Transcriptomic Insights into Caffeine Degradation Pathways in <i>Desarmillaria tabescens</i>.

ABSTRACT: Caffeine contamination threatens ecosystems and human health, with conventional remediation methods facing limitations. This study identified Desarmillaria tabescens as a potent caffeine-degrading fungus, achieving efficient degradation under optimized conditions (malt extract medium, 900 mg/L caffeine, 28 °C, pH 8). HPLC analysis revealed key intermediates such as theobromine and 3-methylxanthine, confirming a branched catabolic pathway involving N-demethylation and C8 oxidation. Transcriptomic profiling identified nine consistently upregulated cytochrome P450 genes as core catalytic components, with three adjacent to a polyketide biosynthetic gene cluster potentially supporting oxidative reactions. A three-phase "Stress-Degradation-Homeostasis" regulatory model was proposed, coord

SUBMITTER: Wang J 

PROVIDER: S-EPMC12735256 | biostudies-literature | 2025 Nov

REPOSITORIES: biostudies-literature