Glycosidic bond

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Biolink's picture
Glycosidic bond

Well i know that in the formation of a disaccharide two monosaccharides is formed by removal of water from two -OH groups, one from each monosaccharide. My professor has given five options as follows,
Achiral bond,
Ether bond
Ester bond
Double bond
Alcohol bond
I havent read about this type of bonding pattern, can anyone help me to learn the type of bonding formed between glycosidic linkage. Kindly help me learn

Ivan Delgado
Ivan Delgado's picture

Hi dollycaddu,
First of all the formation of a disaccharide occurs because of a condensation reaction between a carbon atom of one sugar with the hydroxyl group of another sugar. The bond that forms is between an oxygen atom and a carbon atom, also known as a glycosidic linkage not because it is a different kind of bond (it is a very common bond called a covalent bond) but because it is between two two carbohydrate molecules (or a carbohydrate and another type of molecule). 
As for the different options you have, you need to look at the definitions of each of these bonds and determine if they are related to the glycosidic bond. Here is a hint: the bonds you list are more basic bonds than the glucosidic bond; in other words, a glycosidic bond is a more specific example of one or more of these bonds. For example the ether bond by definition is nothing more than two hydrocarbons linked by a single bond to an oxygen. By that definition your glycosidic bond is an ether bond. Likewise there are no double bonds linking a disaccharide, so you can cross that out as a bond that could define a glycosidic linkage. Achiral and alcohol have better explanations :).

Biolink's picture
Thanks a lot Ivan you

Thanks a lot Ivan you explained the concept well as well for giving me clue to start my serach