Abstract
In this study, a recombinant Saccharomyces cerevisiae strain W303-EAT overexpressing the alcohol acetyltransferase (AAT) gene EAT was constructed by the homologous recombination principle. The results showed that, compared the recombinant strain W303-EAT to its parent W303-1A, there were no significant differences in the growth performance, CO2 loss, alcohol content, and reducing sugar content. Bioinformatics analysis results demonstrated that AAT protein is a hydrophobic, secreted, and non-transmembrane protein. Then, the differences in fermentation performance and aroma-producing characteristics between the recombinant strain W303-EAT and its parent strain W303-1A were studied by low-alcohol fermentation wines. The results showed that the rice wine, blueberry wine, and rose wine of the recombinant strain W303-EAT applied to the fermentation produced higher ethyl acetate than its parent strain W303-1A. Meanwhile, we found that the rice wine, blueberry wine, and rose wine fermented by the recombinant strain W303-EAT had lower contents of isobutanol, isoamylol, and phenethanol than its parent strain W303-1A, indicating that the recombinant strain W303-EAT had an inevitable effect of reducing higher alcohol contents. This study provided a better understanding of aroma-producing characteristics in recombinant Saccharomyces cerevisiae strain W303-EAT overexpressing the EAT gene.
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Funding
This research was supported by Science and Technology Platform and Talent Team Project of Guizhou Province, Grant number [2018]5251; Talent Base of Fermentation Engineering and Liquor Making in Guizhou Province, Grant number [2018]3; Zunyi City Innovative Talent Team Program Project, Grant number [2020]9; Excellent Young Scientific and Technological Talent Program, Grant number [2019]5645.
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XW and PL formal analysis, data curation, writing—original draft preparation. WX, HZ, XL, SQ, and SB conceptualization, writing—original draft preparation, funding acquisition. XW, KS, SQ, and SB investigation, methodology. XW, SQ, and SB conceptualization, funding acquisition. KS and ST formal analysis, data curation. HZ and XL resources. SB writing—reviewing and editing. XW and SQ supervision.
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Wang, X., Shen, K., Tang, S. et al. Study on the construction and aroma-producing characteristics of the recombinant Saccharomyces cerevisiae strain W303-EAT. Eur Food Res Technol 248, 447–456 (2022). https://doi.org/10.1007/s00217-021-03890-z
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DOI: https://doi.org/10.1007/s00217-021-03890-z