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https://www.readbyqxmd.com/read/28636006/copper-ion-interaction-with-the-rnase-catalytic-site-fragment-of-the-angiogenin-protein-an-experimental-and-theoretical-investigation
#1
Antonio Magrì, Giovanni Tabbì, Raffaella Breglia, Luca De Gioia, Piercarlo Fantucci, Maurizio Bruschi, Raffaele P Bonomo, Diego La Mendola
The angiogenin protein (Ang) is a member of the vertebrate-specific secreted ribonucleases and one of the most potent angiogenic factors known. Ang is a normal constituent of human plasma and its concentration increases under some physiological and pathological conditions to promote neovascularization. Ang was originally identified as an angiogenic tumour factor, but its biological activity has been found to extend from inducing angiogenesis to promoting cell survival in different neurodegenerative diseases...
June 21, 2017: Dalton Transactions: An International Journal of Inorganic Chemistry
https://www.readbyqxmd.com/read/28635676/comment-on-melanisation-of-aspergillus-terreus-is-butyrolactone-i-involved-in-the-regulation-of-both-dopa-and-dhn-types-of-pigments-in-submerged-culture-microorganisms-2017-5-22
#2
Elena Geib, Matthias Brock
A recent article by Palonen et al. describes the effect of butyrolactone I on the expression of a secondary metabolite biosynthesis gene cluster from Aspergillus terreus that shows similarities to fusarubin biosynthesis gene clusters from Fusarium species. The authors claim that two different types of pigments are formed in Aspergillus terreus conidia, whereby one pigment is termed a DOPA-type melanin and the second a DHN-type melanin. Unfortunately, the terminology of the classification of melanin-types requires revision as Asp-melanin present in A...
June 21, 2017: Microorganisms
https://www.readbyqxmd.com/read/28633399/the-interfacial-character-of-antibody-paratopes-analysis-of-antibody-antigen-structures
#3
Minh N Nguyen, Mohan R Pradhan, Chandra Verma, Pingyu Zhong
Summary: In this study, computational methods are applied to investigate the general properties of antigen engaging residues of a paratope from a non-redundant dataset of 403 antibody-antigen complexes to dissect the contribution of hydrogen bonds, hydrophobic, van der Waals contacts and ionic interactions, as well as role of water molecules in the antigen-antibody interface. Consistent with previous reports using smaller datasets, we found that Tyr, Trp, Ser, Asn, Asp, Thr, Arg, Gly, His contribute substantially to the interactions between antibody and antigen...
June 15, 2017: Bioinformatics
https://www.readbyqxmd.com/read/28632884/components-of-the-alternative-complement-pathway-in-patients-with-psoriasis
#4
Betul Sereflican, Guler Bugdayci
INTRODUCTION: Psoriasis is a chronic inflammatory skin disease. Adipose tissue plays important roles in the events that regulate body metabolism. This study determined the levels of complement 3 ( C3), acylation-stimulating protein (ASP), and adipsin, which take part in the alternate complement pathway, and are synthesized in and secreted by adipose tissue. METHODS: Thirty-two patients with psoriasis were matched with 22 controls in terms of age, sex, body mass index, and lipid profiles...
June 2017: Acta Dermatovenerologica Alpina, Panonica, et Adriatica
https://www.readbyqxmd.com/read/28631237/structural-characterization-of-pyoverdines-produced-by-pseudomonas-putida-kt2440-and-pseudomonas-taiwanensis-vlb120
#5
Matthias Baune, Yulin Qi, Karen Scholz, Dietrich A Volmer, Heiko Hayen
The previously unknown sequences of several pyoverdines (PVD) produced by a biotechnologically-relevant bacterium, namely, Pseudomonas taiwanensis VLB120, were characterized by high performance liquid chromatography (HPLC)-high resolution mass spectrometry (HRMS). The same structural characterization scheme was checked before by analysis of Pseudomonas sp. putida KT2440 samples with known PVDs. A new sample preparation strategy based on solid-phase extraction was developed, requiring significantly reduced sample material as compared to existing methods...
June 19, 2017: Biometals: An International Journal on the Role of Metal Ions in Biology, Biochemistry, and Medicine
https://www.readbyqxmd.com/read/28631054/adaptation-of-tick-borne-encephalitis-virus-from-human-brain-to-different-cell-cultures-induces-multiple-genomic-substitutions
#6
Eugenia P Ponomareva, Vladimir A Ternovoi, Tamara P Mikryukova, Elena V Protopopova, Anastasia V Gladysheva, Alexander N Shvalov, Svetlana N Konovalova, Eugene V Chausov, Valery B Loktev
The C11-13 strain from the Siberian subtype of tick-borne encephalitis virus (TBEV) was isolated from human brain using pig embryo kidney (PEK), 293, and Neuro-2a cells. Analysis of the complete viral genome of the C11-13 variants during six passages in these cells revealed that the cell-adapted C11-13 variants had multiple amino acid substitutions as compared to TBEV from human brain. Seven out of eight amino acids substitutions in the high-replicating C11-13(PEK) variant mapped to non-structural proteins; 13 out of 14 substitutions in the well-replicating C11-13(293) variant, and all four substitutions in the low-replicating C11-13(Neuro-2a) variant were also localized in non-structural proteins, predominantly in the NS2a (2), NS3 (6) and NS5 (3) proteins...
June 19, 2017: Archives of Virology
https://www.readbyqxmd.com/read/28630187/cumulative-effect-of-an-antimicrobial-stewardship-and-rapid-diagnostic-testing-bundle-on-early-streamlining-of-antimicrobial-therapy-in-gram-negative-bloodstream-infections
#7
P B Bookstaver, E B Nimmich, T J Smith, J A Justo, J Kohn, K L Hammer, C Troficanto, H A Albrecht, M N Al-Hasan
OBJECTIVES: The use of rapid diagnostic tests (RDT) enhances antimicrobial stewardship programs (ASP) interventions in optimization of antimicrobial therapy. This quasi-experimental cohort study evaluates the combined impact of an ASP/RDT bundle on appropriateness of empirical antimicrobial therapy (EAT) and time to de-escalation of broad-spectrum agents (BSAA) in gram-negative bloodstream infections (GNBSI). METHODS: ASP/RDT bundle consisted of a system-wide GNBSI treatment guidelines, prospective stewardship monitoring, and sequential introduction of two RDTs, Matrix Assisted Laser Desorption Ionization Time-of-Flight (MALDI-TOF) and FilmArray® Blood Culture Identification (BCID) panel...
June 19, 2017: Antimicrobial Agents and Chemotherapy
https://www.readbyqxmd.com/read/28629734/immunohistochemical-and-genetic-exploration-of-incompatible-a-blood-group-antigen-expression-in-invasive-micropapillary-breast-carcinoma-a-case-report
#8
S Zouine, Z Orfi, K Kojok, S Benayad, Y Zaid, F Marnissi, N Habti
INTRODUCTION: Invasive Micropapillary Carcinoma (IMPC) of the breast is a relatively rare subtype of invasive ductal carcinoma and represents the most inherently aggressive form. Expression of incompatible blood group A antigen in cancer of type O patients has been reported in several types of cancer, however, the biosynthetic mechanism and the genetic basis remain unclear until today. The aim of the present case report study was to evaluate the expression of incompatible blood group A antigen and to identify the genetic basis of this expression in IMPC of the breast...
June 16, 2017: Current Research in Translational Medicine
https://www.readbyqxmd.com/read/28627122/a-biotinylated-peptide-bp21-as-a-novel-potent-anti-anaphylactic-agent-targeting-platelet-activating-factor
#9
Akira Sato, Keiichi Ebina
Platelet-activating factor (PAF) is an important mediator of anaphylaxis and is therefore an anti-anaphylactic drug target. We recently reported that synthetic N-terminally biotinylated peptides (BP4-BP29) inhibit PAF by directly interacting with PAF and its metabolite/precursor lyso-PAF. In this study, we investigated whether the biotinylated peptides can inhibit anaphylactic reactions in vivo. In mouse models of anaphylaxis, one of the peptides, BP21, markedly and dose-dependently inhibited hypothermia with a maximum dose-response within 30 min after administration, even at doses 20 times lesser than doses of the known PAF antagonist CV-3988...
June 19, 2017: Journal of Peptide Science: An Official Publication of the European Peptide Society
https://www.readbyqxmd.com/read/28626916/unexpected-functions-of-angiotensin-converting-enzyme-beyond-its-enzymatic-activity
#10
REVIEW
Jean Martinez
Angiotensin converting enzyme (ACE) is a well-known enzyme, largely studied for its action on hypertension, as it produces angiotensin II from angiotensin I. This paper describes two original behaviours of ACE. We showed that ACE could hydrolyse gastrin, a neuropeptide from the gastrointestinal tract, releasing the C-terminal amidated dipeptide H-Asp-Phe-NH2 . This dipeptide is believed to be involved in the gastrin-induced acid secretion in the stomach. This hypothetic mechanism of action of gastrin resulted in a strategy to rationally design gastrin receptor antagonists...
June 19, 2017: Journal of Peptide Science: An Official Publication of the European Peptide Society
https://www.readbyqxmd.com/read/28626832/fragment-binding-to-%C3%AE-secretase-1-without-catalytic-aspartate-interactions-identified-via-orthogonal-screening-approaches
#11
Frederik J R Rombouts, Richard Alexander, Erna Cleiren, Alex De Groot, Michel Carpentier, Joyce Dijkmans, Katleen Fierens, Stefan Masure, Diederik Moechars, Martina Palomino-Schätzlein, Antonio Pineda-Lucena, Andrés A Trabanco, Daan Van Glabbeek, Ann Vos, Gary Tresadern
An approach to identify β-secretase 1 (BACE1) fragment binders that do not interact with the catalytic aspartate dyad is presented. A ThermoFluor (thermal shift) and a fluorescence resonance energy transfer enzymatic screen on the soluble domain of BACE1, together with a surface plasmon resonance (SPR) screen on the soluble domain of BACE1 and a mutant of one catalytic Asp (D32N), were run in parallel. Fragments that were active in at least two of these assays were further confirmed using one-dimensional NMR (WaterLOGSY) and SPR binding competition studies with peptidic inhibitor OM99-2...
February 28, 2017: ACS Omega
https://www.readbyqxmd.com/read/28626014/bace1-cleavage-site-selection-critical-for-amyloidogenesis-and-alzheimer-s-pathogenesis
#12
Shuting Zhang, Zhe Wang, Fang Cai, Mingming Zhang, Yili Wu, Jing Zhang, Weihong Song
Mutations in amyloid β precursor protein (APP) gene alter APP processing, either causing familial Alzheimer's Disease (AD) or protecting against dementia. Under normal conditions beta-site APP cleaving enzyme 1 (BACE1) cleaves APP at minor Asp(1) site to generate C99 for amyloid β protein (Aβ) production, and predominantly at major Glu(11) site to generate C89, resulting in truncated Aβ production. We discovered that A673V mutation, the only recessive AD-associated APP mutation, shifted the preferential β-cleavage site of BACE1 in APP from the Glu(11) site to the Asp(1) site both in male and female transgenic mice in vivo and in cell lines and primary neuronal culture derived from timed pregnant rats in vitro, resulting in a much higher C99 level and C99/C89 ratio...
June 16, 2017: Journal of Neuroscience: the Official Journal of the Society for Neuroscience
https://www.readbyqxmd.com/read/28624276/cow-and-environmental-factors-associated-with-protein-fractions-and-free-amino-acids-predicted-using-mid-infrared-spectroscopy-in-bovine-milk
#13
A McDermott, M De Marchi, D P Berry, G Visentin, M A Fenelon, N Lopez-Villalobos, S McParland
The objective of the present study was to identify the factors associated with both the protein composition and free amino acid (FAA) composition of bovine milk predicted using mid-infrared spectroscopy. Milk samples were available from 7 research herds and 69 commercial herds. The spectral data from the research herds comprised 94,286 separate morning and evening milk samples; the spectral data from the commercial herds comprised 40,260 milk samples representing a composite sample of both the morning and evening milkings...
June 14, 2017: Journal of Dairy Science
https://www.readbyqxmd.com/read/28621166/l-asparaginase-for-newly-diagnosed-extra-nodal-nk-t-cell-lymphoma-systematic-review-and-meta-analysis
#14
Vadim S Pokrovsky, Denis Vinnikov
OBJECTIVES: The aim of this review was to compare the efficacy of asparaginase (ASP)-containing vs ASP-absent regimens in the first-line treatment of ENKTL patients. METHODS: The PRISMA protocol was used to search PubMed and Embase for both controlled and uncontrolled studies of ASP or alternative chemotherapy (CT) for newly diagnosed ENKTL, published in English by March 2017. The regimens were compared to calculate relative risk (RR) with 95% confidence interval (CI) of the overall response rate (ORR), complete response (CR) or partial response (PR)...
June 21, 2017: Expert Review of Anticancer Therapy
https://www.readbyqxmd.com/read/28620990/association-patterns-of-endothelial-nitric-oxide-synthase-gene-nos3-variant-glu298asp-with-blood-pressure-and-serum-lipid-levels-in-subjects-with-coronary-artery-disease-from-pakistan
#15
Saleem Ullah Shahid, Abdul Rehman
Nitric oxide is an important antiatherosclerotic agent. The main determinant of nitric oxide levels is enzyme nitric oxide synthase encoded by the NOS3 gene, the common variants in this gene may be responsible for variations in plasma enzyme levels. The association of NOS3 variants with coronary artery disease (CAD) varies in different ethnicities. The current study aimed to determine the association of NOS3 Glu298Asp (rs1799983) with CAD and blood lipid levels in Pakistani subjects. Six hundred thirty-six samples (412 cases, 224 controls) were genotyped by TaqMan allelic discrimination assay and serum total cholesterol, and High Density Lipoprotein cholesterol (HDL-C)/Low Density Lipoprotein cholesterol (LDL-C) and triglycerides were measured...
July 2017: Annals of Human Genetics
https://www.readbyqxmd.com/read/28620050/engineering-the-fragment-crystallizable-fc-region-of-human-igg1-multimers-and-monomers-to-fine-tune-interactions-with-sialic-acid-dependent-receptors
#16
Patricia A Blundell, Ngoc Phuong Lan Le, Joel Allen, Yasunori Watanabe, Richard J Pleass
Multimeric fragment crystallizable (Fc) regions and Fc-fusion proteins are actively being explored as biomimetic replacements for intravenous immunoglobulin (IVIG) therapy, which is deployed to manage many diseases and conditions but is expensive and not always efficient. The Fc region of human IgG1 (IgG1-Fc) can be engineered into multimeric structures (hexa-Fcs) that bind their cognate receptors with high avidity. The critical influence of the unique N-linked glycan attached at Asn-297 on the structure and function of IgG1-Fc is well documented; however, whether the N-linked glycan has a similarly critical role in multimeric, avidly binding Fcs is unknown...
June 15, 2017: Journal of Biological Chemistry
https://www.readbyqxmd.com/read/28619651/structure-and-electrochemistry-of-proteins-harboring-iron-sulfur-clusters-of-different-nuclearities-part-i-4fe-4s-2fe-2s-iron-sulfur-proteins
#17
REVIEW
Piero Zanello
In a recent series of review papers we have updated structure/electrochemistry of metalloproteins harboring single types of iron-sulfur clusters, namely {Fe(Cys)4}, {[Fe2S2](Cys)4}, {[Fe2S2](Cys)3(X)} (X = Asp, Arg, His), {[Fe2S2](Cys)2(His)2}, {[Fe3S4](Cys)3}, {[Fe4S4](Cys)4} and {[Fe4S4](S(γ)Cys)3(nonthiolate ligand)} cores, and their synthetic analogs. We now face with iron-sulfur proteins harboring iron-sulfur centres of different nuclearities. In this picture we start with proteins containing [4Fe-4S]+[2Fe-2S] clusters...
June 12, 2017: Journal of Structural Biology
https://www.readbyqxmd.com/read/28619110/effect-of-aspartic-acid-and-glutamate-on-metabolism-and-acid-stress-resistance-of-acetobacter-pasteurianus
#18
Haisong Yin, Renkuan Zhang, Menglei Xia, Xiaolei Bai, Jun Mou, Yu Zheng, Min Wang
BACKGROUND: Acetic acid bacteria (AAB) are widely applied in food, bioengineering and medicine fields. However, the acid stress at low pH conditions limits acetic acid fermentation efficiency and high concentration of vinegar production with AAB. Therefore, how to enhance resistance ability of the AAB remains as the major challenge. Amino acids play an important role in cell growth and cell survival under severe environment. However, until now the effects of amino acids on acetic fermentation and acid stress resistance of AAB have not been fully studied...
June 15, 2017: Microbial Cell Factories
https://www.readbyqxmd.com/read/28619085/validity-of-a-family-centered-approach-for-assessing-infants-social-emotional-wellbeing-and-their-developmental-context-a-prospective-cohort-study
#19
Margriet Hielkema, Andrea F De Winter, Sijmen A Reijneveld
BACKGROUND: Family-centered care seems promising in preventive pediatrics, but evidence is lacking as to whether this type of care is also valid as a means to identify risks to infants' social-emotional development. We aimed to examine the validity of such a family-centered approach. METHODS: We conducted a prospective cohort study. During routine well-child visits (2-15 months), Preventive Child Healthcare (PCH) professionals used a family-centered approach, assessing domains as parents' competence, role of the partner, social support, barriers within the care-giving context, and child's wellbeing for 2976 children as protective, indistinct or a risk...
June 15, 2017: BMC Pediatrics
https://www.readbyqxmd.com/read/28617740/academic-productivity-knowledge-and-education-in-plastic-surgery-the-benefit-of-the-clinical-research-fellow
#20
Martin J Carney, Jason M Weissler, Peter F Koltz, John P Fischer, Liza C Wu, Joseph M Serletti
Academic research productivity is limited by strenuous resident and faculty schedules, yet is imperative to the growth and success of our discipline. We report institutional experience with our clinical research fellowship model, providing two positions per year.A critical analysis of research productivity was performed for all trainees, faculty, and research fellows from 2000-2015. All articles in-print were individually collected to identify academic appointment at time of publication for the authors. Academic productivity was determined by number of peer-reviewed publications, podium presentations, and h-index...
June 14, 2017: Plastic and Reconstructive Surgery
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