Biology:Glycoprotein 2-beta-D-xylosyltransferase
| glycoprotein 2-beta-D-xylosyltransferase | |||||||||
|---|---|---|---|---|---|---|---|---|---|
| Identifiers | |||||||||
| EC number | 2.4.2.38 | ||||||||
| CAS number | 141256-56-6 | ||||||||
| Databases | |||||||||
| IntEnz | IntEnz view | ||||||||
| BRENDA | BRENDA entry | ||||||||
| ExPASy | NiceZyme view | ||||||||
| KEGG | KEGG entry | ||||||||
| MetaCyc | metabolic pathway | ||||||||
| PRIAM | profile | ||||||||
| PDB structures | RCSB PDB PDBe PDBsum | ||||||||
| Gene Ontology | AmiGO / QuickGO | ||||||||
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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]\displaystyle{ \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
- "Purification and specificity of beta1,2-xylosyltransferase, an enzyme that contributes to the allergenicity of some plant proteins". J. Biol. Chem. 272 (50): 31340–7. 1997. doi:10.1074/jbc.272.50.31340. PMID 9395463.
- Steinkellner H; Mucha, J; Mach, L; Altmann, F; Wilson, IB; Glössl, J; Steinkellner, H (2000). "Molecular cloning and functional expression of beta1, 2-xylosyltransferase cDNA from Arabidopsis thaliana". FEBS Lett. 472 (1): 105–8. doi:10.1016/S0014-5793(00)01443-5. PMID 10781814.
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