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Experimental and theoretical investigations on the microtubule-mediated formation of intracellular protein patterns

Obiettivo

A key question in modern cell biology is how intracellular spatial order is established and maintained. Here, we propose to investigate the physical principles of the formation of intracellular protein patterns, using a multidisciplinary approach that combines quantitative live-cell imaging with computational modeling.

As an in vivo model system we will use fission yeast, which is distinguished by its extraordinarily well-defined shape and intracellular order. In fission yeast, a dynamic microtubule transport system maintains a highly inhomogeneous distribution of the growth-promoting protein tea1. Perturbing the distribution of tea1 leads to severe defects of cell morphology.

We will address the following questions:
- How does the dynamic patterning of tea1 depend on microtubule growth and shrinkage dynamics?
- What is the spatiotemporal accuracy of tea1 pattering?
- How is the transport system affected by cell elongation?
- What are the general differences between protein transports along dynamic as opposed to static microtubules?

We will address these questions using a combination of both experiments and theoretical analysis. Specifically, we will use confocal spinning disc microscopy to measure the time-dependent 3D distribution of fluorescently tagged tea1, tubul in and other relevant proteins.

Based on the data acquired and on existing information, we will formulate a model of tea1 patterning. Predictions following from the model will again be tested experimentally, e.g. using drugs or genetic modifications to perturb the system.

This tight link between theory and experiments will provide novel and comprehensive information on generic properties of microtubule-based transport: a process that is of key relevance to protein patterning in most eukaryotic cells.

During this project, the researcher will receive extensive training in biophysics and computational modeling, thereby significantly broadening his scientific competencies.

Campo scientifico (EuroSciVoc)

Argomento(i)

Invito a presentare proposte

FP6-2005-MOBILITY-5
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Meccanismo di finanziamento

EIF - Marie Curie actions-Intra-European Fellowships

Coordinatore

STICHTING VOOR FUNDAMENTEEL ONDERZOEK DER MATERIE
Contributo UE
Nessun dato
Costo totale
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