Browse
Submit Data
Databases
API
Help

Dataset Information

0 Views

0 Connections

0 Citations

0 Reanalyses

0 Downloads

Omics score: 0

COSY catalyzes trans-cis isomerization and lactonization in the biosynthesis of coumarins

ABSTRACT:

Coumarins or 1,2-benzopyrones comprise a large class of secondary metabolites ubiquitously found in the plant kingdom. In many plant species, coumarins are particularly important for iron acquisition and plant defense. Here we show that COUMARIN SYNTHASE (COSY) is a key enzyme in the biosynthesis of coumarins. Arabidopsis thaliana cosy mutants are strongly reduced in coumarin levels and accumulate o-hydroxyphenylpropanoids instead. Accordingly, cosy mutants have reduced iron content and show growth defects when grown under conditions where iron availability is limited. Recombinant COSY is able to produce umbelliferone, esculetin and scopoletin from their respective o-hydroxycinnamoyl-CoA thioesters via two reaction steps: a trans-cis isomerization followed by a lactonization. This conversion happens partially spontaneously and is catalyzed by light, which explains why the need for an enzyme for this conversion has been overlooked. The combined results show that COSY has an essential role in the biosynthesis of coumarins in organs that are shielded from light, such as roots. These findings provide routes to improving coumarin production in crops or via microbial fermentation.

INSTRUMENT(S): Liquid Chromatography MS - Negative (LC-MS (Negative))

PROVIDER: MTBLS692 | MetaboLights | 2019-08-08

REPOSITORIES: MetaboLights

ACCESS DATA

Json Xml

Dataset's files

Source:

			Action	DRS
	WT_nossen_ROOT_1.mzML	Mzml
	WT_nossen_ROOT_2.mzML	Mzml
	WT_nossen_ROOT_3.mzML	Mzml
	WT_nossen_ROOT_4.mzML	Mzml
	WT_nossen_ROOT_5.mzML	Mzml

Items per page:

1 - 5 of 59

Similar Datasets

Microbe-enhanced high light stress tolerance of Arabidopsis thaliana photosynthesis is coordinated through Iron-dependent redox metabolism

Project description:High light stress in subtropical and tropical regions strongly limits agricultural production due to photo-oxidative damage, decreased growth and yield. Here, we investigated whether beneficial microbes can protect plants under high light stress. We show that Enterobacter sp. SA187 (SA187) assists Arabidopsis in maintaining growth under high light stress, reducing the accumulation of reactive oxygen species (ROS) and maintaining photosynthesis. Under high light stress, SA187 induces dynamic transcriptional changes related to a fortified iron metabolism and redox system in Arabidopsis. A genetic analysis shows that SA187-induced plant high light stress tolerance is mediated by ethylene signaling via the transcription factor EIN3 to enhance iron metabolism. In summary, we show that Arabidopsis interaction with SA187 results in sustained photosynthesis under high light stress suggesting that beneficial microbes could be effective and cheap means for enhancing high light stress tolerance in crops.

2024-12-05 | GSE251796 | GEO

Expression profiling of Ruminococcus flavefaciens FD-1 with growth on cellulose or cellobiose

Project description:This study compares growth of Ruminococcus flavefaciens FD-1 with cellulose or cellobiose as the carbohydrate substrate. Ruminococcus flavefaciens is a predominant cellulolytic rumen bacterium, which forms a multi-enzyme cellulosome complex that could play an integral role in the ability of this bacterium to degrade plant cell wall polysaccharides. Identifying the major enzyme types involved in plant cell wall degradation is essential for gaining a better understanding of the cellulolytic capabilities of this organism as well as highlighting potential enzymes for application to improvement of livestock nutrition and for conversion of cellulosic biomass to liquid fuels. These results show that the growth substrate drives expression of enzymes predicted to be involved in carbohydrate metabolism as well as expression and assembly of key cellulosomal enzyme components. 1 species (Ruminococcus flavefaciens FD_1), 2 conditions (cellulose, cellobiose), 4 biological replicates. Direct design with biological dye swap.

2010-05-16 | E-GEOD-15916 | biostudies-arrayexpress

Expression profiling of Ruminococcus flavefaciens FD-1 with growth on cellulose or cellobiose

2009-06-29 | GSE15916 | GEO

Toxicogenomics on mice liver of coumarins from Calophyllum brasiliense

2015-09-06 | GSE72755 | GEO

The Role of Microbe-Enhanced Iron-Dependent Redox Metabolism in optimizing photosynthesis under high light stress in Arabidopsis

Project description:High light stress in subtropical and tropical regions strongly limits agricultural production due to photo-oxidative damage, decreased growth and yield. Here, we investigated whether beneficial microbes can protect plants under high light stress. We show that Enterobacter sp. SA187 (SA187) assists Arabidopsis in maintaining growth under high light stress, reducing the accumulation of reactive oxygen species (ROS) and maintaining photosynthesis. Under high light stress, SA187 induces dynamic transcriptional changes related to a fortified iron metabolism and redox system in Arabidopsis. A genetic analysis shows that SA187-induced plant high light stress tolerance is mediated by ethylene signaling via the transcription factor EIN3 to enhance iron metabolism. In summary, we show that Arabidopsis interaction with SA187 results in sustained photosynthesis under high light stress suggesting that beneficial microbes could be an effective and inexpensive means for enhancing high light stress tolerance in crops.

2025-05-06 | PXD047231 | Pride

Toxicogenomics on mice liver of coumarins from Calophyllum brasiliense

Project description:A toxicogenomic analysis from liver of different pharmacological active coumarins (mammea A/BA+A/BB 3:1 and soulatrolide ) was performed on mice treated (20mg/kg/daily) for a whole week to evaluate if such compounds possess or could develop a hazardous profile on liver. In this dataset, we include the expression data obtained from dissected liver mouse treated with active coumarins (obtained from Calophyllum brasiliense) and control (SSI) for a whole week. Livers from 4 animals per treatment and control were subjected to RNA extraction. These data showed 46 genes up and 72 downregulated genes for mammea coumarins and 665 up and 1077 downregulated genes . Expression data from liver of mice treated with different coumarins (mammea and soulatrolide) from Calophyllum brasiliense 12 Total samples were analyzed. Liver from 4 animals per treatment groups were subjected to mRNA expression analysis. We generated the statistical computing and metrics in the arrayQualityMetrics data were normalized with RMA method and differential expressed genes obtained with Ingenuity Software. Genes with an FDRâ¤10% and a fold-change â¥2 were selected.

2015-09-06 | E-GEOD-72755 | biostudies-arrayexpress

Tungsten is Utilized for Lactate Consumption and SCFA Production by a Dominant Human Gut Microbe Eubacterium limosum

Project description:Eubacterium limosum is a dominant member of the human gut microbiome and produces short-chain fatty acids (SCFAs). These promote immune system function and inhibit inflammation, making this microbe important for human health. Lactate is a primary source of gut SCFAs but its utilization by E. limosum has not been explored. We show that E. limosum growing on lactate takes up added tungstate rather than molybdate and produces the SCFAs acetate and butyrate, but not propionate. The genes encoding an electron bifurcating, tungsten-containing oxidoreductase (WOR1) and a tungsten-containing formate dehydrogenase (FDH), along with an electron bifurcating lactate dehydrogenase (LCT), lactate permease and enzymes of the propanediol pathway, are all up-regulated on lactate compared to growth on glucose. Lactate metabolism is controlled by a GntR-family repressor (LctR) and two global regulators, Rex and CcpA, where Rex in part controls W storage and tungstopyranopterin (Tuco) biosynthesis. Tuco-dependent riboswitches, along with CcpA, also control two iron transporters, consistent with the increased iron demand for many iron-containing enzymes, including WOR1 and FDH, involved in SCFA production. From intracellular aldehyde concentrations and the substrate specificity of WOR1, we propose that WOR1 is involved in detoxifying acetaldehyde produced during lactate degradation. Lactate to SCFA conversion by E. limosum is clearly highly tungstocentric and tungsten might be an overlooked micronutrient in the human microbiome and in overall human health.

2025-11-06 | GSE281261 | GEO

Pexophagy suppresses ROS-induced damage in leaf cells under high-intensity light

Project description:Although light is essential for photosynthesis, it has the potential to elevate intracellular levels of reactive oxygen species (ROS). Since high ROS levels are cytotoxic, plants must alleviate such damage. However, the cellular mechanism underlying ROS-induced leaf damage alleviation in peroxisomes was not fully explored. Here, we show that autophagy plays a pivotal role in the selective removal of ROS-generating peroxisomes, which protects plants from oxidative damage during photosynthesis. We present that autophagy-deficient mutants show light intensity-dependent leaf damage and excess aggregation of ROS-accumulating peroxisomes. The peroxisome aggregates are specifically engulfed by pre-autophagosomal structures and vacuolar membranes in both leaf cells and isolated vacuoles, but they are not degraded in mutants. ATG18a-GFP and GFP-2×FYVE, which bind to phosphatidylinositol 3-phosphate, preferentially target the peroxisomal membranes and pre-autophagosomal structures near peroxisomes in ROS-accumulating cells under high-intensity light. Our findings provide deeper insights into the plant stress response caused by light irradiation.

2023-02-27 | PXD038480 | Pride

Uracil phosphoribosyltransferase is required to establish a functional cytochrome b6/f complex

Project description:Arabidopsis uracil phosphoribosyltransferase (UPP) is an essential enzyme and plants lacking this enzyme are strongly compromised in chloroplast function. Our analysis of UPP amiRNA mutants has confirmed that this vital function is crucial to establish a fully functional photosynthesis as the RIESKE iron sulfur protein (PetC) is almost absent, leading to a block in photosynthetic electron transport. Interestingly, this function appears to be unrelated to nucleotide homeostasis since nucleotide levels were not altered in the studied mutants. Transcriptomics and proteomic analysis showed that protein homeostasis but not gene expression is most likely responsible for this observation and high light provoked an upregulation of protease levels, including thylakoid filamentation temperature-sensitive 1, 5 (FtsH), caseinolytic protease proteolytic subunit 1 (ClpP1), and processing peptidases, as well as components of the chloroplast protein import machinery in UPP amiRNA lines. Strongly reduced PetC amounts were not only detected by immunoblot from mature plants but in addition in a de-etiolation experiment with young seedlings and are causing reduced high light-induced non-photochemical quenching Φ(NPQ) but increased unregulated energy dissipation Φ(NO). This impaired photosynthesis results in an inability to induce flavonoid biosynthesis. In addition, the levels of the osmoprotectants raffinose, proline, and fumarate were found to be reduced. In sum, our work suggests that UPP assists in stabilization PetC during import, processing or targeting to the thylakoid membrane, or protects it against proteolytic degradation.

2024-05-31 | GSE268410 | GEO

Uracil phosphoribosyltransferase is required to establish a functional cytochrome b6/f complex

Project description:Arabidopsis uracil phosphoribosyltransferase (UPP) is an essential enzyme and plants lacking this enzyme are strongly compromised in chloroplast function. Our analysis of UPP amiRNA mutants has confirmed that this vital function is crucial to establish a fully functional photosynthesis as the RIESKE iron sulfur protein (PetC) is almost absent, leading to a block in photosynthetic electron transport. Interestingly, this function appears to be unrelated to nucleotide homeostasis since nucleotide levels were not altered in the studied mutants. Transcriptomics and proteomic analysis showed that protein homeostasis but not gene expression is most likely responsible for this observation and high light (HL) provoked an upregulation of protease levels, including thylakoid filamentation temperature-sensitive 1, 5 (FtsH), caseinolytic protease proteolytic subunit 1 (ClpP1), and processing peptidases, as well as components of the chloroplast protein import machinery in UPP amiRNA lines. Strongly reduced PetC amounts were not only detected by immunoblot from mature plants but in addition in de-etiolation experiment with young seedlings and are causing reduced high light-induced non-photochemical quenching (NPQ) but increased unregulated energy dissipation (NO). Our work suggests that UPP assists in stabilization PetC during the assembly of the Fe-S cluster and targeting to the thylakoid or protects it against proteolytic degradation.

2024-12-09 | PXD052789 | Pride

OmicsDI is part of the ELIXIR infrastructure

OmicsDI is an Elixir interoperability service. Learn more ›

Tweets

OmicsDI Databases

PRIDE
PeptideAtlas
MassIVE
JPOST Repository
Physiome Model Repository

EGA
EVA
ENA
LINCS
PAXDB
Cell Collective

MetaboLights
Metabolomics Workbench
MetabolomeExpress
GNPS
BioModels
FAIRDOMHub

ArrayExpress
dbGaP
ExpressionAtlas
GEO
NODE

Information

Databases
Help
API
Contact us
Code on GitHub
Terms of use
Submit Data