Recombinant Human TIMP-1 Protein, CF Summary
Details of Functionality |
Measured by its ability to inhibit human MMP-2 cleavage of a fluorogenic peptide substrate Mca-PLGL-Dpa-AR-NH 2 (Catalog # ES001). The IC 50 value is approximately 2.5 nM as measured under the described conditions. |
Source |
Mouse myeloma cell line, NS0-derived human TIMP-1 protein Cys24-Ala207 |
Accession # |
|
N-terminal Sequence |
Cys24 |
Protein/Peptide Type |
Recombinant Enzymes |
Gene |
TIMP1 |
Purity |
>95%, 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 |
21 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 |
28-30 kDa, reducing conditions |
Publications |
Read Publications using 970-TM 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 °C as supplied.
- 3 months, -20 to -70 °C under sterile conditions after reconstitution.
|
Buffer |
Lyophilized from a 0.2 μm filtered solution in Sodium Acetate and NaCl. |
Purity |
>95%, by SDS-PAGE under reducing conditions and visualized by silver stain |
Reconstitution Instructions |
Reconstitute at 100 μg/mL in sterile, deionized water. |
Assay Procedure |
- Assay Buffer: 50 mM Tris, 10 mM CaCl2, 150 mM NaCl, 0.05% Brij-35 (w/v), pH 7.5 (TCNB)
- Recombinant Human TIMP-1 (rhTIMP-1) (Catalog # 970-TM)
- Recombinant Human MMP‑2 (rhMMP‑2) (Catalog # 902-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-2 at 100 µg/mL with 1 mM of APMA at final concentration respectively, in Assay Buffer.
- Incubate activation of rhMMP-2 at 37°C for 1 hour.
- Prepare a curve of rhTIMP-1 (MW: 20,695 Da). Make the following serial dilutions in Assay Buffer: 2000 nM, 1,000 nM, 500 nM, 300 nM, 200 nM, 150 nM, 100 nM, 20 nM, and 2 nM.
- Dilute activated 100 µg/mL rhMMP-2 to 12.8 µg/mL in Assay Buffer.
- Mix 25 µL of 12.8 µg/mL rhMMP-2, 16 µL of rhTIMP-1 serial curve dilutions, and 119 µL of Assay Buffer in micro-tubes.
- Include two enzyme controls of 25 µL of 12.8 µg/mL rhMMP-2 and 135 mL Assay Buffer in micro-tubes.
- Incubate reaction mixtures at 37 °C for 2 hours.
- Dilute incubated reaction mixtures by a 5-fold dilution in Assay Buffer.
- Dilute Substrate to 10 µM in Assay Buffer.
- In a plate load 50 µL of 5-fold diluted incubated reaction mixtures to wells.
- Start the reaction by adding 50 µL of 10 µM Substrate to wells.
- Read at excitation and emission wavelengths of 320 nm and 405 nm (top read), respectively in kinetic mode for 5 minutes.
- Derive the IC50 value of rhTIMP-1 from the curve.
- Calculate specific activity for each point using the following formula (if needed):
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-2: 0.02 µg
- rhTIMP-1 curve: 20 nM, 10 nM, 5 nM, 3 nM, 2 nM, 1.5 nM, 1.0 nM, 0.2 nM, 0.02 nM, and 0 nM
- Substrate: 5 µM
|
Notes
This product is produced by and ships from R&D Systems, Inc., a Bio-Techne brand.
Alternate Names for Recombinant Human TIMP-1 Protein, CF
Background
Tissue inhibitors of metalloproteinases or TIMPs are a family of proteins that regulate the activation and proteolytic activity of the zinc enzymes known as matrix metalloproteinases (MMPs). There are four members of the family, TIMP-1, TIMP-2, TIMP-3 and TIMP-4. TIMP-1 is a glycoprotein with a molecular mass of 28 kDa produced by a wide range of cell types. TIMP-1 inhibits active MMP-mediated proteolysis by forming an N-terminal, non-covalent binary complex with the MMP active site. TIMP-1 also associates C-terminally with Pro-MMP-9 in a complex which may play a role in regulating activation. Independent of MMPs, TIMP-1 has been shown to have a role in tissue homeostasis.
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