Enhanced production of d‐psicose 3‐epimerase in Bacillus subtilis by regulation of segmented fermentation. (29th October 2019)

• Record Type: Journal Article
• Authors: Fu, Gang; Zhang, Shibin; Dong, Huina; Chen, Jingqi; Tu, Ran; Zhang, Dawei
• Other Names: Bao Jie guestEditor.; Catucci Gianluca guestEditor.; Valetti Francesca guestEditor.
• Is Part Of: Biotechnology and applied biochemistry. Volume 67:Number 5(2020)
• Page Start: 812
• Page End: 818
• Publication Date: 2019-10-29
• Subjects: Bacillus subtilis -- d‐psicose 3‐epimerase -- segmented fermentation; Biotechnology -- Periodicals; Biochemical engineering -- Periodicals; Biochemistry -- Periodicals; Biochemistry -- Periodicals; Genetic Techniques -- Periodicals; Microbiological Techniques -- Periodicals; 660.6
• DOI: 10.1002/bab.1831
• Languages: English
• ISSNs: 0885-4513

Abstract

Abstract: d ‐Psicose 3‐epimerase is an enzyme that catalyzes the synthesis of d ‐psicose from d ‐fructose. We cloned the d ‐psicose 3‐epimerase from Ruminococcus sp. (RDPE) and expressed it in Bacillus subtilis A311. By a two‐step pH regulation of segmented fermentation, we significantly improved the RDPE production and decreased the fermentation cost. The two‐step regulation consisted of the first step maintained the pH value at 7.0 for 24 H and the second step adjusted the pH value up to 7.5 slowly for another 24 H. Finally, the RDPE production was increased to 74 U/mL, which was about 2.5‐fold compared with the control. Our segmented fermentation strategy provides an important experimental basis for the industrial‐scale production of RDPE.