Abstract
The protein phosphatase inhibitor RK-682 is one of a number of potentially valuable tetronate polyketide natural products. Understanding how the tetronate ring is formed has been frustrated by the inaccessibility of the putative substrates. We report the heterologous expression of rk genes in Saccharopolyspora erythraea and reconstitution of the RK-682 pathway using recombinant enzymes, and we show that RkD is the enzyme required for RK-682 formation from acyl carrier protein–bound substrates.
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Acknowledgements
This work was supported by the Biotechnology and Biological Sciences Research Council through project grant BB/D018943/1 to P.F.L. F.H. was supported by a Deutsche Forschungsgemeinschaft Research Fellowship and a Marie Curie Intra-European Fellowship. M.T. was supported by a fellowship from the Herchel Smith Fund of Cambridge University.
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Y.S., H.O. and P.F.L. formulated the project; Y.S., Y.D. and J.C. carried out cloning and analysis of the gene cluster; Y.S. carried out gene knockouts, heterologous expression and in vitro reconstitution; F.H. carried out chemical synthesis and part of the in vitro reconstitution; M.T. carried out high-resolution mass analysis; Y.S., H.O. and P.F.L. wrote the manuscript.
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Sun, Y., Hahn, F., Demydchuk, Y. et al. In vitro reconstruction of tetronate RK-682 biosynthesis. Nat Chem Biol 6, 99–101 (2010). https://doi.org/10.1038/nchembio.285
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DOI: https://doi.org/10.1038/nchembio.285
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