The enzyme from the soil bacterium Streptomyces sp. CL190 produces acetoacetyl-CoA to be used for mevalonate production via the mevalonate pathway.
Unlike the homologous EC 184.108.40.206 (β-ketoacyl-[acyl-carrier-protein] synthase III), this enzyme does not accept malonyl-[acyl-carrier-protein] as a substrate.
Okamura, E., Tomita, T., Sawa, R., Nishiyama, M. and Kuzuyama, T. Unprecedented acetoacetyl-coenzyme A synthesizing enzyme of the thiolase superfamily involved in the mevalonate pathway. Proc. Natl. Acad. Sci. USA107 (2010) 11265–11270. [PMID: 20534558]