keyword
MENU ▼
Read by QxMD icon Read
search

capsid

keyword
https://www.readbyqxmd.com/read/28643555/unexpected-detection-of-porcine-rotavirus-c-strains-carrying-human-origin-vp6-gene
#1
Jobin Jose Kattoor, Sharad Saurabh, Yashpal Singh Malik, Shubhankar Sircar, Kuldeep Dhama, Souvik Ghosh, Krisztián Bányai, Nobumichi Kobayashi, Raj Kumar Singh
BACKGROUND: Rotavirus C (RVC), a known etiological agent of diarrheal outbreaks, mainly inflicts swine population globally with sporadic incidence in human, cattle, ferret, mink and dog. OBJECTIVE: To demonstrate presence of RVC in Indian swine population and characterisation of its selected structural (VP6) and non-structural (NSP4 and NSP5) genes. METHODS: A total of 108 diarrheic samples from different regions of India were used. Isolated RNA was loaded onto polyacrylamide gel to screen for the presence of RVs through the identification of specific electrophoretic genomic migration pattern...
June 23, 2017: Veterinary Quarterly
https://www.readbyqxmd.com/read/28643379/tuning-the-inter-nanofibril-interaction-to-regulate-the-morphology-and-function-of-peptide-dna-co-assembled-viral-mimics
#2
Rong Ni, Ying Chau
The ability to tune the inter-subunit interaction within the virus capsid may be critical to assembly and biological function. This process has been extended here with peptide/DNA co-assembled viral mimics. The resulting co-assemblies, formed and stabilized by both DNA-peptide nanofibril and peptide nanofibril-nanofibril interactions, have been tuned through hydrophobic packing interactions of the peptide sequences. By strengthening peptide side chain complementarity and/or elongating the peptide chain (from 4 to 8 residues), we report strengthening the inter-nanofibril interaction to create stable nanococoons with high gene transfection efficacy...
June 22, 2017: Angewandte Chemie
https://www.readbyqxmd.com/read/28643180/first-complete-genome-sequences-of-genogroup-v-genotype-3-porcine-sapoviruses-common-5-terminal-genomic-feature-of-sapoviruses
#3
Tomoichiro Oka, Yen Hai Doan, Takashi Shimoike, Kei Haga, Takenori Takizawa
Sapoviruses (SaVs) are enteric viruses and have been detected in various mammals. They are divided into multiple genogroups and genotypes based on the entire major capsid protein (VP1) encoding region sequences. In this study, we determined the first complete genome sequences of two genogroup V, genotype 3 (GV.3) SaV strains detected from swine fecal samples, in combination with Illumina MiSeq sequencing of the libraries prepared from viral RNA and PCR products. The lengths of the viral genome (7494 nucleotides [nt] excluding polyA tail) and short 5'-untranslated region (14 nt) as well as two predicted open reading frames are similar to those of other SaVs...
June 22, 2017: Virus Genes
https://www.readbyqxmd.com/read/28642849/aim2-co-immunization-with-vp1-is-associated-with-increased-memory-cd8-t-cells-and-mounts-long-lasting-protection-against-coxsackievirus-b3-challenge
#4
Liang Yin, Dafei Chai, Yan Yue, Chunsheng Dong, Sidong Xiong
The recurrent Coxsackievirus B3 (CVB3) infection is the most important cause of intractable myocarditis which often leads to chronic myocarditis and even dilated cardiomyopathy. Therefore, enhanced DNA vaccines capable of memory CD8 T cells are essential for long-lasting immunological protection against CVB3 infection. In this study, absent in melanoma 2 (AIM2) was used as an adjuvant to enhance the induction of memory CD8 T cells elicited by VP1 (viral capsid protein 1) vaccine. Mice were intramuscularly injected with 50 μg AIM2 plasmid and equal amount of VP1 plasmid (pAIM2/pVP1) vaccine 4 times at 2 week-intervals...
2017: Frontiers in Cellular and Infection Microbiology
https://www.readbyqxmd.com/read/28642465/structural-basis-for-biologically-relevant-mechanical-stiffening-of-a-virus-capsid-by-cavity-creating-or-spacefilling-mutations
#5
Pablo Guerra, Alejandro Valbuena, Jordi Querol-Audí, Cristina Silva, Milagros Castellanos, Alicia Rodríguez-Huete, Damià Garriga, Mauricio G Mateu, Nuria Verdaguer
Recent studies reveal that the mechanical properties of virus particles may have been shaped by evolution to facilitate virus survival. Manipulation of the mechanical behavior of virus capsids is leading to a better understanding of viral infection, and to the development of virus-based nanoparticles with improved mechanical properties for nanotechnological applications. In the minute virus of mice (MVM), deleterious mutations around capsid pores involved in infection-related translocation events invariably increased local mechanical stiffness and interfered with pore-associated dynamics...
June 22, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28639939/model-for-a-novel-membrane-envelope-in-a-filamentous-hyperthermophilic-virus
#6
Edward H Egelman, Peter M Kasson, Frank DiMaio, Xiong Yu, Soizick Lucas-Staat, Mart Krupovic, Stefan Schouten, David Prangishvili
Biological membranes create compartments, and are usually formed by lipid bilayers. However, in hyperthermophilic archaea that live optimally at temperatures above 80°C the membranes are monolayers which resemble fused bilayers. Many double-stranded DNA viruses which parasitize such hosts, including the filamentous virus AFV1 of Acidianus hospitalis, are enveloped with a lipid-containing membrane. Using cryo-EM, we show that the membrane in AFV1 is a ~2 nm-thick monolayer, approximately half the expected membrane thickness, formed by host membrane-derived lipids which adopt a U-shaped 'horseshoe' conformation...
June 22, 2017: ELife
https://www.readbyqxmd.com/read/28637924/vp4-and-vp7-specific-antibodies-mediate-heterotypic-immunity-to-rotavirus-in-humans
#7
Nitya Nair, Ningguo Feng, Lisa K Blum, Mrinmoy Sanyal, Siyuan Ding, Baoming Jiang, Adrish Sen, John M Morton, Xiao-Song He, William H Robinson, Harry B Greenberg
Human rotaviruses (RVs) are the leading cause of severe diarrhea in young children worldwide. The molecular mechanisms underlying the rapid induction of heterotypic protective immunity to RV, which provides the basis for the efficacy of licensed monovalent RV vaccines, have remained unknown for more than 30 years. We used RV-specific single cell-sorted intestinal B cells from human adults, barcode-based deep sequencing of antibody repertoires, monoclonal antibody expression, and serologic and functional characterization to demonstrate that infection-induced heterotypic immunoglobulins (Igs) primarily directed to VP5*, the stalk region of the RV attachment protein, VP4, are able to mediate heterotypic protective immunity...
June 21, 2017: Science Translational Medicine
https://www.readbyqxmd.com/read/28635326/encapsulins-molecular-biology-of-the-shell
#8
Robert J Nichols, Caleb Cassidy-Amstutz, Thawatchai Chaijarasphong, David F Savage
Compartmentalization is both a fundamental principle of cellular organization and an emerging theme in prokaryotic biology. Work in the past few decades has shown that protein-based organelles called microcompartments enhance the function of encapsulated cargo proteins. More recently, the repertoire of known prokaryotic organelles has expanded beyond microcompartments to include a new class of smaller proteinaceous compartments, termed nanocompartments (also known as encapsulins). Nanocompartments are icosahedral capsids that are smaller and less complex than microcompartments...
June 21, 2017: Critical Reviews in Biochemistry and Molecular Biology
https://www.readbyqxmd.com/read/28634337/evolutionary-and-network-analysis-of-virus-sequences-from-infants-infected-with-an-australian-recombinant-strain-of-human-parechovirus-type-3
#9
Soren Alexandersen, Tiffanie M Nelson, Jason Hodge, Julian Druce
We present the near complete virus genome sequences with phylogenetic and network analyses of potential transmission networks of a total of 18 Australian cases of human parechovirus type 3 (HPeV3) infection in infants in the period from 2012-2015. Overall the results support our previous finding that the Australian outbreak strain/lineage is a result of a major recombination event that took place between March 2012 and November 2013 followed by further virus evolution and possibly recombination. While the nonstructural coding region of unknown provenance appears to evolve significantly both at the nucleotide and amino acid level, the capsid encoding region derived from the Yamagata 2011 lineage of HPeV3 appears to be very stable, particularly at the amino acid level...
June 20, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28634106/biology-evolution-and-medical-importance-of-polyomaviruses-an-update
#10
REVIEW
Ugo Moens, Andi Krumbholz, Bernhard Ehlers, Roland Zell, Reimar Johne, Sébastien Calvignac-Spencer, Chris Lauber
The family Polyomaviridae encompasses non-enveloped viruses with a circular dsDNA genome that is typically approximately 5000bp in length. Originally isolated from mammals, polyomavirus sequences have now been detected in invertebrates, fish, amphibians, reptiles and birds, although it remains to be determined whether all these animals are genuine hosts. The genomes of all polyomaviruses encode at least two regulatory proteins (large and small tumour antigen) and two structural proteins (capsid proteins VP1 and VP2) whose functions have been defined...
June 17, 2017: Infection, Genetics and Evolution
https://www.readbyqxmd.com/read/28631927/stabilization-of-a-virus-like-particle-and-its-application-as-a-nanoreactor-at-physiological-conditions
#11
Lise Schoonen, Sjors Maassen, Roeland J M Nolte, Jan C M van Hest
Virus-like particles are very interesting tools for application in bio-nanotechnology, due to their monodisperse features and biocompatibility. In particular, the cowpea chlorotic mottle virus (CCMV) capsid has been studied extensively as it can be assembled and disassembled reversibly, facilitating cargo encapsulation. CCMV is, however, only stable at physiological conditions when its endogenous nucleic acid cargo is present. To gain more flexibility in the type of cargo encapsulated and to broaden the window of operation, it is interesting to improve the stability of the empty virus-like particles...
June 20, 2017: Biomacromolecules
https://www.readbyqxmd.com/read/28631756/giant-capsids-from-lattice-self-assembly-of-cyclodextrin-complexes
#12
Shenyu Yang, Yun Yan, Jianbin Huang, Andrei V Petukhov, Loes M J Kroon-Batenburg, Markus Drechsler, Chengcheng Zhou, Mei Tu, Steve Granick, Lingxiang Jiang
Proteins can readily assemble into rigid, crystalline and functional structures such as viral capsids and bacterial compartments. Despite ongoing advances, it is still a fundamental challenge to design and synthesize protein-mimetic molecules to form crystalline structures. Here we report the lattice self-assembly of cyclodextrin complexes into a variety of capsid-like structures such as lamellae, helical tubes and hollow rhombic dodecahedra. The dodecahedral morphology has not hitherto been observed in self-assembly systems...
June 20, 2017: Nature Communications
https://www.readbyqxmd.com/read/28630939/retrospective-surveillance-of-wastewater-to-examine-seasonal-dynamics-of-enterovirus-infections
#13
Nichole E Brinkman, G Shay Fout, Scott P Keely
Enteroviruses are RNA viruses that are responsible for both mild gastroenteritis and mild respiratory illnesses as well as debilitating diseases such as meningitis and myocarditis. The disease burden of enteroviruses in the United States is difficult to assess because most infections are not recorded. Since infected individuals shed enterovirus in feces and urine, surveillance of municipal wastewater can reveal the diversity of enteroviruses circulating in human populations. Therefore, monthly municipal wastewater samples were collected for 1 year and enteroviruses were quantified by reverse transcriptase quantitative PCR and identified by next-generation, high-throughput sequencing...
May 2017: MSphere
https://www.readbyqxmd.com/read/28630128/identification-of-a-d-arabinose-5-phosphate-isomerase-in-the-gram-positive-clostridium-tetani
#14
David L Cech, Katherine Markin, Ronald W Woodard
d-Arabinose-5-phosphate isomerases (APIs) catalyze the interconversion of d-ribulose-5-phosphate and d-arabinose-5-phosphate. Various Gram-negative bacteria, such as the uropathogenic E. coli strain CFT073, contain multiple API paralogs (KdsD, GutQ, KpsF and c3406) that have been assigned various cellular functions. The d-arabinose-5-phosphate formed by these enzymes seems to play important roles in the biosynthesis of lipopolysaccharide and group 2 K-antigen capsules, as well as in the regulation of the cellular d-glucitol uptake and uropathogenic infectivity/virulence...
June 19, 2017: Journal of Bacteriology
https://www.readbyqxmd.com/read/28629822/structure-based-designed-nano-dysferlin-significantly-improves-dysferlinopathy-in-bla-j-mice
#15
Telmo Llanga, Nadia Nagy, Laura Conatser, Catherine Dial, R Bryan Sutton, Matthew L Hirsch
Dysferlinopathy is an autosomal recessive muscular dystrophy characterized by the progressive loss of motility that is caused by mutations throughout the DYSF gene. There are currently no approved therapies that ameliorate or reverse dysferlinopathy. Gene delivery using adeno-associated vectors (AAVs) is a leading therapeutic strategy for genetic diseases; however, the large size of dysferlin cDNA (6.2 kB) precludes packaging into a single AAV capsid. Therefore, using 3D structural modeling and hypothesizing dysferlin C2 domain redundancy, a 30% smaller, dysferlin-like molecule amenable to single AAV vector packaging was engineered (termed Nano-Dysferlin)...
June 16, 2017: Molecular Therapy: the Journal of the American Society of Gene Therapy
https://www.readbyqxmd.com/read/28628648/the-adenovirus-major-core-protein-vii-is-dispensable-for-virion-assembly-but-is-essential-for-lytic-infection
#16
Philomena Ostapchuk, Maarit Suomalainen, Yueting Zheng, Karin Boucke, Urs F Greber, Patrick Hearing
The Adenovirus (Ad) genome within the capsid is tightly associated with a virus-encoded, histone-like core protein-protein VII. Two other Ad core proteins, V and X/μ, also are located within the virion and are loosely associated with viral DNA. Core protein VII remains associated with the Ad genome during the early phase of infection. It is not known if naked Ad DNA is packaged into the capsid, as with dsDNA bacteriophage and herpesviruses, followed by the encapsidation of viral core proteins, or if a unique packaging mechanism exists with Ad where a DNA-protein complex is simultaneously packaged into the virion...
June 19, 2017: PLoS Pathogens
https://www.readbyqxmd.com/read/28628105/identification-of-liver-specific-enhancer-promoter-activity-in-the-3-untranslated-region-of-the-wild-type-aav2-genome
#17
Grant J Logan, Allison P Dane, Claus V Hallwirth, Christine M Smyth, Emilie E Wilkie, Anais K Amaya, Erhua Zhu, Neeta Khandekar, Samantha L Ginn, Sophia H Y Liao, Sharon C Cunningham, Natsuki Sasaki, Martí Cabanes-Creus, Patrick P L Tam, David W Russell, Leszek Lisowski, Ian E Alexander
Vectors based on adeno-associated virus type 2 (AAV2) are powerful tools for gene transfer and genome editing applications. The level of interest in this system has recently surged in response to reports of therapeutic efficacy in human clinical trials, most notably for those in patients with hemophilia B (ref. 3). Understandably, a recent report drawing an association between AAV2 integration events and human hepatocellular carcinoma (HCC) has generated controversy about the causal or incidental nature of this association and the implications for AAV vector safety...
June 19, 2017: Nature Genetics
https://www.readbyqxmd.com/read/28627251/direct-lc-ms-analysis-for-complete-characterization-of-recombinant-adeno-associated-virus-capsid-proteins
#18
Xiaoying Jin, Lin Liu, Shelley Nass, Catherine R O'Riordan, Eric Pastor, Kate Xiaokui Zhang
The requirement for robust analytical methods to support characterization of Adeno-Associated Virus (AAV) vectors is immediate, as the field advances more AAV gene therapeutics into the clinic and onto commercialization. AAV capsid proteins (VPs) are critical for viral infectivity and vector potency, thus, complete characterization of the constituent viral capsid proteins of AAV vector therapeutics, including their sequence and post-translational modifications (PTMs), is highly recommended to ensure AAV product quality and consistency...
June 18, 2017: Human Gene Therapy Methods
https://www.readbyqxmd.com/read/28623276/gag-protease-coevolution-analyses-define-novel-structural-surfaces-in-the-hiv-1-matrix-and-capsid-involved-in-resistance-to-protease-inhibitors
#19
Francisco M Codoñer, Ruth Peña, Oscar Blanch-Lombarte, Esther Jimenez-Moyano, Maria Pino, Thomas Vollbrecht, Bonaventura Clotet, Javier Martinez-Picado, Rika Draenert, Julia G Prado
Despite the major role of Gag in establishing resistance of HIV-1 to protease inhibitors (PIs), very limited data are available on the total contribution of Gag residues to resistance to PIs. To identify in detail Gag residues and structural interfaces associated with the development of HIV-1 resistance to PIs, we traced viral evolution under the pressure of PIs using Gag-protease single genome sequencing and coevolution analysis of protein sequences in 4 patients treated with PIs over a 9-year period. We identified a total of 38 Gag residues correlated with the protease, 32 of which were outside Gag cleavage sites...
June 16, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28623258/chromatin-organization-regulates-viral-egress-dynamics
#20
Vesa Aho, Markko Myllys, Visa Ruokolainen, Satu Hakanen, Elina Mäntylä, Jori Virtanen, Veijo Hukkanen, Thomas Kühn, Jussi Timonen, Keijo Mattila, Carolyn A Larabell, Maija Vihinen-Ranta
Various types of DNA viruses are known to elicit the formation of a large nuclear viral replication compartment and marginalization of the cell chromatin. We used three-dimensional soft x-ray tomography, confocal and electron microscopy, combined with numerical modelling of capsid diffusion to analyse the molecular organization of chromatin in herpes simplex virus 1 infection and its effect on the transport of progeny viral capsids to the nuclear envelope. Our data showed that the formation of the viral replication compartment at late infection resulted in the enrichment of heterochromatin in the nuclear periphery accompanied by the compaction of chromatin...
June 16, 2017: Scientific Reports
keyword
keyword
109276
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"