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. 1994 Oct;176(20):6170–6174. doi: 10.1128/jb.176.20.6170-6174.1994

Purification and characterization of an endo-N-acetyl-beta-D-glucosaminidase from the culture medium of Stigmatella aurantiaca DW4.

S Bourgerie 1, Y Karamanos 1, T Grard 1, R Julien 1
PMCID: PMC196955  PMID: 7928985

Abstract

A novel endo-N-acetyl-beta-D-glucosaminidase (ENGase), acting on the di-N-acetylchitobiosyl part of N-linked glycans, was characterized in the culture medium of Stigmatella aurantiaca DW4. Purified to homogeneity by ammonium sulfate precipitation, gel filtration, and chromatofocusing, this ENGase presents, upon sodium dodecyl sulfate-polyacrylamide gel electrophoresis, a molecular mass near 27 kDa. Optimal pH and pI were 4.0 and 6.8, respectively. The enzyme, named ENGase St, exhibits high activity on oligomannoside-type glycoasparagines and glycoproteins and could also hydrolyze hybrid- and complex-type glycoasparagines but does not acts as a murein hydrolase.

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Selected References

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