5-nitrosalicylate dioxygenase

5-nitrosalicylate dioxygenase (, naaB (gene)) is an enzyme with systematic name 5-nitrosalicylate:oxygen 1,2-oxidoreductase (decyclizing). This enzyme catalyses the following chemical reaction


 * 5-nitrosalicylate + O2 $$\rightleftharpoons$$ 2-oxo-3-(5-oxofuran-2-ylidene)propanoate + nitrite (overall reaction)
 * (1a) 5-nitrosalicylate + O2 $$\rightleftharpoons$$ 4-nitro-6-oxohepta-2,4-dienedioate
 * (1b) 4-nitro-6-oxohepta-2,4-dienedioate $$\rightleftharpoons$$ 2-oxo-3-(5-oxofuran-2-ylidene)propanoate + nitrite (spontaneous reaction)

The enzyme from soil bacterium ''Bradyrhizobium sp. JS329'' participates in 5-nitroanthranilate degradation.