Reaction: (1) [N-(6-aminohexanoyl)]n + H2O = [N-(6-aminohexanoyl)]n-1 + 6-aminohexanoate
(2) N-(6-aminohexanoyl)-6-aminohexanoate + H2O = 2 6-aminohexanoate
Other name(s): 6-aminohexanoate-dimer hydrolase; nylB (gene name); 6-aminohexanoic acid oligomer hydrolase (ambiguous); N-(6-aminohexanoyl)-6-aminohexanoate amidohydrolase; nylon-6 hydrolase (ambiguous)
Systematic name: N-(6-aminohexanoyl)-6-aminohexanoate exoamidohydrolase
Comments: The enzyme is involved in degradation of nylon-6 oligomers. It degrades linear oligomers of 6-aminohexanoate with a degree of polymerization of 2-20 by exo-type cleavage, removing residues sequentially from the N-terminus. Activity decreases with the increase of the polymerization number of the oligomer. cf. EC 3.5.1.117, 6-aminohexanoate-oligomer endohydrolase and EC 3.5.2.12, 6-aminohexanoate-cyclic-dimer hydrolase.
Links to other databases: BRENDA, EAWAG-BBD, EXPASY, KEGG, MetaCyc, PDB, CAS registry number: 75216-15-8
References:
1. Kinoshita, S., Terada, T., Taniguchi, T., Takeney, Y., Masuda, S., Matsunaga, N. and Okada, H. Purification and characterization of 6-aminohexanoic-acid-oligomer hydrolase of Flavobacterium sp. KI72. Eur. J. Biochem. 116 (1981) 547-551. [PMID: 7262074]