Beta-1,4-galactanase (BGAL) is a cell-wall-degrading enzyme. BGAL hydrolyses β-1,4-galactan in the hairy regions of pectin. Specific galactanases exist for hydrolysing β-1,3, β-1,4, β-1,5 and β-1,6 galacto-pyranosyl linkages. These enzymes degrade D-galactan to produce D-galactose and D-galacto-oligosaccharides. Most galactanses are endo galactanases and a few are exo.
3D structures of beta-1,4-galactanase
1hjs, 1hju – BGAL – Thielavia heterothallica
1fhl, 1fob – BGAL- Aspergillus aculeatus
1hjq – BGAL – Humicola insolens
1ur0, 1r8l, 2ccr, 2j74 – BlBGAL – Bacillus licheniformis
1ur4 – BlBGAL + β-1,4-galactobioside
