Summary
The biosynthesis of avermectins was studied further inStreptomyces avermitilis MA5502 by feeding experiments with labeled precursors.13C-NMR analysis of the compounds biosynthesized from [2-13C]acetate, [1,2-13C2]acetate, [3-13C]propionate and [2,3-13C2]propionate confirmed that the aglycone of avermectins is made from seven intact acetate and five propionate units. Feeding experiments with [1-13C]2-methylbutyrate and [1-13C]isobutyrate have shown that 2-methylbutyrate and isobutyrate are immediate precursors of the starter units of the polyketide chains of avermectin ‘a’ and ‘b’ components, respectively. The3H/14C doublelabeling experiments suggest that the two oleandrose moieties are derived from glucose.
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Chen, T.S., Arison, B.H., Gullo, V.P. et al. Further studies on the biosynthesis of the avermectins. Journal of Industrial Microbiology 4, 231–237 (1989). https://doi.org/10.1007/BF01574080
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DOI: https://doi.org/10.1007/BF01574080