每年出版 12 期
ISSN 打印: 1521-9437
ISSN 在线: 1940-4344
Indexed in
The Cloning, Characterization, and Functional Analysis of a Gene Encoding an Isopentenyl Diphosphate Isomerase Involved in Triterpene Biosynthesis in the Lingzhi or Reishi Medicinal Mushroom Ganoderma lucidum (Higher Basidiomycetes)
摘要
An isopentenyl diphosphate isomerase (IDI) gene, GlIDI, was isolated from Ganoderma lucidum, which produces triterpenes through the mevalonate pathway. The open reading frame of GlIDI encodes a 252 amino acid polypeptide with a theoretical molecular mass of 28.71 kDa and a theoretical isoelectric point of 5.36. GlIDI is highly homologous to other fungal IDIs and contains conserved active residues and nudix motifs shared by the IDI protein family. The color complementation assay indicated that GlIDI can accelerate the accumulation of β-carotene and confirmed that the cloned complementary DNA encoded a functional GlIDI protein. Gene expression analysis showed that the GlIDI transcription level was relatively low in the mycelia and reached a relatively high level in the mushroom primordia. In addition, its expression level could be up-regulated by 254 µM methyl jasmonate. Our results suggest that this enzyme may play an important role in triterpene biosynthesis.
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