Chromosome-Scale Genome and Transcriptomic Analyses Reveal Differential Regulation of Terpenoid Secondary Metabolites in Hericium coralloides
- Author: mycolabadmin
- 10/9/2024
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Summary
Researchers sequenced the complete genome of Hericium coralloides, an edible medicinal mushroom, at the chromosome level for the first time. They identified genes responsible for producing terpenoids, which are beneficial compounds with antioxidant, anti-inflammatory, and anti-tumor properties. The study found that these beneficial compounds are produced in higher amounts in the mushroom’s mycelium (root-like structure) compared to fruiting bodies, which could help optimize mushroom cultivation for medicinal use.
Background
Hericium coralloides is an edible and medicinal mushroom containing complex chemical compositions including erinacines, phenols, and steroids with various biological activities. Previous genome assemblies of H. coralloides lacked chromosome-scale resolution, limiting understanding of terpenoid biosynthesis genes.
Objective
To construct a high-quality chromosome-scale genome of H. coralloides using PacBio HiFi sequencing and Hi-C technology, and to identify genes involved in terpenoid biosynthesis through transcriptomic analysis.
Results
A 43.7 Mb genome with 13 chromosomes and 11,690 predicted genes was assembled with 96.9% BUSCO integrity. Key terpenoid biosynthesis genes were identified including Her011461 and Her008335 encoding geranylgeranyl pyrophosphate and farnesyl diphosphate synthases. Most terpenoid-related genes showed higher expression in dikaryotic mycelia compared to fruiting bodies, suggesting higher terpenoid abundance in mycelial stages.
Conclusion
This study provides the first chromosome-scale genome assembly of H. coralloides and identifies genes critical for terpenoid biosynthesis. The differential expression patterns suggest that terpenoid production is tissue-specific, with higher levels in dikaryotic mycelia, providing insights for optimizing H. coralloides cultivation and bioactive compound production.
- Published in:Journal of Fungi (Basel),
- Study Type:Genomic and Transcriptomic Analysis,
- Source: PMC11508549, PMID: 39452656