Abstract
This chapter gives an overview of the “minimum genome factory” (MGF) of the fission yeast Schizosaccharomyces pombe (S. pombe). The S. pombe genome is one of the smallest found in free-living eukaryotes. We engineered a reduction in the number of S. pombe genes using a large-scale gene deletion method called the LATOUR method. This method enabled us to identify the minimum gene set required for growth under laboratory conditions. The genome-reduced strain has four deleted regions: 168.4 kb of the left arm of chromosome I; 155.4 kb of the right arm of chromosome I; 211.7 kb of the left arm of chromosome II; and 121.6 kb of the right arm of chromosome II. These changes represent a loss of 223 genes of an estimated 5,100. The 657.3-kb deletion strain was less efficient at taking up glucose and some amino acids from the growth media than the parental strain. This strain also showed increased gene expression of the mating pheromone M-factor precursor and NADP-specific glutamate dehydrogenase. There was also a 2.7-fold increase in the concentration of cellular ATP, whereas levels of heterologously produced proteins, such as the green fluorescent protein and the secreted human growth hormone, increased by 1.7 fold and 1.8 fold, respectively.
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Acknowledgments
This study was partly supported by the Ministry of Economy, Trade and Industry (Project for the Development of a Technological Infrastructure for Industrial Bioprocesses on Research and Development of New Industrial Science and Technology Frontiers supported by New Energy and Industrial Technology Development Organization). We are sincerely grateful to the late Yuko Giga-Hama.
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Kumagai, H., Sasaki, M., Idiris, A., Tohda, H. (2014). Minimum Genome Factories in Schizosaccharomyces pombe . In: Anazawa, H., Shimizu, S. (eds) Microbial Production. Springer, Tokyo. https://doi.org/10.1007/978-4-431-54607-8_2
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DOI: https://doi.org/10.1007/978-4-431-54607-8_2
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