membrane-anchored ADAMs, TACE consists of a pro domain with a cysteine switch and furin cleavage sequence, a catalytic domain with the zinc-binding site and Met-turn expected for reprolysins, a disintegrin-like domain, a cysteine-rich domain, an EGF-like domain, a transmembrane domain, and the cytoplasmic domain. In addition to its ability to release the 17 kDa extracellular form of tumor necrosis factor-alpha (TNF-alpha ) from the 26 kDa membrane-anchored TNF-alpha , TACE also plays an essential role in shedding ectodomains from a variety of proteins such as L-Selectin, Transforming Growth Factor-alpha , Amyloid Protein Precursor, and Notch-1 receptor. TACE mRNA is present in virtually every tissue and TACE protein resides both on the cell surface and in the cell.
- Black, R.A. and J.D. Becherer (1998) in Tumor Necrosis Factor alpha -Converting Enzyme. Barrett, A.J. et al. (eds): Handbook of Proteolytic Enzymes, San Diego: Academic Press, p. 1315.
- Primakoff, P. and D.G. Myles (2000) Trends in Genetics 16:83.
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