Transcriptome sequencing analysis of the MSDIN gene family encoding cyclic peptides in lethal Amanita fuligineoides
文献类型： 外文期刊
作者： He, Yong 1 ; Zhang, Cheng-hua 1 ; Deng, Wang-qiu 1 ; Zhou, Xiao-yun 2 ; Li, Tai-hui 1 ; Li, Chuan-hua 3 ;
作者机构： 1.Guangdong Acad Sci, Guangdong Inst Microbiol, State Key Lab Appl Microbiol Southern China, Guangdong Open Lab Appl Microbiol,Guangdong Prov, Guangzhou 510070, Peoples R China
2.Hunan Agr Univ, Coll Biosci & Biotechnol, Changsha 410128, Peoples R China
3.Shanghai Acad Agr Sci, Inst Edible Fungi, Shanghai 201403, Peoples R China
关键词： Lethal Amanita; Core peptide; Phylogenetic tree; MSDIN gene Family
期刊名称：TOXICON （ 影响因子：3.033； 五年影响因子：2.689 ）
ISSN： 0041-0101
年卷期： 2020 年 183 卷
页码：
收录情况： SCI
摘要： Amanita fuligineoides, a lethal mushroom discovered in China, contains abundant cyclic peptide toxins that can cause fatal poisoning. However, the MSDIN gene family encoding for these cyclic peptides in A. fuligineoides has not been systematically studied. In this research, the transcriptome sequencing of A. fuligineoides was performed and its MSDIN family members were analyzed. A total of 4.41 Gb data containing 30833 unigenes was obtained; sequence alignments throughout several databases were done to obtain their functional annotations. Based on these annotations, MSDIN genes were found and verified by RT-PCR. A total of 29 different core peptides were obtained: 3 toxin genes, encoding beta-amanitin (beta-AMA), phalloidin (PHD), and phallacidin (PCD), and 26 genes encoding unknown cyclic peptides, 20 of which are reported for the first time and may encode for novel cyclic peptides. Analysis of the predicted precursor peptides indicated that octocyclic peptides were the main MSDIN peptides synthesized by A. fuligineoides, accounting for the 45%. A phylogenetic analysis suggested that studied precursor peptides could be clustered into 7 clades, which might represent different functionalities. Results suggested that A. fuligineoides might have a strong capacity to synthesize cyclopeptides, laying the foundation for their excavation and utilization.
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