Differential phosphorylation of the N - terminal extension regulates phytochrome B signaling

Phytochrome B (phyB) is an excellent light quality and quantity sensor that can detect subtle changes in the light environment. The relative amounts of the biologically active photoreceptor (phyB Pfr) are determined by the light conditions and light independent thermal relaxation of Pfr into the ina...

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Detalles Bibliográficos
Otros Autores: Viczián, András, Ádám, Éva, Staudt, Anne Marie, Lambert, Dorothee, Klement, Eva, Romero Montepaone, Sofía, Hiltbrunner, Andreas, Casal, Jorge José
Formato: Artículo
Lenguaje:Inglés
Materias:
DARK REVERSION
PHOSPHORYLATION
PHYB NTE
PHYTOCHROME
THERMAL REVERSION
Acceso en línea:http://ri.agro.uba.ar/files/intranet/articulo/2020viczian.pdf
LINK AL EDITOR
Aporte de:Registro referencial: Solicitar el recurso aquí
Biblioteca Central (FAUBA) de Universidad de Buenos Aires
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024 |a 10.1111/nph.16243 
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245 1 0 |a Differential phosphorylation of the N - terminal extension regulates phytochrome B signaling 
520 |a Phytochrome B (phyB) is an excellent light quality and quantity sensor that can detect subtle changes in the light environment. The relative amounts of the biologically active photoreceptor (phyB Pfr) are determined by the light conditions and light independent thermal relaxation of Pfr into the inactive phyB Pr, termed thermal reversion. Little is known about the regulation of thermal reversion and how it affects plants’ light sensitivity. In this study we identified several serine/threonine residues on the N-terminal extension (NTE) of Arabidopsis thaliana phyB that are differentially phosphorylated in response to light and temperature, and examined transgenic plants expressing nonphosphorylatable and phosphomimic phyB mutants. The NTE of phyB is essential for thermal stability of the Pfr form, and phosphorylation of S86 particularly enhances the thermal reversion rate of the phyB Pfr–Pr heterodimer in vivo. We demonstrate that S86 phosphorylation is especially critical for phyB signaling compared with phosphorylation of the more N terminal residues. Interestingly, S86 phosphorylation is reduced in light, paralleled by a progressive Pfr stabilization under prolonged irradiation. By investigating other phytochromes (phyD and phyE) we provide evidence that acceleration of thermal reversion by phosphorylation represents a general mechanism for attenuating phytochrome signaling. 
650 |2 Agrovoc  |9 26 
653 |a DARK REVERSION 
653 |a PHOSPHORYLATION 
653 |a PHYB NTE 
653 |a PHYTOCHROME 
653 |a THERMAL REVERSION 
700 1 |a Viczián, András  |u Institute of Plant Biology. Biological Research Centre. Szeged, Hungary.  |9 70796 
700 1 |a Ádám, Éva  |u Institute of Plant Biology. Biological Research Centre. Szeged, Hungary.  |u University of Szeged. Department of Dermatology and Allergology. Institute of Translational Biomedicine. Szeged, Hungary.  |9 70797 
700 1 |a Staudt, Anne Marie  |u University of Freiburg. Institute of Biology II. Freiburg, Germany.  |9 70798 
700 1 |a Lambert, Dorothee  |u University of Freiburg. Institute of Biology II. Freiburg, Germany.  |9 70799 
700 1 |a Klement, Eva  |u Biological Research Centre. Laboratory of Proteomics Research. Szeged, Hungary.  |9 70800 
700 1 |9 70801  |a Romero Montepaone, Sofía  |u Universidad de Buenos Aires. Facultad de Agronomía. Instituto de Investigaciones Fisiológicas y Ecológicas Vinculadas a la Agricultura (IFEVA). Buenos Aires, Argentina.  |u CONICET – Universidad de Buenos Aires. Instituto de Investigaciones Fisiológicas y Ecológicas Vinculadas a la Agricultura (IFEVA). Buenos Aires, Argentina. 
700 1 |9 67612  |a Hiltbrunner, Andreas  |u University of Freiburg. Institute of Biology II. Freiburg, Germany.  |u University of Freiburg. Signalling Research Centres BIOSS and CIBSS. Freiburg, Germany. 
700 1 |9 792  |a Casal, Jorge José  |u Universidad de Buenos Aires. Facultad de Agronomía. Instituto de Investigaciones Fisiológicas y Ecológicas Vinculadas a la Agricultura (IFEVA). Buenos Aires, Argentina.  |u CONICET – Universidad de Buenos Aires. Instituto de Investigaciones Fisiológicas y Ecológicas Vinculadas a la Agricultura (IFEVA). Buenos Aires, Argentina.  |u CONICET. Fundación Instituto Leloir. Buenos Aires, Argentina. 
773 0 |t New phytologist  |w (AR-BaUFA)SECS001166  |g Vol.225, no.5 (2020), p.1635–1650, grafs. 
856 |f 2020viczian  |i en reservorio  |q application/pdf  |u http://ri.agro.uba.ar/files/intranet/articulo/2020viczian.pdf  |x ARTI202003 
856 |z LINK AL EDITOR  |u https://www.wiley.com/ 
942 |c ARTICULO 
942 |c ENLINEA 
976 |a AAG 

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