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.
lytic polysaccharide monooxygenase (LPMO) auxiliary activity family 9 (AA9). AA9 proteins are copper-dependent lytic polysaccharide monooxygenases (LPMOs) involved in the cleavage of cellulose chains with oxidation of carbons C1 and/or C4 and C6. Activities include lytic cellulose monooxygenase (C1-hydroxylating) (EC 1.14.99.54) and lytic cellulose monooxygenase (C4-dehydrogenating) (EC 1.14.99.56). The family used to be called GH61 because weak endoglucanase activity had been demonstrated in some family members.
adventurous gliding motility protein GltJ. Adventurous gliding motility protein GltJ, also known as AgmX, occurs in delta-proteobacteria such as Myxococcus xanthus.