Ethylene-independent promotion of photomorphogenesis in the dark by cytokinin requires COP1 and the CDD complex [PDF]
, 2019 The transition of skotomorphogenesis to photomorphogenesis is induced by the perception of light, and is characterized by the inhibition of hypocotyl elongation and opening of cotyledons.
Cortleven, Anne +3 more
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New insights into the mechanisms of phytochrome-cryptochrome coaction. [PDF]
, 2018 Contents Summary 547 I. Introduction 547 II. Phytochromes mediate light-induced transcription of BICs to inactivate cryptochromes 548 III. PPKs phosphorylate light-signaling proteins and histones to affect plant development 548 IV.
Ahmad +47 more
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A cop1 spa Mutant Deficient in COP1 and SPA Proteins Reveals Partial Co-Action of COP1 and SPA during Arabidopsis Post-Embryonic Development and Photomorphogenesis [PDF]
Molecular Plant, 2015 The Arabidopsis CONSTITUTIVELY PHOTOMORPHOGENIC1/SUPPRESSOR OF PHYA-105 (COP1/SPA) complex is a key repressor of light signaling that inhibits light responses in darkness. It acts as an E3 ubiquitin ligase, which ubiquitinates positively acting light-signaling intermediates, mainly transcription factors, thereby targeting them for proteolytic ...
Ordonez-Herrera, N. +5 more
openaire +3 more sources
Multiple roles for UV RESISTANCE LOCUS8 in regulating gene expression and metabolite accumulation in arabidopsis under solar ultraviolet radiation [PDF]
, 2013 Photomorphogenic responses triggered by low fluence rates of ultraviolet B radiation (UV-B; 280–315 nm) are mediated by the UV-B photoreceptor UV RESISTANCE LOCUS8 (UVR8).
Aphalo, P.J. +9 more
core +1 more source
BMC Plant Biology, 2021 Background In plants, CONSTITUTIVELY PHOTOMORPHOGENIC 1 (COP1) is a key negative regulator in photoperiod response. However, the biological function of COP1-interacting protein 1 (CIP1) and the regulatory mechanism of the CIP1-COP1 interaction are not ...
Hui Kang +6 more
doaj +1 more source
A CRY-BIC negative-feedback circuitry regulating blue light sensitivity of Arabidopsis. [PDF]
, 2017 Cryptochromes are blue light receptors that regulate various light responses in plants. Arabidopsis cryptochrome 1 (CRY1) and cryptochrome 2 (CRY2) mediate blue light inhibition of hypocotyl elongation and long-day (LD) promotion of floral initiation. It
Gu, Lianfeng +15 more
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Frontiers in Plant Science, 2016 Ubiquitination and sumoylation are essential post-translational modifications that regulate growth and development processes in plants, including control of hormone signaling mechanisms and responses to stress.
Joo Yong Kim, In-Cheol Jang, Hak Soo Seo
doaj +1 more source
Light-dependent regulation of DEL1 is determined by the antagonistic action of E2Fb and E2Fc [PDF]
, 2011 Endoreduplication represents a variation on the cell cycle in which multiple rounds of DNA replication occur without subsequent chromosome separation and cytokinesis, thereby increasing the cellular DNA content.
Berckmans, Barbara +5 more
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Aging, 2015 The association of COP9 signalosome (CSN) with Constitutive Photomorphogenic 1 (COP1) was characterized in plants for a role in photomorpho-genesis. However, since mammalian cells do not perform photomorphogenesis, roles of these two proteins remain enigmatic. Recently we began to unravel their roles in oncogenesis.
Hyun Ho, Choi, Mong-Hong, Lee
openaire +2 more sources
Cryptochrome 2 competes with COP1 substrates to repress COP1 ubiquitin ligase activity during Arabidopsis photomorphogenesis [PDF]
Proceedings of the National Academy of Sciences, 2019 Significance Plants adapt their growth and development to ambient light conditions by modulating the activity of the COP1/SPA ubiquitin ligase. In Arabidopsis , photoactivated cryptochromes interact directly with COP1/SPA to suppress the activity of COP1 in blue light.
Jathish Ponnu +4 more
openaire +2 more sources