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Co-coAssembly

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Structural and mechanistic study of co translationally interacting nascent chain...

Structural and mechanistic study of co translationally interacting nascent chains Almost all fundamental biological processes involve protein complexes and therefore, efficient folding and assembly of homo- and hetero-oligomers is critical for cellular functionality and integrity. Recent studies have shown that... ver más

02/10/2022

UHEI

175K€

Presupuesto del proyecto: 175K€

Líder del proyecto

RUPRECHTKARLSUNIVERSITAET HEIDELBERG 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 2022-10-02

MSCA-IF-2019: Individual Fellowships

I+D

Cerrada hace 5 años

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1 Participantes

UHEI

174.81K€ | Lider

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Duración del proyecto: 30 meses Fecha Inicio: 2020-03-27
Fecha Fin: 2022-10-02

Líder del proyecto

RUPRECHTKARLSUNIVERSITAET HEIDELBERG No se ha especificado una descripción o un objeto social para esta compañía.

TRL 4-5

Presupuesto del proyecto 175K€

Fecha límite de participación Sin fecha límite de participación.

Descripción del proyecto Almost all fundamental biological processes involve protein complexes and therefore, efficient folding and assembly of homo- and hetero-oligomers is critical for cellular functionality and integrity. Recent studies have shown that many protein complexes assemble co-translationally by one fully-synthesized subunit engaging another subunit that is still in nascent state (co-post assembly). An ongoing study in the Bukau lab now revealed that assembly can also occur by interaction of two partner nascent chains (co-co assembly). Co-co assembly is mostly employed for the formation of homo-oligomers and exists in all kingdoms of life.. Despite initial evidence of its existence, very little is known about the molecular mechanisms driving co-co assembly. This includes information on whether co-co assembly requires co-localization of two polysomes or can happen on one polysome.. Furthermore, it is currently unclear whether co-co interactions require preceding nascent chain folding steps and to what extent co-translationally acting chaperones coordinate the process and the impact of translation speed on co-co assembly. I propose to study mechanisms of co-co assembly using the dimeric chorismate mutase (PheA) as a representative top candidate from a high throughput screen for co-co assembling protein complexes in E. coli. Employing cryo-electron tomography, I will analyse the three dimensional arrangement of E. coli ribosomes in the context of a polysome to assess how organization of translational machinery allows co-co assembly. Moreover, I will study the co-translational cascade of folding steps of chorismate mutase by utilizing FRET on in vitro prepared nascent chains. Finally, I plan to explore the impact of co-translationally acting chaperones and translation kinetics on co-co assembly, by performing disome-selective profiling analysis in chaperone mutant cells lacking Trigger Factor and DnaK and in mutants that synthesize proteins with reduced translation kinetics.

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