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https://www.readbyqxmd.com/read/28733903/the-effect-of-aspartate-supplementation-on-the-microbial-composition-and-innate-immunity-on-mice
#1
Peng Bin, Shaojuan Liu, Shuai Chen, Zhaoying Zeng, Ruilin Huang, Yulong Yin, Gang Liu
The study was conducted to investigate the changes of intestinal microbiota composition and innate immunity with different dietary dosages of aspartate (Asp) supplementation. Thirty-six female ICR mice were divided randomly to four groups and thereafter fed the basal diets (controls) or those supplemented with additional 0.5, 1.0 and 2.0% aspartate. After 2 week feeding, microbial composition in ileum and feces, gene expression of pro-inflammatory cytokine, and innate immune factors in ileum were determined...
July 21, 2017: Amino Acids
https://www.readbyqxmd.com/read/28731544/localized-mrs-reliability-of-in-vivo-glutamate-at-3%C3%A2-t-in-shortened-scan-times-a-feasibility-study
#2
J Eric Jensen, Randy P Auerbach, Angela Pisoni, Diego A Pizzagalli
Glutamate is the prime excitatory neurotransmitter in the mammalian brain and has been implicated in a wide range of psychiatric conditions. To improve the applicability and clinical reach of magnetic resonance spectroscopy (MRS), research is needed to develop shortened, yet reliable, MRS scanning procedures for standard 1.5-3-T clinical magnetic resonance imaging (MRI) systems, particularly with young or vulnerable populations unable to tolerate longer protocols. To this end, we evaluated the test-retest reliability of a shortened J-resolved MRS sequence in healthy adolescents (n = 22) aged 12-14 years...
July 21, 2017: NMR in Biomedicine
https://www.readbyqxmd.com/read/28731187/isolation-and-purification-of-novel-peptides-derived-from-sepia-ink-effects-on-apoptosis-of-prostate-cancer-cell-pc%C3%A2-3
#3
Fangfang Huang, Yinwen Jing, Guofang Ding, Zuisu Yang
Novel prostate cancer therapeutics are in high demand. In order to identify potential therapeutic targets, protein from sepia ink was hydrolyzed by utilizing pepsin in an orthogonal array design. Pepsin hydrolysate (SH) obtained at optimal conditions exhibited the highest antitumor activity. Subsequently, a novel antitumor peptide, which was termed SHP, was isolated through ultrafiltration, gel filtration chromatography and reversed phase high‑performance liquid chromatography. The amino acid sequence of SHP was identified as Leu‑Lys‑Glu‑Glu‑Asn‑Arg‑Arg‑Arg‑Arg‑Asp with a molecular mass of 1371...
July 21, 2017: Molecular Medicine Reports
https://www.readbyqxmd.com/read/28729308/the-effect-of-combined-resistance-exercise-training-and-vitamin-d3-supplementation-on-musculoskeletal-health-and-function-in-older-adults-a-systematic-review-and-meta-analysis
#4
Anneka Elizabeth Antoniak, Carolyn A Greig
OBJECTIVES: In older adults, there is a blunted responsiveness to resistance training and reduced muscle hypertrophy compared with younger adults. There is evidence that both exercise training and vitamin D supplementation may benefit musculoskeletal health in older adults, and it is plausible that in combination their effects may be additive. The aim of this systematic review was to evaluate the effectiveness of combined resistance exercise training and vitamin D3 supplementation on musculoskeletal health in older adults...
July 20, 2017: BMJ Open
https://www.readbyqxmd.com/read/28728943/production-and-biophysical-characterization-of-a-mini-membrane-protein-ost4v23d-a-functionally-important-mutant-of-yeast-oligosaccharyltransferase-subunit-ost4p
#5
Bharat Chaudhary, Suman Mazumder, Smita Mohanty
N-linked glycosylation of proteins is an essential and highly conserved co- and post-translational protein modification reaction that occurs in all eukaryotes. Oligosaccharyltransferase (OST), a multi-subunit membrane-associated enzyme complex, carries out this reaction. In the central reaction, a carbohydrate group is transferred to the side chain of a consensus asparagine residue in the newly synthesized protein. Genetic defects in humans cause a series of disorders known as congenital disorders of glycosylation (CDG) that include mental retardation, developmental delay, hypoglycemia etc...
July 17, 2017: Protein Expression and Purification
https://www.readbyqxmd.com/read/28728499/acute-central-nervous-system-complications-and-ammonium-levels-in-adult-patients-with-acute-lymphoblastic-leukemia-receiving-l-asparaginase
#6
Nicole Strickler, Stefan Balabanov, Katharina Casauro, Urs Schanz, Markus G Manz, Bernhard Gerber
We analyzed ammonium levels and acute central nervous complications in adult patients receiving chemotherapy for acute lymphoblastic leukemia with or without asparaginase (l-asp). Twenty patients with a median age of 40.3 years were included. Ammonium-levels were measured during 88 chemotherapy cycles, 60 cycles (68%) with l-asp, and 28 cycles (32%) without l-asp. Ammonium was elevated in 87% of all l-asp containing cycles, with median ammonium levels of 169 μmol/l (interquartile range (IQR) 91-269 μmol/l)...
July 21, 2017: Leukemia & Lymphoma
https://www.readbyqxmd.com/read/28727046/the-ileal-digestibility-of-most-amino-acids-is-greater-in-red-dog-than-in-wheat-middlings-when-fed-to-growing-pigs
#7
G A Casas, H H Stein
The objective of this experiment was to determine the apparent ileal digestibility (AID) and the standardized ileal digestibility (SID) of CP and AA in 10 sources of wheat middlings and in 1 source of red dog. Ten diets that each contained 1 of the 10 sources of wheat middlings and 1 diet that contained red dog as the only source of protein and AA were formulated. An N-free diet was used to determine basal endogenous losses of CP and AA. Chromic oxide (0.4%) was added to all diets as an indigestible marker...
June 2017: Journal of Animal Science
https://www.readbyqxmd.com/read/28726913/mechanistic-insights-into-dioxygen-activation-oxygen-atom-exchange-and-substrate-epoxidation-by-asqj-dioxygenase-from-quantum-mechanical-molecular-mechanical-calculations
#8
Xudan Song, Jiarui Lu, Wenzhen Lai
Herein, we use in-protein quantum mechanical/molecular mechanical (QM/MM) calculations to elucidate the mechanism of dioxygen activation, oxygen atom exchange and substrate epoxidation processes by AsqJ, an Fe(II)/α-ketoglutarate-dependent dioxygenase (α-KGD) using a 2-His-1-Asp facial triad. Our results demonstrated that the whole reaction proceeds through a quintet surface. The dioxygen activation by AsqJ leads to a quintet penta-coordinated Fe(IV)-oxo species, which has a square pyramidal geometry with the oxo group trans to His134...
July 20, 2017: Physical Chemistry Chemical Physics: PCCP
https://www.readbyqxmd.com/read/28726636/live-cell-visualization-of-gasdermin-d-driven-pyroptotic-cell-death
#9
Joseph K Rathkey, Bryan L Benson, Steven M Chirieleison, Jie Yang, Tsan S Xiao, George R Dubyak, Alex Y Huang, Derek W Abbott
Pyroptosis is a form of cell death important in defenses against pathogens, but which can also result in a potent and sometimes pathological inflammatory response. During pyroptosis, gasdermin D (GSDMD), the pore-forming effector protein, is cleaved, forms oligomers, and inserts into the membranes of the cell, resulting in rapid cell death. However, the potent cell death induction caused by GSDMD has complicated our ability to understand the biology of this protein. Studies aimed at visualizing GSDMD have relied on expression of GSDMD fragments in epithelial cell lines that naturally lack GSDMD expression and also lack the proteases necessary to cleave GSDMD...
July 18, 2017: Journal of Biological Chemistry
https://www.readbyqxmd.com/read/28724772/binding-of-hsv-1-ul20-to-godz-affects-its-palmitoylation-and-is-essential-for-infectivity-and-proper-targeting-and-localization-of-ul20-and-gk
#10
Shaohui Wang, Kevin R Mott, Kolja Wawrowsky, Konstantin G Kousoulas, Bernhard Luscher, Homayon Ghiasi
HSV-1 UL20 plays a crucial role in the envelopment of the cytoplasmic virion and its egress. It is a non-glycosylated envelope protein that is regulated as a γ1 gene. Two-hybrid and pull-down assays demonstrated that UL20, but no other HSV-1 gene-encoded proteins, binds specifically to GODZ (a.k.a.: DHHC3), a cellular Golgi-specific Asp-His-His-Cys (DHHC) zinc finger protein. A catalytically inactive dominant-negative GODZ construct significantly reduced HSV-1 replication in vitro and affected the localization of UL20 and gK and their interactions but not gC...
July 19, 2017: Journal of Virology
https://www.readbyqxmd.com/read/28723955/crystal-structure-and-functional-characterization-of-an-isoaspartyl-dipeptidase-cpsiada-from-colwellia-psychrerythraea-strain-34h
#11
Sun-Ha Park, Chang Woo Lee, Sung Gu Lee, Seung Chul Shin, Hak Jun Kim, Hyun Park, Jun Hyuck Lee
Isoaspartyl dipeptidase (IadA) is an enzyme that catalyzes the hydrolysis of an isoaspartyl dipeptide-like moiety, which can be inappropriately formed in proteins, between the β-carboxyl group side chain of Asp and the amino group of the following amino acid. Here, we have determined the structures of an isoaspartyl dipeptidase (CpsIadA) from Colwellia psychrerythraea, both ligand-free and that complexed with β-isoaspartyl lysine, at 1.85-Å and 2.33-Å resolution, respectively. In both structures, CpsIadA formed an octamer with two Zn ions in the active site...
2017: PloS One
https://www.readbyqxmd.com/read/28723223/free-energy-of-binding-and-mechanism-of-interaction-for-the-meevd-tpr2a-peptide-protein-complex
#12
Mauro Lapelosa
The association between the MEEVD C-terminal peptide from the heat shock protein 90 (Hsp90) and tetratricopeptide repeat A (TPR2A) domain of the heat shock organizing protein (Hop) is a useful prototype to study the fundamental molecular details about the Hop-Hsp90 interaction. We study here the mechanism of binding/unbinding, and compute the standard binding free energy and potential of mean force for the association of the MEEVD peptide to the TPR2A domain using the Adaptive Biasing Force (ABF) methodology...
July 19, 2017: Journal of Chemical Theory and Computation
https://www.readbyqxmd.com/read/28722494/cost-efficiency-analyses-for-the-us-of-biosimilar-filgrastim-sndz-reference-filgrastim-pegfilgrastim-and-pegfilgrastim-with-on-body-injector-in-the-prophylaxis-of-chemotherapy-induced-febrile-neutropenia
#13
Ali McBride, Kim Campbell, Mohan Bikkina, Karen MacDonald, Ivo Abraham, Sanjeev Balu
AIMS: Guidelines recommend prophylaxis with granulocyte colony-stimulating factor for chemotherapy-induced (febrile) neutropenia (CIN/FN) based on regimen myelotoxicity and patient-related risk factors. Our aim was to conduct a cost-efficiency analysis for the US of the direct acquisition and administration costs of the recently approved biosimilar filgrastim-sndz (Zarxio® EP2006) with reference filgrastim (Neupogen(®)), pegfilgrastim (Neulasta(®)), and pegfilgrastim injection device (Neulasta Onpro(®); hereafter pegfilgrastim-injector) for CIN/FN prophylaxis...
July 19, 2017: Journal of Medical Economics
https://www.readbyqxmd.com/read/28722263/ftsad2-and-ftjaz1-regulate-activity-of-the-ftmyb11-transcription-repressor-of-the-phenylpropanoid-pathway-in-fagopyrum-tataricum
#14
Meiliang Zhou, Zhanmin Sun, Mengqi Ding, Maria D Logacheva, Ivan Kreft, Dan Wang, Mingli Yan, Jirong Shao, Yixiong Tang, Yanmin Wu, Xuemei Zhu
Little is known about the molecular mechanism of the R2R3-MYB transcriptional repressors involved in plant phenylpropanoid metabolism. Here, we describe one R2R3-type MYB repressor, FtMYB11 from Fagopyrum tataricum. It contains the SID-like motif GGDFNFDL and it is regulated by both the importin protein 'Sensitive to ABA and Drought 2' (SAD2) and the jasmonates signalling cascade repressor JAZ protein. Yeast two hybrid and bimolecular fluorescence complementation assays demonstrated that FtMYB11 interacts with SAD2 and FtJAZ1...
July 19, 2017: New Phytologist
https://www.readbyqxmd.com/read/28720122/enhance-the-performance-of-current-scoring-functions-with-the-aid-of-3d-protein-ligand-interaction-fingerprints
#15
Jie Liu, Minyi Su, Zhihai Liu, Jie Li, Yan Li, Renxiao Wang
BACKGROUND: In structure-based drug design, binding affinity prediction remains as a challenging goal for current scoring functions. Development of target-biased scoring functions provides a new possibility for tackling this problem, but this approach is also associated with certain technical difficulties. We previously reported the Knowledge-Guided Scoring (KGS) method as an alternative approach (BMC Bioinformatics, 2010, 11, 193-208). The key idea is to compute the binding affinity of a given protein-ligand complex based on the known binding data of an appropriate reference complex, so the error in binding affinity prediction can be reduced effectively...
July 18, 2017: BMC Bioinformatics
https://www.readbyqxmd.com/read/28719588/structures-of-carboxylic-acid-reductase-reveal-domain-dynamics-underlying-catalysis
#16
Deepankar Gahloth, Mark S Dunstan, Daniela Quaglia, Evaldas Klumbys, Michael P Lockhart-Cairns, Andrew M Hill, Sasha R Derrington, Nigel S Scrutton, Nicholas J Turner, David Leys
Carboxylic acid reductase (CAR) catalyzes the ATP- and NADPH-dependent reduction of carboxylic acids to the corresponding aldehydes. The enzyme is related to the nonribosomal peptide synthetases, consisting of an adenylation domain fused via a peptidyl carrier protein (PCP) to a reductase termination domain. Crystal structures of the CAR adenylation-PCP didomain demonstrate that large-scale domain motions occur between the adenylation and thiolation states. Crystal structures of the PCP-reductase didomain reveal that phosphopantetheine binding alters the orientation of a key Asp, resulting in a productive orientation of the bound nicotinamide...
July 17, 2017: Nature Chemical Biology
https://www.readbyqxmd.com/read/28717037/impact-of-a-carbapenem-antimicrobial-stewardship-program-on-patient-outcomes
#17
Valerie Xue Fen Seah, Rina Yue Ling Ong, Ashley Shi Yuan Lim, Chia Yin Chong, Natalie Woon Hui Tan, Koh Cheng Thoon
Antimicrobial stewardship programs (ASPs) aim to improve appropriate antimicrobials use. However, concerns of the negative consequences from accepting ASP interventions exist, particularly when de-escalation or discontinuation of broad-spectrum antibiotics are recommended. Hence, we sought to evaluate the impact on clinical outcomes when ASP interventions for inappropriate carbapenem use were accepted or rejected by primary providers.We retrospectively reviewed all carbapenem prescriptions deemed inappropriate according to institutional guidelines with ASP interventions between July 2011 and December 2014...
July 17, 2017: Antimicrobial Agents and Chemotherapy
https://www.readbyqxmd.com/read/28715181/structural-insights-into-selective-ligand-receptor-interactions-leading-to-receptor-inactivation-utilizing-selective-melanocortin-3-receptor-antagonists
#18
Minying Cai, Udaya Kiran Marelli, Blake Mertz, Johannes G Beck, Florian Opperer, Florian Rechenmacher, Horst Kessler, Victor J Hruby
Systematic N-methylated derivatives of the melanocortin receptor ligand, SHU9119, lead to mul-tiple binding and functional selectivity towards melanocortin receptors. However, the relationship between N-methylation-induced conformational changes in the peptide backbone and side chains and melanocortin receptor selectivity is still unknown. We conducted comprehensive conforma-tional studies in solution of two selective antagonists of the third isoform of the melanocortin re-ceptor (hMC3R), namely, Ac-Nle-c[Asp-NMe-His6-D-Nal(2')7-NMe-Arg8-Trp9-Lys]-NH2 (15) and Ac-Nle-c[Asp-His6-D-Nal(2')7-NMe-Arg8-NMe-Trp9-NMe-Lys]-NH2 (17)...
July 17, 2017: Biochemistry
https://www.readbyqxmd.com/read/28714807/structural-analysis-spectroscopic-characterization-and-molecular-docking-studies-of-the-cyclic-heptapeptide
#19
Sefa Celik, Serda Kecel-Gunduz, Sevim Akyuz, Aysen E Ozel
The theoretically possible stable conformer of the cyclic heptapeptide, that has significant anti-metastatic activity, was examined by conformational analysis followed by DFT calculations. Experimental infrared and Raman spectroscopy, together with theoretical DFT (6-31G (d,p) basis set)-based quantum chemical calculations, have been used to understand the structural and spectral characteristics of cyclo(Gly-Arg-Gly-Asp-Ser-Pro-Ala) {cyclo(GRGDSPA)}. A complete analysis of the vibrational spectrum has been reported on the basis of potential energy distribution (PED %) data of the vibrational modes...
July 17, 2017: Journal of Biomolecular Structure & Dynamics
https://www.readbyqxmd.com/read/28711760/investigation-of-the-binding-free-energies-of-fda-approved-drugs-against-subtype-b-and-c-sa-hiv-pr-oniom-approach
#20
Z K Sanusi, T Govender, G E M Maguire, S B Maseko, J Lin, H G Kruger, B Honarparvar
Human immune virus subtype C is the most widely spread HIV subtype in Sub-Sahara Africa and South Africa. A profound structural insight on finding potential lead compounds is therefore necessary for drug discovery. The focus of this study is to rationalize the nine Food and Drugs Administration (FDA) HIV antiviral drugs complexed to subtype B and C-SA PR using ONIOM approach. To achieve this, an integrated two-layered ONIOM model was used to optimize the geometrics of the FDA approved HIV-1 PR inhibitors for subtype B...
June 29, 2017: Journal of Molecular Graphics & Modelling
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