Glycoprotein 2-beta-D-xylosyltransferase

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Overview

In enzymology, a glycoprotein 2-beta-D-xylosyltransferase (EC 2.4.2.38) is an enzyme that catalyzes the chemical reaction

UDP-D-xylose + N₄-{N-acetyl-beta-D-glucosaminyl-(1->2)-alpha-D-mannosyl-(1->3)-[N- acetyl-beta-D-glucosaminyl-(1->2)-alpha-D-mannosyl-(1->6)]-beta-D- mannosyl-(1->4)-N-acetyl-beta-D-glucosaminyl-(1->4)-N-acetyl-beta-D- glucosaminyl}asparagine <math>\rightleftharpoons</math> UDP + N₄-{N-acetyl-beta-D-glucosaminyl-(1->2)-alpha-D-mannosyl-(1->3)-[N- acetyl-beta-D-glucosaminyl-(1->2)-alpha-D-mannosyl-(1->6)]-[beta-D- xylosyl-(1->2)]-beta-D-mannosyl-(1->4)-N-acetyl-beta-D-glucosaminyl- (1->4)-N-acetyl-beta-D-glucosaminyl}asparagine

The 5 substrates of this enzyme are UDP-D-xylose, [[N4-{N-acetyl-beta-D-glucosaminyl-(1->2)-alpha-D-mannosyl-(1->3)-[N-]], [[acetyl-beta-D-glucosaminyl-(1->2)-alpha-D-mannosyl-(1->6)]-beta-D-]], [[mannosyl-(1->4)-N-acetyl-beta-D-glucosaminyl-(1->4)-N-acetyl-beta-D-]], and [[glucosaminyl}asparagine]], whereas its 5 products are UDP, [[N4-{N-acetyl-beta-D-glucosaminyl-(1->2)-alpha-D-mannosyl-(1->3)-[N-]], [[acetyl-beta-D-glucosaminyl-(1->2)-alpha-D-mannosyl-(1->6)]-[beta-D-]], [[xylosyl-(1->2)]-beta-D-mannosyl-(1->4)-N-acetyl-beta-D-glucosaminyl-]], and [[(1->4)-N-acetyl-beta-D-glucosaminyl}asparagine]].

This enzyme belongs to the family of glycosyltransferases, specifically the pentosyltransferases. The systematic name of this enzyme class is UDP-D-xylose:glycoprotein (D-xylose to the 3,6-disubstituted mannose of N4-{N-acetyl-beta-D-glucosaminyl-(1->2)-alpha-D-mannosyl-(1->3)-[N-a cetyl-beta-D-glucosaminyl-(1->2)-alpha-D-mannosyl-(1->6)]-beta-D-man nosyl-(1->4)-N-acetyl-beta-D-glucosaminyl-(1->4)-N-acetyl-beta-D-glu cosaminyl}asparagine) 2-beta-D-xylosyltransferase. Other names in common use include beta1,2-xylosyltransferase, UDP-D-xylose:glycoprotein (D-xylose to the 3,6-disubstituted mannose, of, 4-N-{N-acetyl-beta-D-glucosaminyl-(1->2)-alpha-D-mannosyl-(1->3)-[N-, acetyl-beta-D-glucosaminyl-(1->2)-alpha-D-mannosyl-(1->6)]-beta-D-, mannosyl-(1->4)-N-acetyl-beta-D-glucosaminyl-(1->4)-N-acetyl-beta-D-, and glucosaminyl}asparagine) 2-beta-D-xylosyltransferase. This enzyme participates in glycan structures - biosynthesis 1.

References

• Zeng Y, Bannon G, Thomas VH, Rice K, Drake R, Elbein A (1997). "Purification and specificity of beta1,2-xylosyltransferase, an enzyme that contributes to the allergenicity of some plant proteins". J. Biol. Chem. 272: 31340&ndash, 7. PMID 9395463.CS1 maint: Multiple names: authors list (link)
• Steinkellner H (2000). "Molecular cloning and functional expression of beta1, 2-xylosyltransferase cDNA from Arabidopsis thaliana". FEBS. Lett. 472: 105&ndash, 8. PMID 10781814.

External links

The CAS registry number for this enzyme class is Template:CAS registry.