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Mechanisms at the interface of DNA damage repair and transcription

Bulky DNA lesions are a major obstacle during gene transcription by RNA polymerase II enzymes (RNAPII). The stalling of RNAPII at DNA lesions triggers a genome-wide transcriptional arrest. Transcription-coupled repair (TCR) is a s... ver más

31/05/2027

Leiden University...

2M€

Presupuesto del proyecto: 2M€

Líder del proyecto

ACADEMISCH ZIEKENHUIS LEIDEN 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 HORIZON EUROPE notifico la concesión del proyecto el día 2022-06-01

ERC-2021-COG: ERC CONSOLIDATOR GRANTS Scope:Objectives

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Cerrada hace 3 años

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Leiden University Medical Ce...

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Duración del proyecto: 59 meses Fecha Inicio: 2022-06-01
Fecha Fin: 2027-05-31

Líder del proyecto

ACADEMISCH ZIEKENHUIS LEIDEN No se ha especificado una descripción o un objeto social para esta compañía.

TRL 4-5

Presupuesto del proyecto 2M€

Fecha límite de participación Sin fecha límite de participación.

Descripción del proyecto Bulky DNA lesions are a major obstacle during gene transcription by RNA polymerase II enzymes (RNAPII). The stalling of RNAPII at DNA lesions triggers a genome-wide transcriptional arrest. Transcription-coupled repair (TCR) is a specialized DNA repair pathway that selectively removes DNA lesions from actively transcribed genes to restore transcription. Stalled RNAPII at DNA lesions forms a roadblock for advancing DNA replication forks resulting in toxic collisions. The mechanisms that enable the repair of transcription-blocking DNA lesions, the restoration of transcription after repair and the resolution of transcription-replication conflicts are poorly understood. To address these knowledge gaps, I propose to establish a series of innovative approaches aimed at identifying the mechanisms involved in the cellular responses to transcription-blocking DNA damage. We will focus on the functional characterization of known and several promising new TCR factors that we recently identified in combined genome-wide CRISPR and targeted proteomics screens. I propose to dissect the role of known and new TCR proteins by (1) applying a genome-wide approach for directly measuring TCR activity in combination with proximity-labelling proteomics and genetic-interaction mapping to define how TCR complexes assemble and operate, (2) identifying the mechanisms in transcription restoration by combining advanced genomics methods to map nascent transcripts, monitor RNAPII occupancy, and correlate these with specific chromatin modifications in a genome-wide manner, and (3) dissecting the mechanisms involved in resolving transcription-replication conflicts by combining functional DNA replication assays with genome-wide approaches to map transcription, R-loops and DNA replication directionality. This ERC project will break new grounds by offering a detailed understanding of the mechanisms that enable cells to overcome transcriptional roadblocks.

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