Abstract
Fungal type I fatty acid synthases (FASs) are mega-enzymes with two separated, identical compartments, in which the acyl carrier protein (ACP) domains shuttle substrates to catalytically active sites embedded in the chamber wall. We devised synthetic FASs by integrating heterologous enzymes into the reaction chambers and demonstrated their capability to convert acyl-ACP or acyl-CoA from canonical fatty acid biosynthesis to short/medium-chain fatty acids and methyl ketones.
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Acknowledgements
This work was funded by grants from Total New Energies, the Novo Nordisk Foundation, and the Knut and Alice Wallenberg Foundation to J.N. and from the National Natural Science Foundation of China to Z.K.Z. (No. 21325627). We thank H.-J. Schüller (Ernst-Moritz-Arndt-Universität Greifswald, Germany) for sharing the PWY12 strain; J.L. Collier (Stony Brook University, USA) for providing genomic DNA of A. kerguelense; C. Song and J. Li (Dalian Institute of Chemical Physics), respectively, for the MALDI–TOF Mass Spectrometry analysis and ultracentrifugation; and S. Khoomrung and the Chalmers Mass Spectrometry Infrastructure (J. Karlsson and J. Kindbom) for assistance with GC–MS analysis. We also appreciate the help from and/or discussion with S. Zhang, W. Liu, X. Lin, V. Siewers, Y. Chen, M. Fischer, Z. Dai, N.A. Buijs, P. Teixeira and O. Vidalin.
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Z.Z., Z.K.Z. and J.N. conceived this study. Z.Z. designed and performed most of the experiments and analyzed the data. Z.Z. and Z.K.Z. performed biochemical study of Rhodosporidium fatty acid synthase (FAS) at Dalian Institute of Chemical Physics. Y.J.Z. participated in the plasmid construction and product quantification. A.K. assisted with data analysis and interpretation. M.G. developed the ketoacyl synthase (KS) mutation. Z.Z. and J.N. wrote the manuscript. All authors revised and approved the manuscript.
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Z.Z., A.K. and J.N. are listed as co-inventors on a patent application related to fatty acid production. J.N. and A.K. are shareholders in Biopetrolia AB.
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Supplementary Results, Supplementary Tables 1–7 and Supplementary Figures 1–9. (PDF 7299 kb)
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Zhu, Z., Zhou, Y., Krivoruchko, A. et al. Expanding the product portfolio of fungal type I fatty acid synthases. Nat Chem Biol 13, 360–362 (2017). https://doi.org/10.1038/nchembio.2301
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DOI: https://doi.org/10.1038/nchembio.2301
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