Active Site

Glycosyl hydrolases family 9, Asp/Glu active sites (IPR033126)

Short name: Glyco_hydro_9_Asp/Glu_AS


The microbial degradation of cellulose and xylans requires several types of enzymes such as endoglucanases, cellobiohydrolases (exoglucanases), or xylanases [PMID: 2252383, PMID: 1886523]. Fungi and bacteria produces a spectrum of cellulolytic enzymes (cellulases) and xylanases which, on the basis of sequence similarities, can be classified into families. One of these families is known as the cellulase family E [PMID: 2806912] or as the glycosyl hydrolases family 9 [PMID: 1747104].

Two of the most conserved regions in these enzymes are centred on conserved residues which have been shown [PMID: 2037583, PMID: 1637316], in the endoglucanase D from Cellulomonas thermocellum, to be important for the catalytic activity. The first region contains an active site histidine and the second region contains two catalytically important residues: an aspartate and a glutamate. This entry represents the second region.

Contributing signatures

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