The comparative transcriptome analysis of the fungus Gibberella zeae which could efficiently catalyze the 7β-hydroxylation of LCA to produce UDCA was performed with LCA induction. This is the first time to report the comparative transcriptome of fungus under LCA treatment. Totally, 1364 differentially expressed genes including 770 up-regulated and 594 down-regulated genes were identified. In the 770 up-regulated genes, 12 genes with the function of hydroxylation were picked out by application of function screening, which were annotated as CYP450 or hydroxylase. Moreover, the qRT-PCR results of five up-regulated CYP450-like genes confirmed the credibility of RNA-Seq further. These results provide valuable information for the discovery of novel enzyme producing clinical drug UDCA from butchery byproduct LCA, and also might indicate some clues for the detoxification process of LCA in humans.
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