N-Glycosylation in Chrysosporium lucknowense enzymesстатья

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Дата последнего поиска статьи во внешних источниках: 18 июля 2013 г.

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[1] Gusakov A. V., Antonov A. I., Ustinov B. B. N-glycosylation in chrysosporium lucknowense enzymes // Carbohydrate Research. — 2008. — Vol. 343, no. 1. — P. 48–55. Twenty-eight enzymes, encoded by different genes and secreted by different mutant strains of Chrysosporium lucknowense, were subjected to MALDI-TOF MS peptide fingerprinting followed by analysis of the MS data using the GlycoMod tool from the ExPASy proteomic site. Various N-linked glycan structures were discriminated in the C. lucknowense proteins as a result of the analysis. N-Glycosylated peptides with modifications matching the oligosaccharide compositions contained in the GlycoSuiteDB were found in 12 proteins. The most frequently encountered N-linked glycan, found in 9 peptides from 7 proteins, was (Man)3(GlcNAc)2, that is, the core pentasaccharide structure forming mammalian-type high-mannose and hybrid/complex glycans in glycoproteins from different organisms. Nine out of 12 enzymes represented variably N-glycosylated proteins carrying common (Hex)0–4(HexNAc)0–6 + (Man)3(GlcNAc)2 structures, most of them being hybrid/complex glycans. Various glycan structures were likely formed as a result of the enzymatic trimming of a ‘parent’ oligosaccharide with different glycosidases. The N-glycosylation patterns found in C. lucknowense proteins differ from those reported for the extensively studied enzymes from Aspergilli and Trichoderma species, where high-mannose glycans of variable structure have been detected. [ DOI ]

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