UV-B PERCEPTION

UV-B perception and signalling by the UVR8 photoreceptor

Coordinatore	UNIVERSITE DE GENEVE    more Spiacenti, non ci sono informazioni su questo coordinatore. Contattare Fabio per maggiori infomrazioni, grazie.
Nazionalità Coordinatore	Switzerland [CH]
Totale costo	1˙498˙579 €
EC contributo	1˙498˙579 €
Programma	FP7-IDEAS-ERC Specific programme: "Ideas" implementing the Seventh Framework Programme of the European Community for research, technological development and demonstration activities (2007 to 2013)
Code Call	ERC-2012-StG_20111109
Funding Scheme	ERC-SG
Anno di inizio	2012
Periodo (anno-mese-giorno)	2012-12-01   -   2017-11-30

 Partecipanti

#	participant	country	role	EC contrib. [€]
1	UNIVERSITE DE GENEVE  Organization address address: Rue du General Dufour 24 city: GENEVE postcode: 1211 contact info Titolo: Dr. Nome: Alex Cognome: Waehry Email: send email Telefono: +41 22 379 75 60 Fax: +41 22 379 11 80	CH (GENEVE)	hostInstitution	1˙498˙579.00
2	UNIVERSITE DE GENEVE  Organization address address: Rue du General Dufour 24 city: GENEVE postcode: 1211 contact info Titolo: Prof. Nome: Roman Cognome: Ulm Email: send email Telefono: +41 22 3793650 Fax: +41 22 3793654	CH (GENEVE)	hostInstitution	1˙498˙579.00

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 Obiettivo del progetto (Objective)

'Ultraviolet-B (UV-B) is a key environmental signal that is specifically perceived by plants and promotes UV acclimation and survival in sunlight. We discovered recently that the Arabidopsis UVR8 protein is absolutely required for UV-B acclimation and functions as the major UV-B photoreceptor in plants: UVR8 dimer perception of UV-B photons leads to monomerization and direct interaction with the E3 ubiquitin ligase COP1, the central regulator of light signalling. We proposed that the initial UV-B perception step by the UVR8 photoreceptor involves the aromatic amino acid tryptophan as a chromophore. The UVR8 protein contains 14 tryptophans, localized mostly at the top of the predicted UVR8 beta-propeller structure. This hydrophobic surface is probably the surface through which UVR8 dimerizes, generating a tryptophan-rich “interphase” between the two monomers. Although it is clear from our combined genetic, physiological, molecular and biochemical data that UVR8 functions as the long-sought-after UV-B photoreceptor in plants, the mechanism of UV-B absorption and the immediate impact on the UVR8 protein and its interactors remains elusive. We would like to address this current major gap in photobiology in frame of the ERC project “UV-B Perception”. The proposed project will provide mechanistic insights into this newly discovered perception mechanism and photoreceptor pathway, which is of utmost importance for the survival of plants.'