EC - Arabinogalactan endo-β-1,4-galactanase

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IntEnz Enzyme Nomenclature


Accepted name:
arabinogalactan endo-β-1,4-galactanase
Other names:
galactanase [ambiguous]
ganB (gene name)
Systematic name:
arabinogalactan 4-β-D-galactanohydrolase



This enzyme, isolated from the bacterium Bacillus subtilis, hydrolyses the β(1→4) bonds found in type I plant arabinogalactans, which are a component of the primary cell walls of dicots. The predominant product is a tetrasaccharide. cf. EC, galactan endo-β-1,3-galactanase.

Links to other databases

Enzymes and pathways: NC-IUBMB , BRENDA , ExplorEnz , ENZYME@ExPASy , KEGG , MetaCyc , UniPathway
Structural data: CSA , EC2PDB
Gene Ontology: GO:0031218
CAS Registry Number: 58182-40-4
UniProtKB/Swiss-Prot: (16) [show] [UniProt]


  1. Emi, S. and Yamamoto, T.
    Purification and properties of several galactanases of Bacillus subtilis var. amylosacchariticus.
    Agric. Biol. Chem. 36 : 1945-1954 (1972).
  2. Labavitch, J.M., Freeman, L.E. and Albersheim, P.
    Structure of plant cell walls. Purification and characterization of a β-1,4-galactanase which degrades a structural component of the primary cell walls of dicots.
    J. Biol. Chem. 251 : 5904-5910 (1976). [PMID: 823153]
  3. Shipkowski, S., Brenchley, J. E.
    Bioinformatic, genetic, and biochemical evidence that some glycoside hydrolase family 42 beta-galactosidases are arabinogalactan type I oligomer hydrolases.
    Appl. Environ. Microbiol. 72 : 7730-7738 (2006). [PMID: 17056685]

[EC created 1976, modified 2012]