Abstract
The peptide-N 4-(N-acetylglucosaminyl) asparagine amidase (PNGase Se) earlier described [Lhernould S., Karamanos Y., Bourgerie S., Strecker G., Julien R., Morvan H. (1992)Glycoconjugate J 9:191–97] was partially purified from culturedSilene alba cells using affinity chromatography. The enzyme is active between pH 3.0 and 6.5, and is stable in the presence of moderate concentrations of several other protein unfolding chemicals, but is readily inactivated by SDS. Although the enzyme cleaves the carbohydrate from a variety of animal and plant glycopeptides, it does not hydrolyse the carbohydrate from most of the corresponding unfolded glycoproteins in otherwise comparable conditions. The substrate specificity of this plant PNGase supports the hypothesis that this enzyme could be at the origin of the production of ‘unconjugated N-glycans’ in a suspension medium of culturedSilene alba cells.
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Abbreviations
- GlcNAc:
-
N-acetylglucosamine
- PNGase:
-
peptide-N 4-(N-acetylglucosaminyl) asparagine amidase
- BSA:
-
bovine serum albumin
- SDS-PAGE:
-
sodium dodecyl sulfate-polyacrylamide gel electrophoresis
- TLC:
-
thin layer chromatography
- HPAEC-PAD:
-
High pH anion exchange chromatography-pulsed amperometric detection
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Lhernould, S., Karamanos, Y., Lerouge, P. et al. Characterization of the peptide-N 4-(N-acetylglucosaminyl) asparagine amidase (PNGase Se) fromSilene alba cells. Glycoconjugate J 12, 94–98 (1995). https://doi.org/10.1007/BF00731874
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DOI: https://doi.org/10.1007/BF00731874