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Identification and characterization of bacterial effectors that interfere with Transcriptional Gene Silencing in Arabidopsis

Objective

Transcriptional gene silencing (TGS) is an ancestral gene regulatory mechanism that operates at the level of chromatin and that involves various histone modifications as well as cytosine DNA methylation. In both plants and animals, DNA methylation transcriptionally silences transposable elements (TEs), repeats, as well as some protein-coding genes that carry TEs/repeats in their vicinity. Whereas DNA methylation has been extensively studied at particular stages of plants and animals development, its dynamics and biological relevance in response to biotic stresses, and particularly during bacterial infections, has just started to be examined and reported. Previous work from the host laboratory has revealed that disease-related genes are negatively regulated by DNA methylation and that DNA demethylation is required to enable proper plant innate immune response. Together, these results suggest that some yet-unknown bacterial virulence factors must have evolved to interfere with TGS to enable disease. The proposed project aims at identifying and characterizing such bacterial effectors as well as their interactants, namely epigenetic factors. To address these questions, the bacterial pathogen Pseudomonas syringae and the plant Arabidopsis thaliana will be used as model systems and biochemical, genetic, epigenomic and cell biology approaches combined. The proposed project sets the grounds for further mechanistic analyses of the effector-target complexes that will shed light on the precise mode of action of these epigenetic effectors and their targets. This study will not only unveil novel mechanisms of bacterial pathogenicity but also allow the identification of novel silencing factors and therefore enhance our fundamental knowledge of TGS mechanisms in plants and possibly other eukaryotic organisms.

Fields of science (EuroSciVoc)

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Programme(s)

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Topic(s)

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Funding Scheme

Funding scheme (or “Type of Action”) inside a programme with common features. It specifies: the scope of what is funded; the reimbursement rate; specific evaluation criteria to qualify for funding; and the use of simplified forms of costs like lump sums.

MSCA-IF-EF-ST - Standard EF

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Call for proposal

Procedure for inviting applicants to submit project proposals, with the aim of receiving EU funding.

(opens in new window) H2020-MSCA-IF-2014

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Coordinator

CENTRE NATIONAL DE LA RECHERCHE SCIENTIFIQUE CNRS
Net EU contribution

Net EU financial contribution. The sum of money that the participant receives, deducted by the EU contribution to its linked third party. It considers the distribution of the EU financial contribution between direct beneficiaries of the project and other types of participants, like third-party participants.

€ 173 076,00
Total cost

The total costs incurred by this organisation to participate in the project, including direct and indirect costs. This amount is a subset of the overall project budget.

€ 173 076,00
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