FB2026_03 , released September 17, 2026
CV Term Report
Help Close All Open All
General Information
Term glycogenin glucosyltransferase activity ID (Ontology) GO:0008466 (Gene Ontology)
Definition Catalysis of the reaction: UDP-glucose + glycogenin = UDP + glucosylglycogenin. This first reaction is a self glucosylation. Further UDP-glucose goups are added to the [1,4-alpha-D-glucosyl](n) group of glycogenin until a length of about 5-13 residues.
Also Known As"1,4alpha-glucan-protein synthase (UDP-forming) activity" ; "alpha-1,4-glucan-protein synthase (UDP-forming) activity"
Comment
Links to External Ontologies
  QuickGO data     AmiGO data
Annotations
Records annotated with this term OR any of its CHILD TERMS

Choose a record type to view annotations for this term and its child terms. Direct annotations and full annotation statements below also provide HitList buttons.

    • Results list data from multiple species. Choose a record type above to open its HitList.
Direct annotations: records annotated with this exact term (child terms are NOT included)
Data ClassFieldDirect annotations
Genes (FBgn)GO_MOLECULAR_FUNCTION
show Full annotation statements including this term (annotations to child terms are NOT included), and relevant FlyBase records
 Full annotation statements 
Relevant FlyBase reports
 Genes
 glycogenin glucosyltransferase activity (all annotations which use CV term, excluding "NOT" statements)
     enables | glycogenin glucosyltransferase activity
Spanning Tree (Parents/Children)
Only view relationship:
Vocabulary search 
UDP-glycosyltransferase activity__
glucosyltransferase activity______|
                                  UDP-glucosyltransferase activity
                                   |__glycogenin glucosyltransferase activity  1 rec.
Spanning Tree View Settings
Parents/Children
View Depth
Show hierarchy levels: for parents, for children
hide Relationships
Is a UDP-glucosyltransferase activity
Part of
hide Synonyms & Secondary IDs
Synonyms
  • "1,4alpha-glucan-protein synthase (UDP-forming) activity" EXACT
    "alpha-1,4-glucan-protein synthase (UDP-forming) activity" EXACT
    "glycogenin activity" RELATED[ EC:2 ]
    "priming glucosyltransferase activity" RELATED[ EC:2 ]
    "UDP-alpha-D-glucose:glycogenin alpha-D-glucosyltransferase activity" RELATED[ EC:2 ]
    "UDP-glucose:glycogenin glucosyltransferase activity" RELATED[ EC:2 ]
Secondary IDs
hide External Crossreferences & Linkouts
EC:2.4.1.186
MetaCyc:GLYCOGENIN-GLUCOSYLTRANSFERASE-RXN
MetaCyc:RXN-7667
Reactome:R-HSA-3322003 "Autoglucosylation of GYG1 complexed with GYS1-b"
Reactome:R-HSA-3322014 "Autoglucosylation of GYG2 complexed with GYS2-a"
Reactome:R-HSA-3322019 "Autoglucosylation of GYG2 complexed with GYS2-b"
Reactome:R-HSA-3322025 "Autoglucosylation of GYG1 complexed with GYS1-a"
Reactome:R-HSA-3814838 "Defective GYG1 is not autoglucosyolated"
RHEA:23360
RHEA:56560