Genome-wide identification of CYP450 in Ganoderma lucidum and expression analysis of genes related to ganoderic acid synthesis.

The biosynthesis mechanism of ganoderic acid, a class of secondary metabolites of Ganoderma lucidum, is currently unknown. Members of G. lucidum's CYP450 gene family were found in this study by genome-wide analysis. Determination of ganoderic acid content in Jilin, Zhejiang, Jinzhai, Fujian, Yunnan and Shandong regions was performed using high performance liquid chromatography. Expression of CYP450 gene of G. lucidum from Jilin, Jinzhai and Shandong origins was analyzed by transcriptome sequencing. The findings indicated that, through comprehensive sequence analysis and functional annotation, 189 CYP450 genes were detected in the G. lucidum genome, among which 34 CYP450 genes were significantly differentially expressed in transcriptome analysis, and the gene expression was positively correlated with ganoderic acid content. Bioinformatics analysis predicted the conserved motifs, structural features, and subcellular localization of 189 CYP genes, revealing significant differences in gene structure and protein motif composition among GlCYP450 family members. Subcellular localization revealed that they are located in the plasma membrane, cytoplasm, nucleus, mitochondria, peroxisome, endoplasmic reticulum, extracellular space, and cytoskeleton, suggesting that they have multiple functions. A number of cis-regulatory elements associated with stress responses and phytohormones were identified in the promoter regions of these genes. It demonstrates that ganoderic acid production has been significantly controlled by these P450 genes. These findings offer a crucial theoretical foundation for a thorough comprehension of the process of ganoderic acid production, the bioinformatics role of CYP450 genes in G. lucidum, and the selection and breeding of superior G. lucidum resources.