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Glycosyl hydrolases family 25
crystal structure of the bacterial lysozyme from streptomyces coelicolor at 1.65 a resolution
Identifiers
Symbol	Glyco_hydro_25
Pfam	PF01183
Pfam clan	CL0058
InterPro	IPR002053
PROSITE	PDOC00737
SCOP2	1jfx / SCOPe / SUPFAM
CAZy	GH25
Available protein structures: Pfam   structures / ECOD   PDB RCSB PDB; PDBe; PDBj PDBsum structure summary

In molecular biology, glycoside hydrolase family 25 is a family of glycoside hydrolases.

Glycoside 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 glycoside hydrolases, based on sequence similarity, has led to the definition of >100 different families. This classification is available on the CAZy web site, and also discussed at CAZypedia, an online encyclopedia of carbohydrate active enzymes.

Glycoside hydrolase family 25 CAZY GH_25 comprises enzymes with only one known activity; lysozyme (EC 3.2.1.17). It has been shown that a number of cell-wall lytic enzymes are evolutionary related and can be classified into a single family. Two residues, an aspartate and a glutamate, have been shown to be important for the catalytic activity of the Charalopsis enzyme. These residues as well as some others in their vicinity are conserved in all proteins from this family.

References

1. Henrissat B, Callebaut I, Fabrega S, Lehn P, Mornon JP, Davies G (July 1995). "Conserved catalytic machinery and the prediction of a common fold for several families of glycosyl hydrolases". Proceedings of the National Academy of Sciences of the United States of America. 92 (15): 7090–4. Bibcode:1995PNAS...92.7090H. doi:10.1073/pnas.92.15.7090. PMC 41477. PMID 7624375.
2. Davies G, Henrissat B (September 1995). "Structures and mechanisms of glycosyl hydrolases". Structure. 3 (9): 853–9. doi:10.1016/S0969-2126(01)00220-9. PMID 8535779.
3. Henrissat B, Bairoch A (June 1996). "Updating the sequence-based classification of glycosyl hydrolases". The Biochemical Journal. 316 (Pt 2): 695–6. doi:10.1042/bj3160695. PMC 1217404. PMID 8687420.
4. "Home". CAZy.org. Retrieved 2018-03-06.
5. Lombard V, Golaconda Ramulu H, Drula E, Coutinho PM, Henrissat B (January 2014). "The carbohydrate-active enzymes database (CAZy) in 2013". Nucleic Acids Research. 42 (Database issue): D490-5. doi:10.1093/nar/gkt1178. PMC 3965031. PMID 24270786.
6. "Glycoside Hydrolase Family 25". CAZypedia.org. Retrieved 2018-03-06.
7. CAZypedia Consortium (December 2018). "Ten years of CAZypedia: a living encyclopedia of carbohydrate-active enzymes" (PDF). Glycobiology. 28 (1): 3–8. doi:10.1093/glycob/cwx089. PMID 29040563.
8. Henrissat B (December 1991). "A classification of glycosyl hydrolases based on amino acid sequence similarities". The Biochemical Journal. 280 (2): 309–16. doi:10.1042/bj2800309. PMC 1130547. PMID 1747104.
9. Croux C, García JL (July 1991). "Sequence of the lyc gene encoding the autolytic lysozyme of Clostridium acetobutylicum ATCC824: comparison with other lytic enzymes". Gene. 104 (1): 25–31. doi:10.1016/0378-1119(91)90460-S. PMID 1916274.
10. Fouche PB, Hash JH (October 1978). "The N,O-diacetylmuramidase of Chalaropsis species. Identification of aspartyl and glutamyl residues in the active site". The Journal of Biological Chemistry. 253 (19): 6787–93. doi:10.1016/S0021-9258(17)37988-7. PMID 567645.

• Biology

• EC 3.2.1
• Glycoside hydrolase families
• Protein families