A Zn(II)(2)Cys(6) transcription factor MPsGeI suppresses pigment biosynthesis in Monascus

红曲霉 基因 转录因子 生物合成 生物化学 颜料 转录调控 生物 内含子 基因表达 抄写(语言学) 化学 细胞生物学 发酵 有机化学 哲学 语言学
作者
Xiaoyu Guo,Dima Atehli,Mianhua Chen,Di Chen,Yurong Wang
出处
期刊:International Journal of Biological Macromolecules [Elsevier]
卷期号:233: 123504-123504 被引量:8
标识
DOI:10.1016/j.ijbiomac.2023.123504
摘要

High-quality natural edible pigments known as monascus pigments (MPs) are widely used in food, medicine, and chemical industries as active functional ingredients. At the transcriptional level, the expression of MPs genes are tightly controlled, limiting their productivity and color value. Hitherto our understanding of the regulation of expression of MPs genes has been rather limited. Here, we describe a pathway-specific Zn(II)(2)Cys(6) transcription factor involved in the MPs biosynthetic cluster named MPsGeI, which encodes a 813-amino-acid protein with six introns. Expression of all MPs biosynthetic genes and accumulation of MPs were remarkably increased in ΔMPsGeI strain, and MPs production was significantly reduced in MPsGeI over-expressing strain. Results clearly demonstrated that MPsGeI negatively regulates MPs accumulation via transcriptional regulation of MPs biosynthetic genes, and plays a central repressive role in MPs' biosynthesis. Transcriptomic analyses revealed that MPsGeI disruptant regulated higher concentrations of precursors flowing to pigment and resulted in accumulation of a large amount of red MPs in hyphae. This work offers an efficient method for increasing MPs's productivity and color value and provides novel insights into the regulatory mechanisms of fungal cellular processes, which will assist to enhance MPs production and application.
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