Search results for: N-(Aminoethyl)-5-naphthylamine-1-sulfonic Acid Sodium Salt C12H13N2NaO3S CAS: 100900-07-0
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Calcium-Alkali Syndrome Associated with Hypoparathyroidism Following Total Thyroidectomy.Patients with permanent postsurgical hypoparathyroidism, a complication of total thyroidectomy, often require high calcium supplementation with vitamin D to maintain serum calcium levels. The epidemiology of calcium-alkali syndrome (CAS) in patients with hypoparathyroidism after total thyroidectomy remains unclear. This study aimed to investigate the incidence of hypercalcemia, renal impairment, metabolic alkalosis, and CAS in patients treated for presumed hypoparathyroidism after total thyroidectomy.
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Divalent cations promote TALE DNA-binding specificity.Recent advances in gene editing have been enabled by programmable nucleases such as transcription activator-like effector nucleases (TALENs) and CRISPR-Cas9. However, several open questions remain regarding the molecular machinery in these systems, including fundamental search and binding behavior as well as role of off-target binding and specificity. In order to achieve efficient and specific cleavage at target sites, a high degree of target site discrimination must be demonstrated for gene editing applications. In this work, we studied the binding affinity and specificity for a series of TALE proteins under a variety of solution conditions using in vitro fluorescence methods and molecular dynamics (MD) simulations. Remarkably, we identified that TALEs demonstrate high sequence specificity only upon addition of small amounts of certain divalent cations (Mg2+, Ca2+). However, under purely monovalent salt conditions (K+, Na+), TALEs bind to specific and non-specific DNA with nearly equal affinity. Divalent cations preferentially bind to DNA over monovalent cations, which attenuates non-specific interactions between TALEs and DNA and further stabilizes specific interactions. Overall, these results uncover new mechanistic insights into the binding action of TALEs and further provide potential avenues for engineering and application of TALE- or TALEN-based systems for genome editing and regulation.
Recombinant Human S100B C Diazepam Binding Inhibito DPO-4+ Buffer + Cations Multiple organ cancer tis Salt Binding (Disulfide Mouse Anti-Human Thyroxin ELISA Binding Buffer 10x ELISA WASH BUFFER, Pr ELISA Human , Corticoster E. coli SSB (Single Stran Mouse Anti-Folate Binding Mouse Monoclonal to Tar
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Cloning and characterisation of Na/K-ATPase and carbonic anhydrase from oriental river prawn Macrobrachium nipponense.Na/K-ATPase (NKA) and carbonic anhydrase (CA) are ion transporters that play important roles in osmotic pressure balance in crustaceans. Oriental river prawn (Macrobrachium nipponense) is one of the most economically important shrimps in China. This species can live in freshwater and low-salt water, but the molecular mechanism of salinity regulation is unclear. In this study, full-length cDNAs of M. nipponense α-NKA and CA were obtained by rapid amplification of cDNA ends (RACE)-PCR (GenBank accession numbers MH378774 and MH827971, respectively), and characterised. Full-length cDNAs of Mnα-NKA (3778bp) and MnCA (1407bp) contain open reading frames of 3030bp and 930bp, respectively, encoding polypeptides of 1009 and 930 amino acids. Bioinformatic analysis showed that Mnα-NKA and MnCA harbour the representative features of NKAs and CAs, and share high homology with orthologs in other crustaceans. Quantitative real-time PCR revealed that Mnα-NKA and MnCA were expressed in various tissues, with highest expression in posterior gills and hepatopancreas. Both Mnα-NKA and MnCA were up-regulated in response to salinity acclimation, but expression patterns differed. Our results provide a theoretical basis for the mechanism regulating salinity acclimation in M. nipponense.
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Tepidicella baoligensis sp. nov., A Novel Member of Betaproteobacterium Isolated from an Oil Reservoir.A Gram-negative, non-pigmented, aerobic bacterium, designated strain B18-50 was isolated from oil-well production water in Baolige oilfield, China. The strain was able to grow at pH 6.5-10.5 (optimum at pH 7.5-8.5), in 0-3% (w/v) NaCl (optimum at 0-0.5%, w/v) and at 20-60 °C (optimum at 45 °C). Cells of the isolate were motile with a single polar flagellum and non-spore-forming rods. Organic acids and amino acids were used as carbon and energy sources, but sugars and polyols were not assimilated. The major cellular fatty acids were C, Cω6c/ω7c, and Cω7c. Ubiquinone 8 was the predominant respiratory quinone. The major polar lipids consisted of phosphatidylethanolamine, phosphatidylglycerol, and diphosphatidylglycerol. The genomic DNA G+C content of the isolate was 62.8 mol%. Phylogenetic analysis based on 16S rRNA gene sequences revealed that strain B18-50 was most closely related to Tepidicella xavieri DSM 19605 (97.5% similarity). Comparative analysis of genotypic and phenotypic features indicate that strain B18-50 represents a novel species of the genus Tepidicella, for which the name Tepidicella baoligensis sp. nov. is proposed. The type strain is B18-50 (= CGMCC 1.13575 = KCTC 62779).
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The bile salt glycocholate induces global changes in gene and protein expression and activates virulence in enterotoxigenic Escherichia coli.Pathogenic bacteria use specific host factors to modulate virulence and stress responses during infection. We found previously that the host factor bile and the bile component glyco-conjugated cholate (NaGCH, sodium glycocholate) upregulate the colonization factor CS5 in enterotoxigenic Escherichia coli (ETEC). To further understand the global regulatory effects of bile and NaGCH, we performed Illumina RNA-Seq and found that crude bile and NaGCH altered the expression of 61 genes in CS5 + CS6 ETEC isolates. The most striking finding was high induction of the CS5 operon (csfA-F), its putative transcription factor csvR, and the putative ETEC virulence factor cexE. iTRAQ-coupled LC-MS/MS proteomic analyses verified induction of the plasmid-borne virulence proteins CS5 and CexE and also showed that NaGCH affected the expression of bacterial membrane proteins. Furthermore, NaGCH induced bacteria to aggregate, increased their adherence to epithelial cells, and reduced their motility. Our results indicate that CS5 + CS6 ETEC use NaGCH present in the small intestine as a signal to initiate colonization of the epithelium.
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CRISPR-Cas9 human gene replacement and phenomic characterization in to understand the functional conservation of human genes and decipher variants of uncertain significance.Our ability to sequence genomes has vastly surpassed our ability to interpret the genetic variation we discover. This presents a major challenge in the clinical setting, where the recent application of whole-exome and whole-genome sequencing has uncovered thousands of genetic variants of uncertain significance. Here, we present a strategy for targeted human gene replacement and phenomic characterization, based on CRISPR-Cas9 genome engineering in the genetic model organism , that will facilitate assessment of the functional conservation of human genes and structure-function analysis of disease-associated variants with unprecedented precision. We validate our strategy by demonstrating that direct single-copy replacement of the ortholog () with the critical human disease-associated gene phosphatase and tensin homolog () is sufficient to rescue multiple phenotypic abnormalities caused by complete deletion of , including complex chemosensory and mechanosensory impairments. In addition, we used our strategy to generate animals harboring a single copy of the known pathogenic lipid phosphatase inactive PTEN variant (PTEN-G129E), and showed that our automated phenotypic assays could accurately and efficiently classify this missense variant as loss of function. The integrated nature of the human transgenes allows for analysis of both homozygous and heterozygous variants and greatly facilitates high-throughput precision medicine drug screens. By combining genome engineering with rapid and automated phenotypic characterization, our strategy streamlines the identification of novel conserved gene functions in complex sensory and learning phenotypes that can be used as functional assays to decipher variants of uncertain significance.
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Slc4a8 in the Kidney: Expression, Subcellular Localization and Role in Salt Reabsorption.The sodium-dependent bicarbonate transporter Slc4a8 (a.k.a NDCBE) mediates the co-transport of sodium and bicarbonate in exchange for chloride. It is abundantly detected in the brain, with low expression levels in the kidney. The cell distribution and subcellular localization of Slc4a8 in the kidney and its role in acid/base and electrolyte homeostasis has been the subject of conflicting reports. There are no conclusive localization or functional studies to pinpoint the location and demonstrate the function of Slc4a8 in the kidney.
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Soil drenching of paclobutrazol: An efficient way to improve quinoa performance under salinity.Salinity extent and severity is rising because of poor management practices on agricultural lands, possibility lies to grow salt-tolerant crops with better management techniques. Therefore, a highly nutritive salt-tolerant crop quinoa with immense potential to contribute for future food security was selected for this investigation. Soil drenching of paclobutrazol (PBZ; 20 mg l ) was used to understand the ionic relations, gaseous exchange characteristics, oxidative defense system and yield under saline conditions (400 mM NaCl) including normal (0 mM NaCl) and no PBZ (0 mg l ) as controls. The results revealed that salinity stress reduced the growth and yield of quinoa through perturbing ionic homeostasis with the consequences of overproduction of reactive oxygen species (ROS), oxidative damages and reduced photosynthesis. PBZ improved the quinoa performance through regulation of ionic homeostasis by decreasing Na , Cl , while improving K , Mg and Ca concentration. It also enhanced the antioxidative system including ascorbic acid, phenylalanine ammonia-lyase, polyphenol oxidase and glutathione peroxidase, which scavenged the ROS (H O and O ) and lowered the oxidative damages (malondialdehyde level) under salinity in roots and more specifically in leaf tissues. The photosynthetic rate and stomatal conductance consequently improved (16 and 21%, respectively) in salt-stressed quinoa PBZ-treated compared to the non-treated ones and contributed to the improvement of panicle length (33%), 100-grain weight (8%) and grain yield (38%). Therefore, PBZ can be opted as a shotgun approach to improve quinoa performance and other crops under high saline conditions.
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Enhanced thermostability of halo-tolerant glutaminase from Bacillus licheniformis ATCC 14580 by immobilization onto nano magnetic cellulose sheet and its application in production of glutamic acid.A halo-tolerant glutaminase gene (BlglsA) was isolated from Bacillus licheniformis. Heterologous expression of BlglsA revealed that it encodes for a 36 kDa protein containing 327 amino acid residues. The purified enzyme showed optimal activity at a pH of 9.5 while 35 °C was found to be the optimum temperature. The enzyme retained about 92 and 97% stability at pH 12 and temperature (40 °C) respectively. Subsequent immobilization of BlglsA on nano magnetic cellulose sheet (NMCS) led to an enhanced tolerance to higher temperature. NMCS-BlglsA showed optimum activity at 45 °C, although it was stable even at 60 °C. NaCl tolerance (≥90% in 0.3 M) was almost similar to BlglsA and NMCS-BlglsA. The metal ions Fe (5 mM) and Mn (2.5 mM) improved the BlglsA relative activity by 61 and 48%, respectively. In contrast, 5 mM Mn was found suitable to enhance the activity of NMCS-BlglsA up to 72%. The production of glutamic acid by NMCS-BlglsA was 1.61 g/l in 48 h. Reusability test of NMCS-BlglsA showed 76 and 35% retention of the actual activity after 4th and 7th cycle, respectively. Such remarkable biochemical properties of NMCS-BlglsA make it an attractive enzyme for food industries.
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Functional characterization of salt-tolerant microbial esterase WDEst17 and its use in the generation of optically pure ethyl (R)-3-hydroxybutyrate.The two enantiomers of ethyl 3-hydroxybutyrate are important intermediates for the synthesis of a great variety of valuable chiral drugs. The preparation of chiral drug intermediates through kinetic resolution reactions catalyzed by esterases/lipases has been demonstrated to be an efficient and environmentally friendly method. We previously functionally characterized microbial esterase PHE21 and used PHE21 as a biocatalyst to generate optically pure ethyl (S)-3-hydroxybutyrate. Herein, we also functionally characterized one novel salt-tolerant microbial esterase WDEst17 from the genome of Dactylosporangium aurantiacum subsp. Hamdenensis NRRL 18085. Esterase WDEst17 was further developed as an efficient biocatalyst to generate (R)-3-hydroxybutyrate, an important chiral drug intermediate, with the enantiomeric excess being 99% and the conversion rate being 65.05%, respectively, after process optimization. Notably, the enantio-selectivity of esterase WDEst17 was opposite than that of esterase PHE21. The identification of esterases WDEst17 and PHE21 through genome mining of microorganisms provides useful biocatalysts for the preparation of valuable chiral drug intermediates.
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