Universität zu Köln

Sharma, Ashutosh ORCID: 0000-0002-9137-0888, Sharma, Bhavana, Hayes, Scott ORCID: 0000-0001-8943-6238, Kerner, Konstantin, Hoecker, Ute ORCID: 0000-0002-5636-9777, Jenkins, Gareth, I and Franklin, Keara A. (2019). UVR8 disrupts stabilisation of PIF5 by COP1 to inhibit plant stem elongation in sunlight. Nat. Commun., 10. LONDON: NATURE PUBLISHING GROUP. ISSN 2041-1723

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Abstract

Alterations in light quality significantly affect plant growth and development. In canopy shade, phytochrome photoreceptors perceive reduced ratios of red to far-red light (R:FR) and initiate stem elongation to enable plants to overtop competitors. This shade avoidance response is achieved via the stabilisation and activation of PHYTOCHROME INTERACTING FACTORs (PIFs) which elevate auxin biosynthesis. UV-B inhibits shade avoidance by reducing the abundance and activity of PIFs, yet the molecular mechanisms controlling PIF abundance in UV-B are unknown. Here we show that the UV-B photoreceptor UVR8 promotes rapid PIF5 degradation via the ubiquitin-proteasome system in a response requiring the N terminus of PIF5. In planta interactions between UVR8 and PIF5 are not observed. We further demonstrate that PIF5 interacts with the E3 ligase COP1, promoting PIF5 stabilisation in light-grown plants. Binding of UVR8 to COP1 in UV-B disrupts this stabilisation, providing a mechanism to rapidly lower PIF5 abundance in sunlight.

Item Type:	Journal Article
Creators:	Creators Email ORCID ORCID Put Code Sharma, Ashutosh UNSPECIFIED orcid.org/0000-0002-9137-0888 UNSPECIFIED Sharma, Bhavana UNSPECIFIED UNSPECIFIED UNSPECIFIED Hayes, Scott UNSPECIFIED orcid.org/0000-0001-8943-6238 UNSPECIFIED Kerner, Konstantin UNSPECIFIED UNSPECIFIED UNSPECIFIED Hoecker, Ute UNSPECIFIED orcid.org/0000-0002-5636-9777 UNSPECIFIED Jenkins, Gareth, I UNSPECIFIED UNSPECIFIED UNSPECIFIED Franklin, Keara A. UNSPECIFIED UNSPECIFIED UNSPECIFIED
URN:	urn:nbn:de:hbz:38-133606
DOI:	10.1038/s41467-019-12369-1
Journal or Publication Title:	Nat. Commun.
Volume:	10
Date:	2019
Publisher:	NATURE PUBLISHING GROUP
Place of Publication:	LONDON
ISSN:	2041-1723
Language:	English
Faculty:	Faculty of Mathematics and Natural Sciences
Divisions:	Faculty of Mathematics and Natural Sciences > Department of Biology > Botanical Institute
Subjects:	no entry
Uncontrolled Keywords:	Keywords Language SHADE AVOIDANCE-RESPONSE; RED-LIGHT; PHYTOCHROME-B; ARABIDOPSIS; GROWTH; DEGRADATION; PHOTOMORPHOGENESIS; PHOSPHORYLATION; PHOTORECEPTOR; TRANSCRIPTION Multiple languages Multidisciplinary Sciences Multiple languages
Refereed:	Yes
URI:	http://kups.ub.uni-koeln.de/id/eprint/13360