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Light-inducible protein

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https://www.readbyqxmd.com/read/28437590/plant-dual-specificity-tyrosine-phosphorylation-regulated-kinase-optimizes-light-regulated-growth-and-development-in-arabidopsis
#1
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/28436983/stable-polycomb-dependent-transgenerational-inheritance-of-chromatin-states-in-drosophila
#2
Filippo Ciabrelli, Federico Comoglio, Simon Fellous, Boyan Bonev, Maria Ninova, Quentin Szabo, Anne Xuéreb, Christophe Klopp, Alexei Aravin, Renato Paro, Frédéric Bantignies, Giacomo Cavalli
Transgenerational epigenetic inheritance (TEI) describes the transmission of alternative functional states through multiple generations in the presence of the same genomic DNA sequence. Very little is known about the principles and the molecular mechanisms governing this type of inheritance. Here, by transiently enhancing 3D chromatin interactions, we established stable and isogenic Drosophila epilines that carry alternative epialleles, as defined by differential levels of Polycomb-dependent trimethylation of histone H3 Lys27 (forming H3K27me3)...
April 24, 2017: Nature Genetics
https://www.readbyqxmd.com/read/28436325/photoperiodic-responses-and-characterization-of-the-cmvvd-gene-encoding-a-blue-light-photoreceptor-from-the-medicinal-caterpillar-fungus-cordyceps-militaris-ascomycetes
#3
Xin Zhang, Xiaoming Dong, Xinhua Song, Fen Wang, Caihong Dong
Light is a necessary environmental factor for production of conidia and pigment, formation of stroma, and development of Cordyceps militaris, a well-known edible and medicinal mushroom. In this study, an obvious rhythm loop was observed in certain strains of C. militaris under conditions of alternating 12-hour intervals of dark and light. A possibly related gene, Cmvvd, the homologue of the blue-light photoreceptor of Neurospora crassa, was cloned from the genome of C. militaris. The protein CmVVD is predicted to be 203 amino acids in length and is characterized by the presence of a light, oxygen, or voltage domain...
2017: International Journal of Medicinal Mushrooms
https://www.readbyqxmd.com/read/28434813/rhythmic-expressed-clock-regulates-the-transcription-of-proliferating-cellular-nuclear-antigen-in-teleost-retina
#4
Hang Song, Defeng Wang, Felipe De Jesus Perez, Rongrong Xie, Zhipeng Liu, Chun-Chun Chen, Meijuan Yu, Liudi Yuan, Russell D Fernald, Sheng Zhao
Teleost fish continues to grow their eyes throughout life with the body size. In Astatotilapia burtoni, the fish retina increases by adding new retinal cells at the ciliary marginal zone (CMZ) and in the outer nuclear layer (ONL). Cell proliferation at both sites exhibits a daily rhythm in number of dividing cells. To understand how this diurnal rhythm of new cell production is controlled in retinal progenitor cells, we studied the transcription pattern of clock genes in retina, including clock1a, clock1b, bmal1a (brain and muscle ARNT-Like), and per1b (period1b)...
April 20, 2017: Experimental Eye Research
https://www.readbyqxmd.com/read/28433946/the-activities-of-the-e3-ubiquitin-ligase-cop1-spa-a-key-repressor-in-light-signaling
#5
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/28433567/ppar-%C3%AE-agonist-rosiglitazone-reduces-autophagy-and-promotes-functional-recovery-in-experimental-traumaticspinal-cord-injury
#6
Hongpeng Li, Qin Zhang, Xiaohui Yang, Liping Wang
BACKGROUND: Secondary damage is often more important in determining the functional outcome and provides a practical target for therapeutic intervention. Rosiglitazone (ROSG) is a potent PPAR-γ agonist and has been shown to induce neuroprotection in animal models of spinal cord injury (SCI). However, it is still unclear whether this PPAR-γ agonist can mediate neuronal autophagy after SCI. METHODS: SCI was induced by application of vascular clips (force of 24g) to the dura via a four-level T5-T8 laminectomy...
April 19, 2017: Neuroscience Letters
https://www.readbyqxmd.com/read/28433003/the-plastid-outer-membrane-localized-lptd1-is-important-for-glycerolipid-remodeling-under-phosphate-starvation
#7
Yi-Ching Hsueh, Christian Ehmann, Nadine Flinner, Roman Ladig, Enrico Schleiff
Glycerolipid synthesis in plants is coordinated between plastids and the endoplasmic reticulum (ER). A central step within the glycerolipid synthesis is the transport of phosphatidic acid from ER to chloroplasts. The chloroplast outer envelope protein TGD4 belongs to the LptD family conserved in bacteria and plants and selectively binds and may transports phosphatidic acid. We describe a second LptD-family protein in A. thaliana (atLPTD1; At2g44640) characterized by a barrel domain with an amino acid signature typical for cyanobacterial LptDs...
April 22, 2017: Plant, Cell & Environment
https://www.readbyqxmd.com/read/28432258/lil3-a-light-harvesting-complex-protein-links-terpenoid-and-tetrapyrrole-biosynthesis
#8
Daniel Hey, Maxi Rothbart, Josephine Herbst, Peng Wang, Jakob Müller, Daniel Wittmann, Kirsten Gruhl, Bernhard Grimm
LIL3 of Arabidopsis thaliana belongs to the light-harvesting complex (LHC) family, which also includes the light-harvesting chlorophyll-binding proteins of photosystems 1 and 2, the early-light-inducible proteins, PsbS involved in non-photochemical quenching, the one-helix-proteins and their cyanobacterial homologs designated high-light-inducible proteins. Each member of this family is characterized by one or two LHC transmembrane domains (referred to as the LHC motif) to which potential functions such as chlorophyll binding, protein interaction and integration of interacting partners into the plastid membranes have been attributed...
April 21, 2017: Plant Physiology
https://www.readbyqxmd.com/read/28431041/bidirectional-approaches-for-optogenetic-regulation-of-gene-expression-in-mammalian-cells-using-arabidopsis-cryptochrome-2
#9
Gopal P Pathak, Jessica I Spiltoir, Camilla Höglund, Lauren R Polstein, Sari Heine-Koskinen, Charles A Gersbach, Jari Rossi, Chandra L Tucker
Optogenetic tools allow regulation of cellular processes with light, which can be delivered with spatiotemporal resolution. In previous work, we used cryptochrome 2 (CRY2) and CIB1, Arabidopsis proteins that interact upon light illumination, to regulate transcription with light in yeast. While adopting this approach to regulate transcription in mammalian cells, we observed light-dependent redistribution and clearing of CRY2-tethered proteins within the nucleus. The nuclear clearing phenotype was dependent on the presence of a dimerization domain contained within the CRY2-fused transcriptional activators...
April 20, 2017: Nucleic Acids Research
https://www.readbyqxmd.com/read/28429726/verteporfin-induced-formation-of-protein-cross-linked-oligomers-and-high-molecular-weight-complexes-is-mediated-by-light-and-leads-to-cell-toxicity
#10
Eleni K Konstantinou, Shoji Notomi, Cassandra Kosmidou, Katarzyna Brodowska, Ahmad Al-Moujahed, Fotini Nicolaou, Pavlina Tsoka, Evangelos Gragoudas, Joan W Miller, Lucy H Young, Demetrios G Vavvas
Verteporfin (VP) was first used in Photodynamic therapy, where a non-thermal laser light (689 nm) in the presence of oxygen activates the drug to produce highly reactive oxygen radicals, resulting in local cell and tissue damage. However, it has also been shown that Verteporfin can have non-photoactivated effects such as interference with the YAP-TEAD complex of the HIPPO pathway, resulting in growth inhibition of several neoplasias. More recently, it was proposed that, another non-light mediated effect of VP is the formation of cross-linked oligomers and high molecular weight protein complexes (HMWC) that are hypothesized to interfere with autophagy and cell growth...
April 21, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28429325/gravitaxis-in-euglena
#11
Donat-P Häder, Ruth Hemmersbach
Motile microorganisms utilize a number of responses to external stimuli including light, temperature, chemicals as well as magnetic and electric fields. Gravity is a major clue to select a niche in their environment. Positive gravitaxis leads an organism down into the water column and negative gravitaxis brings it to the surface. In Euglena the precision of gravitaxis is regulated by an internal rhythm entrained by the daily light/dark cycle. This and the cooperation with phototaxis bring the cells into an optimal position in the water column...
2017: Advances in Experimental Medicine and Biology
https://www.readbyqxmd.com/read/28429322/photo-and-nutritional-regulation-of-euglena-organelle-development
#12
Steven D Schwartzbach
Euglena can use light and CO2, photosynthesis, as well as a large variety of organic molecules as the sole source of carbon and energy for growth. Light induces the enzymes, in this case an entire organelle, the chloroplast, that is required to use CO2 as the sole source of carbon and energy for growth. Ethanol, but not malate, inhibits the photoinduction of chloroplast enzymes and induces the synthesis of the glyoxylate cycle enzymes that comprise the unique metabolic pathway leading to two carbon, ethanol and acetate, assimilation...
2017: Advances in Experimental Medicine and Biology
https://www.readbyqxmd.com/read/28428249/crystal-structure-and-redox-properties-of-a-novel-cyanobacterial-heme-protein-with-a-his-cys-heme-axial-ligation-and-a-per-arnt-sim-pas-like-domain
#13
Taiki Motomura, Michihiro Suga, Rainer Hienerwadel, Akiko Nakagawa, Thanh-Lan Lai, Wolfgang Nitschke, Takahiro Kuma, Miwa Sugiura, Alain Boussac, Jain-Ren Shen
Photosystem II (PSII) catalyzes the light-induced water oxidation leading to the generation of dioxygen indispensable for sustaining aerobic life on Earth. The PSII reaction center is composed of D1 and D2 proteins encoded by the psbA and psbD genes, respectively. In cyanobacteria, different psbA genes are present in the genome. The thermophilic cyanobacterium Thermosynechococcus elongatus contains 3 psbA genes, psbA1, psbA2 and psbA3 and a new c-type heme protein, Tll0287, was found to be expressed in a strain expressing the psbA2 gene only, but the structure and function of Tll0287 are unknown...
April 20, 2017: Journal of Biological Chemistry
https://www.readbyqxmd.com/read/28428216/maturation-of-platelet-function-during-murine-fetal-development-in-vivo
#14
Andreas Margraf, Claudia Nussbaum, Ina Rohwedder, Sarah Klapproth, Angela R M Kurz, Annamaria Florian, Volker Wiebking, Joachim Pircher, Monika Pruenster, Roland Immler, Steffen Dietzel, Ludmila Kremer, Friedemann Kiefer, Markus Moser, Andreas W Flemmer, Elizabeth Quackenbush, Ulrich H von Andrian, Markus Sperandio
OBJECTIVE: Platelet function has been intensively studied in the adult organism. However, little is known about the function and hemostatic capacity of platelets in the developing fetus as suitable in vivo models are lacking. APPROACH AND RESULTS: To examine fetal platelet function in vivo, we generated a fetal thrombosis model and investigated light-/dye-induced thrombus formation by intravital microscopy throughout gestation. We observed that significantly less and unstable thrombi were formed at embryonic day (E) 13...
April 20, 2017: Arteriosclerosis, Thrombosis, and Vascular Biology
https://www.readbyqxmd.com/read/28427888/dopamine-elevates-intracellular-zinc-concentration-in-cultured-rat-embryonic-cortical-neurons-through-the-camp-nitric-oxide-signaling-cascade
#15
Hui-Hsing Hung, Lung-Sen Kao, Pei-Shan Liu, Chien-Chang Huang, De-Ming Yang, Chien-Yuan Pan
Zinc ion (Zn(2+)), the second most abundant transition metal after iron in the body, is essential for neuronal activity and also induces toxicity if the concentration is abnormally high. Our previous results show that exposure of cultured cortical neurons to dopamine elevates intracellular Zn(2+) concentrations ([Zn(2+)]i) and induces autophagosome formation but the mechanism is not clear. In this study, we characterized the signaling pathway responsible for the dopamine-induced elevation of [Zn(2+)]i and the effect of [Zn(2+)]i in modulating the autophagy in cultured rat embryonic cortical neurons...
April 17, 2017: Molecular and Cellular Neurosciences
https://www.readbyqxmd.com/read/28427618/effects-of-high-intensity-unltrasound-on-structural-and-physicochemical-properties-of-myosin-from-silver-carp
#16
Ru Liu, Qing Liu, Shanbai Xiong, Yicheng Fu, Liang Chen
Myosin from silver carp was sonicated with varying power output (100, 150, 200 and 250W) for 3, 6, 9, and 12min. The changes in the structure and physicochemical properties of myosin were evaluated by dynamic light scattering, SDS-PAGE and some physicochemical indexes. The ultrasound treatments induced a significant conversion of myosin aggregates to smaller ones with a more uniform distribution, and obvious enhancement in solubility. The structure of myosin was also notably changed by sonication, with a decrease in Ca(2+)-ATPase activity and SH content, and an increase in surface hydrophobicity...
July 2017: Ultrasonics Sonochemistry
https://www.readbyqxmd.com/read/28427560/stress-adaptive-response-in-ovarian-cancer-drug-resistance-role-of-trap1-in-oxidative-metabolism-driven-inflammation
#17
Maria Rosaria Amoroso, Danilo Swann Matassa, Ilenia Agliarulo, Rosario Avolio, Francesca Maddalena, Valentina Condelli, Matteo Landriscina, Franca Esposito
Metabolic reprogramming is one of the most frequent stress-adaptive response of cancer cells to survive environmental changes and meet increasing nutrient requirements during their growth. These modifications involve cellular bioenergetics and cross talk with surrounding microenvironment, in a dynamic network that connect different molecular processes, such as energy production, inflammatory response, and drug resistance. Even though the Warburg effect has long been considered the main metabolic feature of cancer cells, recent reports identify mitochondrial oxidative metabolism as a driving force for tumor growth in an increasing number of cellular contexts...
2017: Advances in Protein Chemistry and Structural Biology
https://www.readbyqxmd.com/read/28427045/mir-142-3p-overexpression-increases-chemo-sensitivity-of-nsclc-by-inhibiting-hmgb1-mediated-autophagy
#18
Yuqing Chen, Xin Zhou, Jianou Qiao, Aihua Bao
BACKGROUND: Non-small-cell lung cancer (NSCLC) is a deadly cancer with high mortality rate. Drug resistance represents a main obstacle in NSCLC treatment. High mobility group box-1 (HMGB1) protein promotes drug resistance in NSCLC cells by activating protective autophagy. METHODS: In the current study, we investigated the regulatory role of microRNA-142-3p (miR-142-3p) in HMGB1-mediated autophagy of NSCLC cells and its impact on drug resistance of NSCLC in vitro and in vivo...
March 16, 2017: Cellular Physiology and Biochemistry
https://www.readbyqxmd.com/read/28426369/hos1-acts-as-a-key-modulator-of-hypocotyl-photomorphogenesis
#19
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/28425985/the-cellular-senescence-of-leukemia-initiating-cells-from-acute-lymphoblastic-leukemia-is-postponed-by-%C3%AE-arrestin1-binding-with-p300-sp1-to-regulate-htert-transcription
#20
Shan Liu, Haiyan Liu, Ru Qin, Yi Shu, Zhidai Liu, Penghui Zhang, Caiwen Duan, Dengli Hong, Jie Yu, Lin Zou
Although we previously reported that the self-renewal of leukemia-initiating cells of B-lineage acute lymphoblastic leukemia (B-ALL LICs) was regulated by β-Arrestin1, a multiple-function protein, the cellular senescence is critical for LICs fate and leukemia progress, and worthy for further investigation. Here we found that depletion of β-Arrestin1 extended the population doubling time and the percentage of senile cells, the signatures of cellular senescence, of B-ALL LICs. Moreover, lack of β-Arrestin1 enhanced the expression of proteins (CBX, HIRA) and genes (P53, P16) related to senescence in leukemic Reh cells and B-ALL-LICs-derived leukemic mice...
April 20, 2017: Cell Death & Disease
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