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https://www.readbyqxmd.com/read/28346789/resolving-ultrafast-photoinduced-deactivations-in-water-solvated-pyrimidine-nucleosides
#1
Ana J Pepino, Javier Segarra-Martí, Artur Nenov, Roberto Improta, Marco Garavelli
For the first time, ultrafast deactivations of photo-excited water-solvated pyrimidine nucleosides are mapped employing hybrid QM(CASPT2)/MM(AMBER) optimizations that account for explicit solvation, sugar effects and dynamically correlated potential energy surfaces. Low energy S1/S0 ring-puckering and ring-opening conical intersections (CIs) are suggested to drive the ballistic coherent sub-ps (<200fs) decays observed in each pyrimidine, the energetics controlling this processes correlating with the lifetimes observed...
March 27, 2017: Journal of Physical Chemistry Letters
https://www.readbyqxmd.com/read/28346741/small-molecules-targeting-human-n-acetylmannosamine-kinase
#2
Stephan Hinderlich, Martin Neuenschwander, Paul-Robin Wratil, Andreas Oder, Michael Lisurek, Long D Nguyen, Jens Peter von Kries, Christian Hackenberger
N-Acetylmannosamine kinase (MNK) plays a key role in the biosynthesis of sialic acids and glycosylation of proteins. Sialylated glycoconjugates affect a large number of biological processes, including immune modulation and cancer transformation. For the search of effective inhibitors of MNK we applied high-throughput screening of drug-like small molecules. Applying different orthogonal assays for their validation we identified four potential MNK-specific inhibitors with IC50 values in the low micromolar range...
March 27, 2017: Chembiochem: a European Journal of Chemical Biology
https://www.readbyqxmd.com/read/28345931/predictable-conformational-diversity-in-foldamers-of-sugar-amino-acids
#3
Dora K Menyhard, Ilona Hudaky, Imre Jákli, György Juhász, András Perczel
Systematic conformational search was carried out for monomers and homohexamers of furanoid β-amino acids: cis-(S,R) and trans-(S,S) stereoisomers of aminocyclopentane carboxylic acid (ACPC), two different aminofuranuronic-acids (AFU(α) and AFU(β)), their isopropylidene derivatives (AFU(ip)) as well as the key intermediate β-aminotetrahydrofurancarboxylic acid (ATFC). Stereochemistry of the building blocks was chosen to match with that of natural sugar amino acid (xylose and ribose) precursors. Results show that hexamers of cis furanoid β-amino acids show great variability: while hydrophobic cyclopentane (cis(ACPC)6), and hydrophilic (cisXylAFU(α/β))6 foldamers favor two different zigzagged conformation as hexamers, the backbone fold turns into a helix in case of (cisATFC)6 (10-helix) and (cisAFU(ip))6 (14-helix)...
March 27, 2017: Journal of Chemical Information and Modeling
https://www.readbyqxmd.com/read/28345906/malonylginsenosides-with-potential-antidiabetic-activities-from-the-flower-buds-of-panax-ginseng
#4
Shi Qiu, Wen-Zhi Yang, Chang-Liang Yao, Xiao-Jian Shi, Jing-Ya Li, Yang Lou, Ya-Nan Duan, Wan-Ying Wu, De-An Guo
LC-MS-guided phytochemical isolation of malonylginsenosides, featuring neutral elimination of CO2 and C3H2O3 by the negative mode collision-induced dissociation, from the flower buds of Panax ginseng led to the isolation of 19 malonyl-substituted triterpenoid saponins. They include 15 new malonylginsenosides, malonylfloralginsenosides-Re1-Re3 (1-3), -Rb1 and -Rb2 (4, 5), -Rd1-Rd6 (6-11), and -Rc1-Rc4 (12-15), and the known m-Rb1, m-Rc, m-Rb2, and m-Rd (16-19). Compound 11 represents the first dimalonyl saponin isolated from the Panax genus, while 2-4, 9, and 10 are five ginsenosides with single malonylation at the C-20 sugar chain...
March 27, 2017: Journal of Natural Products
https://www.readbyqxmd.com/read/28345499/synbiotic-supplementation-in-lean-patients-with-non-alcoholic-fatty-liver-disease-a-pilot-randomised-double-blind-placebo-controlled-clinical-trial
#5
Fatemeh Mofidi, Hossein Poustchi, Zahra Yari, Babak Nourinayyer, Shahin Merat, Maryam Sharafkhah, Reza Malekzadeh, Azita Hekmatdoost
Although non-alcoholic fatty liver disease (NAFLD) is the leading aetiology of liver disorders in the world, there is no proven treatment for NAFLD patients with normal or low BMI. The aim of this study was to evaluate the efficacy of synbiotics supplementation in NAFLD patients with normal or low BMI. In this randomised, double-blind, placebo-controlled, clinical trial, fifty patients with NAFLD were assigned to take either a synbiotic supplement or a placebo capsule for 28 weeks. Both groups were advised to follow a healthy lifestyle...
March 27, 2017: British Journal of Nutrition
https://www.readbyqxmd.com/read/28345493/genetic-risk-scores-sex-and-dietary-factors-interact-to-alter-serum-uric-acid-trajectory-among-african-american-urban-adults
#6
May A Beydoun, Jose-Atilio Canas, Marie T Fanelli-Kuczmarski, Salman M Tajuddin, Michele K Evans, Alan B Zonderman
Serum uric acid (SUA), a causative agent for gout among others, is affected by both genetic and dietary factors, perhaps differentially by sex. We evaluated cross-sectional (SUAbase) and longitudinal (SUArate) associations of SUA with a genetic risk score (GRS), diet and sex. We then tested the interactive effect of GRS, diet and sex on SUA. Longitudinal data on 766 African-American urban adults participating in the Healthy Aging in Neighborhood of Diversity across the Lifespan study were used. In all, three GRS for SUA were created from known SUA-associated SNP (GRSbase (n 12 SNP), GRSrate (n 3 SNP) and GRStotal (n 15 SNP))...
March 27, 2017: British Journal of Nutrition
https://www.readbyqxmd.com/read/28345135/eliminating-cows-milk-but-not-wheat-barley-or-rye-increases-the-risk-of-growth-deceleration-and-nutritional-inadequacies
#7
Jetta Tuokkola, Päivi Luukkainen, Jaakko Nevalainen, Suvi Ahonen, Jorma Toppari, Jorma Ilonen, Riitta Veijola, Mikael Knip, Suvi M Virtanen, Minna Kaila
AIM: Our study examined the growth and nutritional intake of children on milk and, or, wheat, barley or rye elimination diets. METHODS: This was a nested case-control study within the Finnish Type 1 Diabetes Prediction and Prevention Study. It investigated 295 children born in the Tampere University Hospital area between 1997-2004 on a diet without cows' milk and, or, wheat, barley or rye due to food allergies and 265 matched controls. Nutritional intake was recorded with three-day food records at the ages of one, two and three years...
March 27, 2017: Acta Paediatrica
https://www.readbyqxmd.com/read/28344780/abnormal-glycosylation-in-joubert-syndrome-type-10
#8
Megan S Kane, Mariska Davids, Michelle R Bond, Christopher J Adams, Megan E Grout, Ian G Phelps, Diana R O'Day, Jennifer C Dempsey, Xeuli Li, Gretchen Golas, Gilbert Vezina, Meral Gunay-Aygun, John A Hanover, Dan Doherty, Miao He, May Christine V Malicdan, William A Gahl, Cornelius F Boerkoel
BACKGROUND: The discovery of disease pathogenesis requires systematic agnostic screening of multiple homeostatic processes that may become deregulated. We illustrate this principle in the evaluation and diagnosis of a 5-year-old boy with Joubert syndrome type 10 (JBTS10). He carried the OFD1 mutation p.Gln886Lysfs*2 (NM_003611.2: c.2656del) and manifested features of Joubert syndrome. METHODS: We integrated exome sequencing, MALDI-TOF mass spectrometry analyses of plasma and cultured dermal fibroblasts glycomes, and full clinical evaluation of the proband...
2017: Cilia
https://www.readbyqxmd.com/read/28344649/overexpression-of-a-domain-of-unknown-function-266-containing-protein-results-in-high-cellulose-content-reduced-recalcitrance-and-enhanced-plant-growth-in-the-bioenergy-crop-populus
#9
Yongil Yang, Chang Geun Yoo, Hao-Bo Guo, William Rottmann, Kimberly A Winkeler, Cassandra M Collins, Lee E Gunter, Sara S Jawdy, Xiaohan Yang, Hong Guo, Yunqiao Pu, Arthur J Ragauskas, Gerald A Tuskan, Jin-Gui Chen
BACKGROUND: Domain of Unknown Function 266 (DUF266) is a plant-specific domain. DUF266-containing proteins (DUF266 proteins) have been categorized as 'not classified glycosyltransferases (GTnc)' due to amino acid similarity with GTs. However, little is known about the function of DUF266 proteins. RESULTS: Phylogenetic analysis revealed that DUF266 proteins are only present in the land plants including moss and lycophyte. We report the functional characterization of one member of DUF266 proteins in Populus, PdDUF266A...
2017: Biotechnology for Biofuels
https://www.readbyqxmd.com/read/28344648/cellulosic-ethanol-production-via-consolidated-bioprocessing-by-a-novel-thermophilic-anaerobic-bacterium-isolated-from-a-himalayan-hot-spring
#10
Nisha Singh, Anshu S Mathur, Deepak K Tuli, Ravi P Gupta, Colin J Barrow, Munish Puri
BACKGROUND: Cellulose-degrading thermophilic anaerobic bacterium as a suitable host for consolidated bioprocessing (CBP) has been proposed as an economically suited platform for the production of second-generation biofuels. To recognize the overall objective of CBP, fermentation using co-culture of different cellulolytic and sugar-fermenting thermophilic anaerobic bacteria has been widely studied as an approach to achieving improved ethanol production. We assessed monoculture and co-culture fermentation of novel thermophilic anaerobic bacterium for ethanol production from real substrates under controlled conditions...
2017: Biotechnology for Biofuels
https://www.readbyqxmd.com/read/28344647/ternary-ionic-liquid-water-pretreatment-systems-of-an-agave-bagasse-and-municipal-solid-waste-blend
#11
Jose A Perez-Pimienta, Noppadon Sathitsuksanoh, Vicki S Thompson, Kim Tran, Teresa Ponce-Noyola, Vitalie Stavila, Seema Singh, Blake A Simmons
BACKGROUND: Pretreatment is necessary to reduce biomass recalcitrance and enhance the efficiency of enzymatic saccharification for biofuel production. Ionic liquid (IL) pretreatment has gained a significant interest as a pretreatment process that can reduce cellulose crystallinity and remove lignin, key factors that govern enzyme accessibility. There are several challenges that need to be addressed for IL pretreatment to become viable for commercialization, including IL cost and recyclability...
2017: Biotechnology for Biofuels
https://www.readbyqxmd.com/read/28344584/lanthanum-affects-bell-pepper-seedling-quality-depending-on-the-genotype-and-time-of-exposure-by-differentially-modifying-plant-height-stem-diameter-and-concentrations-of-chlorophylls-sugars-amino-acids-and-proteins
#12
Atonaltzin García-Jiménez, Fernando C Gómez-Merino, Olga Tejeda-Sartorius, Libia I Trejo-Téllez
Lanthanum (La) is considered a beneficial element, capable of inducing hormesis. Hormesis is a dose-response relationship phenomenon characterized by low-dose stimulation and high-dose inhibition. Herein we tested the effect of 0 and 10 μM La on growth and biomolecule concentrations of seedlings of four sweet bell pepper (Capsicum annuum L.) varieties, namely Sven, Sympathy, Yolo Wonder, and Zidenka. Seedling evaluations were performed 15 and 30 days after treatment applications (dat) under hydroponic greenhouse conditions...
2017: Frontiers in Plant Science
https://www.readbyqxmd.com/read/28344453/high-intensity-exercise-and-carbohydrate-supplementation-do-not-alter-plasma-visfatin
#13
Paul F Mellick, Bryan J Feger, Douglas J Oberlin, Paul G Davis, Laurie Wideman
The purpose of the study was to examine the effect of high-intensity exercise and carbohydrate supplementation (CHO) on plasma visfatin. On 2 separate days, 10 sprint-trained males (age = 26.4 ± 5.3 yr; Ht = 1.77 ± 0.03 m; Wt = 78.78 ± 9.10 kg; BF% = 13.96 ± 7.28%) completed 4, 3-min bouts of cycling at 50% mean anaerobic power, with 6 min of rest between bouts. On CHO day, subjects ingested 50g of CHO 30 min before exercise. On control day, subjects ingested a sugar-free drink (CON) 30 min before exercise...
March 2017: Journal of Sports Science & Medicine
https://www.readbyqxmd.com/read/28344419/determinants-of-treatment-modification-in-hypercholesterolemic-patients
#14
Ko-Fan Wang, Cheng-Hsueh Wu, Chun-Chin Chang, Lung-Ching Chen, Kang-Ling Wang, Tse-Min Lu, Shing-Jong Lin, Chern-En Chiang
BACKGROUND: There is a lack of knowledge of those contemporary factors associated with modifying subtherapeutic treatments in hypercholesterolemic patients. The aim of this study was to assess determinants of treatment modification in patients not attaining their low-density lipoprotein cholesterol goals. METHODS: The CEntralized Pan-Asian survey on tHE Under-treatment of hypercholeSterolemia enrolled patients taking stable lipid-lowering medications. The study physicians then determined existing patient treatments, which were to be continued or modified when treatments failed...
March 2017: Acta Cardiologica Sinica
https://www.readbyqxmd.com/read/28344124/comparative-genomics-of-transport-proteins-in-probiotic-and-pathogenic-escherichia-coli-and-salmonella-enterica-strains
#15
Jimmy Do, Hassan Zafar, Milton H Saier
Escherichia coli is a genetically diverse species that can be pathogenic, probiotic, commensal, or a harmless laboratory strain. Pathogenic strains of E. coli cause urinary tract infections, diarrhea, hemorrhagic colitis, and pyelonephritis, while the two known probiotic E. coli strains combat inflammatory bowel disease and play a role in immunomodulation. Salmonella enterica, a close relative of E. coli, includes two important pathogenic serovars, Typhi and Typhimurium, causing typhoid fever and enterocolitis in humans, respectively, with the latter strain also causing a lethal typhoid fever-like disease in mice...
March 23, 2017: Microbial Pathogenesis
https://www.readbyqxmd.com/read/28344024/putative-model-based-on-itraq-proteomics-for-spirulina-morphogenesis-mechanisms
#16
Fu-Shuang Wang, Shi-Rui Dong, Hong-Yu Zhang, Su-Ying Wang
The morphology of Spirulina during cultivation is susceptible to external interferences, but the morphogenesis mechanism is still unclear. Here the proteomic changes of linear Spirulina and spiral Spirulina were comparatively investigated via isobaric tag for relative and absolute quantitation (iTRAQ). Totally 165 and 167 differences in proteins expression were screened out from the TJSD2/TJSD3 and TJBC4-1/TJBC4-2 groups, respectively. Gene ontology and metabolic pathway analysis of differences in proteins expression uncovered the metabolic pathways (photosynthesis, carbon fixation, sugar metabolism) that were significantly enriched with the proteins correlated with Spirulina morphogenesis...
March 23, 2017: Journal of Proteomics
https://www.readbyqxmd.com/read/28343860/mesophilic-continuous-fermentative-hydrogen-production-from-acid-pretreated-de-oiled-jatropha-waste-hydrolysate-using-immobilized-microorganisms
#17
Gopalakrishnan Kumar, Periyasamy Sivagurunathan, Biswarup Sen, Sang-Hyoun Kim, Chiu-Yue Lin
Mesophilic hydrogen production from acid pretreated hydrolysate (biomass concentration of 100g/L and 2% hydrochloric acid) of de-oiled jatropha waste was carried out in continuous system using immobilized microorganisms at various hydraulic retention times (HRTs) ranging from 48 to 12h. The experimental results of the reusability of immobilized microorganisms showed their stability up to 10 cycles with an average cumulative hydrogen production of 770mL/L. The peak hydrogen production rate and hydrogen yield were 0...
March 11, 2017: Bioresource Technology
https://www.readbyqxmd.com/read/28343242/identification-of-a-polysaccharide-produced-by-the-pyruvate-overproducer-candida-glabrata-cctcc-m202019
#18
Zhengshan Luo, Song Liu, Guocheng Du, Jingwen Zhou, Jian Chen
Candida glabrata has great potential for the accumulation of pyruvate as a preferred strain in pyruvate production by fermentation. However, its substrate conversion rate is relatively low. In this study, a novel polysaccharide containing α-1,4-glucosidic bonds was observed accidentally in screening a high-titer pyruvate strain by atmospheric and room temperature plasma mutagenesis of C. glabrata. Chemical analysis of the partially purified polysaccharide S4-C10 showed the main components were 1.2% (w/w) protein and 94...
March 25, 2017: Applied Microbiology and Biotechnology
https://www.readbyqxmd.com/read/28342969/structural-and-genetic-characterization-of-the-o-antigen-of-enterobacter-cloacae-c5529-related-to-the-o-antigen-of-e-%C3%A2-cloacae-g3054
#19
Runhua Han, Andrei V Perepelov, Yuanyuan Wang, Andrei V Filatov, Min Wang, Alexander S Shashkov, Lei Wang, Yuriy A Knirel
On mild acid degradation of the lipopolysaccharide of Enterobacter cloacae C5529, the O-polysaccharide chain was cleaved at the linkages of 5,7-diacetamido-3,5,7,9-tetradeoxy-l-glycero-l-manno-non-2-ulosonic acid (di-N-acetylpseudaminic acid, Psep5Ac7Ac). The resultant oligosaccharide and an alkali-treated lipopolysaccharide were studied by sugar analysis along with (1)H and (13)C NMR spectroscopy, and the following structure of the tetrasaccharide repeating unit of the O-polysaccharide was established: →4)-β-Psep5Ac7Ac-(2 → 3)-β-d-Galp-(1 → 6)-β-d-Galf-(1 → 3)-α-d-Galp-(1→ It differs from a structurally related O-polysaccharide of E...
February 28, 2017: Carbohydrate Research
https://www.readbyqxmd.com/read/28342968/heterologous-expression-purification-and-characterization-of-three-novel-esterases-secreted-by-the-lignocellulolytic-fungus-penicillium-purpurogenum-when-grown-on-sugar-beet-pulp
#20
Gabriela Oleas, Eduardo Callegari, Romina Sepúlveda, Jaime Eyzaguirre
The lignocellulolytic fungus, Penicillium purpurogenum, grows on a variety of natural carbon sources, among them sugar beet pulp. Culture supernatants of P. purpurogenum grown on sugar beet pulp were partially purified and the fractions obtained analyzed for esterase activity by zymograms. The bands with activity on methyl umbelliferyl acetate were subjected to mass spectrometry to identify peptides. The peptides obtained were probed against the proteins deduced from the genome sequence of P. purpurogenum...
March 18, 2017: Carbohydrate Research
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