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Table 2 CAZymes with key functions for plant cell wall degradation in the plant biomass degradation modules

From: Inference of phenotype-defining functional modules of protein families for microbial plant biomass degraders

Type

Subtype

Module

    
  

M1

M2

M3

M4

M5

Cellulases [8]

Endoglucanase (EC 3.2.1.4)

GH5, GH9

–

GH5

GH5

GH124

 

Cellobiohydrolase (EC 3.2.1.91)

GH5, GH9

–

GH5

GH5

–

 

β-glucosidase (EC 3.2.1.21)

GH9

GH30

–

GH3

–

Hemicellulases [8],[9]

Endo-1,4-β-xylanase (1,4-β-d-xylan xylanohydrolases, EC 3.2.1.8)

GH5, GH10, GH43

–

GH5, GH43

GH5, GH43

–

 

β-xylosidase (1,4-β-d-xylan xylohydrolase, EC 3.2.1.37)

GH43

GH30

GH43

GH3, GH43

–

 

β-arabinofuranosidase (EC 3.2.1.55)

GH43

–

GH43

GH3, GH43

–

 

β-glucuronidase (EC 3.2.1.139)

–

–

–

–

–

 

Acetyl xylan esterase (EC 3.1.1.72)

–

–

CE6, CE7, CE12

–

–

 

Ferulic acid esterase (EC 3.1.1.73)

–

–

–

–

–

 

Xyloglucanase (EC 3.2.1.151); xyloglucosyltransferase (EC 2.4.1.207)

–

GH16

–

–

–

Carbohydrate-binding modules [48],[49]

Targeting cellulose

CBM4

–

–

–

CBM3

 

Targeting xylan

CBM4, CBM6, CBM35

CBM6, CBM13, CBM35

  

CBM36

Cellulosomes [14]

Structural components

–

–

–

–

Cohesin, dockerin

Pectinolytic enzymes [10]

Pectin methyl esterase (EC 3.1.1.11)

–

–

CE8

–

–

 

Endopolygalacturonase (EC 3.2.1.15); exopolygalacturonase (EC 3.2.1.67)

–

–

GH28

–

–

 

Endopolygalacturonase lyase (EC 4.2.2.2); exopolygalacturonase lyase (EC 4.2.2.9)

–

–

PL1, PL9

–

–

 

Pectin lyase (EC 4.2.2.10)

–

–

PL1

–

–