Glycosyl hydrolase family 53. This domain belongs to family 53 of the glycosyl hydrolase classification. These enzymes are enzymes are endo-1,4- beta-galactanases (EC:3.2.1.89). The structure of this domain is known and has a TIM barrel fold.

Arabinogalactan endo-1,4-beta-galactosidase [Carbohydrate transport and metabolism].

Glycoside hydrolase family 113 beta-1,4-mannanase and similar proteins. Mannan endo-1,4-beta mannosidase (E.C 3.2.1.78) randomly cleaves (1->4)-beta-D-mannosidic linkages in mannans, galactomannans and glucomannans and is also called beta-1,4-mannanase, endo-1,4-beta-mannanase, endo-beta-1,4-mannase, beta-mannanase B, beta-1, 4-mannan 4-mannanohydrolase, endo-beta-mannanase, beta-D-mannanase, 1,4-beta-D-mannan mannanohydrolase, and 4-beta-D-mannan mannanohydrolase. (1->4)-beta-linked mannans are polysaccharides with a linear polymer backbone of (1->4)-beta-linked mannose units (in plants and fungi) or alternating mannose and glucose/galactose units (glucomannan in plants and fungi, and galactomannan and galactoglucomannan in plants), such as in the hemicellulose fraction of hard- and softwoods. Complete degradation of mannan requires a series of enzymes, including beta-1,4-mannanase. According to the CAZy database beta-1,4-mannanases are grouped into various glycoside hydrolase (GH) families; GH family 113 beta-1,4-mannanases include mostly bacterial and archaeal sequences.

Beta-1,4-galactanasefrom Bacteroides thetaiotaomicron with galactose [Bacteroides thetaiotaomicron VPI-5482],6GPA_B Beta-1,4-galactanase from Bacteroides thetaiotaomicron with galactose [Bacteroides thetaiotaomicron VPI-5482]

Beta-1,4-galactanasefrom Bacteroides thetaiotaomicron [Bacteroides thetaiotaomicron VPI-5482],6GP5_B Beta-1,4-galactanase from Bacteroides thetaiotaomicron [Bacteroides thetaiotaomicron VPI-5482]

Emericillanidulans endo-beta-1,4-galactanase [Aspergillus nidulans]

Structureof two fungal beta-1,4-galactanases: searching for the basis for temperature and pH optimum. [Thermothelomyces thermophilus],1HJS_B Structure of two fungal beta-1,4-galactanases: searching for the basis for temperature and pH optimum. [Thermothelomyces thermophilus],1HJS_C Structure of two fungal beta-1,4-galactanases: searching for the basis for temperature and pH optimum. [Thermothelomyces thermophilus],1HJS_D Structure of two fungal beta-1,4-galactanases: searching for the basis for temperature and pH optimum. [Thermothelomyces thermophilus],1HJU_A Structure of two fungal beta-1,4-galactanases: searching for the basis for temperature and pH optimum. [Thermothelomyces thermophilus],1HJU_B Structure of two fungal beta-1,4-galactanases: searching for the basis for temperature and pH optimum. [Thermothelomyces thermophilus],1HJU_C Structure of two fungal beta-1,4-galactanases: searching for the basis for temperature and pH optimum. [Thermothelomyces thermophilus],1HJU_D Structure of two fungal beta-1,4-galactanases: searching for the basis for temperature and pH optimum. [Thermothelomyces thermophilus]

Structureof two fungal beta-1,4-galactanases: searching for the basis for temperature and pH optimum. [Humicola insolens]

Probable arabinogalactan endo-beta-1,4-galactanase A OS=Neosartorya fischeri (strain ATCC 1020 / DSM 3700 / CBS 544.65 / FGSC A1164 / JCM 1740 / NRRL 181 / WB 181) OX=331117 GN=galA PE=3 SV=1

Probable arabinogalactan endo-beta-1,4-galactanase A OS=Neosartorya fumigata (strain CEA10 / CBS 144.89 / FGSC A1163) OX=451804 GN=galA PE=3 SV=2

Probable arabinogalactan endo-beta-1,4-galactanase A OS=Neosartorya fumigata (strain ATCC MYA-4609 / Af293 / CBS 101355 / FGSC A1100) OX=330879 GN=galA PE=3 SV=2

Arabinogalactan endo-beta-1,4-galactanase A OS=Emericella nidulans (strain FGSC A4 / ATCC 38163 / CBS 112.46 / NRRL 194 / M139) OX=227321 GN=galA PE=1 SV=2

Probable arabinogalactan endo-beta-1,4-galactanase A OS=Aspergillus terreus (strain NIH 2624 / FGSC A1156) OX=341663 GN=galA PE=3 SV=1