O-Glycosidase

Catalog # Concentration Size List Price Quantity Your Price
P0733L 40000000 units/ml 10000000 units $919.00
$827.10
P0733S 40000000 units/ml 2000000 units $232.00
$208.80
Catalog # Size List Price Your Price
P0733L 10000000 units $919.00
$827.10
P0733S 2000000 units $232.00
$208.80
Catalog #
Qty:
 
*On-line ordering is for Canadian customers only. Web pricing is applicable only to orders placed online at www.neb.ca

O-Glycosidase, also known as Endo-α-N-Acetylgalactosaminidase, catalyzes the removal of Core 1 and Core 3 O-linked disaccharides from glycoproteins.

  • Can be used in conjunction with other exoglycosidases to remove more complex O-glycans
  • Recombinant enzyme with no detectable exoglycosidase or other endoglycosidase contaminating activities
  • Glycerol -free for optimal performance in HPLC and mass spectrometry analysis
  • ≥95% purity, as determined by SDS-PAGE and intact ESI-MS
  • Optimal activity and stability for up to 24 months
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O-Glycosidase, also known as Endo-α-N-Acetylgalactosaminidase, catalyzes the removal of Core 1 and Core 3 O-linked disaccharides from glycoproteins.

Substrate Specificity:

Substrate Specificity:
Product Source
Cloned from Enterococcus faecalis and expressed in E. coli (1).
Reagents Supplied

The following reagents are supplied with this product:

NEB # Component Name Component # Stored at (°C) Amount Concentration
  O-Glycosidase P0733SVIAL -20 1 x 0.05 ml 4.0E7 units/ml
  GlycoBuffer 2 B3704SVIAL -20 1 x 1 ml 10 X
  Glycoprotein Denaturing Buffer B1704SVIAL -20 1 x 1 ml 10 X
  NP-40 B2704SVIAL -20 1 x 1 ml 10 %
  O-Glycosidase P0733LVIAL -20 1 x 0.25 ml 4.0E7 units/ml
  GlycoBuffer 2 B3704SVIAL -20 1 x 1 ml 10 X
  Glycoprotein Denaturing Buffer B1704SVIAL -20 1 x 1 ml 10 X
  NP-40 B2704SVIAL -20 1 x 1 ml 10 %
Application Features
  • Removal of Core 1 and Core 3 O-linked disaccharide glycans from glycoproteins

Properties & Usage

Unit Definition

One unit is defined as the amount of enzyme required to remove 0.68 nmol of O-linked disaccharide from 5 mg of neuraminidase digested, non-denatured fetuin (2) in 1 hour at 37°C in a total reaction volume of 100 µl (1 unit of both O-Glycosidase and PNGase F will remove equivalent molar amounts of O-linked disaccharides and N-linked oligosaccharides, respectively).

1X Glycoprotein Denaturing Buffer
0.5% SDS
40 mM DTT

1X NP-40
1% NP-40 in MilliQ-H2O

Reaction Conditions

1X GlycoBuffer 2
Incubate at 37°C

1X GlycoBuffer 2
50 mM Sodium Phosphate
(pH 7.5 @ 25°C)

Storage Buffer

20 mM Tris-HCl
50 mM NaCl
1 mM EDTA
pH 7.5 @ 25°C

Heat Inactivation

65°C for 10 minutes

Molecular Weight

Apparent: 147000 daltons

Unit Assay Conditions

Two fold serial dilutions of O-Glycosidase are added to a reaction mixture of 5 mg of neuraminidase digested fetuin with 1X GlycoBuffer 2. The reaction mix is then incubated at 37°C for 1 hour. O-linked disaccharide carbohydrates are determined by the Morgan and Elson Assay (1).

Notes
  • Since O-Glycosidase is inhibited by SDS, it is essential to have NP-40 in the reaction mixture. It is not known why this non-ionic detergent counteracts the SDS inhibition at the present time. Double digest with Endo H must have NP-40 present (NP-40 does not inhibit Endo H).
  • To deglycosylate a native glycoprotein, longer incubation time as well as more enzyme may be required.
  • It is necessary to treat glycoproteins concomitantly with Neuraminidase and O-Glycosidase. Neuraminic Acid residues must be removed in order to allow O-Glycosidase to cleave the O-linked disaccharides. A general Neuraminidase (#P0720) or the O-Glycosidase and Neuraminidase bundle (#E0540S)  is recommended.
  • Under denaturing conditions the enzyme activity is increased two-fold. This observation is substrate dependent.
References
  • Morgan, W.T.J. and Elson, L.A. (1994). Biochem. J.. 28, 988-995.
Tech Tips
  • Don’t forget to include Neuraminidase (P0720) in your reaction! It is necessary to treat glycoproteins concomitantly with Neuraminidase and O-Glycosidase. Neuraminic Acid residues must be removed in order to allow O-Glycosidase to cleave the O-linked disaccharides.

    NEB’s O-Glycosidase is the only available O-Glycosidase that catalyzes the removal of Core 1 and Core 3 O-linked disaccharides from glycoproteins

    You can use this enzyme under native or denaturing conditions

    Under native conditions we recommend adding more enzyme and using longer incubation times

    Under denaturing conditions the enzyme activity is increased two-fold. However, this observation may be substrate dependent.

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]
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