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Deciphering the molecular dynamics of centriole and centrosome biogenesis

Project description

Molecular insight into centrosome biogenesis

Centrosomes are complex cellular organelles composed of hundreds of proteins and drive mitotic spindle formation during cell division. Their fundamental importance is underscored by the observation that cancer cells are characterised by aberrant centrosome numbers. The EU-funded CENTROMD project will use Drosophila melanogaster as a model organism to study the interactions between key proteins in centrosomes and how they contribute to regulate the number and size of these organelles during the cell cycle. The project's results will be of great interest to cell biology and cancer research and may help identify novel anti-cancer targets.

Objective

Centrosomes are organelles composed of a pair of centrioles surrounded by a pericentriolar matrix (PCM) that perform a variety of key functions in the animal cell. Centrosomes duplicate precisely once during S-phase of the cell cycle; in G2-phase the two centrosomes move to opposite locations around the nucleus and expand their PCM to nucleate vast quantities of microtubules for mitotic spindle formation. Dysfunctions in the centrosome cycle have been associated with a wide range of pathologies and, in particular, centrosome amplification, an aberrant increase in centrosome numbers, is a hallmark of most human cancers. Centrosomes are complex machines composed of hundreds of proteins, however significant efforts over the past decades have identified the key elements which are essential for centriole and centrosome biogenesis. We can now address the molecular mechanisms that mediate interactions between key players and how these contribute to regulate the number and size of these organelles during the cell cycle. Elucidating these mechanisms is of great interest to cell biology and cancer research. This research proposal aims to investigate aspects of centriole and centrosome biogenesis using Drosophila melanogaster as an animal model. The main objectives are: 1), to reconstitute initial steps of centriole assembly using a hybrid in vivo/in vitro approach, where I will study the molecular dynamics of the interaction between key centriolar proteins Asl and Plk4, using functionalised microspheres as a scaffold and 2), to analyse the dynamic behaviour of single molecules of key centrosomal proteins Cnn and Spd-2 as they move throughout the PCM during expansion, using super-resolution microscopy techniques. We are confident that these studies will provide novel insights into the design principles and inner workings of these important organelles.

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Topic(s)

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Funding Scheme

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MSCA-IF - Marie Skłodowska-Curie Individual Fellowships (IF)

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Call for proposal

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(opens in new window) H2020-MSCA-IF-2019

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Coordinator

THE CHANCELLOR, MASTERS AND SCHOLARS OF THE UNIVERSITY OF OXFORD
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.

€ 212 933,76
Address
WELLINGTON SQUARE UNIVERSITY OFFICES
OX1 2JD Oxford
United Kingdom

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Region
South East (England) Berkshire, Buckinghamshire and Oxfordshire Oxfordshire
Activity type
Higher or Secondary Education Establishments
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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.

€ 212 933,76
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