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DROSOPIRNAS

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The piRNA pathway in the Drosophila germline a small RNA based genome immune s...

The piRNA pathway in the Drosophila germline a small RNA based genome immune system The discovery of RNA interference (RNAi) has revolutionized biology. As a technology it opened up new experimental and therapeutic avenues. As a biological phenomenon it changed our view on a diverse array of cellular processes. A... ver más

31/08/2015

IMBA

2M€

Presupuesto del proyecto: 2M€

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INSTITUT FUER MOLEKULARE BIOTECHNOLOGIE GMBH No se ha especificado una descripción o un objeto social para esta compañía.

TRL 4-5

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Financiación concedida El organismo FP7 notifico la concesión del proyecto el día 2015-08-31 No tenemos la información de la convocatoria

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Líder del proyecto

INSTITUT FUER MOLEKULARE BIOTECHNOLOGIE GMBH 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 The discovery of RNA interference (RNAi) has revolutionized biology. As a technology it opened up new experimental and therapeutic avenues. As a biological phenomenon it changed our view on a diverse array of cellular processes. Among those are the control of gene expression, the suppression of viral replication, the formation of heterochromatin and the protection of the genome against selfish genetic elements such as transposons. I propose to study the molecular mechanism and the biological impact of a recently discovered RNAi pathway, the Piwi interacting RNA pathway (piRNA pathway). The piRNA pathway is an evolutionarily conserved small RNA pathway acting in the animal germline. It is the key genome surveillance system that suppresses the activity of transposons. Recent work has provided a conceptual framework for this pathway: According to this, the genome stores transposon sequences in heterochromatic loci called piRNA clusters. These provide the RNA substrates for the biogenesis of 23-29 nt long piRNAs. An amplification cycle steers piRNA production predominantly to those cluster regions that are complementary to transposons being active at a given time. Finally, piRNAs guide a protein complex centered on Piwi-proteins to complementary transposon RNAs in the cell, leading to their silencing. In contrast to other RNAi pathways, the mechanistic framework of the piRNA pathway is largely unknown. Moreover, the spectrum of biological processes impacted by it is only poorly understood. piRNAs are for example not only derived from transposon sequences but also from various other genomic repeats that are enriched at telomeres and in heterochromatin. We will systematically dissect the piRNA pathway regarding its molecular architecture as well as its biological functions in Drosophila. Our studies will be a combination of fly genetics, proteomics and genomics approaches. Throughout we aim at linking our results back to the underlying biology of germline development.

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