ENZYME

ENZYME entry: EC 3.2.1.164

Accepted Name

Galactan endo-1,6-beta-galactosidase.

Alternative Name(s)

Endo-1,6-beta-galactanase.

Endo-beta-(1->6)-galactanase.

Reaction catalysed

Endohydrolysis of (1->6)-beta-D-galactosidic linkages in arabinogalactan proteins and (1->3):(1->6)-beta-galactans to yield galactose and beta-(1->6)-galactaobiose as the final products

Comment(s)

Specifically hydrolyzes 1,6-beta-D-galactooligosaccharides with a degree of polymerization (DP) higher than 3, and their acidic derivatives with 4-O-methylglucosyluronate or glucosyluronate groups at the non-reducing terminals.
1,3-beta-D- and 1,4-beta-D-galactosyl residues cannot act as substrates.
Can also hydrolyze alpha-L-arabinofuranosidase-treated arabinogalactan protein (AGP) extracted from radish roots.
AGPs are thought to be involved in many physiological events, such as cell division, cell expansion and cell death.

Cross-references

BRENDA

3.2.1.164

EC2PDB

3.2.1.164

ExplorEnz

3.2.1.164

PRIAM enzyme-specific profiles

3.2.1.164

KEGG Ligand Database for Enzyme Nomenclature

3.2.1.164

IUBMB Enzyme Nomenclature