Enhancing (2S)-naringenin production in Saccharomyces cerevisiae by high-throughput screening method based on ARTP mutagenesis.

Abstract

(2S)-Naringenin, a dihydro-flavonoid, serves as a crucial precursor for flavonoid synthesis due to its extensive medicinal values and physiological functions. A pathway for the synthesis of (2S)-naringenin from glucose has previously been constructed in Saccharomyces cerevisiae through metabolic engineering. However, this synthetic pathway of (2S)-naringenin is lengthy, and the genes involved in the competitive pathway remain unknown, posing challenges in significantly enhancing (2S)-naringenin production through metabolic modification. To address this issue, a novel high-throughput screening (HTS) method based on color reaction combined with a random mutagenesis method called atmospheric room temperature plasma (ARTP), was established in this study. Through this approach, a mutant (B7-D9) with a higher titer of (2S)-naringenin was obtained from 9600 mutants. Notably, the titer was enhanced by 52.3% and 19.8% in shake flask and 5 L bioreactor respectively. This study demonstrates the successful establishment of an efficient HTS method that can be applied to screen for high-titer producers of (2S)-naringenin, thereby greatly improving screening efficiency and providing new insights and solutions for similar product screenings.