Glycoside hydrolase, family 79 (IPR005199)

Short name: Glyco_hydro_79

Overlapping homologous superfamilies

Family relationships



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.

This is a family of endo-beta-N-glucuronidase, or heparanase belonging to glycoside hydrolase family 79 (GH79). Heparan sulphate proteoglycans (HSPGs) play a key role in the self- assembly, insolubility and barrier properties of basement membranes and extracellular matrices. Hence, cleavage of heparan sulphate (HS) affects the integrity and functional state of tissues and thereby fundamental normal and pathological phenomena involving cell migration and response to changes in the extracellular microenvironment. Heparanase degrades HS at specific intrachain sites. The enzyme is synthesized as a latent approximately 65kDa protein that is processed at the N terminus into a highly active approximately 50kDa form. Experimental evidence suggests that heparanase may facilitate both tumor cell invasion and neovascularization, both critical steps in cancer progression. The enzyme is also involved in cell migration associated with inflammation and autoimmunity [PMID: 11530216].

GO terms

Biological Process

No terms assigned in this category.

Molecular Function

GO:0016798 hydrolase activity, acting on glycosyl bonds

Cellular Component

GO:0016020 membrane

Contributing signatures

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