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 galactanases are endo galactanases and a few are exo.[1]
3D structures of beta-1,4-galactanase
Updated on 03-May-2021
1hjs, 1hju – BGAL – Thielavia heterothallica
1fhl, 1fob, 6q3r – BGAL- Aspergillus aculeatus
1hjq – BGAL – Humicola insolens
1ur0, 1r8l, 2ccr, 2j74 – BlBGAL – Bacillus licheniformis
1ur4 – BlBGAL + β-1,4-galactobioside
2gft - BlBGAL + galactotriose
4bf7 – endo-BGAL – Emericella nidulans
6gp5 – BtBGAL – Bacterioides thetaiotaomicron
6gpa - BtBGAL + galactose
References
- ↑ Le Nours J, Ryttersgaard C, Lo Leggio L, Ostergaard PR, Borchert TV, Christensen LL, Larsen S. Structure of two fungal beta-1,4-galactanases: searching for the basis for temperature and pH optimum. Protein Sci. 2003 Jun;12(6):1195-204. PMID:12761390
