Table 1.

Glycoside hydrolase genes required for complete depolymerization of the cellulose and hemicellulose fractions of lignocellulose and enzymes encoded by genes in the A. acidocaldarius genome

Glycosyl hydrolase activity required for lignocellulose depolymerization	Presence in A. acidocaldarius
Cellulose
Endo-β-1,4-glucanase (EC 3.2.1.4)	X
1,4-β-glucan glucanohydrolase (EC 3.2.1.74)
1,4-β-glucan cellobiohydrolase (EC 3.2.1.91)
β-Glucosidase (EC 3.2.1.21)	X
Hemicellulose
Endo-β-1,4-xylanase (EC 3.2.1.8)	X
Exo-β-1,4-xylosidase or β-xylosidase (EC 3.2.1.37)	X
α-l-arabinofuranosidase (EC 3.2.1.55)	X
Endo-α-1,5-arabinanase (EC 3.2.1.99)
α-Glucuronidase (EC 3.2.1.139)	X
Endo-β-1,4-mannanase (EC 3.2.1.78)
Exo-β-1,4-mannosidase (EC 3.2.1.25)
α-Galactosidase (EC 3.2.1.22)
β-Glucosidase (EC 3.2.1.21)	X
Endo-β-1,4-galactanase (EC 3.2.1.89)
Acetylxylan esterase (EC 3.1.1.72)	X
Acetylmannan esterase (EC 3.1.1.6)
Ferulic and p-coumaric acid esterases (EC 3.1.1.73)	X