Abstract
Methanol, an organic one-carbon (C1) compound, represents an attractive alternative carbon source for microbial fermentation. Despite considerable advancements in methanol utilization by prokaryotes such as Escherichia coli, engineering eukaryotic model organisms such as Saccharomyces cerevisiae into synthetic methylotrophs remains challenging. Here, an engineered module circuit strategy combined with adaptive laboratory evolution was applied to engineer S. cerevisiae to use methanol as the sole carbon source. We revealed that the evolved glyoxylate-based serine pathway plays an important role in methanol-dependent growth by promoting formaldehyde assimilation. Further, we determined that the isoprenoid biosynthetic pathway was upregulated, resulting in an increased concentration of squalene and ergosterol in our evolved strain. These changes could potentially alleviate cell membrane damage in the presence of methanol. This work sets the stage for expanding the potential of exploiting S. cerevisiae as a potential organic one-carbon platform for biochemical or biofuel production.
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Data availability
The RNA-seq raw data can be downloaded from the Genome Expression Omnibus website (https://www.ncbi.nlm.nih.gov/geo/) with series no. GSE173802. The accession no. for the genome sequence data of evolved strains reported in this paper is [NCBI.SRA]:[PRJNA728351]. All other data that support the findings in this study are available on request. All plasmids and strains used in this study can be obtained from Z.B. under a material transfer agreement. Source Data are provided with this paper.
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Acknowledgements
This work was supported by the National Natural Science Foundation of China (grant no. 21908077 to C.Z.), the National Key R&D Program of China (grant no. 2021YFC2100203 to Y.Y.), the national first-class discipline program of Light Industry Technology and Engineering (grant no. LITE2018-24), the 111 Project (111-2-06) and the DOE Joint BioEnergy Institute (https://www.jbei.org), and funded by the US Department of Energy, Office of Science, Office of Biological, and Environmental Research through contract no DE-AC02-05CH11231 between Lawrence Berkeley National Laboratory and the US Department of Energy.
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C.Z. conceived the study. C.Z. and X.L. designed the study, performed the experiments and data processing, and analysed the data. Z.B., J.D.K., J.N. and Y.C. supervised the project. E.E.K.B. performed the 13C-labelled experiments and analysed the data. S.W. conducted scanning electron microscopy experiment. Y.W. was involved in constructing some of the plasmids needed for the study. C.Z. and X.L. wrote the manuscript. J.D.K., G.L. and Y.L. revised the manuscript. Y.Y., Y.S. and G.W. contributed to the review, editing and final approval of the manuscript. They provided valuable insights and suggestions to improve the quality of the research paper.
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J.D.K. has financial interests in Amyris, Ansa Biotechnologies, Apertor Pharma, Berkeley Yeast, Cyklos Materials, Demetrix, Lygos, Napigen, ResVita Bio, and Zero Acre Farms. None of these companies work in the field explored in this study. All other authors declare no competing interests.
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Zhan, C., Li, X., Lan, G. et al. Reprogramming methanol utilization pathways to convert Saccharomyces cerevisiae to a synthetic methylotroph. Nat Catal 6, 435–450 (2023). https://doi.org/10.1038/s41929-023-00957-w
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DOI: https://doi.org/10.1038/s41929-023-00957-w
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