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Recombinant F. meningosepticum PNGase F Protein, CF

Catalog #: 7695-GH Datasheet / COA / SDS
Newer Version Available: 9109-GH
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Discontinued Product

7695-GH has been discontinued and is replaced by 9109-GH.

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Recombinant F. meningosepticum PNGase F Protein, CF Summary

Product Specifications

Purity
>90%, by SDS-PAGE under reducing conditions and visualized by Colloidal Coomassie® Blue stain at 5 μg per lane
Endotoxin Level
<1.0 EU per 1 μg of the protein by the LAL method.
Activity
Measured by its ability to deglycosylate ribonuclease B under denatured conditions. >50% ribonuclease B (10 μg) is deglycosylated by 10 ng of rFmPNGase F within 30 minutes, as measured under the described conditions.
Source
E. coli-derived f. meningosepticum PNGase F protein
Ala41-Asn354 with N-terminal Met and 6-His tag
Accession #
AAA85323
N-terminal Sequence
Analysis
Met
Predicted Molecular Mass
36 kDa
SDS-PAGE
33-35 kDa, reducing conditions

Product Datasheets

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7695-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.

7695-GH

Formulation Supplied as a 0.2 μm filtered solution in Tris and NaCl.
Shipping The product is shipped with polar packs. 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, -20 to -70 °C as supplied.
  • 3 months, -20 to -70 °C under sterile conditions after opening.

Assay Procedure

Materials
  • Assay Buffer: 0.1 M Tris, pH 7.5
  • Denaturing Buffer (10X): 5% SDS, 0.8 M beta -Mercaptoethanol
  • Recombinant F. meningosepticum PNGase F (rFmPNGaseF) (Catalog # 7695-GH)
  • Ribonuclease B, from bovine pancreas (RNase B) (Sigma, Catalog # R7884), 2.5 mg/mL stock in 25 mM Tris, pH 7.5
  • 10% (v/v) Triton® X-100 in deionized water
  • Reducing SDS-PAGE Sample Buffer
  • SDS-PAGE or Western Blot
  1. Dilute Denaturing Buffer to 5X in deionized water.
  2. Create a Substrate Mixture containing 0.8 mg/mL RNAse B and 1X denaturing buffer in deionized water.
  3. Heat Substrate Mixture at 100 °C for 10 minutes. Cool to room temperature and microcentrifuge briefly.
  4. Add Triton X-100 to a final concentration of 1.67%.
  5. Dilute rFmPNGaseF to 0.67 ng/µL in Assay buffer.
  6. Combine 15 µL of Substrate Mixture and 15 µL of 0.67 ng/µL rFmPNGaseF. Include a control containing 15 µL of Substrate Mixture and 15 µL of Assay buffer.
  7. Incubate at 37 °C for 30 minutes.
  8. Combine equal volumes of incubated reaction mixture and reducing SDS-PAGE sample buffer and boil samples at 100 °C for 3‑5 minutes.
  9. Load 15 µL (2.5 µg RNase B) per lane on a 4-20% SDS-PAGE gel.
  10. Stain gel and analyze for percent deglycosylation using densitometry.
Per Reaction:
  • rFmPNGaseF: 10 ng
  • RNase B: 10 µg
Reconstitution Calculator

Reconstitution Calculator

The reconstitution calculator allows you to quickly calculate the volume of a reagent to reconstitute your vial. Simply enter the mass of reagent and the target concentration and the calculator will determine the rest.

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Background: PNGase F

PNGase F, peptide N-glycosidase F from Flavobacterium meningosepticum, catalyzes the hydrolysis of asparagine-linked high mannose, as well as hybrid and complex oligosaccharides from glycoproteins (1). Unlike glycosidases that hydrolyze glycosidic bonds, PNGase F is an amidase that cleaves the beta ‑aspartylglucosamine bond between the innermost GlcNAc of N-glycans and asparagine residues of glycoproteins (2). The enzyme is highly active on various N‑glycans except those with the innermost GlcNAc modified with alpha 1-3-linked core fucose, which is commonly found on plant glycoproteins (3). Cleavage with PNGase F will convert the asparagine residue to an aspartic residue, allowing identification of the glycosylation site by mass spectrometry (4). This purified enzyme is compatible with glycan analysis using mass spectrometry.

References
  1. Elder, J.H. and Alexander, S. (1982) Proc. Natl. Acad. Sci. USA 79:4540.
  2. Maley, F. et al. (1989) Anal. Biochem. 180:195.
  3. Tarentino, A.L. and Plummer, T.H. (1994) Methods Enzymol 230:44.
  4. Zhang, H. et al. (2003) Nat. Biotechnol. 21:660.
Long Name
Peptide-N4-(N-acetyl-beta-D-glucosaminyl)asparagine Amidase F
Alternate Names
PNGase F; PNGF

Product Specific Notices

Coomassie is a registered trademark of Imperial Chemical Industries Ltd. Triton is a registered trademark of Union Carbide Corp.

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