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Dolichyl-P-Glc:Glc2Man9GlcNAc2-PP-dolichol alpha-1,2-glucosyltransferase (EC 2.4.1.256, ALG10, Dol-P-Glc:Glc2Man9GlcNAc2-PP-Dol alpha-1,2-glucosyltransferase) is an enzyme with systematic name dolichyl beta-D-glucosyl phosphate:D-Glc-alpha-(1->3)-D-Glc-alpha-(1->3)-D-Man-alpha-(1->2)-D-Man-alpha-(1->2)-D-Man-alpha-(1->3)-(D-Man-alpha-(1->2)-D-Man-alpha-(1->3)-(D-Man-alpha-(1->2)-D-Man-alpha-(1->6))-D-Man-alpha-(1->6))-D-Man-beta-(1->4)-D-GlcNAc-beta-(1->4)-D-GlcNAc-diphosphodolichol 2-alpha-D-glucosyltransferase.

This enzyme catalyses the following chemical reaction:

which is:

dolichyl beta-D-glucosyl phosphate + D-Glc-alpha-(1->3)-D-Glc-alpha-(1->3)-D-Man-alpha-(1->2)-D-Man-alpha-(1->2)-D-Man-alpha-(1->3)--D-Man-alpha-(1->6)]-D-Man-beta-(1->4)-D-GlcNAc-beta-(1->4)-D-GlcNAc-diphosphodolichol ${\displaystyle \rightleftharpoons }$ D-Glc-alpha-(1->2)-D-Glc-alpha-(1->3)-D-Glc-alpha-(1->3)-D-Man-alpha-(1->2)-D-Man-alpha-(1->2)-D-Man-alpha-(1->3)--D-Man-alpha-(1->6)]-D-Man-beta-(1->4)-D-GlcNAc-beta-(1->4)-D-GlcNAc-diphosphodolichol + dolichyl phosphate

This eukaryotic enzyme performs the final step in the synthesis of the lipid-linked oligosaccharide.

Human proteins associated with this domain

• ALG10
• ALG10B

References

1. Burda P, Aebi M (May 1998). "The ALG10 locus of Saccharomyces cerevisiae encodes the alpha-1,2 glucosyltransferase of the endoplasmic reticulum: the terminal glucose of the lipid-linked oligosaccharide is required for efficient N-linked glycosylation". Glycobiology. 8 (5): 455–62. doi:10.1093/glycob/8.5.455. hdl:20.500.11850/422717. PMID 9597543.

External links

• Dolichyl-P-Glc:Glc2Man9GlcNAc2-PP-dolichol+alpha-1,2-glucosyltransferase at the U.S. National Library of Medicine Medical Subject Headings (MeSH)

• Biology

• EC 2.4.1