beta13glucosyl

Beta13glucosyl is a term used in carbohydrate chemistry to describe a glucosyl moiety that is linked to an acceptor via a beta-glycosidic bond between the anomeric carbon (C1) of glucose and the hydroxyl group on the third carbon of the acceptor, forming a beta-1,3-glucosidic linkage. In systematic shorthand, this fragment is referred to as beta-1,3-glucosyl. The designation emphasizes that the glucose residue adopts the beta configuration at C1 and that the linkage point is the 1-to-3 position relative to the acceptor.

Chemical and structural context: The glucosyl unit is typically derived from D-glucose in its pyranose form. The beta configuration means the substituent at C1 is equatorial in the common chair conformation. Beta-1,3 linkages occur in various oligosaccharides and polysaccharides, and the presence of a beta-1,3-glucosyl linkage can influence the overall conformation, solubility, and hydrogen-bonding pattern of the molecule.

Biological and practical relevance: Beta-1,3-glucosyl linkages are found in natural products such as certain polysaccharides and glycosides, and they are studied in glycobiology and enzymology. Enzymes that recognize or hydrolyze such bonds include beta-1,3-glucosidases and related glycosyltransferases, which help define substrate specificity and mechanistic pathways.

Applications: The beta-1,3-glucosyl motif is used in the design of glycoconjugates, glycosylation studies, and as a descriptive fragment in databases and literature to specify a glucose unit linked at the 3-position of an acceptor.