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https://www.readbyqxmd.com/read/29244730/isolation-and-characterization-of-ftsz-genes-in-cassava
#1
Meng-Ting Geng, Yi Min, Yuan Yao, Xia Chen, Jie Fan, Shuai Yuan, Lei Wang, Chong Sun, Fan Zhang, Lu Shang, Yun-Lin Wang, Rui-Mei Li, Shao-Ping Fu, Rui-Jun Duan, Jiao Liu, Xin-Wen Hu, Jian-Chun Guo
The filamenting temperature-sensitive Z proteins (FtsZs) play an important role in plastid division. In this study, three FtsZ genes were isolated from the cassava genome, and named MeFtsZ1, MeFtsZ2-1, and MeFtsZ2-2, respectively. Based on phylogeny, the MeFtsZs were classified into two groups (FtsZ1 and FtsZ2). MeFtsZ1 with a putative signal peptide at N-terminal, has six exons, and is classed to FtsZ1 clade. MeFtsZ2-1 and MeFtsZ2-2 without a putative signal peptide, have seven exons, and are classed to FtsZ2 clade...
December 15, 2017: Genes
https://www.readbyqxmd.com/read/29244625/the-role-of-oxytocin-and-vasopressin-in-attachment
#2
C Sue Carter
Selective relationships and attachments are central to human health and well-being, both in current societies and during the course of evolution. The presence or absence of social bonds has consequences across the lifespan. The neurobiology of attachment is grounded in neuroendocrine substrates that are shared with reproduction and survival. Experimental studies of species, such as sheep or prairie voles, capable of showing selective social behaviors toward offspring or partners, have provided empirical evidence for the role of oxytocin and vasopressin in the formation of selective attachments...
2017: Psychodynamic Psychiatry
https://www.readbyqxmd.com/read/29244531/effects-of-natural-peptides-from-food-proteins-on-angiotensin-converting-enzyme-activity-and-hypertension
#3
Melanie Martin, Andreas Deussen
Cardiovascular diseases are the leading cause of death. The underlying pathophysiology is largely contributed by an overactivation of the renin-angiotensin-aldosterone-system (RAAS). Herein, angiotensin II (AngII) is a key mediator not only in blood pressure control and vascular tone regulation, but also involved in inflammation, endothelial dysfunction, atherosclerosis, hypertension and congestive heart failure. Since more than three decades suppression of AngII generation by inhibition of the angiotensin-converting enzyme (ACE) or blockade of the AngII-receptor has shown clinical benefit by reducing hypertension, atherosclerosis and other inflammation-associated cardiovascular diseases...
December 15, 2017: Critical Reviews in Food Science and Nutrition
https://www.readbyqxmd.com/read/29244524/inhaled-diesel-exhaust-decreases-antimicrobial-peptides-alpha-defensin-and-s100a7-in-human-bronchial-secretion
#4
Hadeesha Piyadasa, Mahadevappa Hemshekhar, Christopher Carlsten, Neeloffer Mookherjee
No abstract text is available yet for this article.
December 15, 2017: American Journal of Respiratory and Critical Care Medicine
https://www.readbyqxmd.com/read/29244519/synthetic-marine-sponge-collagen-by-late-stage-dihydroxylation
#5
Christoph Priem, Armin Geyer
Based on the observation that an increased substrate size is paralleled by an enhanced diastereoselectivity, a late-stage dihydroxylation protocol toward the 21mer CMP (collagen model peptide) Ac-(Pro-Hyp-Gly)3-Pro-Dyp-Gly-(Pro-Hyp-Gly)3-NH2 is presented. C3 and C4 hydroxylation have a converse effect on the triple-helical stability of collagen. Their combined influence on the melting temperature was studied by NMR spectroscopy.
December 15, 2017: Organic Letters
https://www.readbyqxmd.com/read/29244487/synergistic-inhibitory-effect-of-gqds-tramiprosate-covalent-binding-on-amyloid-aggregation
#6
Yibiao Liu, Li-Ping Xu, Qiang Wang, Baocheng Yang, Xueji Zhang
Inhibiting the amyloid aggregation is considered to be an effective strategy to explore possible treatment of amyloid-related diseases including Alzheimer's disease, Parkinson's disease, and type II diabetes. Herein, a new high-efficiency and low-cytotoxicity Aβ aggregation inhibitors, GQD-T was designed through the combination of two Aβ inhibitors graphene quantum dots (GQDs) and tramiprosate. GQD-T showed the capability of efficiently inhibiting the aggregation of Aβ peptides and rescuing Aβ-induced cytotoxicity due to the synergistic effect of the GQDs and tramiprosate...
December 15, 2017: ACS Chemical Neuroscience
https://www.readbyqxmd.com/read/29244483/biomembrane-permeabilization-statistics-of-individual-leakage-events-harmonize-the-interpretation-of-vesicle-leakage
#7
Stefan Braun, Šárka Pokorná, Radek Šachl, Martin Hof, Heiko Heerklotz, Maria Hoernke
The mode of action of membrane-active molecules such as antimicrobial, anticancer, cell penetrating, and fusion peptides and their synthetic mimics, transfection agents and drug permeation enhancers, biological signaling molecules (e.g., quorum sensing), involves either the general or local destabilization of the target membrane or the formation of defined, rather stable pores. Some effects aim at killing the cell, others need to be limited in space and time to avoid serious damage. Biological tests reveal translocation of compounds and cell death but do not provide a detailed, mechanistic, and quantitative understanding of the modes of action and their molecular basis...
December 15, 2017: ACS Nano
https://www.readbyqxmd.com/read/29244193/comparative-peptidomic-profile-between-human-hypertrophic-scar-tissue-and-matched-normal-skin-for-identification-of-endogenous-peptides-involved-in-scar-pathology
#8
Jingyun Li, Ling Chen, Qian Li, Jing Cao, Yanli Gao, Jun Li
Endogenous peptides recently attract increasing attention for their participation in various biological processes. Their roles in the pathogenesis of human hypertrophic scar remains poorly understood. In this study, we used liquid chromatography-tandem mass spectrometry to construct a comparative peptidomic profiling between human hypertrophic scar tissue and matched normal skin. A total of 179 peptides were significantly differentially expressed in human hypertrophic scar tissue, with 95 upregulated and 84 downregulated peptides between hypertrophic scar tissue and matched normal skin...
December 15, 2017: Journal of Cellular Physiology
https://www.readbyqxmd.com/read/29244074/the-heart-regulates-the-endocrine-response-to-heart-failure-cardiac-contribution-to-circulating-neprilysin
#9
Mattia Arrigo, Nicolas Vodovar, Hélène Nougué, Malha Sadoune, Chris J Pemberton, Pamela Ballan, Pierre-Olivier Ludes, Nicolas Gendron, Alain Carpentier, Bernard Cholley, Philippe Bizouarn, Alain Cohen-Solal, Jagmeet P Singh, Jackie Szymonifka, Christian Latremouille, Jane-Lise Samuel, Jean-Marie Launay, Julien Pottecher, A Mark Richards, Quynh A Truong, David M Smadja, Alexandre Mebazaa
Aims: Heart failure (HF) is accompanied by major neuroendocrine changes including the activation of the natriuretic peptide (NP) pathway. Using the unique model of patients undergoing implantation of the CARMAT total artificial heart and investigating regional differences in soluble neprilysin (sNEP) in patients with reduced or preserved systolic function, we studied the regulation of the NP pathway in HF. Methods and results: Venous blood samples from two patients undergoing replacement of the failing ventricles with a total artificial heart were collected before implantation and weekly thereafter until post-operative week 6...
December 13, 2017: European Heart Journal
https://www.readbyqxmd.com/read/29243932/role-of-aromatic-crosslinks-in-structure-and-dynamics-of-model-three-stranded-%C3%AE-sheet-peptides
#10
David Scheerer, Heng Chi, Dan McElheny, Ayesha Samer, Timothy A Keiderling, Karin Hauser
A series of closely related peptide sequences that form triple-strand structures were designed with a variation of cross-strand aromatic interactions and spectroscopically studied as models for β-sheet formation and stabilities. Structures of the three-strand models were determined with NMR methods and temperature-dependent equilibrium studies carried out using CD and FTIR spectroscopies. Our equilibrium data show that the presence of a direct cross-strand aromatic contact in an otherwise folded peptide does not automatically result in an increased thermal stability, and can even distort the structure...
December 15, 2017: Journal of Physical Chemistry. A
https://www.readbyqxmd.com/read/29243824/apoplastp-prediction-of-effectors-and-plant-proteins-in-the-apoplast-using-machine-learning
#11
Jana Sperschneider, Peter N Dodds, Karam B Singh, Jennifer M Taylor
The plant apoplast is integral to intercellular signalling, transport and plant-pathogen interactions. Plant pathogens deliver effectors both into the apoplast and inside host cells, but no computational method currently exists to discriminate between these localizations. We present ApoplastP, the first method for predicting whether an effector or plant protein localizes to the apoplast. ApoplastP uncovers features of apoplastic localization common to both effectors and plant proteins, namely depletion in glutamic acid, acidic amino acids and charged amino acids and enrichment in small amino acids...
December 15, 2017: New Phytologist
https://www.readbyqxmd.com/read/29243585/review-the-role-of-radiolabeled-dota-conjugated-peptides-for-imaging-and-treatment-of-childhood-neuroblastoma
#12
Natasha Alexander, Reza Vali, Hojjat Ahmadzadehfar, Amer Shammas, Sylvain Baruchel
Childhood neuroblastoma is a heterogenous disease with varied clinical presentation and biology requiring different approaches to investigation and management. Meta-iodobenzylguanidine (MIBG) is an essential component of metastatic staging for neuroblastoma and has been used as a treatment strategy for relapsed and refractory neuroblastoma. However,10% of children with neuroblastoma will have 123I-MIBG non-avid imaging and up to 60% with relapsed and refractory neuroblastoma will require further treatment with 131I-MIBG, alternative radioisotopes have been investigated for imaging and treatment...
December 14, 2017: Current Radiopharmaceuticals
https://www.readbyqxmd.com/read/29243092/-multiple-partial-recognitions-in-dynamic-equilibrium-in-the-binding-sites-of-proteins-form-the-molecular-basis-of-promiscuous-recognition-of-structurally-diverse-ligands
#13
REVIEW
Daisuke Kohda
Promiscuous recognition of ligands by proteins is as important as strict recognition in numerous biological processes. In living cells, many short, linear amino acid motifs function as targeting signals in proteins to specify the final destination of the protein transport. In general, the target signal is defined by a consensus sequence containing wild-characters, and hence represented by diverse amino acid sequences. The classical lock-and-key or induced-fit/conformational selection mechanism may not cover all aspects of the promiscuous recognition...
December 14, 2017: Biophysical Reviews
https://www.readbyqxmd.com/read/29242993/promotion-of-neuronal-regeneration-by-using-self-polymerized-dendritic-polypeptide-scaffold-for-spinal-cord-tissue-engineering
#14
Jun Ming Wan, Liang le Liu, Jian Fang Zhang, Jian Wei Lu, Qi Li
Tissue engineering technology is applicable for study of nerve regeneration after spinal cord injury. Many natural and artificial scaffold are not applicable because of poor mechanical properties and cell compatibility. Polypeptides with fine three-dimensional structure and cell compatibility and are widely used in tissue engineering research. The purpose of this study was to verify the neuronal differentiation of neural stem cells by using self-polymerize dendritic polypeptide for spinal cord tissue engineering...
December 14, 2017: Journal of Materials Science. Materials in Medicine
https://www.readbyqxmd.com/read/29242901/designed-host-defense-peptides-for-the-treatment-of-bacterial-keratitis
#15
L Edward Clemens, Jesse Jaynes, Edward Lim, Satya S Kolar, Rose Y Reins, Hasna Baidouri, Samuel Hanlon, Alison M McDermott, Kathryn W Woodburn
Purpose: To limit corneal damage and potential loss of vision, bacterial keratitis must be treated aggressively. Innovation in antimicrobials is required due to the need for empirical treatment and the rapid emergence of bacterial resistance. Designed host defense peptides (dHDPs) are synthetic analogues of naturally occurring HDPs, which provide defense against invading pathogens. This study investigates the use of novel dHDPs for the treatment of bacterial keratitis. Methods: The minimum inhibitory concentrations (MICs) were determined for dHDPs on both Gram-positive and -negative bacteria...
December 1, 2017: Investigative Ophthalmology & Visual Science
https://www.readbyqxmd.com/read/29242868/synthesis-of-the-natural-product-descurainolide-and-cyclic-peptides-from-lignin-derived-aromatics
#16
O Stephen Ojo, Brunello Nardone, Stefania F Musolino, Andrew R Neal, Liam Wilson, Tomas Lebl, Alexandra M Z Slawin, David B Cordes, James E Taylor, James H Naismith, Andrew D Smith, Nicholas J Westwood
Alternative sources of potential feedstock chemicals are of increasing importance as the availability of oil decreases. The biopolymer lignin is viewed as a source of useful mono-aromatic compounds as exemplified by the industrial scale production of vanillin from this biomass. Alternative lignin-derived aromatics are available in pure form but to date examples of the use of these types of compounds are rare. Here we address this issue by reporting the conversion of an aromatic keto-alcohol to the anti- and syn-isomers of Descurainolide A...
December 15, 2017: Organic & Biomolecular Chemistry
https://www.readbyqxmd.com/read/29242830/interaction-of-antibiotics-with-innate-host-defense-factors-against-salmonella-enterica-serotype-newport
#17
George Sakoulas, Monika Kumaraswamy, Armin Kousha, Victor Nizet
This study examines the pharmacodynamics of antimicrobials that are used to treat Salmonella with each other and with key components of the innate immune system. Antimicrobial synergy was assessed using time-kill and checkerboard assays. Antimicrobial interactions with innate immunity were studied by employing cathelicidin LL-37, whole-blood, and neutrophil killing assays. Ceftriaxone and ciprofloxacin were found to be synergistic in vitro against Salmonella enterica serotype Newport. Ceftriaxone, ciprofloxacin, and azithromycin each demonstrated synergy with the human cathelicidin defense peptide LL-37 in killing Salmonella...
November 2017: MSphere
https://www.readbyqxmd.com/read/29242824/modular-peptide-amphiphile-micelles-improving-an-antibody-mediated-immune-response-to-group-a-streptococcus
#18
John C Barrett, Bret D Ulery, Amanda Trent, Simon Liang, Natalie A David, Matthew V Tirrell
Inducing a strong and specific immune response is the hallmark of a successful vaccine. Nanoparticles have emerged as promising vaccine delivery devices to discover and elicit immune responses. Fine-tuning a nanoparticle vaccine to create an immune response with specific antibody and other cellular responses is influenced by many factors such as shape, size, and composition. Peptide amphiphile micelles are a unique biomaterials platform that can function as a modular vaccine delivery system, enabling control over many of these important factors and delivering payloads more efficiently to draining lymph nodes...
2017: ACS Biomaterials Science & Engineering
https://www.readbyqxmd.com/read/29242808/small-peptide-substrates-and-high-resolution-peptide-gels-for-the-analysis-of-site-specific-protein-phosphorylation-and-dephosphorylation
#19
Laura Johnson Battle, Timothy C Chambers
Protein phosphorylation and dephosphorylation reactions play key regulatory roles in many fundamental cellular processes. Due to the large number of kinases and phosphatases in the genome, the identification of the specific enzymes responsible for a given site in a given protein is immensely challenging. However, because protein kinases and phosphatases recognize local specificity determinants within proteins, it is possible to use small peptides to study the characteristics of site-specific phosphorylation...
2017: Journal of Biological Methods
https://www.readbyqxmd.com/read/29242618/a-simple-platform-for-the-rapid-development-of-antimicrobials
#20
Stephen Albert Johnston, Valeriy Domenyuk, Nidhi Gupta, Milene Tavares Batista, John C Lainson, Zhan-Gong Zhao, Joel F Lusk, Andrey Loskutov, Zbigniew Cichacz, Phillip Stafford, Joseph Barten Legutki, Chris W Diehnelt
Recent infectious outbreaks highlight the need for platform technologies that can be quickly deployed to develop therapeutics needed to contain the outbreak. We present a simple concept for rapid development of new antimicrobials. The goal was to produce in as little as one week thousands of doses of an intervention for a new pathogen. We tested the feasibility of a system based on antimicrobial synbodies. The system involves creating an array of 100 peptides that have been selected for broad capability to bind and/or kill viruses and bacteria...
December 14, 2017: Scientific Reports
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