FB2026_03 , released September 17, 2026
CV Term Report
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General Information
Term beta-galactosidase activity ID (Ontology) GO:0004565 (Gene Ontology)
Definition Catalysis of the hydrolysis of terminal, non-reducing beta-D-galactose residues in beta-D-galactosides.[ EC:3 ]
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Data ClassFieldDirect annotations
Genes (FBgn)GO_MOLECULAR_FUNCTION
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 beta-galactosidase activity (all annotations which use CV term, excluding "NOT" statements)
     enables | beta-galactosidase activity       --
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  hydrolase activity, hydrolyzing O-glycosyl compounds
   |__galactosidase activity
       |__beta-galactosidase activity  3 rec.
           |__galactan 1,3-beta-galactosidase activity
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Is a galactosidase activity
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Synonyms
  • "beta-D-galactanase activity" RELATED
    "beta-D-galactoside galactohydrolase activity" RELATED
    "beta-D-lactosidase activity" RELATED
    "beta-lactosidase activity" RELATED
    "exo-(1->4)-beta-D-galactanase activity" RELATED[ EC:3 ]
    "hydrolact" RELATED
Secondary IDs
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EC:3.2.1.23
MetaCyc:3.2.1.23-RXN
Reactome:R-HSA-1605624 "Beta-galactosidases hydrolyse mobilized GM1 to mobilized GM2"
Reactome:R-HSA-1606312 "GLB1 hydrolyzes SapB/C:LacCer"
Reactome:R-HSA-1630306 "GLB1 hydrolyses a glycosaminoglycan"
Reactome:R-HSA-1793217 "Unknown endo--galactosidase cleaves keratan chain"
Reactome:R-HSA-2090079 "GLB1 hydrolyses linker chain(2)"
Reactome:R-HSA-2265534 "Defective GLB1 does not hydrolyse a glycosaminoglycan"
Reactome:R-HSA-9036061 "Defective GLB1 does not hydrolyse linker chain(2)"
Reactome:R-HSA-9840795 "Beta-galactosidases hydrolyze GM2A:GA1 to GM2A:GA2"