The Enzyme Database

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Accepted name: chitin disaccharide deacetylase
Reaction: N,N′-diacetylchitobiose + H2O = N-acetyl-β-D-glucosaminyl-(1→4)-D-glucosamine + acetate
Glossary: N,N′-diacetylchitobiose = N-acetyl-β-D-glucosaminyl-(1→4)-N-acetyl-D-glucosamine
Other name(s): chitobiose amidohydolase; COD; chitin oligosaccharide deacetylase; chitin oligosaccharide amidohydolase; 2-(acetylamino)-4-O-[2-(acetylamino)-2-deoxy-β-D-glucopyranosyl]-2-deoxy-D-glucopyranose acetylhydrolase
Systematic name: N,N′-diacetylchitobiose acetylhydrolase
Comments: Chitin oligosaccharide deacetylase is a key enzyme in the chitin catabolic cascade of chitinolytic Vibrio strains. Besides being a nutrient, the heterodisaccharide product 4-O-(N-acetyl-β-D-glucosaminyl)-D-glucosamine is a unique inducer of chitinase production in Vibrio parahemolyticus [2]. In contrast to EC (chitin deacetylase) this enzyme is specific for the chitin disaccharide [1,3]. It also deacetylates the chitin trisaccharide with lower efficiency [3]. No activity with higher polymers of GlcNAc [1,3].
Links to other databases: BRENDA, EXPASY, KEGG, MetaCyc
1.  Kadokura, K., Rokutani, A., Yamamoto, M., Ikegami, T., Sugita, H., Itoi, S., Hakamata, W., Oku, T. and Nishio, T. Purification and characterization of Vibrio parahaemolyticus extracellular chitinase and chitin oligosaccharide deacetylase involved in the production of heterodisaccharide from chitin. Appl. Microbiol. Biotechnol. 75 (2007) 357–365. [PMID: 17334758]
2.  Hirano, T., Kadokura, K., Ikegami, T., Shigeta, Y., Kumaki, Y., Hakamata, W., Oku, T. and Nishio, T. Heterodisaccharide 4-O-(N-acetyl-β-D-glucosaminyl)-D-glucosamine is a specific inducer of chitinolytic enzyme production in Vibrios harboring chitin oligosaccharide deacetylase genes. Glycobiology 19 (2009) 1046–1053. [PMID: 19553519]
3.  Ohishi, K., Yamagishi, M., Ohta, T., Motosugi, M., Izumida, H., Sano, H., Adachi, K., Miwa, T. Purification and properties of two deacetylases produced by Vibrio alginolyticus H-8. Biosci. Biotechnol. Biochem. 61 (1997) 1113–1117.
4.  Ohishi, K., Murase, K., Ohta, T. and Etoh, H. Cloning and sequencing of the deacetylase gene from Vibrio alginolyticus H-8. J. Biosci. Bioeng. 90 (2000) 561–563. [PMID: 16232910]
[EC created 2010]

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