Characterization of endo-β-N-acetylglucosaminidase from alkaliphilic Bacillus halodurans C-125

Kiyotaka Fujita, Hideto Takami, Kenji Yamamoto, Kaoru Takegawa

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23 Citations (Scopus)


The genome sequencing project on alkaliphilic Bacillus halodurans C-125 revealed a putative endo-β-N-acetylglucosaminidase (Endo-BH), which consists of a signal peptide of 24 amino acids, a catalytic region of 634 amino acids exhibiting 50.1% identity with the endo-β-N-acetylglucosaminidase from Arthrobacter protophormiae (Endo-A), and a C-terminal tail of 220 amino acids. Transformed Escherichia coli cells carrying the Endo-BH gene exhibited endo-β-N-acetylglucosaminidase activity. Recombinant Endo-BH hydrolyzed high-mannose type oligosaccharides and hybrid type oligosaccharides, and showed transglycosylation activity. On deletion of 219 C-terminal amino acid residues of Endo-BH, the wild type level of activity was retained, whereas with deletions of the Endo-A homolog domain, the proteins were expressed as inclusion bodies and these activities were reduced. These results suggest that the enzymatic properties of Endo-BH are similar to those of Endo-A, and that the C-terminal tail does not affect the enzyme activity. Although the C-terminal tail region is not essential for enzyme activity, the sequence is also conserved among endo-β-N-acetylglucosaminidases of various origins.

Original languageEnglish
Pages (from-to)1059-1066
Number of pages8
JournalBioscience, Biotechnology and Biochemistry
Issue number5
Publication statusPublished - May 2004
Externally publishedYes

All Science Journal Classification (ASJC) codes

  • Biotechnology
  • Analytical Chemistry
  • Biochemistry
  • Applied Microbiology and Biotechnology
  • Molecular Biology
  • Organic Chemistry


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