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DYNASING

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Dynamic single molecule approach to DNA homologous recombination

The goal of the research is to understand the mechanisms and biological function of complex genome transactions such as homologous recombination. Homologous recombination, the exchange of sequences between homologous DNA molecules... ver más

31/03/2010

ERASMUS MC

227K€

Presupuesto del proyecto: 227K€

Líder del proyecto

ERASMUS UNIVERSITAIR MEDISCH CENTRUM ROTTERDA... 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 2010-03-31 No tenemos la información de la convocatoria

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1 Participantes

ERASMUS MC

0.00€ | Lider

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Líder del proyecto

ERASMUS UNIVERSITAIR MEDISCH CENTRUM ROTTERDA... No se ha especificado una descripción o un objeto social para esta compañía.

TRL 4-5

Presupuesto del proyecto 227K€

Fecha límite de participación Sin fecha límite de participación.

Descripción del proyecto The goal of the research is to understand the mechanisms and biological function of complex genome transactions such as homologous recombination. Homologous recombination, the exchange of sequences between homologous DNA molecules, is essential for accurate genome duplication, DNA damage repair and chromosome segregation. Single molecule analysis provides information on intermediate states, functional and structural variability and the distribution of variable states that cannot be recovered from bulk biochemical assays. The random variation in the details of molecular behavior, that we can now determine with single molecule mechanistic studies are of great importance for understanding how relatively simple biochemical activities are combined to create complex and adaptable living systems. Understanding the mechanism of homologous recombination as well as its control requires specific detailed descriptions of the conformational dynamics of the recombinase proteins and their DNA substrates, specifically the assembly and disassembly of the active recombinase-DNA nucleoprotein filament. Recombination proteins labelled with a flourophore will be use in single molecule fluorescence microscopy assays. The main objectives are: 1 Analyze the dynamic rearrangements between DNA and Rad51 to gain insight into the key events that drive DNA strand exchange. 2 Analyze the effect of accessory factors of Rad51 on its assembly/disassembly from DNA to gain insight into mechanisms that limit homologous recombination to appropriate locations. DNA damaging agents, such as ionizing radiation and interstrand DNA crosslinking compounds, provide important treatment modalities against cancer. Among the proteins implicated in repair of DNA damage induced by these agents are the homologous recombination. By analyzing the mechanism through which these proteins cooperate in DSB repair, we expect to provide insights into the molecular assembly pathways of the ‘guardians of the genome’.

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