کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
6489963 1416545 2018 7 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Structural modeling and mutagenesis of endo-β-N-acetylglucosaminidase from Ogataea minuta identifies the importance of Trp295 for hydrolytic activity
موضوعات مرتبط
مهندسی و علوم پایه مهندسی شیمی بیو مهندسی (مهندسی زیستی)
پیش نمایش صفحه اول مقاله
Structural modeling and mutagenesis of endo-β-N-acetylglucosaminidase from Ogataea minuta identifies the importance of Trp295 for hydrolytic activity
چکیده انگلیسی
Endo-β-N-acetylglucosaminidase from the methylotrophic yeast Ogataea minuta (Endo-Om) is a glycoside hydrolase family 85 enzyme that has dual catalytic activity in the hydrolysis and transglycosylation of complex N-glycans, in common with the enzymes from the eukaryotic species. In this study, we have conducted mutagenesis of Endo-Om at Trp295, to determine the effect on hydrolytic activity. Structural modeling predicted that Trp295 forms an important interaction with the α-1,3-linked mannose residue of the trimannosyl N-glycan core, rather than being directly involved in catalytic activity. Our results showed that an aromatic amino acid is required at position 295 for the hydrolytic activity of this enzyme. Notably, the tryptophan residue is highly conserved in eukaryotic endo-β-N-acetylglucosaminidases that show activity toward complex oligosaccharides. Accordingly, our results strongly suggested that Trp295 is involved in the recognition of oligosaccharide substrates by Endo-Om.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Bioscience and Bioengineering - Volume 125, Issue 2, February 2018, Pages 168-174
نویسندگان
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