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Factor Xa Protease

Catalog # Concentration Size List Price Quantity Your Price
P8010L 1 mg/ml 250 µg $512.00
$460.80
P8010S 1 mg/ml 50 µg $128.00
$115.20
Catalog # Size List Price Your Price
P8010L 250 µg $512.00
$460.80
P8010S 50 µg $128.00
$115.20
Catalog #
Qty:
 
*On-line ordering is for Canadian customers only. Web pricing is applicable only to orders placed online at www.neb.ca

Factor Xa cleaves after the arginine residue in its preferred cleavage site Ile-Glu/Asp-Gly-Arg. It will sometimes cleave at other basic residues, depending on the conformation of the protein substrate. The most common secondary site, among those that have been sequenced, is Gly-Arg.

Factor Xa cleaves after the arginine residue in its preferred cleavage site Ile-(Glu or Asp)-Gly-Arg. It will sometimes cleave at other basic residues, depending on the conformation of the protein substrate (1,2,3). The most common secondary site, among those that have been sequenced, is Gly-Arg. There seems to be a correlation between proteins that are unstable in E.coli and those that are cleaved by Factor Xa at secondary sites; this may indicate that these proteins are in a partially unfolded state (Walker, I., Riggs, P., unpublished observations). Factor Xa will not cleave a site followed by proline or arginine.
Product Source
Factor Xa Protease is purified from bovine plasma and activated by treatment with the activating enzyme from Russell's viper venom.
Reagents Supplied

The following reagents are supplied with this product:

NEB # Component Name Component # Stored at (°C) Amount Concentration
  Factor Xa Protease P8010SVIAL -20 1 x 0.05 ml 1 mg/ml
  Factor Xa Protease P8010LVIAL -20 1 x 0.25 ml 1 mg/ml

Properties & Usage

Unit Definition

1 μg of Factor Xa will cleave 50 μg of MBP fusion protein test substrate, MBP-ΔSal to 95% completion in a total reaction volume of 50 μl in 6 hours or less at 23°C in 20 mM Tris-HCl (pH 8.0 @ 25°C) with 100 mM NaCl and 2 mM CaCl2.

Usage Concentration

1 mg/ml

Removal

Factor Xa will bind specifically to benzamidine-agarose.

Molecular Weight

Theoretical: 43 kDa

Deactivation

Dansyl-glu-gly-arg-chloromethyl ketone (CALBIOCHEM, #251700) will irreversibly inactivate Factor Xa by covalent attachment at the active site. In a reaction containing 20 μg/ml Factor Xa, 2 μM dansyl-glu-gly-arg-chloromethyl ketone will inactivate >95% of the Factor Xa in 1 minute at room temperature.

Notes
  • The test substrate MBP-ΔSal is maltose-binding protein fused to a truncated form of paramyosin, with the amino acids Ile-Glu-Gly-Arg at the fusion joint. Greater than 95% of the fusion protein is cleaved in 6 hours or less.
References
  • Nagai, K. et al. (1985). Proc. Natl. Acad. Sci. USA. 82,
  • Quinlan, R.A. et al (1989). Cell Sci. 82, 7252-7255.
  • Eaton, D. et al (1986). Biochemistry. 25, 505-512.
Quality Control Assay
Quality Control tests are performed on each new lot of NEB product to meet the specifications designated for it. Specifications and individual lot data from the tests that are performed for this particular product can be found and downloaded on the Product Specification Sheet, Certificate of Analysis, data card or product manual. Further information regarding NEB product quality can be found here.
Specifications
The Specification sheet is a document that includes the storage temperature, shelf life and the specifications designated for the product. The following file naming structure is used to name these document files: [Product Number]_[Size]_[Version]
Certificate of Analysis
The Certificate of Analysis (COA) is a signed document that includes the storage temperature, expiration date and quality controls for an individual lot. The following file naming structure is used to name these document files: [Product Number]_[Size]_[Version]_[Lot Number]
Safety Data Sheets
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This product is intended for research purposes only. This product is not intended to be used for therapeutic or diagnostic purposes in humans or animals.

New England Biolabs (NEB) is committed to practicing ethical science – we believe it is our job as researchers to ask the important questions that when answered will help preserve our quality of life and the world that we live in. However, this research should always be done in safe and ethical manner. Learn more.

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