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Photomorphogenesis

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https://www.readbyqxmd.com/read/28584104/phosphorylation-and-negative-regulation-of-constitutively-photomorphogenic-1-by-pinoid-in-arabidopsis
#1
Fang Lin, Dongqing Xu, Yan Jiang, Haodong Chen, Liumin Fan, Magnus Holm, Xing Wang Deng
CONSTITUTIVELY PHOTOMORPHOGENIC 1 (COP1) plays crucial roles in various cellular processes via its E3 ubiquitin ligase activity in organisms, ranging from fungi to humans. As a key component in regulating various biological events, COP1 itself is precisely controlled at multiple layers. Here, we report a negative regulator of COP1, PINOID (PID), which positively mediates photomorphogenic development. Specifically, PID genetically and physically interacts with COP1 and directly phosphorylates COP1 at Ser20. As a result, this posttranslational modification serves to repress COP1 activity and promote photomorphogenesis...
June 20, 2017: Proceedings of the National Academy of Sciences of the United States of America
https://www.readbyqxmd.com/read/28580356/fungal-histidine-phosphotransferase-plays-a-crucial-role-in-photomorphogenesis-and-pathogenesis-in-magnaporthe-oryzae
#2
Varsha C Mohanan, Pinal M Chandarana, Bharat B Chattoo, Rajesh N Patkar, Johannes Manjrekar
Two-component signal transduction (TCST) pathways play crucial roles in many cellular functions such as stress responses, biofilm formation, and sporulation. The histidine phosphotransferase (HPt), which is an intermediate phosphotransfer protein in a two-component system, transfers a phosphate group to a phosphorylatable aspartate residue in the target protein(s), and up-regulates stress-activated MAP kinase cascades. Most fungal genomes carry a single copy of the gene coding for HPt, which are potential antifungal targets...
2017: Frontiers in Chemistry
https://www.readbyqxmd.com/read/28559907/shb1-hy1-alleviates-excess-boron-stress-by-increasing-bor4-expression-level-and-maintaining-boron-homeostasis-in-arabidopsis-roots
#3
Qiang Lv, Lei Wang, Jin-Zheng Wang, Peng Li, Yu-Li Chen, Jing Du, Yi-Kun He, Fang Bao
Boron is an essential mineral nutrient for higher plant growth and development. However, excessive amounts of boron can be toxic. Here, we report on the characterization of an Arabidopsis mutant, shb1 (sensitive to high-level of boron 1), which exhibits hypersensitivity to excessive boron in roots. Positional cloning demonstrated that the shb1 mutant bears a point mutation in a gene encoding a heme oxygenase 1 (HO1) corresponding to the HY1 gene involved in photomorphogenesis. The transcription level of the SHB1/HY1 gene in roots is up-regulated under excessive boron stimulation...
2017: Frontiers in Plant Science
https://www.readbyqxmd.com/read/28552939/genome-wide-survey-of-b-box-proteins-in-potato-solanum-tuberosum-identification-characterization-and-expression-patterns-during-diurnal-cycle-etiolation-and-de-etiolation
#4
Urszula Talar, Agnieszka Kiełbowicz-Matuk, Jagoda Czarnecka, Tadeusz Rorat
Plant B-box domain proteins (BBX) mediate many light-influenced developmental processes including seedling photomorphogenesis, seed germination, shade avoidance and photoperiodic regulation of flowering. Despite the wide range of potential functions, the current knowledge regarding BBX proteins in major crop plants is scarce. In this study, we identify and characterize the StBBX gene family in potato, which is composed of 30 members, with regard to structural properties and expression profiles under diurnal cycle, etiolation and de-etiolations...
2017: PloS One
https://www.readbyqxmd.com/read/28536102/spa-proteins-affect-the-subcellular-localization-of-cop1-in-the-cop1-spa-ubiquitin-ligase-complex-during-photomorphogenesis
#5
Martin Balcerowicz, Konstantin Kerner, Christian Schenkel, Ute Hoecker
The Arabidopsis COP1/SPA ubiquitin ligase is a central repressor which suppresses light signaling in darkness by targeting positive regulators of the light response, mainly transcription factors, for degradation. Light inactivates COP1/SPA, in part by excluding COP1 from the nucleus. SPA proteins are essential cofactors of COP1, but their exact role in the COP1/SPA complex is thus far unknown. To unravel a potential role of SPA proteins in COP1 nucleocytoplasmic partitioning, we monitored the subcellular localization of COP1 in a spa1234 quadruple mutant (spaQn)...
May 23, 2017: Plant Physiology
https://www.readbyqxmd.com/read/28516036/transcriptome-analysis-of-carica-papaya-embryogenic-callus-upon-de-etiolated-1-det1-gene-suppression
#6
Diyana Jamaluddin, Normah Mohd Noor, Hoe-Han Goh
Papaya is considered to be one of the most nutritional fruits. It is rich in vitamins, carotenoids, flavonoids and other phytonutrient which function as antioxidant in our body [1]. Previous studies revealed that the suppression of a negative regulator gene in photomorphogenesis, De-etiolated 1 (DET1) can improve the phytonutrient in tomato and canola without affecting the fruit quality [2], [3]. This report contains the experimental data on high-throughput 3' mRNA sequencing of transformed papaya callus upon DET1 gene suppression...
June 2017: Genomics Data
https://www.readbyqxmd.com/read/28500697/light-induced-conformational-changes-in-the-plant-cryptochrome-photolyase-homology-region-resolved-by-selective-isotope-labeling-and-infrared-spectroscopy
#7
Constanze Sommer, Marina S Dietz, Thomas Patschkowski, Tilo Mathes, Tilman Kottke
Plant cryptochromes are photoreceptors that regulate flowering, circadian rhythm and photomorphogenesis in response to blue and UV-A light. It has been demonstrated that the oxidized flavin cofactor is photoreduced to the neutral radical state via separate electron and proton transfer. Conformational changes have been found in the C-terminal extension, but few studies have addressed the changes in secondary structure in the sensory photolyase homology region (PHR). Here, we investigated the PHR of the plant cryptochrome from the green alga Chlamydomonas reinhardtii by light-induced infrared difference spectroscopy in combination with global (13) C and (15) N isotope labeling...
May 2017: Photochemistry and Photobiology
https://www.readbyqxmd.com/read/28500288/light-perception-in-aerial-tissues-enhances-dwf4-accumulation-in-root-tips-and-induces-root-growth
#8
Jun Sakaguchi, Yuichiro Watanabe
Many attempts have been made to characterize the activities of brassinosteroids (BRs), which are important plant hormones. The crosstalk between light perception and the BR signalling pathway has been extensively studied regarding its effects on photomorphogenesis, especially in elongating etiolated hypocotyls. In contrast, how and where the light induces BR biosynthesis remain uncharacterized. DWF4 is one of the main enzymes involved in the BR biosynthesis pathway in Arabidopsis thaliana. We established DWF4-GUS A...
May 12, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28461270/mass-spectrometric-analyses-reveal-a-central-role-for-ubiquitylation-in-remodeling-the%C3%A2-arabidopsis-proteome-during-photomorphogenesis
#9
Victor Aguilar-Hernández, Do-Young Kim, Robert J Stankey, Mark Scalf, Lloyd M Smith, Richard D Vierstra
The switch from skotomorphogenesis to photomorphogenesis is a key developmental transition in the life of seed plants. While much of the underpinning proteome remodeling is driven by light-induced changes in gene expression, the proteolytic removal of specific proteins by the ubiquitin-26S proteasome system is also likely paramount. Through mass spectrometric analysis of ubiquitylated proteins affinity-purified from etiolated Arabidopsis seedlings before and after red-light irradiation, we identified a number of influential proteins whose ubiquitylation status is modified during this switch...
June 5, 2017: Molecular Plant
https://www.readbyqxmd.com/read/28437590/plant-dual-specificity-tyrosine-phosphorylation-regulated-kinase-optimizes-light-regulated-growth-and-development-in-arabidopsis
#10
Wen-Yu Huang, Yi-Chen Wu, Hsin-Yi Pu, Ying Wang, Geng-Jen Jang, Shu-Hsing Wu
Light controls vegetative and reproductive development of plants. For a plant, sensing the light input properly ensures coordination with the ever-changing environment. Previously, we found that LIGHT-REGULATED WD1 (LWD1) and LWD2 regulate the circadian clock and photoperiodic flowering. Here we identified Arabidopsis YET ANOTHER KINASE1 (AtYAK1), an evolutionarily conserved protein and a member of dual-specificity tyrosine phosphorylation-regulated kinases (DYRKs), as an interacting protein of LWDs. Our study revealed that AtYAK1 is an important regulator for various light responses, including the circadian clock, photomorphogenesis and reproductive development...
April 24, 2017: Plant, Cell & Environment
https://www.readbyqxmd.com/read/28433946/the-activities-of-the-e3-ubiquitin-ligase-cop1-spa-a-key-repressor-in-light-signaling
#11
REVIEW
Ute Hoecker
Light is a critical signal to integrate plant growth and development with the environment. Downstream of photoreceptors, the E3 ubiquitin ligase COP1/SPA is a key repressor of photomorphogenesis which targets many positive regulators of light signaling, mainly transcription factors, for degradation in darkness. In light-grown plants COP1/SPA activity is repressed, allowing light responses to occur. This review provides an overview on our current knowledge on COP1/SPA repressor function, focusing in particular on the roles of the respective protein domains and the mechanisms of light-induced inactivation of COP1/SPA...
April 20, 2017: Current Opinion in Plant Biology
https://www.readbyqxmd.com/read/28426369/hos1-acts-as-a-key-modulator-of-hypocotyl-photomorphogenesis
#12
Ju-Heon Kim, Hyo-Jun Lee, Chung-Mo Park
Plants recognize light as an environmental signal to determine the proper timing of growth and development. In Arabidopsis seedlings, hypocotyl growth is promoted in the dark but suppressed in the light. It is known that the red/far-red light-sensing receptor phytochrome B (phyB) suppresses the function of PHYTOCHROME INTERACTING FACTOR (PIF) transcription factors, which act as photomorphogenic repressors. However, molecular mechanisms underlying the phyB-mediated inhibition of PIF functioning remain unclear...
April 20, 2017: Plant Signaling & Behavior
https://www.readbyqxmd.com/read/28420710/reciprocal-proteasome-mediated-degradation-of-pifs-and-hfr1-underlies-photomorphogenic-development-in-arabidopsis
#13
Xiaosa Xu, Praveen Kumar Kathare, Vinh Ngoc Pham, Qingyun Bu, Andrew Nguyen, Enamul Huq
The phytochrome-mediated regulation of photomorphogenesis under red and far-red light conditions involves both positively and negatively acting factors. The positively acting factors (e.g. HY5/HFR1/LAF1 and others) are degraded in the dark to prevent photomorphogenesis. By contrast, the negatively acting factors (e.g. phytochrome-interacting factors or PIFs) are degraded in response to light to promote photomorphogenesis. Here, we show that the negatively acting factor PIF1 is also degraded in the dark by direct heterodimerization with the positively acting factor HFR1...
May 15, 2017: Development
https://www.readbyqxmd.com/read/28418582/cop1-conveys-warm-temperature-information-to-hypocotyl-thermomorphogenesis
#14
Young-Joon Park, Hyo-Jun Lee, Jun-Ho Ha, Jae Young Kim, Chung-Mo Park
Plants adjust their architecture to optimize growth and reproductive success under changing climates. Hypocotyl elongation is a pivotal morphogenic trait that is profoundly influenced by light and temperature conditions. While hypocotyl photomorphogenesis has been well characterized at the molecular level, molecular mechanisms underlying hypocotyl thermomorphogenesis remains elusive. Here, we demonstrate that the E3 ubiquitin ligase CONSTITUTIVE PHOTOMORPHOGENIC 1 (COP1) conveys warm temperature signals to hypocotyl thermomorphogenesis...
April 18, 2017: New Phytologist
https://www.readbyqxmd.com/read/28391049/light-regulation-of-pigment-and-photosystem-biosynthesis-in-cyanobacteria
#15
REVIEW
Ming-Yang Ho, Nathan T Soulier, Daniel P Canniffe, Gaozhong Shen, Donald A Bryant
Most cyanobacteria are obligate oxygenic photoautotrophs, and thus their growth and survival is highly dependent on effective utilization of incident light. Cyanobacteria have evolved a diverse set of phytochromes and cyanobacteriochromes (CBCRs) that allow cells to respond to light in the range from ∼300nm to ∼750nm. Together with associated response regulators, these photosensory proteins control many aspects of cyanobacterial physiology and metabolism. These include far-red light photoacclimation (FaRLiP), complementary chromatic acclimation (CCA), low-light photoacclimation (LoLiP), photosystem content and stoichiometry (long-term adaptation), short-term acclimation (state transitions), circadian rhythm, phototaxis, photomorphogenesis/development, and cellular aggregation...
April 6, 2017: Current Opinion in Plant Biology
https://www.readbyqxmd.com/read/28391048/seeing-new-light-recent-insights-into-the-occurrence-and-regulation-of-chromatic-acclimation-in-cyanobacteria
#16
REVIEW
Beronda L Montgomery
Cyanobacteria exhibit a form of photomorphogenesis termed chromatic acclimation (CA), which involves tuning metabolism and physiology to external light cues, with the most readily recognized acclimation being the alteration of pigmentation. Historically, CA has been represented by three types that occur in organisms which synthesize green-light-absorbing phycoerythrin (PE) and red-light-absorbing phycocyanin (PC). The distinct CA types depend upon whether organisms adjust levels of PE (type II), both PE and PC (type III, also complementary chromatic acclimation), or neither (type I) in response to red or green wavelengths...
April 6, 2017: Current Opinion in Plant Biology
https://www.readbyqxmd.com/read/28342864/oslbd37-and-oslbd38-two-class-ii-type-lbd-proteins-are-involved-in-the-regulation-of-heading-date-by-controlling-the-expression-of-ehd1-in-rice
#17
Chaonan Li, Shanshan Zhu, Huan Zhang, Liping Chen, Maohong Cai, Jiachang Wang, Juntao Chai, Fuqing Wu, Zhijun Cheng, Xiuping Guo, Xin Zhang, Jianmin Wan
LATERAL ORGAN BOUNDARIES DOMAIN (LBD) proteins are plant-specific transcription factors which are involved in many biological process of plant development, including lateral organ development, photomorphogenesis, pathogen response, pollen development and plant regeneration. Here, we report new functions of LBD proteins that participate in the regulation of heading date and yield in rice. OsLBD37 and OsLBD38 are two class II type LBD proteins, function as transcriptional activators. Overexpression of OsLBD37 and OsLBD38 separately causes delayed heading date and increased yield...
May 6, 2017: Biochemical and Biophysical Research Communications
https://www.readbyqxmd.com/read/28321936/jasmonate-inhibits-cop1-activity-to-suppress-hypocotyl-elongation-and-promote-cotyledon-opening-in-etiolated-arabidopsis-seedlings
#18
Yuyu Zheng, Xuefei Cui, Liang Su, Shuang Fang, Jinfang Chu, Qingqiu Gong, Jianping Yang, Ziqiang Zhu
A germinating seedling undergoes skotomorphogenesis to emerge from the soil and reach for light. During this phase, the cotyledons are closed, and the hypocotyl elongates. Upon exposure to light, the seedling rapidly switches to photomorphogenesis by opening its cotyledons and suppressing hypocotyl elongation. The E3 ubiquitin ligase CONSTITUTIVE PHOTOMORPHOGENIC 1 (COP1) is critical for maintaining skotomorphogenesis. Here, we report that jasmonate (JA) suppresses hypocotyl elongation and stimulates cotyledon opening in etiolated seedlings, partially phenocopying cop1 mutants in the dark...
June 2017: Plant Journal: for Cell and Molecular Biology
https://www.readbyqxmd.com/read/28292897/inhibition-of-atherogenesis-by-the-cop9-signalosome-subunit-5-in-vivo
#19
Yaw Asare, Miriam Ommer, Florence A Azombo, Setareh Alampour-Rajabi, Marieke Sternkopf, Maryam Sanati, Marion J Gijbels, Corinna Schmitz, Dzmitry Sinitski, Pathricia V Tilstam, Hongqi Lue, André Gessner, Denise Lange, Johannes A Schmid, Christian Weber, Martin Dichgans, Joachim Jankowski, Ruggero Pardi, Menno P J de Winther, Heidi Noels, Jürgen Bernhagen
Constitutive photomorphogenesis 9 (COP9) signalosome 5 (CSN5), an isopeptidase that removes neural precursor cell-expressed, developmentally down-regulated 8 (NEDD8) moieties from cullins (thus termed "deNEDDylase") and a subunit of the cullin-RING E3 ligase-regulating COP9 signalosome complex, attenuates proinflammatory NF-κB signaling. We previously showed that CSN5 is up-regulated in human atherosclerotic arteries. Here, we investigated the role of CSN5 in atherogenesis in vivo by using mice with myeloid-specific Csn5 deletion...
March 28, 2017: Proceedings of the National Academy of Sciences of the United States of America
https://www.readbyqxmd.com/read/28292892/noncanonical-role-of-arabidopsis-cop1-spa-complex-in-repressing-bin2-mediated-pif3-phosphorylation-and-degradation-in-darkness
#20
Jun-Jie Ling, Jian Li, Danmeng Zhu, Xing Wang Deng
The E3 ligase CONSTITUTIVELY PHOTOMORPHOGENIC 1 (COP1) has been known to mediate key signaling factors for degradation via the ubiquitin/26S proteasome pathway in both plants and animals. Here, we report a noncanonical function of Arabidopsis COP1, the central repressor of photomorphogenesis, in the form of a COP1/ SUPPRESSOR of phyA-105 (SPA) complex. We show that the COP1/SPA complex associates with and stabilizes PHYTOCHROME INTERACTING FACTOR 3 (PIF3) to repress photomorphogenesis in the dark. We identify the GSK3-like kinase BRASSINOSTEROID-INSENSITIVE 2 (BIN2) as a kinase of PIF3, which induces PIF3 degradation via 26S proteasome during skotomorphogenesis...
March 28, 2017: Proceedings of the National Academy of Sciences of the United States of America
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