Project description
Structure and function of the minimal receptor kinase signalling complex in plants
Plasma membrane-localised receptor kinases (RKs) function in plant signalling pathways during development, reproduction, and response to environmental stresses. They have different biochemical functions, and in addition to ligand-binding, some RKs play a regulatory role within RK complexes. The proposed EU-funded MINIREX project aims to discover the minimal components linking ligand binding to receptor activation and to the initiation of cellular processes, as well as the structural mechanisms of receptor complex activation. The objective is to analyse ligand-induced structural changes by cryo-electron microscopy of membrane-embedded RK complexes, using the plant immune receptor FLS2 (which perceives bacterial flagellin) as a model system.
Objective
Plasma membrane-localized receptor kinases (RKs) perceive diverse extracellular ligands, allowing plants to react to various stimuli. They function in signaling processes during all aspects of plants’ life, including development, biotic and abiotic stress responses as well as reproduction. In the last decade, a major paradigm has emerged that individual RKs have different biochemical functions. There are e.g. ligand-binding RKs, which require the formation of stable complexes with RK co-receptors in order to initiate signaling. In addition to this common mode of activation, it has been revealed that additional RKs can have regulatory functions within RK complexes, and that in planta several other proteins are part of these complexes to regulate – either positively or negatively – complex formation and initiation of downstream signaling.
The proposed project aims to understand what the minimal components linking ligand binding to receptor activation and to the initiation of cellular outputs are. Furthermore, it has the goal to elucidate the structural mechanisms of receptor complex activation. To achieve this, two interconnected approaches will be pursued. The first will utilize protein expression in cell-culture to reconstitute the signaling pathway from ligand perception to activation of downstream targets. The second approach will use a cell-free in vitro expression system to reconstitute the complete RK complex in synthetic, membrane-mimicking nanodiscs. This will ultimately allow the analysis of ligand induced structural changes by cryo-electron microscopy within full length, membrane embedded RK complexes.
The well-characterized RK FLAGELLIN SENSING 2 (FLS2) and its co-receptor RK BRI1-ASSOCIATED KINASE 1 (BAK1), which are core elements of the receptor complex mediating the perception of bacterial Flagellin and function in the induction of antibacterial immune responses, will be to this end employed as a model for the proposed project.
Fields of science (EuroSciVoc)
CORDIS classifies projects with EuroSciVoc, a multilingual taxonomy of fields of science, through a semi-automatic process based on NLP techniques. See: The European Science Vocabulary.
CORDIS classifies projects with EuroSciVoc, a multilingual taxonomy of fields of science, through a semi-automatic process based on NLP techniques. See: The European Science Vocabulary.
- natural sciences biological sciences biochemistry biomolecules proteins
- natural sciences physical sciences optics microscopy
- medical and health sciences basic medicine immunology
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Keywords
Project’s keywords as indicated by the project coordinator. Not to be confused with the EuroSciVoc taxonomy (Fields of science)
Project’s keywords as indicated by the project coordinator. Not to be confused with the EuroSciVoc taxonomy (Fields of science)
Programme(s)
Multi-annual funding programmes that define the EU’s priorities for research and innovation.
Multi-annual funding programmes that define the EU’s priorities for research and innovation.
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H2020-EU.1.3. - EXCELLENT SCIENCE - Marie Skłodowska-Curie Actions
MAIN PROGRAMME
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H2020-EU.1.3.2. - Nurturing excellence by means of cross-border and cross-sector mobility
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Topic(s)
Calls for proposals are divided into topics. A topic defines a specific subject or area for which applicants can submit proposals. The description of a topic comprises its specific scope and the expected impact of the funded project.
Calls for proposals are divided into topics. A topic defines a specific subject or area for which applicants can submit proposals. The description of a topic comprises its specific scope and the expected impact of the funded project.
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.
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 - Marie Skłodowska-Curie Individual Fellowships (IF)
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Call for proposal
Procedure for inviting applicants to submit project proposals, with the aim of receiving EU funding.
Procedure for inviting applicants to submit project proposals, with the aim of receiving EU funding.
(opens in new window) H2020-MSCA-IF-2019
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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.
8006 Zurich
Switzerland
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.