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ABSTRACT: Taxus × media RNA-Seq DGE Data

PROVIDER: PRJNA436823 | ENA |

REPOSITORIES: ENA

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Dataset's files

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			Action	DRS
	SRR6803200.fastq.gz	Fastqsanger.gz
	SRR6804110.fastq.gz	Fastqsanger.gz
	SRR6803201.fastq.gz	Fastqsanger.gz
	SRR6803202.fastq.gz	Fastqsanger.gz
	SRR6803203.fastq.gz	Fastqsanger.gz

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Project description:DGE data of Taxus × media RNA-Seq

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Project description:Taxus × media RNA-Seq Transcriptome Data

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Variations in the expression pattern and sequence similarity of the key genes involved in the metabolism of taxoids among three Taxus species

Project description:Background：Taxol is an efficient anticancer drug; however, the accumulation of taxoids can vary hugely among Taxus species. The mechanism underlying differential accumulation of taxoids are largely unknown. Thus, the comparative analysis of the transcriptomes in three Taxus species, including T. media, T. mairei and T. cuspidata, was performed. Results:KEGG enrichment analysis revealed that the diterpenoid biosynthesis and cytochrome P450 pathways were significantly enriched in the differential expressed genes. Dynamic expressions of the taxol biosynthesis related genes might be a potential explanation for the interspecific differential accumulation of taxol and its derivatives. Besides, the sequences of several key enzymes were re-assembled based on independent transcriptomes from different Taxus species. Our data showed that sequence diversity may be another factor that determines the variations in taxoids. Furthermore, five jasmonic acid (JA) metabolism-related GO terms were analyzed. The differential expression of these JA-related transcription factors suggested distinct responses to exogenous MeJA applications in the three Taxus species. Conclusions:Our results revealed the comprehensive variations in the expression pattern and sequence similarity of the key genes involved in the metabolism of taxoids among different Taxus species. The data give us an opportunity to reveal the mechanism underlying the variations in the taxoid contents and to select the highest-yielding Taxus species.

2018-10-20 | GSE121523 | GEO

Project description:RNA-Seq of the roots of Taxus media

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Analysis of sexually dimorphic accumulation of taxoids identifies a female-specific MYB-bHLH complex involved in the paclitaxel biosynthesis of Taxus media

Project description:Taxol is an efficient anticancer drug accumulated in Taxus trees. Taxus media, a large-scale cultured species, is a dioecious woody tree with high taxol yielding. However, the sexually dimorphic accumulation of taxoids in T. media is largely unknown. Our study identified a large number of differentially accumulated metabolites and differentially expressed genes, revealing the comprehensive differences between the female and male T. media trees. LC-MS analysis confirmed the high accumulation of taxoids in the female trees. Expression analysis showed that most Taxol biosynthesis-related genes were predominantly expressed in the female trees. To investigate the regulation mechanism underlying the sexually dimorphic accumulation of taxoids, a female-specific expressed gene, TmMYB39, was identified and its full-length sequence was cloned. Multiple sequence alignment and phylogenetic analyses showed that TmMYB39 is a typical R2R3-MYB factor and the subcellular localization of TmMYB39 is shown to be the nucleus. Furthermore, Y2H and BiFC assays showed that TmMYB39 interacts with TmbHLH13. Partial promoter sequences of 10 taxol biosynthesis-related genes were isolated, which were used for screening of the MYB recognition elements. TmMYB39 binds to the promoters of several taxol-related genes, such as GGPPS, T7OH, T10OH, T13OH, and TBT genes. Interaction between TmMYB39 and TmbHLH13 affected the expression of GGPS and T10OH genes, suggesting that TmMYB39 might function in the regulation of taxol biosynthesis through a ‘MYB-bHLH’ module. Our data provided a potential explanation for the sexually dimorphic accumulation of taxoids.

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Project description:Transcriptome sequencing of taxus media leaves

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Project description:Taxus cuspidata RNA-Seq analysis

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