Abundant and selective RNA-editing events in the medicinal mushroom Ganoderma lucidum.
RNA editing is a widespread, post-transcriptional molecular phenomenon that diversifies hereditary information across various organisms. However, little is known about genome-scale RNA editing in fungi. In this study, we screened for fungal RNA editing sites at the genomic level in Ganoderma lucidum, a valuable medicinal fungus. On the basis of our pipeline that predicted the editing sites from genomic and transcriptomic data, a total of 8906 possible RNA-editing sites were identified within the G. lucidum genome, including the exon and intron sequences and the 5'-/3'-untranslated regions of 2991 genes and the intergenic regions. The major editing types included C-to-U, A-to-G, G-to-A, and U-to-C conversions. Four putative RNA-editing enzymes were identified, including three adenosine deaminases acting on transfer RNA and a deoxycytidylate deaminase. The genes containing RNA-editing sites were functionally classified by the Kyoto Encyclopedia of Genes and Genomes enrichment and gene ontology analysis. The key functional groupings enriched for RNA-editing sites included laccase genes involved in lignin degradation, key enzymes involved in triterpenoid biosynthesis, and transcription factors. A total of 97 putative editing sites were randomly selected and validated by using PCR and Sanger sequencing. We presented an accurate and large-scale identification of RNA-editing events in G. lucidum, providing global and quantitative cataloging of RNA editing in the fungal genome. This study will shed light on the role of transcriptional plasticity in the growth and development of G. lucidum, as well as its adaptation to the environment and the regulation of valuable secondary metabolite pathways.
The National Engineering Laboratory for Breeding of Endangered Medicinal Materials, Institute of Medicinal Plant Development, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing 100193, China.
Yingjie
Y
Zhu
Hongmei
H
Luo
Xin
X
Zhang
Jingyuan
J
Song
Chao
C
Sun
Aijia
A
Ji
Jiang
J
Xu
Shilin
S
Chen
D000243:Adenosine Deaminase / Q000235:genetics / Q000378:metabolism; D003844:DCMP Deaminase / Q000235:genetics / Q000378:metabolism; D005656:Fungal Proteins / Q000235:genetics* / Q000378:metabolism; D016681:Genome, Fungal; D059014:High-Throughput Nucleotide Sequencing; D015394:Molecular Structure; D010802:Phylogeny; D017393:RNA Editing; D012331:RNA, Fungal / Q000378:metabolism*; D020940:Reishi / Q000201:enzymology / Q000235:genetics*; D015203:Reproducibility of Results
D005656:Fungal Proteins; D012331:RNA, Fungal; D003844:DCMP Deaminase; D000243:Adenosine Deaminase
Ganoderma lucidum; RNA editing; RNA-Seq