Transcriptome Analysis Reveals the Flexibility of Cordycepin Network in Cordyceps militaris Activated by L-Alanine Addition

Cordycepin, isolated from the traditional medicinal fungus , has gained much attention due to its various clinical functions. Previous reports of L-alanine addition could significantly improve cordycepin production, but the molecular mechanism remains unknown. In this study, transcriptome analysis o...

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Published inFrontiers in microbiology Vol. 11; p. 577
Main Authors Chen, Bai-Xiong, Wei, Tao, Xue, Ling-Na, Zheng, Qian-Wang, Ye, Zhi-Wei, Zou, Yuan, Yang, Yi, Yun, Fan, Guo, Li-Qiong, Lin, Jun-Fang
Format Journal Article
LanguageEnglish
Published Switzerland Frontiers Media S.A 24.04.2020
Subjects
cordycepin
Cordyceps militaris
flexibility
metabolic network
Microbiology
transcription factor
transcription factor
flexibility
Cordyceps militaris
cordycepin
metabolic network
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Summary:Cordycepin, isolated from the traditional medicinal fungus , has gained much attention due to its various clinical functions. Previous reports of L-alanine addition could significantly improve cordycepin production, but the molecular mechanism remains unknown. In this study, transcriptome analysis of with doubled cordycepin production induced by L-alanine addition provides an insight into the flexibility of the cordycepin network. The biopathways of energy generation and amino acid conversion were activated so that cordycepin substrate generation was consequently improved. Specific genes of rate-limiting enzymes in these pathways, as well as related transcription factors, were figured out. Two key Zn2Cys6-type transcription factors CmTf1 and CmTf2 were verified to play the roles of doubling the cordycepin production by overexpression of their coding genes in wild type. These results provide a complete map of the cordycepin network in with a distinct understanding of the flexibility of joints, giving a better foundation for increasing cordycepin yield and strain breeding in the future.
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Reviewed by: Yulong Wang, Anhui Agricultural University, China; Xingzhong Liu, Institute of Microbiology (CAS), China
Edited by: Gustavo Henrique Goldman, University of São Paulo, Brazil
These authors have contributed equally to this work
This article was submitted to Fungi and Their Interactions, a section of the journal Frontiers in Microbiology
ISSN:1664-302X
1664-302X
DOI:10.3389/fmicb.2020.00577