Perception of UV-B by the Arabidopsis UVR8 protein.
Science
; 332(6025): 103-6, 2011 Apr 01.
Article
en En
| MEDLINE
| ID: mdl-21454788
ABSTRACT
To optimize their growth and survival, plants perceive and respond to ultraviolet-B (UV-B) radiation. However, neither the molecular identity of the UV-B photoreceptor nor the photoperception mechanism is known. Here we show that dimers of the UVR8 protein perceive UV-B, probably by a tryptophan-based mechanism. Absorption of UV-B induces instant monomerization of the photoreceptor and interaction with COP1, the central regulator of light signaling. Thereby this signaling cascade controlled by UVR8 mediates UV-B photomorphogenic responses securing plant acclimation and thus promotes survival in sunlight.
Texto completo:
1
Colección:
01-internacional
Base de datos:
MEDLINE
Asunto principal:
Rayos Ultravioleta
/
Proteínas Cromosómicas no Histona
/
Proteínas de Arabidopsis
Idioma:
En
Revista:
Science
Año:
2011
Tipo del documento:
Article
País de afiliación:
Alemania