FB2026_03 , released September 17, 2026
CV Term Report
Help Close All Open All
General Information
Term galactosylgalactosylxylosylprotein 3-beta-glucuronosyltransferase activity ID (Ontology) GO:0015018 (Gene Ontology)
Definition Catalysis of the reaction: 3-O-(beta-D-galactosyl-(1->3)-beta-D-galactosyl-(1->4)-beta-D-xylosyl)-L-seryl-[protein] + UDP-alpha-D-glucuronate = 3-O-(beta-D-GlcA-(1->3)-beta-D-Gal-(1->3)-beta-D-Gal-(1->4)-beta-D-Xyl)-L-seryl-[protein] + H+ + UDP.[ EC:2 ]
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
 galactosylgalactosylxylosylprotein 3-beta-glucuronosyltransferase activity (all annotations which use CV term, excluding "NOT" statements)
     enables | galactosylgalactosylxylosylprotein 3-beta-glucuronosyltransferase activity
Spanning Tree (Parents/Children)
Only view relationship:
Vocabulary search 
UDP-glycosyltransferase activity__
hexosyltransferase activity_______|
                                  glucuronosyltransferase activity
                                   |__galactosylgalactosylxylosylprotein 3-beta-glucuronosyltransferase activity  3 rec.
Spanning Tree View Settings
Parents/Children
View Depth
Show hierarchy levels: for parents, for children
hide Relationships
Is a glucuronosyltransferase activity
Part of
hide Synonyms & Secondary IDs
Synonyms
  • "glucuronosyltransferase I activity" NARROW[ EC:2 ]
    "UDP-glucuronate:3-beta-D-galactosyl-4-beta-D-galactosyl-O-beta-D-xylosyl-protein D-glucuronosyltransferase activity" RELATED[ EC:2 ]
    "UDPglucuronate:3-beta-D-galactosyl-4-beta-D-galactosyl-O-beta-D-xylosyl-protein D-glucuronosyltransferase activity" RELATED[ EC:2 ]
    "uridine diphosphate glucuronic acid:acceptor glucuronosyltransferase activity" RELATED[ EC:2 ]
Secondary IDs
hide External Crossreferences & Linkouts
EC:2.4.1.135
MetaCyc:2.4.1.135-RXN
Reactome:R-HSA-1889955 "B3GAT dimers transfer GlcA to tetrasaccharide linker"
Reactome:R-HSA-3560802 "Defective B3GAT3 does not transfer GlcA to tetrasaccharide linker"
RHEA:24168