Thermostability of doubly glycosylated recombinant lysozyme

Y. Hashimoto, O. Munemura, K. Masumoto, T. Ueda, T. Imoto

Research output: Contribution to journalArticlepeer-review

4 Citations (Scopus)

Abstract

We prepared a lysozyme mutant (Q41S/R61S) introducing Asn-type glycosylation signal sites by yeast expression system. On purification by cation exchange column at pH 7, three fractions were obtained. Peptide mapping and mass-spectrometry showed the fractions were the derivatives glycosylated at both Asn39 and Asn59, at only Asn39, and not glycosylated. It was revealed that the processing of Asn-linked oligosaccharide at Asn39 and Asn59 occurred independently in yeast cells. The denaturation temperatures of these derivatives by differential scanning calorimetry were 76.0, 68.8, and 67.5°C at pH 3, respectively. The stabilization of glycosylated lysozyme depends on the degree of glycosylation. We concluded that stabilized proteins can be constructed by glycosylation at proper sites. Thermodynamic stabilization by the artificial double glycosylations on a protein has not yet been reported.

Original languageEnglish
Pages (from-to)1102-1107
Number of pages6
JournalBiological and Pharmaceutical Bulletin
Volume24
Issue number10
DOIs
Publication statusPublished - Nov 21 2001

All Science Journal Classification (ASJC) codes

  • Pharmacology
  • Pharmaceutical Science

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