keyword
MENU ▼
Read by QxMD icon Read
search

biomolecular

keyword
https://www.readbyqxmd.com/read/27909974/native-mass-spectrometry-what-is-in-the-name
#1
Aneika C Leney, Albert J R Heck
Electrospray ionization mass spectrometry (ESI-MS) is nowadays one of the cornerstones of biomolecular mass spectrometry and proteomics. Advances in sample preparation and mass analyzers have enabled researchers to extract much more information from biological samples than just the molecular weight. In particular, relevant for structural biology, noncovalent protein-protein and protein-ligand complexes can now also be analyzed by MS. For these types of analyses, assemblies need to be retained in their native quaternary state in the gas phase...
December 1, 2016: Journal of the American Society for Mass Spectrometry
https://www.readbyqxmd.com/read/27905608/drop-coating-deposition-of-a-liposome-suspension-on-surfaces-with-different-wettabilities-coffee-ring-formation-and-suspension-preconcentration
#2
Eva Kočišová, Martin Petr, Hana Šípová, Ondřej Kylián, Marek Procházka
Evaporation of a drop of biomolecular solution on a solid surface typically creates a ring-shaped drying pattern, formed by the so-called "coffee ring" effect. The size and shape of the "coffee ring" pattern is strongly dependent on the properties of the surface as well as on the deposited molecular solution or suspension. In this paper, we tested six types of surfaces differing in their physico-chemical surface characteristics (contact angles, wettability and roughness) as well as in the presence or absence of a base metal layer...
December 1, 2016: Physical Chemistry Chemical Physics: PCCP
https://www.readbyqxmd.com/read/27905089/novel-paradigm-for-immunotherapy-of-ovarian-cancer-by-engaging-prophylactic-immunity-against-hepatitis-b-virus
#3
Marek Malecki, Emily Putzer, Caroline Quach, Chaitanya Dodivenaka, Xenia Tombokan
BACKGROUND: Only eight women out of one hundred diagnosed with ovarian epithelial cancers, which progressed to the clinical stage IV, survive 10 years. First line therapies: surgery, chemotherapy, and radiation therapy inflict very serious iatrogenic consequences. Passive immunotherapy of ovarian cancers offers only low efficacy. Prophylactic and therapeutic vaccines for ovarian cancers are not available. Interestingly, prophylactic vaccines for Hepatitis B Viruses (HBV) are very effective...
December 2016: Clinical and Translational Medicine
https://www.readbyqxmd.com/read/27901305/structural-basis-for-the-klentaq-dna-polymerase-catalyzed-incorporation-of-alkene-versus-alkyne-modified-nucleotides
#4
Andreas Marx, Audrey Hottin, Karin Betz, Kay Diederichs
Efficient incorporation of modified nucleotides by DNA polymerases is essential for many cutting-edge biomolecular technologies. The present study compares the acceptance of either alkene- or alkyne-modified nucleotides by KlenTaq DNA polymerase and provides structural insights into how 7-deaza-adenosine and thymidine with attached alkene-modifications are incorporated into the growing DNA strand. Thereby, we identified modified nucleotides, which prove to be superior substrates for KlenTaq DNA polymerase compared to their natural analogues...
November 30, 2016: Chemistry: a European Journal
https://www.readbyqxmd.com/read/27901142/an-optimized-charge-penetration-model-for-use-with-the-amoeba-force-field
#5
Joshua A Rackers, Qiantao Wang, Chengwen Liu, Jean-Philip Piquemal, Pengyu Ren, Jay W Ponder
The principal challenge of using classical physics to model biomolecular interactions is capturing the nature of short-range interactions that drive biological processes from nucleic acid base stacking to protein-ligand binding. In particular most classical force fields suffer from an error in their electrostatic models that arises from an ability to account for the overlap between charge distributions occurring when molecules get close to each other, known as charge penetration. In this work we present a simple, physically motivated model for including charge penetration in the AMOEBA (Atomic Multipole Optimized Energetics for Biomolecular Applications) force field...
November 30, 2016: Physical Chemistry Chemical Physics: PCCP
https://www.readbyqxmd.com/read/27900435/enzyme-based-logic-gates-and-circuits-analytical-applications-and-interfacing-with-electronics
#6
REVIEW
Evgeny Katz, Arshak Poghossian, Michael J Schöning
The paper is an overview of enzyme-based logic gates and their short circuits, with specific examples of Boolean AND and OR gates, and concatenated logic gates composed of multi-step enzyme-biocatalyzed reactions. Noise formation in the biocatalytic reactions and its decrease by adding a "filter" system, converting convex to sigmoid response function, are discussed. Despite the fact that the enzyme-based logic gates are primarily considered as components of future biomolecular computing systems, their biosensing applications are promising for immediate practical use...
November 29, 2016: Analytical and Bioanalytical Chemistry
https://www.readbyqxmd.com/read/27900165/evaluation-of-cardiovascular-risk-lowering-health-benefits-accruing-from-laboratory-based-community-based-and-exercise-referral-exercise-programmes
#7
R Webb, J E S Thompson, J-S Ruffino, N A Davies, L Watkeys, S Hooper, P M Jones, G Walters, D Clayton, A W Thomas, K Morris, D H Llewellyn, M Ward, J Wyatt-Williams, B J McDonnell
BACKGROUND: To evaluate the ability of community-based exercise programmes to facilitate public participation in exercise and hence improved cardiovascular health, we assessed the respective impacts of: a continuously monitored exercise programme based within our university (study 1); a Valleys Regional Park-facilitated community-based outdoor exercise programme (study 2); a Wales National Exercise Referral Scheme-delivered exercise-referral programme (study 3). METHODS: Biomolecular (monocytic PPARγ target gene expression), vascular haemodynamic (central/peripheral blood pressure, arterial stiffness), clinical (insulin sensitivity, blood lipids) and anthropometric (body mass index, waist circumference, heart rate) parameters were investigated using RT-PCR, applanation tonometry, chemical analysis and standard anthropometric techniques...
2016: BMJ Open Sport & Exercise Medicine
https://www.readbyqxmd.com/read/27899674/cdd-sparcle-functional-classification-of-proteins-via-subfamily-domain-architectures
#8
Aron Marchler-Bauer, Yu Bo, Lianyi Han, Jane He, Christopher J Lanczycki, Shennan Lu, Farideh Chitsaz, Myra K Derbyshire, Renata C Geer, Noreen R Gonzales, Marc Gwadz, David I Hurwitz, Fu Lu, Gabriele H Marchler, James S Song, Narmada Thanki, Zhouxi Wang, Roxanne A Yamashita, Dachuan Zhang, Chanjuan Zheng, Lewis Y Geer, Stephen H Bryant
NCBI's Conserved Domain Database (CDD) aims at annotating biomolecular sequences with the location of evolutionarily conserved protein domain footprints, and functional sites inferred from such footprints. An archive of pre-computed domain annotation is maintained for proteins tracked by NCBI's Entrez database, and live search services are offered as well. CDD curation staff supplements a comprehensive collection of protein domain and protein family models, which have been imported from external providers, with representations of selected domain families that are curated in-house and organized into hierarchical classifications of functionally distinct families and sub-families...
November 29, 2016: Nucleic Acids Research
https://www.readbyqxmd.com/read/27898020/multivalent-aptamers-versatile-tools-for-diagnostic-and-therapeutic-applications
#9
REVIEW
Mariya Vorobyeva, Pavel Vorobjev, Alya Venyaminova
Nucleic acid aptamers generated through an in vitro selection are currently extensively applied as very valuable biomolecular tools thanks to their prominent advantages. Diversity of spatial structures, ease of production through chemical synthesis and a large variety of chemical modifications make aptamers convenient building blocks for the generation of multifunctional constructs. An opportunity to combine different aptamer functionalities with other molecules of interest such as reporter groups, nanoparticles, chemotherapeutic agents, siRNA or antisense oligonucleotides provides a widest range of applications of multivalent aptamers...
November 25, 2016: Molecules: a Journal of Synthetic Chemistry and Natural Product Chemistry
https://www.readbyqxmd.com/read/27895047/innovative-approaches-to-establish-and-characterize-primary-cultures-an-ex-vivo-3d-system-and-the-zebrafish-model
#10
Chiara Liverani, Federico La Manna, Arwin Groenewoud, Laura Mercatali, Gabri Van Der Pluijm, Federica Pieri, Davide Cavaliere, Alessandro De Vita, Chiara Spadazzi, Giacomo Miserocchi, Alberto Bongiovanni, Federica Recine, Nada Riva, Dino Amadori, Ennio Tasciotti, Ewa Snaar-Jagalska, Toni Ibrahim
Patient-derived specimens are an invaluable resource to investigate tumor biology. However, in vivo studies on primary cultures are often limited by the small amount of material available, while conventional in vitro systems might alter the features and behavior that characterize cancer cells. We present our data obtained on primary dedifferentiated liposarcoma cells cultured in a 3D scaffold-based system and injected into a zebrafish model. Primary cells were characterized in vitro for their morphological features, sensitivity to drugs and biomarker expression, and in vivo for their engraftment and invasiveness abilities...
November 28, 2016: Biology Open
https://www.readbyqxmd.com/read/27893437/silicon-nanowire-heterostructures-for-advanced-energy-and-environmental-applications-a-review
#11
Ramesh Ghosh, P K Giri
Semiconductor nanowires (NWs), in particular Si NWs, have attracted much attention in the last decade for their unique electronic properties and potential applications in several emerging areas. With the introduction of heterostructures (HSs) on NWs, new functionalities are obtained and the device performance is improved significantly in many cases. Due to the easy fabrication techniques, excellent optoelectronic properties and compatibility of forming HSs with different inorganic/organic materials, Si NW HSs have been utilized in various configurations and device architectures...
November 28, 2016: Nanotechnology
https://www.readbyqxmd.com/read/27891522/biomolecular-network-based-synergistic-drug-combination-discovery
#12
REVIEW
Xiangyi Li, Guangrong Qin, Qingmin Yang, Lanming Chen, Lu Xie
Drug combination is a powerful and promising approach for complex disease therapy such as cancer and cardiovascular disease. However, the number of synergistic drug combinations approved by the Food and Drug Administration is very small. To bridge the gap between urgent need and low yield, researchers have constructed various models to identify synergistic drug combinations. Among these models, biomolecular network-based model is outstanding because of its ability to reflect and illustrate the relationships among drugs, disease-related genes, therapeutic targets, and disease-specific signaling pathways as a system...
2016: BioMed Research International
https://www.readbyqxmd.com/read/27889154/prevalence-and-quantification-of-thermophilic-campylobacter-spp-in-italian-retail-poultry-meat-analysis-of-influencing-factors
#13
Simone Stella, Gabriella Soncini, Graziella Ziino, Antonio Panebianco, Francesca Pedonese, Roberta Nuvoloni, Elisabetta Di Giannatale, Giampaolo Colavita, Leonardo Alberghini, Valerio Giaccone
Retail poultry meat is a crucial vehicle for consumers' exposure to Campylobacters, but no official controls are currently applied in Italy. The aim of this study was the evaluation of Campylobacter contamination of a wide range of poultry meats marketed in Italy. N. 472 chicken and turkey meat samples (sectioned meats, offal, meat preparations and products) were taken from slaughterhouses, deboning plants and different retailers and submitted to detection/enumeration of Campylobacter spp. The isolates were identified by phenotypic and biomolecular techniques...
April 2017: Food Microbiology
https://www.readbyqxmd.com/read/27888839/detection-of-intermolecular-noe-interactions-in-large-protein-complexes
#14
REVIEW
Jacob Anglister, Gautam Srivastava, Fred Naider
Intermolecular NOE interactions are invaluable for structure determination of biomolecular complexes by NMR and they represent the "gold-standard" amongst NMR measurements for characterizing interfaces. These NOEs constitute only a small fraction of the observed NOEs in a complex and are usually weaker than many of the intramolecular NOEs. A number of methods have been developed to remove the intramolecular NOEs that interfere with the identification of intermolecular NOEs. NMR experiments used to observe intermolecular NOE interactions in large protein complexes must cope with the short T2 relaxation time of the protons and heteronuclei in these complexes because they result in severe losses in sensitivity...
November 2016: Progress in Nuclear Magnetic Resonance Spectroscopy
https://www.readbyqxmd.com/read/27888606/discovery-of-metabolic-resistance-to-neonicotinoids-in-green-peach-aphids-myzus-persicae-in-australia
#15
Siobhan C de Little, Owain Edwards, Anthony R van Rooyen, Andrew Weeks, Paul A Umina
BACKGROUND: Myzus persicae is a serious pest that attacks a broad range of agricultural crops. This species has developed chemical resistance to many insecticides globally and within Australia resistance to multiple chemical groups has been identified. Resistance to neonicotinoid insecticides has been discovered in several countries, but has not previously been confirmed in Australia. We use biomolecular assays and bioassays on field-collected populations to investigate neonicotinoid resistance in M...
November 26, 2016: Pest Management Science
https://www.readbyqxmd.com/read/27888307/monitoring-doxorubicin-cellular-uptake-and-trafficking-using-in-vitro-raman-microspectroscopy-short-and-long-time-exposure-effects-on-lung-cancer-cell-lines
#16
Zeineb Farhane, Franck Bonnier, Hugh J Byrne
Raman microspectroscopy is a non-invasive, in vitro analytical tool which is being increasingly explored for its potential in clinical applications and monitoring the uptake, mechanism of action and cellular interaction at a molecular level of chemotherapeutic drugs, ultimately as a potential label-free preclinical screening and companion diagnostic tool. In this study, doxorubicin (DOX), a "gold standard" chemotherapeutic drug, is employed as a model in the in vitro lung cancer cell line A549 in order to demonstrate the potential of Raman microspectroscopy to screen and identify spectroscopic markers of its trafficking and mechanism of action...
November 25, 2016: Analytical and Bioanalytical Chemistry
https://www.readbyqxmd.com/read/27888167/delta-notch-signalling-in-segmentation
#17
Bo-Kai Liao, Andrew C Oates
Modular body organization is found widely across multicellular organisms, and some of them form repetitive modular structures via the process of segmentation. It's vastly interesting to understand how these regularly repeated structures are robustly generated from the underlying noise in biomolecular interactions. Recent studies from arthropods reveal similarities in segmentation mechanisms with vertebrates, and raise the possibility that the three phylogenetic clades, annelids, arthropods and chordates, might share homology in this process from a bilaterian ancestor...
November 22, 2016: Arthropod Structure & Development
https://www.readbyqxmd.com/read/27884621/photoantimicrobials-are-we-afraid-of-the-light
#18
REVIEW
Mark Wainwright, Tim Maisch, Santi Nonell, Kristjan Plaetzer, Adelaide Almeida, George P Tegos, Michael R Hamblin
Although conventional antimicrobial drugs have been viewed as miraculous cure-alls for the past 80 years, increasing antimicrobial drug resistance requires a major and rapid intervention. However, the development of novel but still conventional systemic antimicrobial agents, having only a single mode or site of action, will not alleviate the situation because it is probably only a matter of time until any such agents will also become ineffective. To continue to produce new agents based on this notion is unacceptable, and there is an increasing need for alternative approaches to the problem...
November 21, 2016: Lancet Infectious Diseases
https://www.readbyqxmd.com/read/27883152/a-resettable-and-reprogrammable-biomolecular-keypad-lock-with-dual-outputs-based-on-glucose-oxidase-au-nanoclusters-prussian-blue-nanocomposite-films-on-an-electrode-surface
#19
Xue Yu, Menglu Li, Tianrui Li, Shuo Zhou, Hongyun Liu
In this work, electrochromic Prussian blue (PB) films were electrodeposited on the surface of indium tin oxide (ITO) electrodes, and a dispersion mixture of glucose oxidase (GOD), chitosan (CS) and gold nanoclusters (AuNCs) was then cast on the PB surface to form CS-AuNC-GOD/PB nanocomposite film electrodes. The blue PB component in the films could be changed into its colourless reduced form of Prussian white (PW) upon application of -0.2 V. The addition of glucose to the solution would produce H2O2 with the help of GOD in the films and oxygen in the solution, which could oxidize PW back to PB...
November 24, 2016: Nanoscale
https://www.readbyqxmd.com/read/27882699/controlled-retention-and-release-of-biomolecular-transport-systems-using-shape-changing-polymer-bilayers
#20
Georgi Stoychev, Cordula Reuther, Stefan Diez, Leonid Ionov
Biomolecular transport systems based on cytoskeletal filaments and motor proteins have become promising tools for a wide range of nanotechnological applications. In this paper, we report control of such transport systems using substrates with switchable shape. We demonstrate this approach on the example of microtubules gliding on surfaces of self-folding polymer bilayers with adsorbed kinesin motors. The polymer bilayers are able to undergo reversible transitions between flat and tube-like shapes that allow the externally controlled retention and release of gliding microtubules...
November 24, 2016: Angewandte Chemie
keyword
keyword
54480
1
2
Fetch more papers »
Fetching more papers... Fetching...
Read by QxMD. Sign in or create an account to discover new knowledge that matter to you.
Remove bar
Read by QxMD icon Read
×

Search Tips

Use Boolean operators: AND/OR

diabetic AND foot
diabetes OR diabetic

Exclude a word using the 'minus' sign

Virchow -triad

Use Parentheses

water AND (cup OR glass)

Add an asterisk (*) at end of a word to include word stems

Neuro* will search for Neurology, Neuroscientist, Neurological, and so on

Use quotes to search for an exact phrase

"primary prevention of cancer"
(heart or cardiac or cardio*) AND arrest -"American Heart Association"