Source:http://www.reactome.org/biopax/48887BiochemicalReaction1981
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Authored: Dall'Olio, GM, 2009-11-10,
Edited: Jassal, B, 2009-11-10,
Reviewed: Gagneux, P, 2010-04-16,
The sixth mannose is added to the N-glycan precursor. This reaction occurs in the ER lumen and uses a different mannose donor (dolichyl phosphate D-mannose) than the previous steps. It has been proposed that ALG3, along with all the mannosyl- and glucosyl transferases in the N-glycan biosynthesis pathway that use dolichyl phosphate D-mannose or dolichyl phosphate D-glucose as donor, derive from duplications of a common ancestral enzyme (Oriol R et al, 2002). Defects in ALG3 are associated with Congenital Disorder of Glycosylation 1D (CDG1D) (Sun L et al, 2005).
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Addition of the sixth mannose to the N-glycan precursor by ALG3.
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