Conserved Site

Glycoside hydrolase, family 6, conserved site (IPR001524)

Short name: Glyco_hydro_6_CS


O-Glycosyl hydrolases (EC:3.2.1.) are a widespread group of enzymes that hydrolyse the glycosidic bond between two or more carbohydrates, or between a carbohydrate and a non-carbohydrate moiety. A classification system for glycosyl hydrolases, based on sequence similarity, has led to the definition of 85 different families [PMID: 7624375, PMID: 8535779]. This classification is available on the CAZy (CArbohydrate-Active EnZymes) web site.

Glycoside hydrolase family 6 GH6 comprises enzymes with several known activities; endoglucanase (EC:; cellobiohydrolase (EC: These enzymes were formerly known as cellulase family B.

The 3D structure of the enzymatic core of cellobiohydrolase II (CBHII) from the fungus Trichoderma reesei reveals an alpha-beta protein with a fold similar to the ubiquitous barrel topology first seen in triose phosphate isomerase [PMID: 2377893]. The active site of CBHII is located at the C-terminal end of a parallel beta barrel, in an enclosed tunnel through which the cellulose threads. Two aspartic acid residues, located in the centre of the tunnel are the probable catalytic residues [PMID: 2377893].

GO terms

Biological Process

GO:0005975 carbohydrate metabolic process

Molecular Function

GO:0004553 hydrolase activity, hydrolyzing O-glycosyl compounds

Cellular Component

No terms assigned in this category.

Contributing signatures

Signatures from InterPro member databases are used to construct an entry.
PROSITE patterns
PROSITE patterns