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Effects of Different G-Protein alpha-Subunits on Growth, Development and Secondary Metabolism of Monascus ruber M7

文献类型： 外文期刊

作者： Lei, Ming 1 ; Liu, Jiao 2 ; Fang, Yang 3 ; Shao, Yanchun 1 ; Li, Li 4 ; Yu, Jae-Hyuk 5 ; Chen, Fusheng 1 ;

作者机构： 1.Huazhong Agr Univ, Coll Food Sci & Technol, Hubei Int Sci & Technol Cooperat Base Tradit Ferm, Wuhan, Hubei, Peoples R China

2.Hubei Acad Agr Sci, Inst Qual Standard & Testing Technol Agroprod, Wuhan, Hubei, Peoples R China

3.Natl Engn Res Ctr Nat Med, Chengdu, Sichuan, Peoples R China

4.Yangtze Univ, Coll Life Sci, Jingzhou, Peoples R China

5.Univ Wisconsin, Dept Bacteriol, Madison, WI 53706 USA

6.Univ Wisconsin, Dept Genet, Madison, WI 53706 USA

7.Konkuk Univ, Dept Syst Biotechnol, Seoul, South Korea

关键词： Monascus ruber; G-protein alpha-subunit; development; secondary metabolism; transcriptomic analysis

期刊名称：FRONTIERS IN MICROBIOLOGY （ 影响因子：5.64； 五年影响因子：6.32 ）

ISSN： 1664-302X

年卷期： 2019 年 10 卷

页码：

收录情况： SCI

摘要： Strains of Monascus filamentous fungal species have been used to produce fermented foods in Asian countries, such as China, Japan, and The Korean Peninsula, for nearly 2,000 years. At present, their fermented products are widely used as food additives and nutraceutical supplements worldwide owing to their production of beneficial secondary metabolites. Heterotrimeric G-protein signaling pathways participate in regulating multiple biological processes in fungi. Previously, we identified three Monascus ruber M7 G-protein a subunits (Mga1-3) and demonstrated that Mga1 can regulate growth, reproduction and some secondary metabolites' production. Here, we systematically analyzed and compared the roles of mga1-3 by combining single- and double-gene(s) knockouts and their transcriptomic data. First, mga2 and mga3 knock-out mutants and pairwise combinations of mga1-3 deletion strains were generated. Then the changes in growth, development and the main secondary metabolites, Monascus pigments and citrinin, in these mutants were systematically compared with M. ruber M7. Moreover, RNA-Seq analyses of these mutants were performed. All three G alpha subunits worked together to regulate biological processes in M. ruber M7, with Mga1 playing a major role, while Mga2 and Mga3 playing supplemental roles. According to the existing literatures which we can find, gene knock-out mutants of the pairwise combination of mga1-3 and their transcriptome analysis are first reported in this study. The current results have clearly demonstrated the functional division of Mga1-3 in M. ruber M7, and could provide a deeper understanding of the effects of different G alpha subunits on growth, development and secondary metabolism in other filamentous fungi.

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