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Function
Xylosidase (XYL) catalyzes the hydrolysis of α- or β-glycosidic linkages.
- α-XYL catalyzes the exo-hydrolysis of 1,4-β-D-glycosidic or exo-hydrolysis of 1,3-β-D-glycosidic linkage from the non-reducing termini of xylans[1]. XYL catalyzes the conversion of cellulose and hemicellulose xylan to xylose.
- β-XYL catalyzes the endo-hydrolysis of 1,4-β-D-glycosidic or endo-hydrolysis of 1,3-β-D-glycosidic linkage[2].
- α-XYL family 31 catalyzes the hydrolysis of α-xylosyl from isoprimeverose[3].
- β-XYL family 3 catalyzes the endo-hydrolysis of 1,4-β-D-glycosidic or endo-hydrolysis of 1,3-β-D-glycosidic linkage[4].
Structural highlights
The [5]. Water molecules are shown as red spheres. .
3D Structures of xylosidase
Xylosidase 3D structures
References
- ↑ Moracci M, Cobucci Ponzano B, Trincone A, Fusco S, De Rosa M, van Der Oost J, Sensen CW, Charlebois RL, Rossi M. Identification and molecular characterization of the first alpha -xylosidase from an archaeon. J Biol Chem. 2000 Jul 21;275(29):22082-9. PMID:10801892 doi:http://dx.doi.org/10.1074/jbc.M910392199
- ↑ Martinez GA, Chaves AR, Civello PM. beta-xylosidase activity and expression of a beta-xylosidase gene during strawberry fruit ripening. Plant Physiol Biochem. 2004 Feb;42(2):89-96. PMID:15283123 doi:http://dx.doi.org/10.1016/j.plaphy.2003.12.001
- ↑ Nakamichi Y, Matsuzawa T, Watanabe M, Yaoi K. Crystal structure of glycoside hydrolase family 31 α-xylosidase from a soil metagenome. Biosci Biotechnol Biochem. 2022 Jun 25;86(7):855-864. PMID:35441671 doi:10.1093/bbb/zbac058
- ↑ Kojima K, Sunagawa N, Mikkelsen NE, Hansson H, Karkehabadi S, Samejima M, Sandgren M, Igarashi K. Comparison of Glycoside Hydrolase family 3 beta-xylosidases from basidiomycetes and ascomycetes reveals evolutionarily distinct xylan degradation systems. J Biol Chem. 2022 Feb 1:101670. doi: 10.1016/j.jbc.2022.101670. PMID:35120929 doi:http://dx.doi.org/10.1016/j.jbc.2022.101670
- ↑ Larsbrink J, Izumi A, Ibatullin F, Nakhai A, Gilbert HJ, Davies GJ, Brumer H. Structural and enzymatic characterisation of a Glycoside Hydrolase Family 31 alphaxylosidase from Cellvibrio japonicus involved in xyloglucan saccharification. Biochem J. 2011 Mar 22. PMID:21426303 doi:10.1042/BJ20110299
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