Analysis of CYP450 gene expression and function in white-rot fungus, Lenzites gibbosa, treated with Congo red

We investigated the function of cytochrome P450 (CYP450) genes in degradation of the diazo dye, Congo red, by white-rot fungus Lenzites gibbosa. Hyphae treated with Congo red at different times were sequenced to obtain transcription data. CYP450 genes in transcriptomes were identified using a gene-encoding protein functional search and analyzed in Cluster of Orthologous Genes, Gene Ontology, Kyoto Encyclopedia of Genes and Genomes Databases. Differentially expressed genes (DEGs) in different groups were analyzed using EdgeR. We present the relation between transcription factors (TFs) and CYP450 regulation by analysis of the co-expression network. One hundred sixty CYP450 genes obtained by a functional annotation search were related to the oxido-reduction reaction of secondary metabolism, defense mechanism and aromatic compound degradation. The fastest decolorization and the greatest expression of CYP450 genes, which were related to the decolorization effect, occurred at 0-3 h. Seven CYP450 genes (7522, 6568, 4482, 9118, 10935, 7521 and 10926) were identified. The key TFs that regulate these genes belong to the zinc finger family. CYP450 genes and their products in L. gibbosa participated in degradation of Congo red and stress resistance. We provide a reference value for degradation and decolorization of Congo red.