IUBMB Enzyme Nomenclature


Accepted name: N,N'-diacetylchitobiose non-reducing end deacetylase

Reaction: N,N'-diacetylchitobiose + H2O = β-D-glucosaminyl-(1→4)-N-acetyl-D-glucosamine + acetate

Other name(s): diacetylchitobiose deacetylase (ambiguous); cda (gene name)

Systematic name: N,N'-diacetylchitobiose non-reducing end acetylhydrolase

Comments: The enzyme, characterized from the archaeons Thermococcus kodakarensis and Pyrococcus horikoshii, deacetylates the non-reducing residue of N,N'-diacetylchitobiose, the end product of the archaeal chitinase, to produce β-D-glucosaminyl-(1→4)-N-acetyl-D-glucosamine. This is in contrast to EC, chitin disaccharide deacetylase, which deacetylates N,N'-diacetylchitobiose at the reducing residue to produce N-acetyl-β-D-glucosaminyl-(1→4)-D-glucosamine.

Links to other databases: BRENDA, EXPASY, KEGG, MetaCyc, CAS registry number:


1. Tanaka, T., Fukui, T., Fujiwara, S., Atomi, H. and Imanaka, T. Concerted action of diacetylchitobiose deacetylase and exo-β-D-glucosaminidase in a novel chitinolytic pathway in the hyperthermophilic archaeon Thermococcus kodakaraensis KOD1. J. Biol. Chem. 279 (2004) 30021-30027. [PMID: 15136574]

2. Mine, S., Ikegami, T., Kawasaki, K., Nakamura, T. and Uegaki, K. Expression, refolding, and purification of active diacetylchitobiose deacetylase from Pyrococcus horikoshii. Protein Expr. Purif. 84 (2012) 265-269. [PMID: 22713621]

3. Nakamura, T., Yonezawa, Y., Tsuchiya, Y., Niiyama, M., Ida, K., Oshima, M., Morita, J. and Uegaki, K. Substrate recognition of N,N'-diacetylchitobiose deacetylase from Pyrococcus horikoshii. J. Struct. Biol. 195 (2016) S1047-8477(. [PMID: 27456364]

[EC created 2020]

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