Measured by its ability to cleave the fluorogenic peptide substrate, Mca-PLGL-Dpa-AR-NH2 (Catalog # ES001). The specific activity is >250 pmol/min/µg, as measured under the described conditions.
Source
Mouse myeloma cell line, NS0-derived human MMP-8 protein Phe21-Gly467
>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
Enzyme Activity
Theoretical MW
51 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
70 kDa, reducing conditions
Publications
Read Publications using 908-MP in the following applications:
Use a manual defrost freezer and avoid repeated freeze-thaw cycles.
6 months from date of receipt, -70 °C as supplied.
3 months, -70 °C under sterile conditions after opening.
Buffer
Supplied as a 0.2 μm filtered solution in Tris, NaCl and CaCl2.
Purity
>90%, by SDS-PAGE under reducing conditions and visualized by silver stain
Assay Procedure
Assay Buffer: 50 mM Tris, 10 mM CaCl2, 150 mM NaCl, 0.05% (w/v) Brij-35, pH 7.5 (TCNB)
Recombinant Human MMP‑8 (rhMMP-8) (Catalog # 908-MP)
p-aminophenylmercuric acetate (APMA) (Sigma, Catalog # A-9563), 100 mM stock in DMSO
Substrate: MCA-Pro-Leu-Gly-Leu-DPA-Ala-Arg-NH2 (Catalog # ES001), 2 mM stock in DMSO
F16 Black Maxisorp Plate (Nunc, Catalog # 475515)
Fluorescent Plate Reader (Model: SpectraMax Gemini EM by Molecular Devices) or equivalent
Activate rhMMP-8 at 100 µg/mL with 1 mM APMA in Assay Buffer.
Incubate reaction at 37 °C for 1 hour.
Dilute activated rhMMP-8 to 1.0 ng/µL in Assay Buffer.
Dilute Substrate to 20 µM in Assay Buffer.
In a plate load 50 µL of 1.0 ng/µL rhMMP-8, and start the reaction by adding 50 µL of 20 µM Substrate to wells. Include a Substrate Blank containing 50 µL Assay Buffer and 50 µL of 20 µM Substrate.
Read at excitation and emission wavelengths of 320 nm and 405 nm, 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:
rhMMP-8: 0.050 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 MMP-8 Protein, CF
Matrix metalloproteinases (MMPs) are a family of zinc and calcium dependent endopeptidases with the combined ability to degrade all the components of the extracellular matrix. MMP-8 (neutrophil collagenase) is expressed in neutrophils, where it is stored in specific granules. MMP-8 release from the neutrophils is stimulated by various factors such as interleukins 1 and 8, TNF-alpha and GM-CSF. MMP-8 is capable of cleaving types I, II and III triple-helical collagen, gelatin peptides, fibronectin, proteoglycans, aggrecan, serpins, beta -casein and peptides such as angiotensin and substance P. In addition to its function in phagocytosis, MMP‑8 has a high capacity for infiltrating connective tissue, and is implicated in the breakdown of the extracellular matrix in diseases such as rheumatoid arthritis. Structurally, MMP-8 consists of several domains: a pro-domain that is cleaved upon activation, a catalytic domain containing the zinc-binding site, a short hinge region and a hemopexin-like domain. MMP-8 is heavily glycosylated.
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