IUBMB Enzyme Nomenclature


Accepted name: N-carbamoyl-D-amino-acid hydrolase

Reaction: an N-carbamoyl-D-amino acid + H2O = a D-amino acid + NH3 + CO2

Other name(s): D-N-carbamoylase; N-carbamoylase (ambiguous); N-carbamoyl-D-amino acid hydrolase

Systematic name: N-carbamoyl-D-amino-acid amidohydrolase

Comments: This enzyme, along with EC (N-carbamoyl-L-amino-acid hydrolase), EC (hydantoin racemase) and hydantoinase, forms part of the reaction cascade known as the "hydantoinase process", which allows the total conversion of D,L-5-monosubstituted hydantoins into optically pure D- or L-amino acids [2]. It has strict stereospecificity for N-carbamoyl-D-amino acids and does not act upon the corresponding L-amino acids or on the N-formyl amino acids, N-carbamoyl-sarcosine, -citrulline, -allantoin and -ureidopropanoate, which are substrates for other amidohydrolases.

Links to other databases: BRENDA, EXPASY, KEGG, Metacyc, PDB, CAS registry number: 71768-08-6


1. Ogawa, J., Shimizu, S., Yamada, H. N-Carbamoyl-D-amino acid amidohydrolase from Comamonas sp. E222c; purification and characterization. Eur. J. Biochem. 212 (1993) 685-691. [PMID: 8462543]

2. Altenbuchner, J., Siemann-Herzberg, M. and Syldatk, C. Hydantoinases and related enzymes as biocatalysts for the synthesis of unnatural chiral amino acids. Curr. Opin. Biotechnol. 12 (2001) 559-563. [PMID: 11849938]

[EC created 1999, modified 2008]

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