ID 1.3.99.8 DE 2-furoyl-CoA dehydrogenase. AN furoyl-CoA hydroxylase. CA 2-furoyl-CoA + A + H2O = 5-hydroxy-2-furoyl-CoA + AH2 + H(+). CC -!- The oxygen atom of the -OH produced is derived from water, not O2. CC -!- The actual oxidative step is probably dehydrogenation of a hydrated CC form -CHOH-CH2- to -C(OH)=CH-, which tautomerizes non-enzymically to CC -CO-CH2-, 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. //