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  • Title: Alternative metabolic routes in channeling xylose to cordycepin production of Cordyceps militaris identified by comparative transcriptome analysis.
    Author: Wongsa B, Raethong N, Chumnanpuen P, Wong-Ekkabut J, Laoteng K, Vongsangnak W.
    Journal: Genomics; 2020 Jan; 112(1):629-636. PubMed ID: 31022437.
    Abstract:
    The responsive mechanism of C. militaris TBRC7358 on xylose utilization was investigated by comparative analysis of transcriptomes, growth kinetics and cordycepin productions. The result showed that the culture grown on xylose exhibited high production yield of cordycepin on dry biomass. Comparing xylose to other carbon sources, a set of significantly up-regulated genes in xylose were enriched in pentose and glucuronate interconversion, and cordycepin biosynthesis. After validating up-regulated genes using quantitative real-time PCR, interestingly, putative alternative 3'-AMP-associated metabolic route on cordycepin biosynthesis was identified. Through reporter metabolites analysis of C. militaris, significant metabolites (e.g., AMP, glycine and L-glutamate) were identified guiding involvement of growth and cordycepin production. These findings suggested that there was a cooperative mechanism in transcriptional control of the supplying precursors pool directed towards the cordycepin biosynthesis through main and putative alternative metabolic routes for leverage of cell growth and cordycepin production on xylose of C. militaris strain TBRC7358.
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