Canadian Medical Guide > Chemicals and Drugs > Enzymes and Coenzymes > Enzymes > Transferases > Glycosyltransferases Terms and Definitions

Glycosyltransferases

Medical Definition:	Enzymes that catalyze the transfer of glycosyl groups to an acceptor. Most often another carbohydrate molecule acts as an acceptor, but inorganic phosphate can also act as an acceptor, such as in the case of PHOSPHORYLASES. Some of the enzymes in this group also catalyze hydrolysis, which can be regarded as transfer of a glycosyl group from the donor to water. Subclasses include the HEXOSYLTRANSFERASES; PENTOSYLTRANSFERASES; SIALYLTRANSFERASES; and those transferring other glycosyl groups. EC 2.4.
CAS Number:	EC 2.4
Previously Indexed:	Transferases (1966-1991)

Glycosyltransferases Categories.

	Hexosyltransferases - Enzymes that catalyze the transfer of hexose groups. EC 2.4.1.-.
	N-Acetylhexosaminyltransferases - Enzymes that catalyze the transfer of N-acetylhexosaminyl groups to an acceptor molecule which is frequently another carbohydrate. EC 2.4.1.
	Pentosyltransferases - Enzymes of the transferase class that catalyze the transfer of a pentose group from one compound to another. (Dorland, 28th ed) EC 2.4.2.
	Sialyltransferases - A group of enzymes with the general formula CMP-N-acetylneuraminate:acceptor N-acetylneuraminyl transferase. They catalyze the transfer of N-acetylneuraminic acid from CMP-N-acetylneuraminic acid to an acceptor, which is usually the terminal sugar residue of an oligosaccharide, a glycoprotein, or a glycolipid. EC 2.4.99.-.

Glycosyltransferases Medical Definitions and Terms

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