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Mitochondrial translational regulation coupled to respiratory chain assembly and...

Mitochondrial translational regulation coupled to respiratory chain assembly and protein import "Mitochondrial respiratory chain complexes assemble from nuclear- and mitochondria-encoded subunits in the inner membrane. To protect cells from accumulating unassembled subunits in the membrane, ROS generation, or damage of mitoc... ver más

31/01/2019

UMG

2M€

Presupuesto del proyecto: 2M€

Líder del proyecto

UNIVERSITAETSMEDIZIN GOETTINGEN GEORGAUGUSTU... 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 2019-01-31 No tenemos la información de la convocatoria

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1 Participantes

UMG

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Líder del proyecto

UNIVERSITAETSMEDIZIN GOETTINGEN GEORGAUGUSTU... 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 "Mitochondrial respiratory chain complexes assemble from nuclear- and mitochondria-encoded subunits in the inner membrane. To protect cells from accumulating unassembled subunits in the membrane, ROS generation, or damage of mitochondrial integrity, regulatory mechanisms to balance and control the fidelity of the assembly process have evolved, encorporating a retention system enabling the preservation of a select few founding complexes for on-demand assembly. In yeast mitochondria, a feedback mechanism has been identified for the cytochrome oxidase in which assembly-intermediates specifically inactivate translation of the core subunit Cox1. It is controversially debated if similar translation regulating mechanisms exist in human mitochondria. However, our recent findings show that in human mitochondria assembly intermediates of respiratory chain complexes affect translation, nevertheless the underlying sensing and signalling mechanisms as well as the protein components appear to be more complex than in yeast. We aim to understand how this regulatory cycle is established; how does a distinct assembly intermediate of cytochrome oxidase signal the translation system, and how the influx of imported subunits contributes to this process. These goals are conceptually deeply rooted in a comprehensive understanding of the membrane protein complex assembly process and the factors that promote its progression. These objectives are of key importance for understanding the molecular pathology of mitochondrial encephalomyopathies that are frequently due to respiratory chain assembly and quality control malfunction. The aim of our analyses is to provide insight as to how translation can be coupled to the assembly of a membrane protein complex comprised of subunits of dual genetic origin and to decipher mitochondrial translational regulation coupling to the influx of imported nuclear encoded subunits."

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