Spinesin, encoded by the TMPRSS5 gene, is a new member of type II transmembrane serine proteases (TTSPs) (1). Mouse Spinesin contains the following structural domains: a short N-terminal cytoplasmic tail, a transmembrane domain, a stem region and a serine protease domain (2). The domain structure of Spinesin is common to other TTSPs, many of which have additional domains. The stem region of Spinesin contains a scavenger receptor-like domain. There could be 4 types of transcripts due to alternative splicing (3). Type 4 predicts 10 extra amino acids at the N-terminus as compared to type 3. The ectodomain corresponding to type 3 (residues 61‑445) or type 4 (residues 71‑455) was expressed and purified as a single chain pro-enzyme. By SDS‑PAGE, the pro‑enzyme migrates as multiple forms, possibly due to differential glycosylation. The pro‑enzyme can be activated by trypsin treatment. The resulting enzyme is active and its activity is measured as described above. The activated enzyme is a disulfide bond‑linked dimer.
Recombinant Mouse Spinesin Protein, CF
R&D Systems | Catalog # 1928-SE
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Key Product Details
- R&D Systems NS0-derived Recombinant Mouse Spinesin Protein (1928-SE)
- Quality control testing to verify active proteins with lot specific assays by in-house scientists
- All R&D Systems proteins are covered with a 100% guarantee
Source
NS0
Accession Number
Structure / Form
Pro form
Applications
Enzyme Activity
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Product Specifications
Source
Mouse myeloma cell line, NS0-derived mouse Spinesin protein
Tyr61-Arg445, with an N-terminal 7-His tag
Accession # NP_109634
Tyr61-Arg445, with an N-terminal 7-His tag
Accession # NP_109634
Purity
>95%, by SDS-PAGE under reducing conditions and visualized by silver stain.
Endotoxin Level
<1.0 EU per 1 μg of the protein by the LAL method.
N-terminal Sequence Analysis
His
Predicted Molecular Mass
43 kDa
SDS-PAGE
55-61 kDa, reducing conditions
Activity
Measured by its ability to cleave the fluorogenic peptide substrate Boc-QAR-AMC (Catalog # ES014).
The specific activity is >1,000 pmol/min/µg, as measured under the described conditions.
The specific activity is >1,000 pmol/min/µg, as measured under the described conditions.
Formulation, Preparation, and Storage
1928-SE
| Formulation | Supplied as a 0.2 μm filtered solution in MES and NaCl. |
| 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.
|
Background: Spinesin
References
- Shibata, K. et al. (2000) Genome Res. 10:1757.
- Yamaguchi, Y. et al. (2002) J. Biol. Chem. 277:6806.
- Watanable, Y. et al. (2004) Biochem. Biophys. Res. Commun. 324:333.
Alternate Names
TMPRSS5
Gene Symbol
TMPRSS5
UniProt
Additional Spinesin Products
Product Documents for Recombinant Mouse Spinesin Protein, CF
Certificate of Analysis
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Note: Certificate of Analysis not available for kit components.
Product Specific Notices for Recombinant Mouse Spinesin Protein, CF
For research use only
Related Research Areas
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Protocols
View specific protocols for Recombinant Mouse Spinesin Protein, CF (1928-SE):
Materials
- Activation Buffer: 50 mM Tris, 10 mM CaCl2, pH 7.5
- Assay Buffer: 100 mM Tris, pH 8.5
- Recombinant Mouse Spinesin (rmSpinesin) (Catalog # 1928-SE)
- Trypsin (Sigma, Catalog # T-1426)
- Recombinant Human Serpin A1/ alpha 1‑Antitrypsin (rhSerpin A1) (Catalog # 1268-PI)
- Fluorogenic Peptide Substrate: BOC-Gln-Ala-Arg-AMC (Catalog # ES014)
- F16 Black Maxisorp Plate (Nunc, Catalog # 475515)
- Fluorescent Plate Reader (Model: SpectraMax Gemini EM by Molecular Devices) or equivalent
- Dilute rmSpinesin to 200 µg/mL in Activation Buffer.
- Dilute Trypsin to 0.4 µg/mL in Activation Buffer.
- Combine equal volumes of 200 µg/mL rmSpinesin and 0.4 µg/mL Trypsin. Include a Trypsin control containing Activation Buffer in place of rmSpinesin.
- Incubate at room temperature for 1 hour.
- Dilute rhSerpin A1 to 36 µg/mL in Assay Buffer.
- Dilute the reaction mixtures in half by adding rhSerpin A1 for final concentrations of 18 µg/mL rhSerpin A1, 50 µg/mL rmSpinesin, and 0.1 µg/mL Trypsin. Addition of rhSerpin A1 will stop the activity of Trypsin. Control from step 3 will verify that rhSerpin A1 is working properly.
- Dilute rmSpinesin to 2 ng/µL in Assay Buffer. Dilute Trypsin control equally.
- Dilute Substrate to 200 µM in Assay Buffer.
- Load 50 µL of the diluted samples into a black well plate, and start the reaction by adding 50 µL of 200 µM Substrate. Include a Substrate Blank containing 50 µL Assay Buffer and 50 µL of 200 µM Substrate.
- Read at excitation and emission wavelengths of 380 nm and 460 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 7-Amino, 4-Methyl Coumarin (AMC) (Sigma, Catalog # A-9891).
Per Well:
- rmSpinesin: 0.1 µg
- Substrate: 100 µM
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