Alstonia scholaris
Ontology highlight
ABSTRACT:
PROVIDER: PRJNA1008869 | ENA |
REPOSITORIES: ENA
Dataset's files
| Action | DRS | |||
|---|---|---|---|---|
| SRR25773640_1.fastq.gz | Fastqsanger.gz | |||
| SRR25773640_2.fastq.gz | Fastqsanger.gz | |||
| SRR25773641_1.fastq.gz | Fastqsanger.gz | |||
| SRR25773641_2.fastq.gz | Fastqsanger.gz | |||
| SRR25773642_1.fastq.gz | Fastqsanger.gz |
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Project description:Monoterpene indole alkaloids (MIAs) are a diverse family of complex plant secondary metabolites with many medicinal properties, including the essential anti-cancer therapeutics vinblastine and vincristine. As MIAs are difficult to chemically synthesize, the world’s supply chain for vinblastine relies on low-yielding extractions of precursors vindoline and catharanthine from the plant Catharanthus roseus, followed by chemical coupling and reduction to form vinblastine. Here, we demonstrate de novo microbial biosynthesis of vindoline and catharanthine from renewable feedstocks such as simple sugar and amino acids using highly engineered yeast. The study showcases the longest biosynthetic pathway refactored into a microbial cell factory to date, including 29 enzymatic steps from the yeast native metabolite geranyl pyrophosphate to catharanthine and vindoline. We made 44 genetic edits to yeast that include expression of 35 heterologous genes from plants as well as deletions, knock-downs, and overexpression of 10 yeast genes or variants thereof to improve the precursor supply. Finally, we demonstrate one-step in vitro vinblastine production using chemical coupling and reduction of vindoline and catharanthine. Not only is the yeast a scalable platform for production of vinblastine, it is also a platform for production of more than 2,000 different natural and new-to-nature MIAs.
2022-08-21 | PXD025067 | Pride
Project description:Monoterpene indole alkaloids (MIAs) are a diverse family of complex plant secondary metabolites with many medicinal properties, including the essential anti-cancer therapeutics vinblastine and vincristine. As MIAs are difficult to chemically synthesize, the world’s supply chain for vinblastine relies on low-yielding extractions of precursors vindoline and catharanthine from the plant Catharanthus roseus, followed by chemical coupling and reduction to form vinblastine. Here, we demonstrate de novo microbial biosynthesis of vindoline and catharanthine from renewable feedstocks such as simple sugar and amino acids using highly engineered yeast. The study showcases the longest biosynthetic pathway refactored into a microbial cell factory to date, including 29 enzymatic steps from the yeast native metabolite geranyl pyrophosphate to catharanthine and vindoline. We made 44 genetic edits to yeast that include expression of 35 heterologous genes from plants as well as deletions, knock-downs, and overexpression of 10 yeast genes or variants thereof to improve the precursor supply. Finally, we demonstrate one-step in vitro vinblastine production using chemical coupling and reduction of vindoline and catharanthine. Not only is the yeast a scalable platform for production of vinblastine, it is also a platform for production of more than 2,000 different natural and new-to-nature MIAs.
2022-09-09 | PXD024976 | panorama
Project description:Catharanthus roseus produces a variety of indole alkaloids with significant biological activities. The indole alkaloids including catharanthine, vindolinine, ajmalicine and the precursor strictosidine were dramatically induced in the leaves following binary stress. To profile the modification of indole alkaloids in C. roseus seedlings under the binary stress of ultraviolet-B irradiation and dark incubation, gel-free proteomic analysis was carried out to uncover the underlying molecular mechanism.
2015-08-24 | PXD001937 | Pride
Project description:Background: Dendrobium officinale, an endangered Chinese herb, has extensive therapeutic effects and contains bioactive ingredients including a large number of polysaccharides and alkaloids, and minimal flavonoids. Firstly, this study attempts to obtain the protocorm-like bodies of this plant through tissue culture to produce the main secondary metabolites whose distribution in each organelle and protocorm like bodies is analyzed. Then, analysis of the correlation between comparative transcriptome sequence and the metabolite content in different organs enables the discovery of putative genes encoding enzymes involved in the biosynthesis of polysaccharides and alkaloids, and flavonoids. Results: The optimum condition for protocorm-like bodies (PLBs) induction and propagation of D. officinale is established. For protocorm induction, we use the seed as the explant, and the optimum medium formula for PLBs propagation is 1/2 MS + α-NAA 0.5 mg·L-1 +6-BA 1.0 mg·L-1 + 2, 4-D 1.5-2.0 mg·L-1 + potato juice 100 g·L-1. The distribution of polysaccharides, alkaloids and flavonoids in D. officinale organs was clarified. Stems, PLBs and leaves have the highest content of polysaccharides, alkaloids and flavonoids, respectively. PLBs replace organs to produce alkaloids in D. officinale, and naringenin was only produced in stem. Hot water extraction (HWE) method was found outperforming the ultrasound-assisted extraction (UAE) method for polysaccharides from D. officinale. A comparative transcriptome analysis of the protocorm-like bodies and leaves of D. officinale showed genes encoding enzymes involved in polysaccharides, alkaloids and flavonoids biosynthetic pathway were differentially expressed. Putative genes encoding enzymes involved in polysaccharides, alkaloids and flavonoids synthetic pathway were identified. Notably, genes encoding enzymes of strictosidine beta-glucosidase, geissoschizine synthase and vinorine synthase in alkaloids biosynthesis of D. officinale are first reported. Conclusions: Our works, especially the identification of candidate genes encoding enzymes involved in metabolites biosynthesis will help to explore and protect the endangered genetic resources and will also facilitate further analysis of the molecular mechanism of secondary metabolites’ biosynthesis in D. officinale.
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2021-01-31 | ST001677 | MetabolomicsWorkbench
Project description:In plants, fatty acids are de novo synthesized predominantly in plastids fromacetyl-CoA. Although fatty acid biosynthesis has been biochemically well-studied, little isknown about the regulatory mechanisms of the pathway. Here, we show that overexpressionof the Arabidopsis (Arabidopsis thaliana) LEAFY COTYLEDON1 (LEC1) gene causesglobally increased expression of fatty acid biosynthetic genes, which are involved in keyreactions of condensation, chain elongation and desaturation of fatty acid biosynthesis. Inthe plastidial fatty acid synthetic pathway, over 58% of known enzyme-coding genes areupregulated in LEC1-overexpressing transgenic plants, including those encoding threesubunits of acetyl-CoA carboxylase, a key enzyme controlling the fatty acid biosynthesisflux. Moreover, genes involved in glycolysis and lipid accumulation are also upregulated.Consistent with these results, levels of major fatty acid species and lipids were substantiallyincreased in the transgenic plants. Genetic analysis indicates that the LEC1 function ispartially dependent on ABSCISIC ACID INSENSITIVE3, FUSCA3 and WRINKLED1 in theregulation of fatty acid biosynthesis. Moreover, a similar phenotype was observed intransgenic Arabidopsis plants overexpressing two LEC1-like genes of Brassica napus.These results suggest that LEC1 and LEC1-like genes act as key regulators to coordinate theexpression of fatty acid biosynthetic genes, thereby representing a promising target forgenetic improvement of oil-production plants.
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Project description:Daphniphyllum macropodum produces alkaloids that are structurally complex with polycyclic, stereochemically rich carbon skeletons. Understanding these compounds are formed by the plant may enable exploration of their biological function and bioactivities.We employed multiple metabolomics techniques, including a workflow to annotate compounds in the absence of standards, to compare alkaloid content across plants and tissues. Different alkaloid structural types were found to have distinct distributions between genotypes, between tissues and within tissues. Alkaloid structural types also showed different isotope labelling enrichments that matched their biosynthetic relationships. The work suggests that mevalonate derived 30-carbon alkaloids are formed in the phloem region prior to their conversion to 22-carbon alkaloids which accumulate in the epidermis, and sets the stage for further investigation into the biosynthetic pathway.
2024-01-25 | MSV000093919 | MassIVE
Project description:In this study, we have performed Illumina based RNA sequencing to characterize the transcriptome and expression profiles of genes expressed in 4 tissues of A. carmichaelii. RNA sequencing and de novo transcriptome assembly fo A. carmichaelii resulted in a total of 128,183 unigenes with 56,928 unigenes being annotated using NCBI-nr database. Transcriptome profile and analysis for 4 tissues of A. carmichaelii showed that unigenes annotated as possible rate-determining steps of aconitine-type biosynthetic pathway were highly expressed in the root.
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