Project description
Molecular insight into the dynamics of the actin cytoskeleton
Cell shape and movement are primarily driven by the actin cytoskeleton, a dynamic network of actin filaments. Mutations in actin impair cell integrity and function and may lead to disease. The scope of the EU-funded MolecularArp project is to delve into the role of the Arp2/3 protein complex, which is responsible for the branching of actin filaments. Researchers will investigate the individual properties of the different Arp2/3 complexes and delineate their impact on the structure and function of the actin cytoskeleton as well as on cell migration. Overall, the project will provide important insight into the dynamics of the cell cytoskeleton and the diversity of its molecular determinants.
Objective
The actin cytoskeleton is a dynamic polymer system, that provides the driving force and structural support for the physical integrity of cells, and their interactions. It also regulates many essential cellular processes, such as membrane trafficking and cell migration. Not surprisingly, its malfunction results in a wide variety of syndromes and diseases. Branched actin networks can only be assembled by the Arp2/3 complex, consisting of seven protein subunits. Activated by nucleation promoting factors (NPFs), Arp2/3 binds to the side of an actin filament to initiate an actin branch and new filament growth. Arp2/3 has been regarded as a single entity, but in mammals, three of its subunits exist as two isoforms, thus allowing the formation of 8 different complexes. Recent work demonstrates that the 8 human Arp2/3 complexes have unique cellular properties. However, it is unclear why these complexes are so different and whether they have distinct cellular functions. Using in vitro biochemical assays and single molecule analysis together with sophisticated cell biology approaches, I will determine the molecular basis for the individual properties of the different Arp2/3 complexes. Observing in vitro reconstituted actin networks, I will perform a detailed analysis of the actin nucleation properties of the 8 Arp2/3 complexes and the impact of different NPFs. In addition, I will also analyse actin branch disassembly to uncover the molecular basis of actin debranching, which still remains to be established. To investigate the cellular function of individual Arp2/3 family members, I will generate genome edited cells expressing defined Arp2/3 complexes and examine their lamellipodial actin dynamics and cell migration. Moreover, by generating Arp2/3 complex specific biosensors, I will map the cellular distribution of individual Arp2/3 complexes. My combined approaches will allow me to understand the molecular and cellular basis of Arp2/3 diversity in humans.
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 biological sciences cell biology
- natural sciences chemical sciences polymer sciences
- natural sciences biological sciences zoology mammalogy
- natural sciences biological sciences genetics genomes
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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-2020
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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.
NW1 1AT London
United Kingdom
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.