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DissectIFT

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In vitro reconstitution and mechanistic dissection of Intraflagellar Transport i...

In vitro reconstitution and mechanistic dissection of Intraflagellar Transport in C.elegans sensory cilia Cilia are microtubule-based protrusions of the plasma membrane found on many eukaryotic cells, including most cell types of the human body. Whereas the functions of motile cilia were immediately obvious, the role of the immotile o... ver más

28/02/2019

TUM

1M€

Presupuesto del proyecto: 1M€

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TECHNISCHE UNIVERSITAET MUENCHEN No se ha especificado una descripción o un objeto social para esta compañía.

TRL 4-5

Fecha límite participación Sin fecha límite de participación.

Financiación concedida El organismo FP7 notifico la concesión del proyecto el día 2019-02-28 No tenemos la información de la convocatoria

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TUM

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Líder del proyecto

TECHNISCHE UNIVERSITAET MUENCHEN No se ha especificado una descripción o un objeto social para esta compañía.

TRL 4-5

Presupuesto del proyecto 1M€

Fecha límite de participación Sin fecha límite de participación.

Descripción del proyecto Cilia are microtubule-based protrusions of the plasma membrane found on many eukaryotic cells, including most cell types of the human body. Whereas the functions of motile cilia were immediately obvious, the role of the immotile or so-called primary cilia remained largely unrecognized for many decades. Once referred to as aberrant solitary cilia with no obvious function, these ancient structures now hold the promise of revealing no less than the secrets of multicellularity and development. Even though the importance of primary cilia is now evident, molecular mechanisms underlying their assembly and function are far from being understood. The construction and maintenance of cilia relies on an ancient, universally conserved machinery termed IntraFlagellar Transport (IFT). IFT requires a multi-subunit, non-membranous protein complex assembled from more than 20 distinct subunits. At the heart of IFT are the microtubule-associated motors, -kinesin and dynein-, that continuously ferry cargo in a bi-directional fashion needed for ciliary assembly and function. To pave the way towards a molecular understanding of this fascinating organelle, we propose to employ a bottom-up approach in which we stepwise reconstitute the IFT complex from recombinantly expressed subunits of the so far best understood primary cilium from C.elegans. The structural integrity and stability of the IFT complex will be characterized using multifaceted approaches such as chemical crosslinking or thermophoresis. To mechanistically dissect the kinesin-dependent transport in vitro, we will make use of enzymatic bulk and single-molecule assays. Collectively, these results will provide a quantitative understanding of the assembly and kinesin-dependent motility of the IFT machinery. Given that cells mobilize ~600 components to build their cilia, this experimental platform will significantly streamline future efforts to identify novel cargoes and the effects of putative regulators of the IFT machinery.

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