Recombinant B. thetaiotaomicron Heparinase I Protein, CF

Catalog #: 5830-GH
1 Citation Datasheet / COA / SDS

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5830-GH-010

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Recombinant B. thetaiotaomicron Heparinase I Protein, CF Summary

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Product Specifications

Purity

>90%, 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.

Activity

Measured by its ability to liberate oligosaccharides from heparin. The specific activity is >12,000 pmol/min/μg, as measured under the described conditions.

Source

E. coli-derived b. thetaiotaomicron Heparinase I protein
Met1-Arg376, with Met, 6-His tag and a fusion partner at the N-terminus

Accession #

NP_813586

N-terminal Sequence
Analysis

Met

Predicted Molecular Mass

55 kDa

SDS-PAGE

59 kDa, reducing conditions

Product Datasheets

5830-GH

Product Datasheet

COA

SDS

Carrier Free

What does CF mean?

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.

What formulation is right for me?

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.

5830-GH

Formulation	Supplied as a 0.2 μm filtered solution in Tris, NaCl and Citrate.
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. 6 months from date of receipt, -70 °C as supplied. 3 months, -70 °C under sterile conditions after opening.

Assay Procedure

Materials

Assay Buffer: 50 mM Tris, 300 mM NaCl, 2 mM CaCl₂, pH 7.5
Recombinant B. thetaiotaomicron Heparinase I (rBtHeparinase I) (Catalog # 5830-GH)
Substrate: Heparin (Tocris, Catalog # 2812), prepare a stock solution in deionized water
96 well clear UV-transparent microplate (Corning, Catalog # 3635)
Plate Reader (Model: SpectraMax Plus by Molecular Devices) or equivalent

Dilute rBtHeparinase I to 1 ng/µL in Assay Buffer.
Dilute Substrate to 0.75 mg/mL in Assay Buffer.
Load into plate 100 µL of 1 ng/µL rBtHeparinase I, and start the reaction by adding 200 µL of 0.75 mg/mL Substrate. Include a Substrate Blank containing 100 µL of Assay Buffer and 200 µL of 0.75 mg/mL Substrate.
Read in kinetic mode for 5 minutes at an absorbance of 232 nm.
Calculate specific activity:

Specific Activity (pmoles/min/µg) =	Adjusted V_max* (OD/min) x well volume (L) x 10¹² pmol/M
	ext. coeff (M^-1cm^-1) x path corr.* (cm) x amount of enzyme (µg)

     *Adjusted for Substrate Blank
     **Using the extinction coefficient 3800 M^-1cm^-1
     ***Using the path correction 0.92 cm
     Note: the output of many spectrophotometers is in mOD Per Well:

rBtHeparinase I: 0.1 µg
Substrate: 0.5 mg/mL

Reconstitution Calculator

Background: Heparinase I

Heparin and heparan sulfate are sulfated glycosaminoglycans that share basic carbohydrate backbone structure with alternating uronic acid and N-acetylglucosamine residues (1, 2). Heparin is found in mast cells and has strong anticoagulation properties. Heparan sulfate is found on cell membrane and extracellular matrix and is involved in various biological events from cell growth, adhesion and migration to lipid metabolism. Heparin has a much higher degree of sulfation than heparan sulfate, which can be considered as a polysaccharide with regions similar to heparin interspaced with much less sulfated regions. Both heparin and heparan sulfate can be digested by heparinases, a group of bacterial lyases that are widely used as tools for processing and analyze these polysaccharides. Heparinase I from Bacteroides thetaiotaomicron (3) is a newly discovered heparinase with no activity against chondroitin sulfate and keratan sulfate (4). The enzyme readily releases tri‑sulfated and di-sulfated disaccharides from heparin and heparan sulfate.

References

MacArthur, J. M. et al. (2007) J. Clin. Invest. 117:153.
Esko, J. D. and Selleck, S. B. (2002) Annu. Rev. Biochem. 71:435.
Xu, J. et al. (2003) Science 299:2074.
Luo, Y. et al. (2007) Arch. Biochem. Biophys. 460:17.

Entrez Gene IDs

1073402 (B. thetaiotaomicron)

Alternate Names

Heparinase I

Related Research Areas

Citation for Recombinant B. thetaiotaomicron Heparinase I 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.

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