FB2026_03 , released September 17, 2026
CV Term Report
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General Information
Term alpha-1,4-glucan glucosyltransferase (UDP-glucose donor) activity ID (Ontology) GO:0004373 (Gene Ontology)
Definition Catalysis of the reaction: [(1->4)-alpha-D-glucosyl](n) + UDP-alpha-D-glucose = [(1->4)-alpha-D-glucosyl](n+1) + H+ + UDP.
Also Known As"glycogen (starch) synthetase activity" ; "glyucogen (starch) synthase activity"
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Data ClassFieldDirect annotations
Genes (FBgn)GO_MOLECULAR_FUNCTION
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 alpha-1,4-glucan glucosyltransferase (UDP-glucose donor) activity (all annotations which use CV term, excluding "NOT" statements)
     enables | alpha-1,4-glucan glucosyltransferase (UDP-glucose donor) activity
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UDP-glycosyltransferase activity
 |__UDP-glucosyltransferase activity___________________________________
glucosyltransferase activity                                           |
 |__alpha-1,4-glucan glucosyltransferase (NDP-glucose donor) activity__|
 |__UDP-glucosyltransferase activity___________________________________|
                                                                       alpha-1,4-glucan glucosyltransferase (UDP-glucose donor) activity  1 rec.
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Is a alpha-1,4-glucan glucosyltransferase (NDP-glucose donor) activity
UDP-glucosyltransferase activity
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Synonyms
  • "glycogen (starch) synthetase activity" EXACT
    "glyucogen (starch) synthase activity" EXACT
    "UDP-glucose-glycogen glucosyltransferase activity" RELATED[ EC:2 ]
    "UDP-glucose:glycogen 4-alpha-D-glucosyltransferase activity" RELATED[ EC:2 ]
    "UDP-glycogen synthase activity" RELATED[ EC:2 ]
    "UDPG-glycogen synthetase activity" RELATED[ EC:2 ]
    "UDPG-glycogen transglucosylase activity" RELATED[ EC:2 ]
    "UDPglucose:glycogen 4-alpha-D-glucosyltransferase activity" RELATED[ EC:2 ]
    "uridine diphosphoglucose-glycogen glucosyltransferase activity" RELATED[ EC:2 ]
Secondary IDs
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EC:2.4.1.11
MetaCyc:RXN-7668
Reactome:R-HSA-3322001 "GYS1 catalyzes the polyglucosylation of oligoGlc-GYG1"
Reactome:R-HSA-3322009 "GYS2 catalyzes the polyglucosylation of oligoGlc-GYG2"
Reactome:R-HSA-3322041 "Phosphorylated GYS1 catalyzes the polyglucosylation of oligoGlc-GYG1"
Reactome:R-HSA-3828061 "Defective GYS1 does not transfer glucose to growing glycogen chains"
Reactome:R-HSA-3858506 "Defective GYS2 does not transfer glucose to growing glycogen chains"
RHEA:18549