Regulation of secondary metabolite biosynthesis in Monascus purpureus via cofactor metabolic engineering strategies

Jun Liu; Jingyan Wu; Xinru Cai; Song Zhang; Ying Liang; Qinlu Lin

doi:10.1016/j.fm.2020.103689

Regulation of secondary metabolite biosynthesis in Monascus purpureus via cofactor metabolic engineering strategies

Food Microbiol. 2021 May:95:103689. doi: 10.1016/j.fm.2020.103689. Epub 2020 Nov 23.

Authors

Jun Liu¹, Jingyan Wu¹, Xinru Cai¹, Song Zhang¹, Ying Liang¹, Qinlu Lin²

Affiliations

¹ National Engineering Laboratory for Deep Process of Rice and By-products, Hunan Key Laboratory of Grain-oil Deep Process and Quality Control, Hunan Key Laboratory of Processed Food for Special Medical Purpose, College of Food Science and Engineering, Central South University of Forestry and Technology, Changsha, Hunan, 410004, China.
² National Engineering Laboratory for Deep Process of Rice and By-products, Hunan Key Laboratory of Grain-oil Deep Process and Quality Control, Hunan Key Laboratory of Processed Food for Special Medical Purpose, College of Food Science and Engineering, Central South University of Forestry and Technology, Changsha, Hunan, 410004, China. Electronic address: linqinlu@hotmail.com.

PMID: 33397619
DOI: 10.1016/j.fm.2020.103689

Abstract

This study investigated the effects of cofactor metabolism on secondary metabolite production in M. purpureus through the application of different cofactor engineering strategies. Total pigment production dramatically increased by 39.08% and 40.89%, and yellow pigment production increased by 74.62% and 114.06% after the addition of 1.0 mg/L of the exogenous cofactor reagents methyl viologen and rotenone, respectively, in submerged batch-fermentation. The extracellular red pigment tone changed to yellow with the application of electrolytic stimulation at 800 mV/cm², but almost no citrinin production was detected. In addition, the total pigment, yellow pigment and citrinin production increased by 35.46%, 54.89% and 6.27% after disruption of the nuoⅠ gene that encodes NADH-quinone oxidoreductase, respectively. Thus, cofactor metabolic engineering strategies could be extended to the industrial production of Monascus pigment or high yellow pigment with free citrinin production.

Keywords: Cofactor; Electrolytic stimulation; M. purpureus; Yellow monascus pigment.

MeSH terms

Citrinin / biosynthesis
Culture Media / metabolism*
Metabolic Engineering
Monascus / genetics*
Monascus / metabolism*
Paraquat / metabolism*
Pigments, Biological / biosynthesis*
Rotenone / metabolism*
Secondary Metabolism

Substances

Culture Media
Pigments, Biological
Rotenone
Citrinin
Paraquat