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How is phosphoinositide 3 kinase beta regulated by G Protein Coupled Receptors a...

How is phosphoinositide 3 kinase beta regulated by G Protein Coupled Receptors and by Rab 5? Many signaling pathways in human cells involve lipid recognition events. The phosphorylation state of these lipids is under the control of both lipid kinases and lipid phosphatases. The phosphorylated second messenger lipids recru... ver más

31/12/2013

NC3Rs

209K€

Presupuesto del proyecto: 209K€

Líder del proyecto

National Centre for the Replacement Refinemen... 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 2013-12-31 No tenemos la información de la convocatoria

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1 Participantes

NC3Rs

0.00€ | Lider

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Líder del proyecto

National Centre for the Replacement Refinemen... No se ha especificado una descripción o un objeto social para esta compañía.

TRL 4-5

Presupuesto del proyecto 209K€

Fecha límite de participación Sin fecha límite de participación.

Descripción del proyecto Many signaling pathways in human cells involve lipid recognition events. The phosphorylation state of these lipids is under the control of both lipid kinases and lipid phosphatases. The phosphorylated second messenger lipids recruit lipid adaptor molecules, which regulate fundamental cellular processes including cell survival, proliferation, motility, differentiation and intracellular trafficking. Phosphoinositide 3-kinases (PI3Ks) are a family of lipid kinases that phosphorylate the 3’ hydroxyl group of inositol phosphate. The class IA PI3K family is associated with diseases including cancer, thrombosis, allergies and arthritis. Although it is clear that these PI3Ks are activated by Receptor Tyrosine Kinases (RTKs), PI3Kβ is the single member of the PI3Ks that is activated downstream of both RTKs and G-protein coupled receptors (GPCRs). Using a combination of X-ray crystallography, in vitro activity assays and cellular experiments, I want to characterise the mechanisms specific to PI3Kß regulation. A first step will consist in the determination of PI3Kß structures in complex with G-protein ßγ heterodimers and with the small GTPase Rab5. That structural information will serve as an invaluable framework for further design of in vitro and cellular experiments to interrogate the exclusive mechanism of PI3Kβ regulation. Because of the potential role of PI3Kβ in oncogenesis and thrombosis, I will also determine the structures of PI3Kß in complexes with a panel of PI3K isoform-specific inhibitors. These structures will provide the basis for the next generation of therapeutics. This project will weave threads of structural, biophysical, biochemical and cell biology into a tapestry that depicts the roles of this unique enzyme that stands at the cross-road of RTK and GPCR signalling.

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