Probing the transcriptome of Aconitum carmichaelii reveals the candidate genes associated with the biosynthesis of the toxic aconitine-type C-19-diterpenoid alkaloids
文献类型: 外文期刊
作者: Zhao, Dake 1 ; Shen, Yong 4 ; Shi, Yana 5 ; Shi, Xingqiao 6 ; Qiao, Qin 6 ; Zi, Shuhui 6 ; Zhao, Erqiang 6 ; Yu, Diqiu 3 ; K 1 ;
作者机构: 1.Yunnan Univ, State Key Lab Conservat & Utilizat Bioresources, Lab Ecol & Evolutionary Biol, Kunming, Yunnan, Peoples R China
2.Yunnan Baiyao Grp Co Ltd, Yunnan Inst Mat Med, Kunming, Yunnan, Peoples R China
3.Chinese Acad Sci, Xishuangbanna Trop Bot Garden, Key Lab Trop Plant Resources & Sustainable Use, Kunming, Yunnan, Peoples R China
4.Yunnan Agr Univ, Coll Agr & Biotechnol, Kunming, Yunnan, Peoples R China
5.Yunnan Acad Agr Sci, Inst Med Plants, Kunming, Yunnan, Peoples R China
6.Yunnan Univ, Sch Agr, Kunming, Yunnan, Peoples R China
7.CUNY, Dept Biol Sci, Lehman Coll, Bronx, NY USA
8.CUNY, Grad Ctr, PhD Programs Biochem Biol & Chem, New York, NY USA
关键词: Aconitum carmichaelii (Ranunculaceae); Fuzi; Transcriptome; Biosynthesis; Aconitine-type C-19-diterpenoid alkaloids; Acute toxicity; Traditional Chinese medicine (TCM)
期刊名称:PHYTOCHEMISTRY ( 影响因子:4.072; 五年影响因子:4.132 )
ISSN: 0031-9422
年卷期: 2018 年 152 卷
页码:
收录情况: SCI
摘要: Aconitum carmichaelii has long been used as a traditional Chinese medicine, and its processed lateral roots are known commonly as fuzi. Aconitine-type C-19-diterpenoid alkaloids accumulating in the lateral roots are some of the main toxicants of this species, yet their biosynthesis remains largely unresolved. As a first step towards understanding the biosynthesis of aconitine-type C-19-diterpenoid alkaloids, we performed de novo transcriptome assembly and analysis of rootstocks and leaf tissues of Aconitum carmichaelii by next-generation sequencing. A total of 525 unigene candidates were identified as involved in the formation of C-19-diterpenoid alkaloids, including those encoding enzymes in the early steps of diterpenoid alkaloids scaffold biosynthetic pathway, such as ent-copalyl diphosphate synthases, entkaurene synthases, kaurene oxidases, cyclases, and key aminotransferases. Furthermore, candidates responsible for decorating of diterpenoid alkaloid skeletons were discovered from transcriptome sequencing of fuzi, such as monooxygenases, methyltransferase, and BAHD acyltransferases. In addition, 645 differentially expressed genes encoding transcription factors potentially related to diterpenoid alkaloids accumulation underground were documented. Subsequent modular domain structure phylogenetics and differential expression analysis led to the identification of BAHD acyltransferases possibly involved in the formation of acetyl and benzoyl esters of diterpenoid alkaloids, associated with the acute toxicity of fuzi. The transcriptome data provide the foundation for future research into the molecular basis for aconitine-type C-19-diterpenoid alkaloids biosynthesis in A. carmichaelii. (C) 2018 Published by Elsevier Ltd.
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