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The Telosome: Deciphering the architecture of the shelterin complex and its network

Objective

Telomeres of eukaryotic chromosomes are protected by the shelterin complex. The human shelterin is a six-subunit protein assembly (TRF1, TRF2, TPP1, POT1, TIN2, Rap1). This complex associates with telomeric DNA and prevents the mistaken detection of the telomeres as double strand breaks by the DNA Damage Response (DDR) machinery. Illicit DNA repair at telomeres results in cell cycle arrest and end-to-end chromosomal fusions or other improper recombinations causing genome instability. The abrogation of the shelterin assembly or subunit removal decompacts the telomere and causes DDR accumulation. Defects in the shelterin complex are associated with telomere-related pathologies such as cancer and aging.
The supra-structure of the mammalian shelterin complex remains unknown. Therefore, we lack fundamental knowledge regarding its organization and function.
The shelterin complex also acts as a signalling hub, recruiting accessory factors that participate in telomere homeostasis and maintenance; and shelterin subunits are subjected to posttranslational modifications (i.e. ubiquitination, phosphorylation, SUMOylation); however, the functional role of these modifications is not fully understood.
The overarching aim of this project is to solve the atomic structure of the human shelterin complex by cryo-EM and elucidate the molecular events of telomere biology during the cell cycle combining cellular and proteomic approaches.
The outcomes will provide the first structure of the shelterin complex and the shelterin interactome, which will allow to understand defects underlying pathology at molecular level and join this information to physiologic and phenotypic data.
This project will have a substantial impact on my career, as new skills in biophysics, structural biology and proteomic techniques on human macromolecular complexes will complement my previous expertise in X-ray crystallography, biophysics, and biochemistry on bacterial and viral proteins.

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Topic(s)

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HORIZON-TMA-MSCA-PF-EF - HORIZON TMA MSCA Postdoctoral Fellowships - European Fellowships

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Call for proposal

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(opens in new window) HORIZON-MSCA-2021-PF-01

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Coordinator

KOBENHAVNS UNIVERSITET
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.

€ 230 774,40
Address
NORREGADE 10
1165 KOBENHAVN
Denmark

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Region
Danmark Hovedstaden Byen København
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.

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