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Information on EC 2.4.1.258 - dolichyl-P-Man:Man5GlcNAc2-PP-dolichol alpha-1,3-mannosyltransferase

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IUBMB Comments
The formation of N-glycosidic linkages of glycoproteins involves the ordered assembly of the common Glc3Man9GlcNAc2 core-oligosaccharide on the lipid carrier dolichyl diphosphate. Early mannosylation steps occur on the cytoplasmic side of the endoplasmic reticulum with GDP-Man as donor, the final reactions from Man5GlcNAc2-PP-dolichol to Man9Glc-NAc2-PP-dolichol on the lumenal side use dolichyl beta-D-mannosyl phosphate. The first step of this assembly pathway on the luminal side of the endoplasmic reticulum is catalysed by ALG3.
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The enzyme appears in viruses and cellular organisms
Synonyms
Alg3, Alg3p, AtALG3, Dol-P-Man:Man5GlcNAc2-PP-Dol alpha1,3-mannosyl transferase, Dol-P-Man:Man5GlcNAc2-PP-Dol mannosyltransferase, dolichyl-P-Man:Man(5)GlcNAc(2)-PP-dolichyl mannosyltransferase, Not56-like protein, PpAlg3 alpha-1,3-mannosyl transferase, TbALG3, more
REACTION
REACTION DIAGRAM
COMMENTARY hide
ORGANISM
UNIPROT
LITERATURE
dolichyl beta-D-mannosyl phosphate + alpha-D-Man-(1->2)-alpha-D-Man-(1->2)-alpha-D-Man-(1->3)-[alpha-D-Man-(1->6)]-beta-D-Man-(1->4)-beta-D-GlcNAc-(1->4)-alpha-D-GlcNAc-diphosphodolichol = alpha-D-Man-(1->2)-alpha-D-Man-(1->2)-alpha-D-Man-(1->3)-[alpha-D-Man-(1->3)-alpha-D-Man-(1->6)]-beta-D-Man-(1->4)-beta-D-GlcNAc-(1->4)-alpha-D-GlcNAc-diphosphodolichol + dolichyl phosphate
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