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- Title
Induction of point and structural mutations in engineered yeast Saccharomyces cerevisiae improve carotenoid production.
- Authors
Yamada, Ryosuke; Ando, Kazuya; Sakaguchi, Rumi; Matsumoto, Takuya; Ogino, Hiroyasu
- Abstract
β-Carotene is an attractive compound and that its biotechnological production can be achieved by using engineered Saccharomyces cerevisiae. In a previous study, we developed a technique for the efficient establishment of diverse mutants through the introduction of point and structural mutations into the yeast genome. In this study, we aimed to improve β-carotene production by applying this mutagenesis technique to S. cerevisiae strain that had been genetically engineered for β-carotene production. Point and structural mutations were introduced into β-carotene-producing engineered yeast. The resulting mutants showed higher β-carotene production capacity than the parental strain. The top-performing mutant, HP100_74, produced 37.6 mg/L of β-carotene, a value 1.9 times higher than that of the parental strain (20.1 mg/L). Gene expression analysis confirmed an increased expression of multiple genes in the glycolysis, mevalonate, and β-carotene synthesis pathways. In contrast, expression of ERG9, which functions in the ergosterol pathway competing with β-carotene production, was decreased in the mutant strain. The introduction of point and structural mutations represents a simple yet effective method for achieving mutagenesis in yeasts. This technique is expected to be widely applied in the future to produce chemicals via metabolic engineering of S. cerevisiae.
- Subjects
SACCHAROMYCES cerevisiae; ERGOSTEROL; CAROTENES; GENE expression; GENETIC mutation; YEAST; MUTAGENESIS
- Publication
World Journal of Microbiology & Biotechnology, 2024, Vol 40, Issue 7, p1
- ISSN
0959-3993
- Publication type
Article
- DOI
10.1007/s11274-024-04037-4