Abstract:
:Cordycepin, isolated from the traditional medicinal fungus Cordyceps militaris, 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 C. militaris 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 C. militaris wild type. These results provide a complete map of the cordycepin network in C. militaris with a distinct understanding of the flexibility of joints, giving a better foundation for increasing cordycepin yield and strain breeding in the future.
journal_name
Front Microbioljournal_title
Frontiers in microbiologyauthors
Chen BX,Wei T,Xue LN,Zheng QW,Ye ZW,Zou Y,Yang Y,Yun F,Guo LQ,Lin JFdoi
10.3389/fmicb.2020.00577subject
Has Abstractpub_date
2020-04-24 00:00:00pages
577issn
1664-302Xjournal_volume
11pub_type
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