ⓘ N-acetyllactosaminide alpha-2.3-sialyltransferase. In enzymology, a N-acetyllactosaminide alpha-2.3-sialyltransferase is an enzyme that catalyzes the chemical r ..

                                     

ⓘ N-acetyllactosaminide alpha-2.3-sialyltransferase

In enzymology, a N-acetyllactosaminide alpha-2.3-sialyltransferase is an enzyme that catalyzes the chemical reaction

CMP-N-acetylneuraminate + beta-D-galactosyl-1.4-N-acetyl-D-glucosaminyl-glycoprotein ⇌ {\displaystyle \rightleftharpoons } CMP + alpha-N-acetylneuraminyl-2.3-beta-D-galactosyl-1.4-N-acetyl-D- glucosaminyl-glycoprotein

Thus, the two substrates of this enzyme are CMP-N-acetylneuraminate and beta-D-galactosyl-1.4-N-acetyl-D-glucosaminyl-glycoprotein, whereas its 3 products are CMP, alpha-N-acetylneuraminyl-2.3-beta-D-galactosyl-1.4-N-acetyl-D-, and glucosaminyl-glycoprotein.

This enzyme belongs to the family of transferases, specifically those glycosyltransferases that do not transfer hexosyl or pentosyl groups. The systematic name of this enzyme class is CMP-N-acetylneuraminate:beta-D-galactosyl-1.4-N-acetyl-D-glucosaminy l-glycoprotein alpha-2.3-N-acetylneuraminyltransferase. Other names in common use include sialyltransferase, cytidine, monophosphoacetylneuraminate-beta-galactosyl1-, > 4acetylglucosaminide alpha2-> 3-sialyltransferase, alpha2-> 3 sialyltransferase, and SiaT. This enzyme participates in 4 metabolic pathways: keratan sulfate biosynthesis, glycosphingolipid biosynthesis - lactoseries, glycan structures - biosynthesis 1, and glycan structures - biosynthesis 2.

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