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https://www.readbyqxmd.com/read/28923850/increasing-the-un-neddylated-cullin1-portion-rescues-the-csn-phenotypes-by-stabilizing-adaptor-modules-to-drive-scf-assembly
#1
Qingqing Liu, Yike Zhou, Ruiqi Tang, Xuehong Wang, Qiwen Hu, Ying Wang, Qun He
The dynamic SCF assembly is controlled by cycles of cullin neddylation/deneddylation based on the deneddylation activity of the COP9 signalosome (CSN) and global sequestration of cullins by CAND1. However, this prediction is hampered in recent studies, and the regulatory mechanism and key players remain to be identified. We found that, maintaining a proper Cul1(Nedd8)/Cul1 ratio is crucial to ensure SCF functions. Reducing the high Cul1(Nedd8)/Cul1 ratios in csn mutants through ectopic expression of the non-neddylatable Cul1(K722R) proteins or introducing the endogenous cul1(K722R) point mutation significantly rescues their defective phenotypes...
September 18, 2017: Molecular and Cellular Biology
https://www.readbyqxmd.com/read/28902143/joint-resource-optimization-for-cognitive-sensor-networks-with-swipt-enabled-relay
#2
Weidang Lu, Yuanrong Lin, Hong Peng, Tian Nan, Xin Liu
Energy-constrained wireless networks, such as wireless sensor networks (WSNs), are usually powered by fixed energy supplies (e.g., batteries), which limits the operation time of networks. Simultaneous wireless information and power transfer (SWIPT) is a promising technique to prolong the lifetime of energy-constrained wireless networks. This paper investigates the performance of an underlay cognitive sensor network (CSN) with SWIPT-enabled relay node. In the CSN, the amplify-and-forward (AF) relay sensor node harvests energy from the ambient radio-frequency (RF) signals using power splitting-based relaying (PSR) protocol...
September 13, 2017: Sensors
https://www.readbyqxmd.com/read/28891468/epidermal-growth-factor-receptor-neddylation-is-regulated-by-a-desmosomal-cop9-constitutive-photomorphogenesis-9-signalosome-complex
#3
Nicole Ann Najor, Gillian Nicole Fitz, Jennifer Leigh Koetsier, Lisa Mary Godsel, Lauren Veronica Albrecht, Robert M Harmon, Kathleen Janee Green
Cell junctions are scaffolds that integrate mechanical and chemical signaling. We previously showed that a desmosomal cadherin promotes keratinocyte differentiation in an adhesion-independent manner by dampening Epidermal Growth Factor Receptor (EGFR) activity. Here we identify a potential mechanism by which desmosomes assist the de-neddylating COP9 signalosome (CSN) in attenuating EGFR through an association between the Cops3 subunit of the CSN and desmosomal components, Desmoglein1 (Dsg1) and Desmoplakin (Dp), to promote epidermal differentiation...
September 11, 2017: ELife
https://www.readbyqxmd.com/read/28861005/murine-myocardial-transcriptome-analysis-reveals-a-critical-role-of-cops8-in-the-gene-expression-of-cullin-ring-ligase-substrate-receptors-and-redox-and-vesicle-trafficking-pathways
#4
Ammara Abdullah, Kathleen M Eyster, Travis Bjordahl, Peng Xiao, Erliang Zeng, Xuejun Wang
Background: The COP9 signalosome (CSN) consisting of 8 unique protein subunits (COPS1 through COPS8) serves as the cullin deneddylase, regulating the catalytic dynamics of cullin RING ligases (CRLs), the largest family of ubiquitin ligases Background: The COP9 signalosome (CSN) consisting of 8 unique protein subunits (COPS1 through COPS8) serves as the cullin deneddylase, regulating the catalytic dynamics of cullin RING ligases (CRLs), the largest family of ubiquitin ligases. Supported primarily by the decrease of substrate receptor (SR) proteins of CRLs in cells deficient of a CSN subunit, CSN-mediated cullin deneddylation is believed to prevent autoubiquitination and self-destruction of the SR in active CRLs...
2017: Frontiers in Physiology
https://www.readbyqxmd.com/read/28842025/an-integrated-automatic-system-to-evaluate-u-and-th-dynamic-lixiviation-from-solid-matrices-and-to-extract-pre-concentrate-leached-analytes-previous-icp-ms-detection
#5
Melisa Rodas Ceballos, Rafael García-Tenorio, José Manuel Estela, Víctor Cerdà, Laura Ferrer
Leached fractions of U and Th from different environmental solid matrices were evaluated by an automatic system enabling the on-line lixiviation and extraction/pre-concentration of these two elements previous ICP-MS detection. UTEVA resin was used as selective extraction material. Ten leached fraction, using artificial rainwater (pH 5.4) as leaching agent, and a residual fraction were analyzed for each sample, allowing the study of behavior of U and Th in dynamic lixiviation conditions. Multivariate techniques have been employed for the efficient optimization of the independent variables that affect the lixiviation process...
December 1, 2017: Talanta
https://www.readbyqxmd.com/read/28748859/recommendations-for-electroencephalography-monitoring-in-neurocritical-care-units
#6
(no author information available yet)
No abstract text is available yet for this article.
August 5, 2017: Chinese Medical Journal
https://www.readbyqxmd.com/read/28745441/clinical-staff-nurse-leadership-identifying-gaps-in-competency-development
#7
Sherron Franks-Meeks
BACKGROUND: To date, there has been no development of a complete, applicable inventory of clinical staff nurse (CSN) leadership role competencies through a valid and reliable methodology. Further, the CSN has not been invited to engage in the identification, definition, or development of their own leadership competencies. OBJECTIVE: Compare existing leadership competencies to identify and highlight gaps in clinical staff nurse leadership role competency development and validation...
July 26, 2017: Nursing Forum
https://www.readbyqxmd.com/read/28744713/genome-wide-analysis-of-gene-expression-profiling-revealed-that-cop9-signalosome-is-essential-for-correct-expression-of-fe-homeostasis-genes-in-arabidopsis
#8
Seckin Eroglu, Emre Aksoy
In plant cells, either excess or insufficient iron (Fe) concentration triggers stress responses, therefore it is strictly controlled. Proteasome-mediated degradation through ubiquitination of Fe homeostasis proteins has just become the focus of research in recent years. Deactivating ubiquitin ligases, COP9 signalosome has a central importance in the translational control of various stress responses. The aim of the study was to investigate COP9 signalosome in Fe deficiency response of Strategy I plants. In silico analysis of a set of Fe-deficiency-responsive genes was conducted against the transcriptome of Arabidopsis csn mutant lines using Genevestigator software...
July 25, 2017: Biometals: An International Journal on the Role of Metal Ions in Biology, Biochemistry, and Medicine
https://www.readbyqxmd.com/read/28740186/carotid-sinus-nerve-electrical-stimulation-in-conscious-rats-attenuates-systemic-inflammation-via-chemoreceptor-activation
#9
Fernanda Machado Santos-Almeida, Gean Domingos-Souza, César A Meschiari, Laura Campos Fávaro, Christiane Becari, Jaci A Castania, Alexandre Lopes, Thiago M Cunha, Davi J A Moraes, Fernando Q Cunha, Luis Ulloa, Alexandre Kanashiro, Geisa C S V Tezini, Helio C Salgado
Recent studies demonstrated a critical functional connection between the autonomic (sympathetic and parasympathetic) nervous and the immune systems. The carotid sinus nerve (CSN) conveys electrical signals from the chemoreceptors of the carotid bifurcation to the central nervous system where the stimuli are processed to activate sympathetic and parasympathetic efferent signals. Here, we reported that chemoreflex activation via electrical CSN stimulation, in conscious rats, controls the innate immune response to lipopolysaccharide attenuating the plasma levels of inflammatory cytokines such as tumor necrosis factor (TNF), interleukin 1β (IL-1β) and interleukin 6 (IL-6)...
July 24, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28682262/cell-like-spiking-neural-p-systems-with-request-rules
#10
Linqiang Pan, Tingfang Wu, Yansen Su, Athanasios V Vasilakos
Cell-like spiking neural P systems (in short, cSN P systems) are a class of distributed and parallel computation models inspired by both the way in which neurons process information and communicate to each other by means of spikes and the compartmentalized structures of living cells. cSNP systems have been proved to be Turing universal if more spikes can be produced by consuming some spikes or spikes can be replicated. In this work, in order to answer the open problem whether this functioning of producing more spikes and replicating spikes can be avoided by using some strategy without the loss of computation power, we introduce cSN P systems with request rules, which have classical spiking rules and forgetting rules, and also request rules in the skin membrane...
July 3, 2017: IEEE Transactions on Nanobioscience
https://www.readbyqxmd.com/read/28623958/knockdown-of-subunit-3-of-the-cop9-signalosome-inhibits-c2c12-myoblast-differentiation-via-nf-kappab-signaling-pathway
#11
Mariam A Ba, Jeffrey Surina, Cherie A Singer, Maria L Valencik
BACKGROUND: The COP9 signalosome (CSN) is a conserved protein complex composed of 8 subunits designated CSN1-CSN8. CSN3 represents the third subunit of the CSN and maintains the integrity of the complex. CSN3 binds to the striated muscle-specific β1D integrin tail, and its subcellular localization is altered in differentiated skeletal muscle cells. However, the role of CSN3 in skeletal muscle differentiation is unknown. The main goal of this study was to identify whether CSN3 participates in myoblast differentiation and the signalling mechanisms involved using C2C12 cells as a skeletal muscle cell model...
June 17, 2017: BMC Pharmacology & Toxicology
https://www.readbyqxmd.com/read/28550524/cop9-signalosome-subunit-pfcsne-regulates-secondary-metabolism-and-conidial-formation-in-pestalotiopsis-fici
#12
Yanjing Zheng, Xiuna Wang, Xiaoling Zhang, Wei Li, Gang Liu, Shihua Wang, Xiufeng Yan, Huixi Zou, Wen-Bing Yin
The COP9 signalosome (CSN) is a highly conserved multiprotein complex in all eukaryotes and involved in regulation of organism development. In filamentous fungi, several lines of evidence indicate that fungal development and secondary metabolism (SM) are mediated by the fifth subunit of CSN, called CsnE. Here we uncover a connection with CsnE and conidial formation as well as SM regulation in the plant endophytic fungus Pestalotiopsis fici. A homology search of the P. fici genome with CsnE, involved in sexual development and SM in Aspergillus nidulans, identified PfCsnE...
May 25, 2017: Science China. Life Sciences
https://www.readbyqxmd.com/read/28539160/phosphorylation-of-p53-at-threonine-155-is-required-for-jab1-mediated-nuclear-export-of-p53
#13
Eun-Woo Lee, Wonkyung Oh, Hosung Paul Song, Won Kon Kim
The Jun activation-domain binding protein 1 (Jab1) induces p53 nuclear export and cytoplasmic degradation, but the underlying mechanism is poorly understood. Here, we show that phosphorylation at the threonine 155 residue is essential for Jab1-mediated p53 nuclear export. Jab1 stimulated phosphorylation of p53 at T155 was inhibited by curcumin, an inhibitor of COP9 signalosome (CSN)-associated kinases. The T155E mutant, which mimics phosphorylated p53, exhibited spontaneous cytoplasmic localization in the absence of Jab1...
July 2017: BMB Reports
https://www.readbyqxmd.com/read/28443828/controlled-synthesis-of-mno2-nanosheets-vertically-covered-feco2o4-nanoflakes-as-binder-free-electrode-for-high-power-and-durable-asymmetric-supercapacitor
#14
Hongyan Gao, Junjie Xiang, Yan Cao
We developed a simple and controlled method to synthesize FeCo2O4@MnO2 core-sheath nanoarchitecture (CSN) grown on the Ni foam. Ultrathin FeCo2O4 nanoflakes with an average thickness of 10 nm served as the scaffold to deposit MnO2 nanosheets. The MnO2 nanosheets were able to vertically grow on FeCo2O4 nanoflakes to form a sheath via a hydrothermal reaction. The nanocomposites' thickness can be tailored from 80 nm to 550 nm by changing the reaction times. Electrochemical measurements demonstrated that FeCo2O4@MnO2 CSN with an optimal thickness about 400 nm achieved an areal capacitance of 3...
April 26, 2017: Nanotechnology
https://www.readbyqxmd.com/read/28379117/an-evaluation-of-mass-absorption-cross-section-for-optical-carbon-analysis-on-teflon-filter-media
#15
Paige Presler-Jur, Prakash Doraiswamy, Oki Hammond, Joann Rice
Black carbon (BC) or elemental carbon (EC) is a by-product of incomplete fuel combustion, and contributes adversely to human health, visibility, and climate impacts. Previous studies have examined non-destructive techniques for particle light attenuation measurements on Teflon(®) filters to estimate BC. The incorporation of an inline Magee Scientific OT21 Transmissometer into the MTL AH-225 robotic weighing system provides the opportunity to perform optical transmission measurements on Teflon(®) filters at the same time as the gravimetric mass measurement...
April 5, 2017: Journal of the Air & Waste Management Association
https://www.readbyqxmd.com/read/28378888/a-novel-electrophoretic-deposited-coordination-supramolecular-network-film-for-detecting-phosphate-and-biophosphate
#16
Tianshu Chu, Feng Zhang, Yi Wang, Yangyi Yang, Seik Weng Ng
A series of new lanthanide coordination supramolecular networks (CSNs) based on nalidixic acid (HNA) ligand were designed and synthesized. Their crystal structures were determined by single-crystal XRD techniques. Thin films of these compounds were first successfully deposited on indium tin oxide (ITO) glass through one-step electrophoretic deposition under mild conditions. The europium CSN film exhibits intense red emission and can act as a highly sensitive luminescent sensor for H2 PO4(-) anions and adenosine triphosphate (ATP) in aqueous solution...
April 5, 2017: Chemistry: a European Journal
https://www.readbyqxmd.com/read/28377589/the-arabidopsis-cop9-signalosome-subunit-4-cns4-is-involved-in-adventitious-root-formation
#17
Daniel Ioan Pacurar, Monica Lacramioara Pacurar, Abdellah Lakehal, Andrea Mariana Pacurar, Alok Ranjan, Catherine Bellini
The COP9 signalosome (CSN) is an evolutionary conserved multiprotein complex that regulates many aspects of plant development by controlling the activity of CULLIN-RING E3 ubiquitin ligases (CRLs). CRLs ubiquitinate and target for proteasomal degradation a vast number of specific substrate proteins involved in many developmental and physiological processes, including light and hormone signaling and cell division. As a consequence of CSN pleiotropic function, complete loss of CSN activity results in seedling lethality...
April 4, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28377317/dehydroascorbate-derivatized-chitosan-particles-for-targeting-antimalarial-agents-to-infected-erythrocytes
#18
Hasham Shafi, D V Siva Reddy, Tabassum Khan, Rajeev Ranjan, Ashish Srivastava, Suniti Vaishya, Tanuj Sharma, Mohammad Imran Siddiqui, Saman Habib, Amit Misra
The mammalian glucose transporter GLUT-1 and Plasmodium falciparum hexose transporter PfHT1 are overexpressed on human RBC infected with the parasite (iRBC), presumably for enhanced glucose uptake. Dehydroascorbic acid (DHA) competes out glucose in GLUT-1 binding. We prepared particles containing chloroquine phosphate using novel derivatives of chitosan (CSN). CSN was either pre-derivatized with DHA (PRE) or particles made of CSN were derivatized by surface-grafting DHA (POST). The optimized formulations were analyzed for size (170-200nm) drug content (about 40%) entrapment efficiency (50-57%), in vitro drug release (80% in 72h, Higuchi's model), hemolysis on exposure to whole blood or RBC at 5% hematocrit, cytotoxicity towards cultured HEK 293T (kidney) and HepG2 (hepatic) cells, targeting iRBC and in vitro efficacy against P...
April 2, 2017: International Journal of Pharmaceutics
https://www.readbyqxmd.com/read/28371146/investigating-chitin-deacetylation-and-chitosan-hydrolysis-during-vegetative-growth-in-magnaporthe-oryzae
#19
Ivey A Geoghegan, Sarah J Gurr
Chitin deacetylation results in the formation of chitosan, a polymer of β1,4-linked glucosamine. Chitosan is known to have important functions in the cell walls of a number of fungal species, but its role during hyphal growth has not yet been investigated. In this study, we have characterized the role of chitin deacetylation during vegetative hyphal growth in the filamentous phytopathogen Magnaporthe oryzae. We found that chitosan localizes to the septa and lateral cell walls of vegetative hyphae and identified 2 chitin deacetylases expressed during vegetative growth-CDA1 and CDA4...
September 2017: Cellular Microbiology
https://www.readbyqxmd.com/read/28340738/-226-ra-dynamic-lixiviation-from-phosphogypsum-samples-by-an-automatic-flow-through-system-with-integrated-renewable-solid-phase-extraction
#20
Melisa Rodas Ceballos, Antoni Borràs, Rafael García-Tenorio, Rogelio Rodríguez, José Manuel Estela, Víctor Cerdà, Laura Ferrer
The release of (226)Ra from phosphogypsum (PG) was evaluated by developing a novel tool for fully automated (226)Ra lixiviation from PG integrating extraction/pre-concentration using a renewable sorbent format. Eight leached fractions (30mL each one) and a residual fraction were analyzed allowing the evaluation of dynamic lixiviation of (226)Ra. An automatic system allows this approach coupling a homemade cell with a (226)Ra extraction/pre-concentration method, which is carried out combining two procedures: Ra adsorption on MnO2 and its posterior co-precipitation with BaSO4...
May 15, 2017: Talanta
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