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Protein Kinase

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https://www.readbyqxmd.com/read/28222424/1%C3%AE-25-oh-2d3-sensitive-cytosolic-ph-regulation-and-glycolytic-flux-in-human-endometrial-ishikawa-cells
#1
Ni Zeng, Yuetao Zhou, Shaqiu Zhang, Yogesh Singh, Bing Shi, Madhuri S Salker, Florian Lang
BACKGROUND/AIMS: Tumor cell proliferation is modified by 1,25-Dihydroxy-Vitamin D3 (1,25(OH)2D3), a steroid hormone predominantly known for its role in calcium and phosphorus metabolism. Key properties of tumor cells include enhanced glycolytic flux with excessive consumption of glucose and formation of lactate. As glycolysis is highly sensitive to cytosolic pH, maintenance of glycolysis requires export of H+ ions and lactate, which is in part accomplished by Na+/H+ exchangers, such as NHE1 and monocarboxylate transporters, such as MCT4...
February 8, 2017: Cellular Physiology and Biochemistry
https://www.readbyqxmd.com/read/28222420/camalexin-induced-cell-membrane-scrambling-and-cell-shrinkage-in-human-erythrocytes
#2
Mustafa Almasry, Mohamed Jemaà, Morena Mischitelli, Florian Lang, Caterina Faggio
BACKGROUND/AIMS: The thaliana phytoalexin Camalexin has been proposed for the treatment of malignancy. Camalexin counteracts tumor growth in part by stimulation of suicidal death or apoptosis of tumor cells. Similar to apoptosis of nucleated cells, erythrocytes may enter suicidal death or eryptosis, which is characterized by cell shrinkage and cell membrane scrambling with phosphatidylserine translocation to the erythrocyte surface. Cellular mechanisms contributing to the complex machinery executing eryptosis include increase of cytosolic Ca2+ activity ([Ca2+]i), oxidative stress, ceramide, protein kinase C and caspases...
February 13, 2017: Cellular Physiology and Biochemistry
https://www.readbyqxmd.com/read/28222358/tyrosine-kinase-inhibition-is-an-important-factor-for-gene-expression-of-crth2-in-human-eosinophils-and-lymphocytes-a-novel-mechanism-for-explaining-eosinophils-recruitment-by-the-neuro-immune-axis-in-allergic-rhinitis
#3
A E El-Shazly, P Roncarati, M Lejeune, P P Lefebvre, P Delvenne
We recently shown a novel neuro-immune competition between vasoactive intestinal peptide (VIP) and PGD2 for CRTH2 receptor, and that genistein augmented VIP and PGD2-induced eosinophil chemotaxis. However, there are neither studies on the CRTH2 gene expression in allergic rhinitis (AR) nor in the effect of tyrosine kinase inhibitors in CRTH2 gene regulation. Our Objectives were to study the gene expression modulation of CRTH2 receptor in AR patients and the effect of tyrosine kinase inhibitors (TKIs) on CRTH2 gene modulation...
February 18, 2017: International Immunopharmacology
https://www.readbyqxmd.com/read/28222174/slmapk3-enhances-tolerance-to-tomato-yellow-leaf-curl-virus-tylcv-by-regulating-salicylic-acid-and-jasmonic-acid-signaling-in-tomato-solanum-lycopersicum
#4
Yunzhou Li, Lei Qin, Jingjing Zhao, Tayeb Muhammad, Hehe Cao, Hailiang Li, Yan Zhang, Yan Liang
Several recent studies have reported on the role of mitogen-activated protein kinase (MAPK3) in plant immune responses. However, little is known about how MAPK3 functions in tomato (Solanum lycopersicum L.) infected with tomato yellow leaf curl virus (TYLCV). There is also uncertainty about the connection between plant MAPK3 and the salicylic acid (SA) and jasmonic acid (JA) defense-signaling pathways. The results of this study indicated that SlMAPK3 participates in the antiviral response against TYLCV. Tomato seedlings were inoculated with TYLCV to investigate the possible roles of SlMAPK1, SlMAPK2, and SlMAPK3 against this virus...
2017: PloS One
https://www.readbyqxmd.com/read/28222166/correction-auranofin-inhibits-retinal-pigment-epithelium-cell-survival-through-reactive-oxygen-species-dependent-epidermal-growth-factor-receptor-mitogen-activated-protein-kinase-signaling-pathway
#5
Xiaodong Chen, Radouil Tzekov, Mingyang Su, Haiyan Hong, Wang Min, Aidong Han, Wensheng Li
[This corrects the article DOI: 10.1371/journal.pone.0166386.].
2017: PloS One
https://www.readbyqxmd.com/read/28222153/dissecting-nutrient-related-co-expression-networks-in-phosphate-starved-poplars
#6
Mareike Kavka, Andrea Polle
Phosphorus (P) is an essential plant nutrient, but its availability is often limited in soil. Here, we studied changes in the transcriptome and in nutrient element concentrations in leaves and roots of poplars (Populus × canescens) in response to P deficiency. P starvation resulted in decreased concentrations of S and major cations (K, Mg, Ca), in increased concentrations of N, Zn and Al, while C, Fe and Mn were only little affected. In roots and leaves >4,000 and >9,000 genes were differently expressed upon P starvation...
2017: PloS One
https://www.readbyqxmd.com/read/28222093/active-zone-proteins-are-transported-via-distinct-mechanisms-regulated-by-par-1-kinase
#7
Kara R Barber, Julia Tanquary, Keegan Bush, Amanda Shaw, Michael Woodson, Michael Sherman, Yogesh P Wairkar
Disruption of synapses underlies a plethora of neurodevelopmental and neurodegenerative disease. Presynaptic specialization called the active zone plays a critical role in the communication with postsynaptic neuron. While the role of many proteins at the active zones in synaptic communication is relatively well studied, very little is known about how these proteins are transported to the synapses. For example, are there distinct mechanisms for the transport of active zone components or are they all transported in the same transport vesicle? Is active zone protein transport regulated? In this report we show that overexpression of Par-1/MARK kinase, a protein whose misregulation has been implicated in Autism spectrum disorders (ASDs) and neurodegenerative disorders, lead to a specific block in the transport of an active zone protein component- Bruchpilot at Drosophila neuromuscular junctions...
February 21, 2017: PLoS Genetics
https://www.readbyqxmd.com/read/28222026/hypoxic-regulation-of-the-expression-of-genes-encoded-estrogen-related-proteins-in-u87-glioma-cells-eff-ect-of-ire1-inhibition
#8
Minchenko Do, Riabovol Oo, Ratushna Oo, Minchenko Oh
OBJECTIVE: The aim of the present study was to examine the effect of inhibition of endoplasmic reticulum stress signaling, mediated by IRE1 (inositol requiring enzyme 1), which is a central mediator of the unfolded protein response on the expression of genes encoded estrogen related proteins (NRIP1/RIP140, TRIM16/EBBP, ESRRA/NR3B1, FAM162A/E2IG5, PGRMC2/PMBP, and SLC39A6/LIV-1) and their hypoxic regulation in U87 glioma cells for evaluation of their possible significance in the control of glioma cells proliferation...
January 1, 2017: Endocrine Regulations
https://www.readbyqxmd.com/read/28221775/electrostatic-interactions-as-mediators-in-the-allosteric-activation-of-pka-ri%C3%AE
#9
Emilia Pecora de Barros, Robert D Malmstrom, Kimya Nourbakhsh, Jason Cruz Del Rio, Alexandr P Kornev, Susan S Taylor, Rommie E Amaro
Close-range electrostatic interactions that form salt bridges are key components of protein stability. Here we investigate the role of these charged interactions in modulating the allosteric activation of Protein Kinase A (PKA) via computational and experimental mutational studies on a conserved basic patch located in the regulatory subunit's B/C helix. Molecular dynamics simulations evidenced the presence of an extended network of fluctuating salt bridges spanning the helix and connecting the two cAMP binding domains in its extremities...
February 21, 2017: Biochemistry
https://www.readbyqxmd.com/read/28220894/inhibition-of-n1-src-kinase-by-a-specific-sh3-peptide-ligand-reveals-a-role-for-n1-src-in-neurite-elongation-by-l1-cam
#10
Sarah Keenan, Sarah J Wetherill, Christopher I Ugbode, Sangeeta Chawla, William J Brackenbury, Gareth J O Evans
In the mammalian brain the ubiquitous tyrosine kinase, C-Src, undergoes splicing to insert short sequences in the SH3 domain to yield N1- and N2-Src. We and others have previously shown that the N-Srcs have altered substrate specificity and kinase activity compared to C-Src. However, the exact functions of the N-Srcs are unknown and it is likely that N-Src signalling events have been misattributed to C-Src because they cannot be distinguished by conventional Src inhibitors that target the kinase domain. By screening a peptide phage display library, we discovered a novel ligand (PDN1) that targets the unique SH3 domain of N1-Src and inhibits N1-Src in cells...
February 21, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28220887/mass-spectrometric-analysis-of-trpm6-and-trpm7-phosphorylation-reveals-regulatory-mechanisms-of-the-channel-kinases
#11
Na Cai, Zhiyong Bai, Vikas Nanda, Loren W Runnels
TRPM7 and TRPM6 were the first identified bifunctional channels to contain their own kinase domains, but how these channel-kinases are regulated is poorly understood. Previous studies identified numerous phosphorylation sites on TRPM7, but very little is known about TRPM6 phosphorylation or sites on TRPM7 transphosphorylated by TRPM6. Our mass spectrometric analysis of homomeric and heteromeric TRPM7 and TRPM6 channels identified phosphorylation sites on both proteins, as well as several prominent sites on TRPM7 that are commonly modified through autophosphorylation and transphosphorylation by TRPM6...
February 21, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28220794/flucrypyrim-a-novel-uterine-relaxant-has-antinociceptive-and-anti-inflammatory-effects-in-vivo
#12
Zhongtang Li, Limei Wang, Yue Cong, Lin Guo, Xiaohui Lin, Zuyin Yu, Xingan Wu, Junxing Dong, Rifang Yang, Yuwen Cong
Consequences of primary dsysmenorrhea (PD) can be severe. Increased prostaglandin production leads to uterine contraction and insufficient blood flow to the endometrium causing ischemia and pain symptoms. Protein tyrosine kinase/phosphatase activities contribute to the modulation of uterine contraction. In our previous study, we found the synthetic β-methoxyacrylates compound Fluacrypyrim (FAPM), significantly increased protein tyrosine phosphatases (PTPs) activity, resulting in dephosphorylation of tyrosine kinases...
February 21, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28220552/activation-of-the-mtor-dependent-signaling-pathway-underlies-ketamine-induced-uropathy
#13
Chih-Chieh Lin, An-Hang Yang, Alex Tong-Long Lin
AIMS: To investigate the pathogenic role of activation of the mammalian target of the rapamycin (mTOR) in the ketamine induced microvascular injury. METHODS: Twenty-three patients with ketamine-induced cystitis (KC) and 16 control volunteers were recruited. Bladder tissues were obtained from both groups by cystoscopic biopsies. Phospho-S6 ribosomal protein (p-S6RP), an end product of the mTOR pathway, was stained in the urinary bladder from both groups. Endothelial cells of the urinary bladder (HBdMECs) were examined to investigate the in vitro activation of the mTOR pathway and the co-expression of the endothelial marker (cluster of differentiation 31 [CD31]) and the mesenchymal marker (fibroblast-specific protein 1 [FSP-1])...
February 21, 2017: Neurourology and Urodynamics
https://www.readbyqxmd.com/read/28220451/osrlck-57-osrlck107-and-osrlck118-positively-regulate-chitin-and-pgn-induced-immunity-in-rice
#14
Zhangqun Li, Ying Ao, Dongru Feng, Jun Liu, Jinfa Wang, Hong-Bin Wang, Bing Liu
BACKGROUND: The receptor-like cytoplasmic kinase, OsRLCK176 has been reported to participate in both chitin- and PGN-induced immunity in rice. Here, we further researched the function of the homologous proteins, OsRLCK57, OsRLCK107 and OsRLCK118, in chitin- and PGN immunity in rice. FINDINGS: Silencing of OsRLCK57,OsRLCK107 and OsRLCK118 suppressed chitin- and PGN-induced immunity responses, including reactive oxygen species generation, defense gene expression. Furthermore, OsRLCK107 could interact with OsCERK1 in a MAMP induced way, which suggested a possible physiological relevance of OsRLCKs107 to OsCERK1 pathway...
December 2017: Rice
https://www.readbyqxmd.com/read/28220425/chitin-and-stress-induced-protein-kinase-activation
#15
Chandra Kenchappa, Raquel Azevedo da Silva, Simon Bressendorff, Sabrina Stanimirovic, Jakob Olsen, Morten Petersen, John Mundy
The assays described here are pertinent to protein kinase studies in any plant. They include an immunoblot phosphorylation/activation assay and an in-gel activity assay for MAP kinases (MPKs) using the general protein kinase substrate myelin basic protein. They also include a novel in-gel peptide substrate assay for Snf1-related kinase family 2 members (SnRK2s). This kinase family-specific assay overcomes some limitations of in-gel assays and permits the identification of different types of kinase activities in total protein extracts...
2017: Methods in Molecular Biology
https://www.readbyqxmd.com/read/28220424/cdpk-activation-in-prr-signaling
#16
Heike Seybold, Marie Boudsocq, Tina Romeis
Calcium-dependent protein kinases undergo a rapid biochemical activation in response to an intracellular Ca increase induced by the PRR-dependent perception of a pathogen-related stimulus. Based on SDS gel resolution, the in-gel kinase assay allows the analysis of multiple in vivo protein samples in parallel, combining the advantage of protein separation according to molecular mass with the activity read-out of a protein kinase assay. It thus enables to follow the transient CDPK activation and inactivation in response to in vivo elicitation with a time-wise resolution...
2017: Methods in Molecular Biology
https://www.readbyqxmd.com/read/28220423/leeix2-interactors-analysis-and-eix-mediated-responses-measurement
#17
Meirav Leibman-Markus, Silvia Schuster, Adi Avni
Plant-pathogen interactions involve a large number of wide regulatory systems, necessary for plant defense responses against pathogen attack. The fungal protein ethylene-inducing xylanase (EIX) elicits defense responses in specific cultivars of tobacco and tomato. The response to EIX is controlled by a single locus encoding for LeEIX2, a leucine-rich-repeat receptor-like-protein (LRR-RLP). As an RLP, LeEIX2 does not possess an obvious cytoplasmic signaling moiety such as a kinase domain. To study LeEIX2 mode of action, it is essential to identify the potential interactors involved after EIX perception...
2017: Methods in Molecular Biology
https://www.readbyqxmd.com/read/28220422/mapk-assays-in-arabidopsis-mamp-prr-signal-transduction
#18
Hoo Sun Chung, Jen Sheen
Activation of MAPK (Mitogen-Activated Protein Kinase) cascades after MAMP (Microbe-Associated Molecular Pattern) perception through PRR (Pattern Recognition Receptor) is one of the first conserved responses when plants encounter microbial organisms. Phosphorylation of various cellular factors in the MAMP-PRR pathway by MAPK cascades is critical for broad-spectrum plant innate immunity. Measurement of MAPK activation and identification of MAPK phosphorylation targets in the MAMP-PRR signal transduction pathway are essential to understand how plants reprogram their cellular processes to cope with unfavorable microbial attack...
2017: Methods in Molecular Biology
https://www.readbyqxmd.com/read/28220420/identification-of-mapk-substrates-using-quantitative-phosphoproteomics
#19
Tong Zhang, Jacqueline D Schneider, Ning Zhu, Sixue Chen
Activation of mitogen-activated protein kinases (MAPKs) under diverse biotic and abiotic factors and identification of an array of downstream MAPK target proteins are hot topics in plant signal transduction. Through interactions with a plethora of substrate proteins, MAPK cascades regulate many physiological processes in the course of plant growth, development, and response to environmental factors. Identification and quantification of potential MAPK substrates are essential, but have been technically challenging...
2017: Methods in Molecular Biology
https://www.readbyqxmd.com/read/28220341/adenovirus-mediated-small-interfering-rna-targeting-tak1-ameliorates-joint-inflammation-with-collagen-induced-arthritis-in-mice
#20
Xinjing Luo, Yongfeng Chen, Guoju Lv, Zhidong Zhou, Jie Chen, Xuanrong Mo, Jiangwen Xie
Transforming growth factor β-activated kinase-1 (TAK1) is a key upstream kinase in cell signaling during inflammation, which regulates the expression of inflammatory mediators. Small interfering RNA (siRNA) against TAK1 offers promise as a potential therapeutic strategy in immune-mediated inflammatory disorder including rheumatoid arthritis. Here, we are to evaluate the therapeutic effects of intra-articular administration of adenoviral-mediated siRNA against TAK1 (ad-siRNA-TAK1) on collagen-induced arthritis (CIA) in mice...
February 21, 2017: Inflammation
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