Endo F2, Endoglycosidase F2, endo-beta-N-acetylglucosaminidase F2
Endo F2 cleaves N-linked (asparagine-linked) biantennary oligosaccharides from glycoproteins. It also will cleave high mannose glycans but at a 40x reduced rate. It cleaves between the two N-acetylglucosamine residues in the diacetylchitobiose core of the oligosaccharide, generating a truncated sugar molecule with one N-acetylglucosamine residue remaining on the asparagine. In contrast, PNGase F removes the oligosaccharide intact.
Endoglycosidase F2 is less sensitive to protein conformation than PNGase F and is therefore more suitable for deglycosylation of native proteins. However, for optimal results, denaturation of the glycoprotein is recommended.
Additional Endo F Products
Endoglycosidase F1 releases bianatennary and some hybrid glycans
Endoglycosidase F3 will release triantennarry and fucosylated biantennary N-glycans
The Endo F Multi-Kit includes 20 µLs of each of the Endo F enzymes and their buffers.
Source recombinant Elizabethkingia miricola (was Chryseobacterium meningosepticum) in E. Coli
Cleaves all asparagine-linked biantennary oligosaccharides and high mannose (though at a 40X reduced rate) N-glycans from peptides and proteins
60 µl aliquot of enzyme (0.3 U) in 10 mM sodium acetate 25mM NaCl, pH 4.5
Included with 20 µL and 60 µL pack sizes:
5x Reaction Buffer – 250 mM sodium acetate, pH 4.5
Specific Activity >20 U/mg
Activity >5 U/ml
Molecular weight 32,000 daltons
1. Add up to 200 µg of glycoprotein to an Eppendorf tube. Adjust to 38 µl final volume with de-ionized water.
2. Add 10 µl 5x Reaction Buffer 4.5
3. Add 2.0 µl of Endo F2. Incubate 1 hour at 37˚C.
Defined as the amount of enzyme required to catalyze the release of N-linked oligosaccharides from 1 micromole of denatured porcine fibrinogen in 1 minute at 37˚C, pH 5.5. Cleavage is monitored by SDS-PAGE (cleaved finbrinogen migrates faster).
Storage Store enzyme at 4˚C.
Stability Stable at least 12 months when stored properly. Several days exposure to ambient tempertures will not reduce activity.
Purity Endoglycosidase F2 is tested for contaminating protease as follows; 10 μg of denatured BSA is incubated for 24 hours at 37oC with 2 μL of enzyme. SDS-PAGE analysis of the treated BSA shows no evidence of degradation.
The production host strain has been extensively tested and does not produce any detectable glycosidases.
Endo F1 References:
Maley P., R. B. Trimble, A. L. Tarentino and T. H. Plummer Jr. Characterization of glycoproteins and their associated oligosaccharides through the use of endoglycosidases. Anal Biochem 180:195-204 (1989).
Plummer, T. H. Jr, A. W. Phelan and A. L. Tarentino. Porcine fibrinogen glycopeptides: substrates for detecting endo-N-acetylglucosaminidases F2 and F3. Anal Biochem 235:98-101 (1996).
Reddy A., B. G. Grimwood, T. H. Plummer Jr and A. L. Tarentino. High- level expression of the Endo-beta-N- acetylglucosaminidase F2 gene in E.coli: one step purification to homogeneity. Glycobiology 8:633-636 (1998).
Tarentino, A. L., C. M. Gomez and T. H. Plummer Jr. Deglycosylation of Asparagine-Linked Glycans by Peptide:N-Glycosidase F. Biochemistry 24:4665-4671 (1985).
Tarentino A. L., G. Quinones, W. P. Schrader, L. M. Changchien and T. H. Plummer Jr. Multiple endoglycosidase (Endo) F activities expressed by Flavobacterium meningosepticum. Endo F1: molecular cloning, primary sequence, and structural relationship to Endo H. J Biol Chem 267:3868-3872 (1992).
Tarentino A. L., G. Quinones, L. M. Changchien, and T. H. Plummer Jr. Multiple endoglycosidase F activities expressed by Flavobacterium meningosepticum endoglycosidases F2 and F3: Molecular cloning, primary sequence, and enzyme expression. J Biol Chem 268(13):9702-9708 (1993).
Tarentino A. L. and T. H. Plummer Jr. Substrate specificity of Flavobacterium meningosepticum: Endo F2 and endo F3: purity is the name of the game. Glycobiology 4:771-773 (1994).
Tarentino, A. L. and T. H. Plummer Jr. Enzymatic deglycosylation of asparagine- linked glycans: purification, properties and specificity of oligosaccharide- cleaving enzymes from Flavobacterium meningosepticum. Methods in Enzymology 230:44-57 (1994).
Tarentino A. L., G. Quinones and T. H. Plummer Jr. Overexpression and purification of non-glycosylated recombinant endo-beta-N- acetylglucosaminidase F3. Glycobiology 5:599-601 (1995).
Trimble, R. B. and A. L. Tarentino. Identification of Distinct Endoglycosidase (Endo) Activities in Flavobacterium meningosepticum: Endo F1, Endo F2 and Endo F3. J. Biol Chem 266:1646-1651 (1991).