Glycoside hydrolase family 5

Cellulase (glycosyl hydrolase family 5)
Identifiers
Symbol	Cellulase
Pfam	PF00150
Pfam clan	CL0058
InterPro	IPR001547
PROSITE	PDOC00565
SCOP2	2exo / SCOPe / SUPFAM
OPM superfamily	117
OPM protein	2osx
CAZy	GH5
Membranome	1365
Available protein structures: Pfam   structures / ECOD   PDB RCSB PDB; PDBe; PDBj PDBsum structure summary

In molecular biology, glycoside hydrolase family 5 is a family of glycoside hydrolases EC 3.2.1., which 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. ^{[1] [2] [3]} This classification is available on the CAZy web site, ^{[4] [5]} and also discussed at CAZypedia, an online encyclopedia of carbohydrate active enzymes. ^{[6] [7]}

Glycoside hydrolase family 5 CAZY GH_5 comprises enzymes with several known activities including endoglucanase (EC 3.2.1.4); beta-mannanase (EC 3.2.1.78); exo-1,3-glucanase (EC 3.2.1.58); endo-1,6-glucanase (EC 3.2.1.75); xylanase (EC 3.2.1.8); endoglycoceramidase (EC 3.2.1.123); xanthanase. ^[8]

The microbial degradation of cellulose and xylans requires several types of enzymes. 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 A ^[9] or as the glycosyl hydrolases family 5. ^[10] One of the conserved regions in this family contains a conserved glutamic acid residue which is potentially involved ^[11] in the catalytic mechanism.

In a recent study using Molecular Dynamics simulations, a considerable correlation between thermal stability and structural rigidity of members of family 5 with solved structures has been proved. ^[12]

External links

• GH5 in CAZypedia

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 5". 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 . hdl:21.11116/0000-0003-B7EB-6. PMID   29040563.
8. Ostrowski, Matthew P.; La Rosa, Sabina Leanti; Kunath, Benoit J.; Robertson, Andrew; Pereira, Gabriel; Hagen, Live H.; Varghese, Neha J.; Qiu, Ling; Yao, Tianming; Flint, Gabrielle; Li, James; McDonald, Sean P.; Buttner, Duna; Pudlo, Nicholas A.; Schnizlein, Matthew K.; Young, Vincent B.; Brumer, Harry; Schmidt, Thomas M.; Terrapon, Nicolas; Lombard, Vincent; Henrissat, Bernard; Hamaker, Bruce; Eloe-Fadrosh, Emiley A.; Tripathi, Ashootosh; Pope, Phillip B.; Martens, Eric C. (April 2022). "Mechanistic insights into consumption of the food additive xanthan gum by the human gut microbiota". Nature Microbiology. 7 (4): 556–569. doi:10.1038/s41564-022-01093-0. PMID   35365790. S2CID   247866305.
9. Henrissat B, Claeyssens M, Tomme P, Lemesle L, Mornon JP (September 1989). "Cellulase families revealed by hydrophobic cluster analysis". Gene. 81 (1): 83–95. doi:10.1016/0378-1119(89)90339-9. PMID   2806912.
10. 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.
11. Py B, Bortoli-German I, Haiech J, Chippaux M, Barras F (February 1991). "Cellulase EGZ of Erwinia chrysanthemi: structural organization and importance of His98 and Glu133 residues for catalysis". Protein Engineering. 4 (3): 325–33. doi:10.1093/protein/4.3.325. PMID   1677466.
12. Badieyan S, Bevan DR, Zhang C (January 2012). "Study and design of stability in GH5 cellulases". Biotechnology and Bioengineering. 109 (1): 31–44. doi:10.1002/bit.23280. PMID   21809329. S2CID   29281420.