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AvINFLUENZA

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Molecular basis of avian influenza polymerase adaptation to human hosts

Due to its high prevalence among birds and high human fatality rate, avian influenza represents a serious and continuing pandemic threat, in particular via mutations that facilitate human infection, resulting in pathogenic strains... ver más

30/06/2021

CNRS

185K€

Presupuesto del proyecto: 185K€

Líder del proyecto

CENTRE NATIONAL DE LA RECHERCHE SCIENTIFIQUE... 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 2021-06-30

MSCA-IF-2017: Individual Fellowships Objective:The goal of the Individual Fellowships is to enhance the creative and innovative potential...

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Este proyecto no cuenta con búsquedas de partenariado abiertas en este momento.

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1 Participantes

CNRS

185.08K€ | Lider

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Duración del proyecto: 38 meses Fecha Inicio: 2018-04-25
Fecha Fin: 2021-06-30

Líder del proyecto

CENTRE NATIONAL DE LA RECHERCHE SCIENTIFIQUE... No se ha especificado una descripción o un objeto social para esta compañía.

TRL 4-5

Presupuesto del proyecto 185K€

Fecha límite de participación Sin fecha límite de participación.

Descripción del proyecto Due to its high prevalence among birds and high human fatality rate, avian influenza represents a serious and continuing pandemic threat, in particular via mutations that facilitate human infection, resulting in pathogenic strains. Mutations associated with human infection are concentrated in the PB2 subunit of influenza polymerase. This subunit is imported into the nucleus, where viral replication and transcription occurs, via a selective interaction with host importin-alpha proteins. Once in the nucleus, interaction of PB2 with another host protein called ANP32A, has been proposed to play an essential species-specific regulatory role. The behavior of PB2 in solution reveals a high level of conformational flexibility that is essential to function. In addition, intrinsically disordered domains of both ANP32A and importin-alpha are thought to play important roles in the interaction with PB2. This uncommonly high level of disorder presents particular challenges for standard structural studies. This project aims to characterize structurally two protein-protein interactions of the human-adapted PB2 subunit of influenza polymerase with these two human proteins: 1. Importin-alpha 2. ANP32A Highly dynamic complexes such as the targets of this proposal lie outside of the scope of standard methods of structural biology, and are therefore often not described. The high level of flexibility of these systems requires an innovative and integrative structural approach that will combine paramagnetic NMR with techniques such as ensemble methods to describe the conformational equilibria of highly dynamic systems, NMR relaxation dispersion and CEST, SAXS and single-molecule FRET. Through the structural and dynamic characterization of these interactions between human-adapted avian influenza polymerase and two human host proteins, we will contribute to a deeper understanding of viral replication, providing the basic information to facilitate the design of innovative drugs.

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