Peptide supplementation relieves stress and enhances glycolytic flux in filamentous fungi during organic acid bioproduction. Issue 9 (14th June 2022)

• Record Type: Journal Article
• Authors: Zhang, Jiahui; Wu, Na; Ou, Wen; Li, Yingfeng; Liang, Yingchao; Peng, Chao; Li, Yi; Xu, Qing; Tong, Yi
• Is Part Of: Biotechnology and bioengineering. Volume 119:Issue 9(2022)
• Page Start: 2471
• Page End: 2481
• Publication Date: 2022-06-14
• Subjects: fumaric acid -- glycolytic flux -- peptide supplementation -- Rhizopus oryzae -- stress defense; Biotechnology -- Periodicals; Bioengineering -- Periodicals; 660.6
• DOI: 10.1002/bit.28152
• Languages: English
• ISSNs: 0006-3592

Abstract

Abstract: Filamentous fungi occupy a uniquely favorable position in the bioproduction of organic acids. Intracellular stress is the main stimulator in filamentous fungi to produce and accumulate organic acids with high flux. However, stress can affect the physiological activities of filamentous fungi, thereby deteriorating their fermentation performance. Herein, we report that peptide supplementation during Rhizopus oryzae fermentation significantly improved fumaric acid production. Specifically, fumaric acid productivity was elevated by approximately 100%, fermentation duration was shortened from 72 to 36 h, while maintaining the final titer. Furthermore, transcriptome profile analysis and biochemical assays indicated that the overall capabilities of the stress defense systems (enzymatic and nonenzymatic) were significantly improved in R. oryzae . Consequently, glycolytic metabolism was distinctly enhanced, which eventually resulted in improved fumaric acid production and reduced fermentation duration. We expect our findings and efforts to provide essential insights into the optimization of the fermentation performance of filamentous fungi in industrial biotechnology and fermentation engineering.