Lytic polysaccharide mono-oxygenase, cellulose-degrading. This domain is found associated with a wide variety of cellulose binding domains. This is a family of two very closely related proteins that together act as both a C1- and a C4-oxidising lytic polysaccharide mono-oxygenase, degrading cellulose. This domain is also found in baculoviral spheroidins and spindolins, protein of unknown function.
Glycosyl hydrolase family 61. Although weak endoglucanase activity has been demonstrated in several members of this family, they lack the clustered conserved catalytic acidic amino acids present in most glycoside hydrolases. Many members of this family lack measurable cellulase activity on their own, but enhance the activity of other cellulolytic enzymes. They are therefore unlikely to be true glycoside hydrolases. The subsrate-binding surface of this family is a flat Ig-like fold.