Accepted name: 2-oxo-3-(phosphooxy)propyl 3-oxoalkanoate synthase
Reaction: a medium-chain 3-oxoacyl-[acyl-carrier protein] + glycerone phosphate = 2-oxo-3-(phosphooxy)propyl 3-oxoalkanoate + a holo-[acyl-carrier protein]
Glossary: glycerone phosphate = dihydroxyacetone phosphate = 3-hydroxy-2-oxopropyl phosphate
Other name(s): afsA (gene name); scbA (gene name); barX (gene name)
Systematic name: 3-oxoacyl-[acyl-carrier protein]:glycerone phosphate 3-oxonacylltransferase
Comments: The enzyme catalyses the first committed step in the biosynthesis of γ-butyrolactone autoregulators that control secondary metabolism and morphological development in Streptomyces bacteria.
1.  Horinouchi, S., Suzuki, H., Nishiyama, M. and Beppu, T. Nucleotide sequence and transcriptional analysis of the Streptomyces griseus gene (afsA) responsible for A-factor biosynthesis. J. Bacteriol. 171 (1989) 1206–1210. [PMID: 2492509]
2.  Kato, J.Y., Funa, N., Watanabe, H., Ohnishi, Y. and Horinouchi, S. Biosynthesis of γ-butyrolactone autoregulators that switch on secondary metabolism and morphological development in Streptomyces. Proc. Natl. Acad. Sci. USA 104 (2007) 2378–2383. [PMID: 17277085]
3.  Hsiao, N.H., Soding, J., Linke, D., Lange, C., Hertweck, C., Wohlleben, W. and Takano, E. ScbA from Streptomyces coelicolor A3(2) has homology to fatty acid synthases and is able to synthesize γ-butyrolactones. Microbiology 153 (2007) 1394–1404. [PMID: 17464053]
4.  Lee, Y.J., Kitani, S. and Nihira, T. Null mutation analysis of an afsA-family gene, barX, that is involved in biosynthesis of the γ-butyrolactone autoregulator in Streptomyces virginiae. Microbiology 156 (2010) 206–210. [PMID: 19778967]
[EC created 2018]