ID 1.3.99.8 DE 2-furoyl-CoA dehydrogenase. AN Furoyl-CoA hydroxylase. CA 2-furoyl-CoA + H(2)O + acceptor = S-(5-hydroxy-2-furoyl)-CoA + reduced CA acceptor. CF Copper. CC -!- The oxygen atom of the -OH produced is derived from water, not O(2). CC -!- The actual oxidative step is probably dehydrogenation of a hydrated CC form -CHOH-CH(2)- to -C(OH)=CH-, which tautomerizes non-enzymically CC to -CO-CH(2)-, giving (5-oxo-4,5-dihydro-2-furoyl)-CoA. CC -!- Methylene blue, nitro blue tetrazolium and a membrane fraction from CC Pseudomonas putida can act as acceptors. //