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MIRFUNCTION

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Cerrado

Dissecting the mechanisms of miRNA function

miRNAs are crucial regulators of gene expression that target more than half of eukaryotic genes and play a role in human diseases, including cancer and neurological disorders. Therefore, it is important to understand the molecular... ver más

30/04/2018

MDC

100K€

Presupuesto del proyecto: 100K€

Líder del proyecto

MAX DELBRUECK CENTRUM FUER MOLEKULARE MEDIZIN... 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 2018-04-30 No tenemos la información de la convocatoria

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1 Participantes

MDC

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Líder del proyecto

MAX DELBRUECK CENTRUM FUER MOLEKULARE MEDIZIN... No se ha especificado una descripción o un objeto social para esta compañía.

TRL 4-5

Presupuesto del proyecto 100K€

Fecha límite de participación Sin fecha límite de participación.

Descripción del proyecto miRNAs are crucial regulators of gene expression that target more than half of eukaryotic genes and play a role in human diseases, including cancer and neurological disorders. Therefore, it is important to understand the molecular mechanisms underlying miRNA-mediated repression. miRNAs act as guides recognizing their target mRNAs by partial complementarity and recruiting a complex of proteins that represses mRNA expression. In this complex, proteins of GW182 family are the key effectors mediating repression. We have shown that GW182 recruits deadenylation complexes via novel protein motifs (W-motifs), leading to translational repression and mRNA deadenylation. Translational repression by deadenylases occurs independently of deadenylation by a mechanism, which is still mysterious. Thus, our first goal will be (1) to analyze the mechanism of translational repression by deadenylases and its contribution to miRNA silencing. Our preliminary data show that W-motifs recruiting the deadenylation complex (CCR4-NOT) are not restricted to the GW182 family and can be found in other proteins involved in RNA metabolism. The roles of W-motifs in these proteins are completely unknown, but important to investigate if we want to better understand the mechanisms of RNA silencing. The fact that CCR4-NOT is involved not only in mRNA deadenylation and translation, but also in other steps of RNA metabolism, including transcription, RNA processing and export, suggests that proteins with W-motifs have the potential to orchestrate gene expression at different levels. Thus, our next goal will be (2) to investigate more broadly the full repressive potential of W-motifs. In a wider context, this proposal will explore the roles of miRNAs in such important and global processes as subcellular localization and translation of mRNAs. Addressing these questions will make substantial advances in our understanding of miRNA function and mechanisms of gene regulation.

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