Cyclohexane-1,2-dione hydrolase: A new tool to degrade alicyclic compounds

Fraas, S.; Steinbach, A.K.; Tabbert, A.; Harder, J.; Ermler, U.; Tittmann, K.; Meyer, A.; Kroneck, P.M.H.

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Cyclohexane-1,2-dione hydrolase: A new tool to degrade alicyclic compounds

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Harder, J.
Department of Microbiology, Max Planck Institute for Marine Microbiology, Max Planck Society;

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Fraas, S., Steinbach, A., Tabbert, A., Harder, J., Ermler, U., Tittmann, K., et al. (2009). Cyclohexane-1,2-dione hydrolase: A new tool to degrade alicyclic compounds. Journal of Molecular Catalysis B, 61(1-2 Sp. Iss. Sp. Iss. SI), 47-49.

Cite as: http://hdl.handle.net/21.11116/0000-0001-CBAE-7

Abstract

Alicyclic alcohols are naturally occurring compounds which can be degraded by microorganisms via cleavage of the ring C–C bond. Denitrifying Azoarcus sp. strain 22Lin grows on cyclohexane-1,2-diol which serves as electron donor and carbon source. The diol is converted to cyclohexane-1,2-dione followed by hydrolysis to the corresponding semialdehyde and oxidation to adipate. The latter two reactions are catalyzed by the thiamine diphosphate-dependent flavoenzyme cyclohexane-1,2-dione hydrolase, the first α-ketolase known so far. Biochemical and structural properties of this new member of the thiamine diphosphate enzyme family will be presented.