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Protein engineering of invertase for enhancing yeast dough fermentation under high-sucrose conditions
Y. Zhao, K. Meng, J. Fu, S. Xu, G. Cai, G. Meng, J. Nielsen, Z. Liu, Y. Zhang
Jazyk angličtina Země Česko
Typ dokumentu časopisecké články
- MeSH
- fermentace MeSH
- glukosa metabolismus MeSH
- invertasa * genetika metabolismus MeSH
- proteinové inženýrství MeSH
- Saccharomyces cerevisiae * metabolismus MeSH
- sacharosa metabolismus MeSH
- Publikační typ
- časopisecké články MeSH
During yeast dough fermentation, such as the high-sucrose bread-making process, the yeast cells are subjected to considerable osmotic stress, resulting in poor outcomes. Invertase is important for catalyzing the irreversible hydrolysis of sucrose to free glucose and fructose, and decreasing the catalytic activity of the invertase may reduce the glucose osmotic stress on the yeast. In this study, we performed structural design and site-directed mutagenesis (SDM) on the Saccharomyces cerevisiae invertase (ScInV) in an Escherichia coli expression system to study the catalytic activity of ScInV mutants in vitro. In addition, we generated the same mutation sites in the yeast endogenous genome and tested their invertase activity in yeast and dough fermentation ability. Our results indicated that appropriately reduced invertase activity of yeast ScInV can enhance dough fermentation activity under high-sucrose conditions by 52%. Our systems have greatly accelerated the engineering of yeast endogenous enzymes both in vitro and in yeast, and shed light on future metabolic engineering of yeast.
Citace poskytuje Crossref.org
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