Metabolomics Analysis of the Effect of Glutamic Acid on Monacolin K Synthesis in Monascus purpureus

Monacolin K is a secondary metabolite produced by with beneficial effects on health, including the ability to lower cholesterol. We previously showed that the yield of monacolin K was significantly improved when glutamic acid was added to the fermentation broth of M1. In this study, we analyzed in m...

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Bibliographic Details
Published in:Frontiers in microbiology 2020-12, Vol.11, p.610471
Main Authors: Zhang, Chan, Zhang, Nan, Chen, Mengxue, Wang, Haijiao, Shi, Jiachen, Wang, Bei, Sun, Baoguo, Wang, Chengtao
Format: Article
Language:English
Subjects:
citric acid
glutamic acid
metabolomics
Microbiology
monacolin K
monascus
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Summary:Monacolin K is a secondary metabolite produced by with beneficial effects on health, including the ability to lower cholesterol. We previously showed that the yield of monacolin K was significantly improved when glutamic acid was added to the fermentation broth of M1. In this study, we analyzed in media with and without glutamic acid supplementation using a metabolomic profiling approach to identify key metabolites and metabolic pathway differences. A total of 817 differentially expressed metabolites were identified between the two fermentation broths on day 8 of fermentation. Pathway analysis of these metabolites using the KEGG database indicated overrepresentation of the citric acid cycle; biotin metabolism; and alanine, aspartate, and glutamate metabolic pathways. Six differentially expressed metabolites were found to be related to the citric acid cycle. The effect of citric acid as an exogenous additive on the synthesis of monacolin K was examined. These results provide technical support and a theoretical basis for further studies of the metabolic regulatory mechanisms underlying the beneficial effects of monacolin K and medium optimization, as well as genetic engineering of M1 for efficient monacolin K production.
ISSN:1664-302X
1664-302X
DOI:10.3389/fmicb.2020.610471