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4 results about "Glycosylation" patented technology

Glycosylation (see also chemical glycosylation) is the reaction in which a carbohydrate, i.e. a glycosyl donor, is attached to a hydroxyl or other functional group of another molecule (a glycosyl acceptor). In biology, glycosylation mainly refers in particular to the enzymatic process that attaches glycans to proteins, or other organic molecules. This enzymatic process produces one of the fundamental biopolymers found in cells (along with DNA, RNA, and proteins). Glycosylation is a form of co-translational and post-translational modification. Glycans serve a variety of structural and functional roles in membrane and secreted proteins. The majority of proteins synthesized in the rough endoplasmic reticulum undergo glycosylation. It is an enzyme-directed site-specific process, as opposed to the non-enzymatic chemical reaction of glycation. Glycosylation is also present in the cytoplasm and nucleus as the O-GlcNAc modification. Aglycosylation is a feature of engineered antibodies to bypass glycosylation. Five classes of glycans are produced...

Method for solid-phase enrichment and mass spectrographic analysis of glycosylated peptide fragment

ActiveCN105300783AImprove Analytical Mass Spectrometry SelectivityHigh reaction specificityPreparing sample for investigationMaterial analysis by electric/magnetic meansGlycopeptideMass spectrometric
The invention belongs to the field of protein analysis, and relates to a new method for enrichment of a glycosylated peptide through a magnetic nanometer material modified by aminoxy, in particular to a method for solid-phase enrichment and mass spectrographic analysis of a glycosylated peptide fragment. The method comprises the following steps: firstly, using sodium periodate NaIO4 to oxidize a hydroxyl group on a glycopeptide to change the hydroxyl group to an aldehyde group; secondly, placing the magnetic nanometer material Fe3O4@ONH2 modified by aminoxy to an oxidized glycopeptide solution, and fixing the glycopeptide to the magnetic nanometer material through reaction of an aminoxy group and the aldehyde group obtained after a sugar chain in the glycopeptides is oxidized; thirdly, cleaning to remove non-glycopeptide which does not react with the nanometer material; finally, dissociating the captured glycopeptide from the material by use of sugar chain enzyme, and realizing mass spectrographic analysis of the glycosylated peptide. The method is simple in step, convenient to operate, high in speed and efficient, and can realize highly-sensitive and highly-selective mass spectrometric analysis of the glycosylated peptide.
Owner:FUDAN UNIV
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