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N-end rule

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https://www.readbyqxmd.com/read/29033328/the-cys-arg-n-end-rule-pathway-is-a-general-sensor-of-abiotic-stress-in-flowering-plants
#1
Jorge Vicente, Guillermina M Mendiondo, Mahsa Movahedi, Marta Peirats-Llobet, Yu-Ting Juan, Yu-Yen Shen, Charlene Dambire, Katherine Smart, Pedro L Rodriguez, Yee-Yung Charng, Julie E Gray, Michael J Holdsworth
Abiotic stresses impact negatively on plant growth, profoundly affecting yield and quality of crops. Although much is known about plant responses, very little is understood at the molecular level about the initial sensing of environmental stress. In plants, hypoxia (low oxygen, which occurs during flooding) is directly sensed by the Cys-Arg/N-end rule pathway of ubiquitin-mediated proteolysis, through oxygen-dependent degradation of group VII Ethylene Response Factor transcription factors (ERFVIIs) via amino-terminal (Nt-) cysteine [1, 2]...
October 11, 2017: Current Biology: CB
https://www.readbyqxmd.com/read/29033021/-smoking-cessation-and-pregnancy
#2
M Underner, O Pourrat, J Perriot, G Peiffer, N Jaafari
Active and passive smoking during pregnancy induce several deleterious effects that may have a negative impact on pregnancy progress, fetus development and both mother and newborn health. Smoking cessation should be a rule for any woman as soon as the beginning of her pregnancy, or better in anticipation of a pregnancy when contraception is no more taken. Every caregiver must help every pregnant woman who smokes to quit smoking. Smoking cessation interventions in pregnant women must combine a psychological support (mainly with cognitive behavioral therapy) and nicotine replacement therapy, which can also be used during breast feeding...
October 9, 2017: Gynecologie, Obstetrique, Fertilite & Senologie
https://www.readbyqxmd.com/read/28981713/crispr-cas9-based-genome-editing-for-simultaneous-interference-with-gene-expression-and-protein-stability
#3
Virginia Martínez, Ida Lauritsen, Tonja Hobel, Songyuan Li, Alex Toftgaard Nielsen, Morten H H Nørholm
Interference with genes is the foundation of reverse genetics and is key to manipulation of living cells for biomedical and biotechnological applications. However, classical genetic knockout and transcriptional knockdown technologies have different drawbacks and offer no control over existing protein levels. Here, we describe an efficient genome editing approach that affects specific protein abundances by changing the rates of both RNA synthesis and protein degradation, based on the two cross-kingdom control mechanisms CRISPRi and the N-end rule for protein stability...
September 7, 2017: Nucleic Acids Research
https://www.readbyqxmd.com/read/28949872/online-public-reactions-to-fmri-communication-with-patients-with-disorders-of-consciousness-quality-of-life-end-of-life-decision-making-and-concerns-with-misdiagnosis
#4
Jennifer A Chandler, Jeffrey A Sun, Eric Racine
BACKGROUND: Recently, the news media have reported on the discovery of covert awareness and the establishment of limited communication using a functional magnetic resonance imaging (fMRI) neuroimaging technique with several brain-injured patients thought to have been in a vegetative state. This discovery has raised many ethical, legal, and social questions related to quality of life, end-of-life decision making, diagnostic and prognostic accuracy in disorders of consciousness, resource allocation, and other issues...
January 2017: AJOB Empirical Bioethics
https://www.readbyqxmd.com/read/28936674/conditional-modulation-of-biological-processes-by-low-temperature-degrons
#5
Nico Dissmeyer
Conditional modulation of biological processes plays key roles in basic and applied research and in translation. It can be achieved on various levels via a multitude of approaches. One of the directions is manipulating target protein levels and activity by transcriptional, posttranscriptional, translational, and posttranslational control. Because in most of these techniques, the synthesis of the target proteins is adjusted to the needs, they all rely on the specific half-life of the target protein and its turn-over...
2017: Methods in Molecular Biology
https://www.readbyqxmd.com/read/28931440/core-outcomes-in-periodontal-trials-study-protocol-for-core-outcome-set-development
#6
Thomas J Lamont, Jan E Clarkson, David N J Ricketts, Peter A Heasman, Craig R Ramsay
BACKGROUND: There are a large number of clinical outcome measures used to assess the effectiveness of prevention and management strategies of periodontal diseases. This heterogeneity causes difficulties when trying to synthesise data for systematic reviews or clinical guidelines, reducing their impact. Core outcome sets are an agreed, standardised list of outcomes that should be measured and reported in all trials in specific clinical areas. We aim to develop a core outcome set for effectiveness trials investigating the prevention and management of periodontal disease in primary or secondary care...
September 20, 2017: Trials
https://www.readbyqxmd.com/read/28906386/development-and-validation-of-a-prediction-score-system-in-lupus-nephritis
#7
Yi Tang, Wei Qin, Wei Peng, Ye Tao
The risk assessment for developing end-stage renal disease (ESRD) remains unclear in patients with lupus nephritis (LN). The purpose of this study was to develop and validate a prediction rule for estimating the individual risk of ESRD in patients with LN using clinical and pathological data.A total of 599 patients with LN diagnosed by renal biopsy between June 2009 and June 2014 in West China Hospital of Sichuan University were retrospectively followed. Patients were randomly divided into derivation cohort (n = 379) and validation cohort (n = 220)...
September 2017: Medicine (Baltimore)
https://www.readbyqxmd.com/read/28760210/a-randomized-trial-of-a-1-hour-troponin-t-protocol-in-suspected-acute-coronary-syndromes-design-of-the-rapid-assessment-of-possible-acs-in-the-emergency-department-with-high-sensitivity-troponin-t-rapid-tnt-study
#8
RANDOMIZED CONTROLLED TRIAL
Cynthia Papendick, Andrew Blyth, Anil Seshadri, Michael J R Edmonds, Tom Briffa, Louise Cullen, Stephen Quinn, Jon Karnon, Anthony Chuang, Adam J Nelson, Matthew Horsfall, Erin Morton, Derek P Chew
BACKGROUND: Protocols incorporating high-sensitivity troponin to guide decision making in the disposition of patients with suspected acute coronary syndromes (ACS) in the emergency department have received a lot of attention. Traditionally, patients with chest pain have required long periods of observation in emergency department before being deemed safe for discharge. In an era of limited health service resources, a protocol that could discharge patients safely within an hour of presentation is extremely attractive...
August 2017: American Heart Journal
https://www.readbyqxmd.com/read/28741696/age-dependent-regulation-of-erf-vii-transcription-factor-activity-in-arabidopsis-thaliana
#9
Beatrice Giuntoli, Vinay Shukla, Federica Maggiorelli, Federico M Giorgi, Lara Lombardi, Pierdomenico Perata, Francesco Licausi
The Group VII Ethylene Responsive Factors (ERFs-VII) RAP2.2 and RAP2.12 have been mainly characterized with regard to their contribution as activators of fermentation in plants. However, transcriptional changes measured in conditions that stabilize these transcription factors exceed the mere activation of this biochemical pathway, implying additional roles performed by the ERF-VIIs in other processes. We evaluated gene expression in transgenic Arabidopsis lines expressing a stabilized form of RAP2.12, or hampered in ERF-VII activity, and identified genes affected by this transcriptional regulator and its homologs, including some involved in oxidative stress response, which are not universally induced under anaerobic conditions...
October 2017: Plant, Cell & Environment
https://www.readbyqxmd.com/read/28740232/p62-sqstm1-sequestosome-1-is-an-n-recognin-of-the-n-end-rule-pathway-which-modulates-autophagosome-biogenesis
#10
Hyunjoo Cha-Molstad, Ji Eun Yu, Zhiwei Feng, Su Hyun Lee, Jung Gi Kim, Peng Yang, Bitnara Han, Ki Woon Sung, Young Dong Yoo, Joonsung Hwang, Terry McGuire, Sang Mi Shim, Hyun Dong Song, Srinivasrao Ganipisetti, Nuozhou Wang, Jun Min Jang, Min Jae Lee, Seung Jun Kim, Kyung Ho Lee, Jin Tae Hong, Aaron Ciechanover, Inhee Mook-Jung, Kwang Pyo Kim, Xiang-Qun Xie, Yong Tae Kwon, Bo Yeon Kim
Macroautophagy mediates the selective degradation of proteins and non-proteinaceous cellular constituents. Here, we show that the N-end rule pathway modulates macroautophagy. In this mechanism, the autophagic adapter p62/SQSTM1/Sequestosome-1 is an N-recognin that binds type-1 and type-2 N-terminal degrons (N-degrons), including arginine (Nt-Arg). Both types of N-degrons bind its ZZ domain. By employing three-dimensional modeling, we developed synthetic ligands to p62 ZZ domain. The binding of Nt-Arg and synthetic ligands to ZZ domain facilitates disulfide bond-linked aggregation of p62 and p62 interaction with LC3, leading to the delivery of p62 and its cargoes to the autophagosome...
July 24, 2017: Nature Communications
https://www.readbyqxmd.com/read/28735697/disentangling-heterogeneity-of-childhood-disruptive-behavior-problems-into-dimensions-and-subgroups
#11
Koen Bolhuis, Gitta H Lubke, Jan van der Ende, Meike Bartels, Catharina E M van Beijsterveldt, Paul Lichtenstein, Henrik Larsson, Vincent W V Jaddoe, Steven A Kushner, Frank C Verhulst, Dorret I Boomsma, Henning Tiemeier
OBJECTIVE: Irritable and oppositional behaviors are increasingly considered as distinct dimensions of oppositional defiant disorder. However, few studies have explored this multidimensionality across the broader spectrum of disruptive behavior problems (DBPs). This study examined the presence of dimensions and distinct subgroups of childhood DBPs, and the cross-sectional and longitudinal associations between these dimensions. METHOD: Using factor mixture models (FMMs), the presence of dimensions and subgroups of DBPs was assessed in the Generation R Study at ages 6 (n = 6,209) and 10 (n = 4,724) years...
August 2017: Journal of the American Academy of Child and Adolescent Psychiatry
https://www.readbyqxmd.com/read/28652337/mine-conformational-dynamics-regulate-membrane-binding-mind-interaction-and-min-oscillation
#12
Kyung-Tae Park, Maria T Villar, Antonio Artigues, Joe Lutkenhaus
In Escherichia coli MinE induces MinC/MinD to oscillate between the ends of the cell, contributing to the precise placement of the Z ring at midcell. To do this, MinE undergoes a remarkable conformational change from a latent 6β-stranded form that diffuses in the cytoplasm to an active 4β-stranded form bound to the membrane and MinD. How this conformational switch occurs is not known. Here, using hydrogen-deuterium exchange coupled to mass spectrometry (HDX-MS) we rule out a model in which the two forms are in rapid equilibrium...
July 18, 2017: Proceedings of the National Academy of Sciences of the United States of America
https://www.readbyqxmd.com/read/28633696/cross-border-collaboration-for-improved-tuberculosis-prevention-and-care-policies-tools-and-experiences
#13
M Dara, G Sulis, R Centis, L D'Ambrosio, G de Vries, P Douglas, D Garcia, N Jansen, E Zuroweste, G B Migliori
As tuberculosis (TB) spreads beyond borders with people movements, several interventions ensuring the continuity of care are essential, although difficult to put in place in the absence of well-defined agreements allowing data sharing and easy referral of patients to appropriate health facilities. This article first sets out general principles for cross-border collaboration and continuity of care. It then presents a series of case studies. Policies and practices on cross-border collaboration in selected low-incidence countries (Australia, Italy, Norway, The Netherlands, the United Kingdom and the United States) are described and critically appraised...
July 1, 2017: International Journal of Tuberculosis and Lung Disease
https://www.readbyqxmd.com/read/28616536/nt-probnp-and-diastolic-left-ventricular-function-in-patients-with-marfan-syndrome
#14
Petra Gehle, Peter N Robinson, Frank Heinzel, Frank Edelmann, Mustafa Yigitbasi, Felix Berger, Volkmar Falk, Burkert Pieske, Ernst Wellnhofer
AIMS: Subclinical diastolic dysfuntion in patients with preclinical heart failure with preserved ejection fraction (HFpEF) has been demonstrated in patients with Marfan syndrome (MFS). We investigated the relationship between diastolic dysfunction and NT-proBNP levels in patients with MFS. METHODS AND RESULTS: NT-proBNP, C-reactive protein (CRP) and diastolic function were assessed in 217 patients with MFS (31 ± 16 y, 110 f. and in 339 patients referred for suspected MFS in whom the diagnosis was ruled out according to the Ghent nosology (30 ± 15 y, 154 f)...
September 2016: IJC Heart & Vasculature
https://www.readbyqxmd.com/read/28602583/coupled-caspase-and-n-end-rule-ligase-activities-allow-recognition-and-degradation-of-pluripotency-factor-lin-28-during-non-apoptotic-development
#15
Benjamin P Weaver, Yi M Weaver, Shohei Mitani, Min Han
Recent findings suggest that components of the classical cell death machinery also have important non-cell-death (non-apoptotic) functions in flies, nematodes, and mammals. However, the mechanisms for non-canonical caspase substrate recognition and proteolysis, and the direct roles for caspases in gene expression regulation, remain largely unclear. Here we report that CED-3 caspase and the Arg/N-end rule pathway cooperate to inactivate the LIN-28 pluripotency factor in seam cells, a stem-like cell type in Caenorhabditis elegans, thereby ensuring proper temporal cell fate patterning...
June 19, 2017: Developmental Cell
https://www.readbyqxmd.com/read/28601634/synthesis-and-assembly-of-hepatitis-b-virus-envelope-protein-derived-particles-in-escherichia-coli
#16
Hao Li, Keisuke Onbe, Qiushi Liu, Masumi Iijima, Kenji Tatematsu, Masaharu Seno, Hiroko Tada, Shun' Ichi Kuroda
Hepatitis B virus (HBV) envelope particles have been synthesized in eukaryotic cells (e.g., mammalian cells, insect cells, and yeast cells) as an HB vaccine immunogen and drug delivery system (DDS) nanocarrier. Many researchers had made attempts to synthesize the particles in Escherichia coli for minimize the cost and time for producing HBV envelope particles, but the protein was too deleterious to be synthesized in E. coli. In this study, we generated deletion mutants of HBV envelope L protein (389 amino acid residues (aa)) containing three transmembrane domains (TM1, TM2, TM3)...
August 19, 2017: Biochemical and Biophysical Research Communications
https://www.readbyqxmd.com/read/28581033/life-and-death-of-proteins-after-protease-cleavage-protein-degradation-by-the-n-end-rule-pathway
#17
REVIEW
Nico Dissmeyer, Susana Rivas, Emmanuelle Graciet
The N-end rule relates the stability of a protein to the identity of its N-terminal residue and some of its modifications. Since its discovery in the 1980s, the repertoire of N-terminal degradation signals has expanded, leading to a diversity of N-end rule pathways. Although some of these newly discovered N-end rule pathways remain largely unexplored in plants, recent discoveries have highlighted roles of N-end rule-mediated protein degradation in plant defense against pathogens and in cell proliferation during organ growth...
June 5, 2017: New Phytologist
https://www.readbyqxmd.com/read/28578682/secondary-distress-in-violence-researchers-a-randomised-trial-of-the-effectiveness-of-group-debriefings
#18
Heidi Grundlingh, Louise Knight, Dipak Naker, Karen Devries
BACKGROUND: Secondary distress including emotional distress, vicarious trauma (VT) and secondary traumatic stress (STS) due to exposure to primary trauma victims have been described in helping professionals and in violence researchers. To our knowledge, there are few prevalence studies, and no tailored interventions have been tested to reduce secondary distress in violence researchers. The study aims to (1) describe the epidemiology of secondary distress experienced by violence researchers; to (2) assess the effectiveness of group debriefings in mitigating secondary distress; to (3) assess risk and protective factors...
June 2, 2017: BMC Psychiatry
https://www.readbyqxmd.com/read/28545574/initiating-change-locally-in-bullying-and-aggression-through-the-school-environment-inclusive-trial-update-to-cluster-randomised-controlled-trial-protocol
#19
Chris Bonell, Anne Mathiot, Elizabeth Allen, Leonardo Bevilacqua, Deborah Christie, Diana Elbourne, Adam Fletcher, Richard Grieve, Rosa Legood, Stephen Scott, Emily Warren, Meg Wiggins, Russell M Viner
BACKGROUND: Systematic reviews suggest that multi-component interventions are effective in reducing bullying victimisation and perpetration. We are undertaking a phase III randomised trial of the INCLUSIVE multi-component intervention. This trial aims to assess the effectiveness and cost-effectiveness of the INCLUSIVE intervention in reducing aggression and bullying victimisation in English secondary schools. This paper updates the original trial protocol published in 2014 (Trials 15:381, 2014) and presents the changes in the process evaluation protocol and the secondary outcome data collection...
May 25, 2017: Trials
https://www.readbyqxmd.com/read/28534225/biomarker-monitoring-of-controlled-dietary-acrylamide-exposure-indicates-consistent-human-endogenous-background
#20
Katharina Goempel, Laura Tedsen, Meike Ruenz, Tamara Bakuradze, Dorothea Schipp, Jens Galan, Gerhard Eisenbrand, Elke Richling
The aim of the present study was to explore the relation of controlled dietary acrylamide (AA) intake with the excretion of AA-related urinary mercapturic acids (MA), N-acetyl-S-(carbamoylethyl)-L-cysteine (AAMA) and N-acetyl-S-(1-carbamoyl-2-hydroxyethyl)-L-cysteine (GAMA). Excretion kinetics of these short-term exposure biomarkers were monitored under strictly controlled conditions within a duplicate diet human intervention study. One study arm (group A, n = 6) ingested AA via coffee (0.15-0.17 µg/kg bw) on day 6 and in a meal containing an upper exposure level of AA (14...
May 22, 2017: Archives of Toxicology
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