Reaction: fluoroacetyl-CoA + H2O = fluoroacetate + CoA
Systematic name: fluoroacetyl-CoA hydrolase
Comments: Fluoroacetate is extremely toxic. It reacts with CoA to form fluoroacetyl-CoA, which substitutes for acetyl CoA and reacts with EC 22.214.171.124 (citrate synthase) to produce fluorocitrate, a metabolite of which binds very tightly to EC 126.96.36.199 (aconitase) and halts the TCA cycle. This enzyme hydrolyses fluoroacetyl-CoA before it can react with citrate synthase, and thus confers fluoroacetate resistance on the organisms that produce it. It has been described in the poisonous plant Dichapetalum cymosum and the bacterium Streptomyces cattleya, both of which are fluoroacetate producers.
Links to other databases: BRENDA, EXPASY, KEGG, Metacyc, PDB, CAS registry number:
1. Meyer, J.J.M., Grobbelaar, N., Vleggaar, R. and Louw, A.I. Fluoroacetyl-coenzyme-A hydrolase-like activity in Dichapetalum cymosum. J. Plant Physiol. 139 (1992) 369-372.
2. Huang, F., Haydock, S.F., Spiteller, D., Mironenko, T., Li, T.L., O'Hagan, D., Leadlay, P.F. and Spencer, J.B. The gene cluster for fluorometabolite biosynthesis in Streptomyces cattleya: a thioesterase confers resistance to fluoroacetyl-coenzyme A. Chem. Biol. 13 (2006) 475-484. [PMID: 16720268]
3. Dias, M.V., Huang, F., Chirgadze, D.Y., Tosin, M., Spiteller, D., Dry, E.F., Leadlay, P.F., Spencer, J.B. and Blundell, T.L. Structural basis for the activity and substrate specificity of fluoroacetyl-CoA thioesterase FlK. J. Biol. Chem. 285 (2010) 22495-22504. [PMID: 20430898]