Exo-1,4-beta-D-glucosaminidase

Exo-1,4-beta-D-glucosaminidase (EC 3.2.1.165, CsxA, GlcNase, exochitosanase, GlmA, exo-beta-D-glucosaminidase, chitosan exo-1,4-beta-D-glucosaminidase) is an enzyme with systematic name chitosan exo-(1->4)-beta-D-glucosaminidase.! This enzyme catalyses the following chemical reaction

Hydrolysis of chitosan or chitosan oligosaccharides to remove successive D-glucosamine residues from the non-reducing termini

Chitosan is a partially or totally N-deacetylated chitin derivative that is found in the cell walls of some phytopathogenic fungi .

References

Nanjo F, Katsumi R, Sakai K (June 1990). "Purification and characterization of an exo-beta-D-glucosaminidase, a novel type of enzyme, from Nocardia orientalis". The Journal of Biological Chemistry. 265 (17): 10088–94. PMID 2351651.
Nogawa M, Takahashi H, Kashiwagi A, Ohshima K, Okada H, Morikawa Y (March 1998). "Purification and Characterization of Exo-beta-d-Glucosaminidase from a Cellulolytic Fungus, Trichoderma reesei PC-3-7". Applied and Environmental Microbiology. 64 (3): 890–5. PMC 106342. PMID 16349528.
Fukamizo T, Fleury A, Côté N, Mitsutomi M, Brzezinski R (November 2006). "Exo-beta-D-glucosaminidase from Amycolatopsis orientalis: catalytic residues, sugar recognition specificity, kinetics, and synergism". Glycobiology. 16 (11): 1064–72. doi:10.1093/glycob/cwl026. PMID 16877749.
Côté N, Fleury A, Dumont-Blanchette E, Fukamizo T, Mitsutomi M, Brzezinski R (March 2006). "Two exo-beta-D-glucosaminidases/exochitosanases from actinomycetes define a new subfamily within family 2 of glycoside hydrolases". The Biochemical Journal. 394 (Pt 3): 675–86. doi:10.1042/bj20051436. PMC 1383717. PMID 16316314.
Ike M, Isami K, Tanabe Y, Nogawa M, Ogasawara W, Okada H, Morikawa Y (October 2006). "Cloning and heterologous expression of the exo-beta-D-glucosaminidase-encoding gene (gls93) from a filamentous fungus, Trichoderma reesei PC-3-7". Applied Microbiology and Biotechnology. 72 (4): 687–95. doi:10.1007/s00253-006-0320-y. PMID 16636831.

External links

Exo-1,4-beta-D-glucosaminidase at the U.S. National Library of Medicine Medical Subject Headings (MeSH)

Hydrolase: sugar hydrolases (EC 3.2)

3.2.1: Glycoside hydrolases

Disaccharidase	Sucrase/Sucrase-isomaltase/Invertase Maltase Trehalase Lactase
Glucosidases	Cellulase Alpha-glucosidase Acid Neutral AB Neutral C Beta-glucosidase cytosolic Debranching enzyme
Other	Amylase Alpha-amylase Chitinase Lysozyme Neuraminidase NEU1 NEU2 NEU3 NEU4 Bacterial neuraminidase Viral neuraminidase Galactosidases Alpha Beta alpha-Mannosidase Glucuronidase Klotho Hyaluronidase Pullulanase Glucosylceramidase lysosomal non-lysosomal Galactosylceramidase Alpha-N-acetylgalactosaminidase NAGA Alpha-N-acetylglucosaminidase Fucosidase Hexosaminidase HEXA HEXB Iduronidase Maltase-glucoamylase Heparanase HPSE2

3.2.2: Hydrolysing
N-Glycosyl compounds

DNA glycosylases: Oxoguanine glycosylase

v t e Enzymes
Activity	Active site Binding site Catalytic triad Oxyanion hole Enzyme promiscuity Diffusion-limited enzyme Cofactor Enzyme catalysis
Regulation	Allosteric regulation Cooperativity Enzyme inhibitor Enzyme activator
Classification	EC number Enzyme superfamily Enzyme family List of enzymes
Kinetics	Enzyme kinetics Eadie–Hofstee diagram Hanes–Woolf plot Lineweaver–Burk plot Michaelis–Menten kinetics
Types	EC1 Oxidoreductases (list) EC2 Transferases (list) EC3 Hydrolases (list) EC4 Lyases (list) EC5 Isomerases (list) EC6 Ligases (list) EC7 Translocases (list)

Portal:

Biology

Category:

EC 3.2.1