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Báo cáo khóa học: Heterogeneity of homologously expressed Hypocrea jecorina (Trichoderma reesei ) Cel7B catalytic module

Chia sẻ: Nguyen Thang | Ngày: | Loại File: PDF | Số trang:11

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The catalytic module ofHypocrea jecorina(previously Trichoderma reesei) Cel7B was homologously expressed by transformation of strain QM9414. Post-translational modi-fications in purified Cel7B preparations were analysed by enzymatic digestions, high performance chromatography, mass spectrometry and site-directed mutagenesis. Of the five potential sites found in the wild-type enzyme, only Asn56 and Asn182 were found to be N-glycosylated. GlcNAc2Man5was identified as the predominant N-glycan, although lesser amounts of GlcNAc2Man7 and glycans carrying a mannophosphodiester bond were also detected. Repartition of neutral and charged glycan structures over the two glycosylation sites mainly accounts for the observed microheterogeneity of the protein. ...

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Nội dung Text: Báo cáo khóa học: Heterogeneity of homologously expressed Hypocrea jecorina (Trichoderma reesei ) Cel7B catalytic module

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