Cglykosylering

C-glycosylation is a type of glycosylation where a carbohydrate molecule is attached to a carbon atom other than the anomeric carbon atom, which is usually where glycosidic bonds are formed. This process is distinct from ordinary glycosidic bond formation, in which the carbohydrate molecule is attached to the anomeric carbon atom through a glycosidic bond.

The anomeric carbon atom is the center of the ring in a monosaccharide, and the anomeric hydroxyl group is the functional group responsible for the glycosidic bond in disaccharides and polysaccharides. In C-glycosylation, the carbohydrate molecule is attached to a non-anomeric carbon atom, resulting in a more stable and resistant bond.

C-glycosylation has been identified in various natural products, including those present in plants, animals, and microorganisms. The process is catalyzed by specific enzymes that recognize the carbohydrate molecules and attach them to the acceptor molecules. While the mechanisms of C-glycosylation are not as well understood as those of regular glycosidic bond formation, research has shown that these enzymes have distinct substrate specificities and require specific conditions.

The biological functions of C-glycosylation are still being studied, but it is thought to play a role in the production of bioactive compounds, including those with antibiotic and antitumor properties. The process is also significant in metabolism, where it contributes to the regulation of carbohydrate metabolism. The study of C-glycosylation has implications for synthetic glycoscience and the development of new methods for carbohydrate modification.