Table 1 List of CAZyme families potentially involved in pectin breakdown and inventory of these CAZymes in Bacteroides xylanisolvens XB1A
CAZyme family | Enzyme function | Number of CAZymes | Putative aligosaccharide target within pectins |
|---|---|---|---|
Glycoside hydrolases (GH) | |||
GH2 | β-galactosidase | 23 | RGI side chain |
GH28 | polygalacturonase. rhamno-galaturonase, … | 9 | HG/RGI/RGII |
GH35 | β-galactosidase, exo-β-1,4-galactanase … | 2 | RGI side chain |
GH42 | β-galactosidase, α-L-arabinofuranosidase | 1 | RGI side chain |
GH43 | α-L-arabinofuranosidase, arabinanase … | 27 | RGI side chain |
GH51 | α-L-arabinofuranosidase | 4 | RGI side chain |
GH53 | endo-β-1,4-galactanase | 0 | RGI side chain |
GH54 | α-L-arabinofuranosidase/β-xylosidase | 0 | RGI side chain |
GH78 | α-L-rhamnosidase | 7 | RGI |
GH88 | d-4,5 unsaturated β-glucuronyl hydrolase | 5 | RGII side chain |
GH93 | exo-α-L-1,5-arabinanase | 0 | RGI side chain |
GH95 | fucosidase | 4 | RGII side chain |
GH105 | unsaturated rhamnogalacturonyl hydrolase | 5 | HG /RGI |
GH106 | α-L-rhamnosidase | 3 | RGI |
GH127 | α-L-arabinofuranosidase | 1 | RGI side chain |
Polysaccharide lyases (PL) | |||
PL1 | pectate lyase/exo-pectate lyase/pectin lyase | 5 | HG/RGII |
PL3 | pectate lyase | 0 | HG/RGII |
PL4 | rhamnogalacturonan lyase | 0 | RGI |
PL9 | pectate lyase/exopolygalacturonate lyase | 1 | HG/RGII |
PL10 | pectate lyase | 1 | HG/RGII |
PL11 | rhamnogalacturonan lyase | 4 | RGI |
Carbohydrate esterases (CE) | |||
CE8 | pectin methylesterase | 2 | HG |
CE12 | pectin methylesterase/rhamnogalacturonan acetylesterase | 4 | HG/RGI |
CE13 | pectin methylesterase | 0 | HG |