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Cryo-H-Rec

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Cryo EM Imaging of Histone Recycling at the Replication Fork

DNA replication is essential for cell proliferation. In eukaryotic cells, DNA is densely packaged in nucleosome arrays that form chromatin. Such organisation protects the genetic material and controls access to DNA, thus providing... ver más

31/03/2021

The Francis Crick...

213K€

Presupuesto del proyecto: 213K€

Líder del proyecto

THE FRANCIS CRICK INSTITUTE LIMITED 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 H2020 notifico la concesión del proyecto el día 2021-03-31

MSCA-IF-2018: Individual Fellowships

I+D

Cerrada hace 6 años

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Información adicional privada

No hay información privada compartida para este proyecto. Habla con el coordinador.

1 Participantes

The Francis Crick Institute

212.93K€ | Lider

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Duración del proyecto: 24 meses Fecha Inicio: 2019-03-18
Fecha Fin: 2021-03-31

Líder del proyecto

THE FRANCIS CRICK INSTITUTE LIMITED No se ha especificado una descripción o un objeto social para esta compañía.

TRL 4-5

Presupuesto del proyecto 213K€

Fecha límite de participación Sin fecha límite de participación.

Descripción del proyecto DNA replication is essential for cell proliferation. In eukaryotic cells, DNA is densely packaged in nucleosome arrays that form chromatin. Such organisation protects the genetic material and controls access to DNA, thus providing an important mechanism for regulating gene expression. The eukaryotic replication machinery has evolved to unravel nucleosomes in order to access and duplicate DNA, while also maintaining chromatin density on newly duplicated DNA. To achieve this, the replisome dismantles nucleosomes ahead of the replication fork and reassembles them on nascent DNA strands, by coordinating redeposition of parental and newly synthesized histones. Histone proteins are subject to an array of post-translational modifications (PTMs), providing an epigenetic code that modulates activation and silencing of specific chromosomal regions. Redeposition of parental histones with their PTMs on both nascent DNA strands is, thus, pivotal in transmission of the epigenetic marks to daughter cells. I intend to perform in vitro reconstitution of the replisome on a chromatinised template and use cryo-electron microscopy to image DNA duplication and parental histone recycling at the replication fork. I seek to describe different structural intermediates in the process of nucleosome disassembly, DNA duplication and histone incorporation into new nucleosomes. To capture and characterise intermediate states of the replication machinery during this concerted process, I will employ a multidisciplinary approach and resort to structural techniques complementary to cryo-EM like solution NMR spectroscopy and crosslinking-mass spectrometry (XL-MS). My results will help dissect the role of different replisome components in nucleosome reshuffling at the replication fork, and elucidate the molecular mechanism that underpins chromosome replication and epigenetic inheritance.

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