keyword
MENU ▼
Read by QxMD icon Read
search

Viral glycoprotein-D

keyword
https://www.readbyqxmd.com/read/29455326/new-tetrameric-forms-of-the-rotavirus-nsp4-with-antiparallel-helices
#1
Sushant Kumar, Raghavendra Ramappa, Kiranmayee Pamidimukkala, C D Rao, K Suguna
Rotavirus nonstructural protein 4, the first viral enterotoxin to be identified, is a multidomain, multifunctional glycoprotein. Earlier, we reported a Ca2+ -bound coiled-coil tetrameric structure of the diarrhea-inducing region of NSP4 from the rotavirus strains SA11 and I321 and a Ca2+ -free pentameric structure from the rotavirus strain ST3, all with a parallel arrangement of α-helices. pH was found to determine the oligomeric state: a basic pH favoured a tetramer, whereas an acidic pH favoured a pentamer...
February 17, 2018: Archives of Virology
https://www.readbyqxmd.com/read/29392692/lentiviral-transduction-of-primary-human-glioblastoma-cultures
#2
Joshua D Frenster, Julio Inocencio, Dimitris G Placantonakis
This chapter provides detailed step-by-step instructions for the production of lentiviral particles and the transduction of primary human glioblastoma cultures. Lentiviruses stably transduce both dividing and non-dividing cells, such as quiescent cancer stem cell populations. The viral envelope is pseudotyped with the vesicular stomatitis virus envelope glycoprotein G (VSV-G), which renders the lentiviral particles pantropic, so that they can infect theoretically all cell types. The third generation packaging system used in this protocol produces lentiviruses with important safety features, including replication incompetence and self-inactivation (SIN)...
2018: Methods in Molecular Biology
https://www.readbyqxmd.com/read/29386288/hiv-1-envelope-glycoproteins-from-diverse-clades-differentiate-antibody-responses-and-durability-among-vaccinees
#3
Nicole L Yates, Allan C deCamp, Bette T Korber, Hua-Xin Liao, Carmela Irene, Abraham Pinter, James Peacock, Linda J Harris, Sheetal Sawant, Peter Hraber, Xiaoying Shen, Supachai Rerks-Ngarm, Punnee Pitisuttithum, Sorachai Nitayapan, Phillip W Berman, Merlin L Robb, Giuseppe Pantaleo, Susan Zolla-Pazner, Barton F Haynes, S Munir Alam, David C Montefiori, Georgia D Tomaras
Induction of broadly cross-reactive anti-viral humoral responses with the capacity to target globally diverse circulating strains is a key goal for HIV-1 immunogen design. A major gap in the field is the identification of diverse HIV-1 envelope antigens to evaluate vaccine regimens for binding antibody breadth. In this study, we define unique antigen panels to map HIV-1 vaccine-elicited antibody breadth and durability. Diverse HIV-1 envelope glycoproteins were selected based on genetic and geographic diversity to cover the global epidemic, with a focus on sexually acquired transmitted/founder viruses with a tier-2 neutralization phenotype...
January 31, 2018: Journal of Virology
https://www.readbyqxmd.com/read/29353147/prediction-of-conserved-sites-and-domains-in-glycoproteins-b-c-and-d-of-herpes-viruses
#4
Muhammad Asif Rasheed, Abdur Rahman Ansari, Awais Ihsan, Muhammad Tariq Navid, Shahid Ur-Rehman, Sohail Raza
Glycoprotein B (gB), C (gC) and D (gD) of herpes simplex virus are implicated in virus adsorption and penetration. The gB, gC and gD are glycoproteins for different processes of virus binding and attachment to the host cells. Moreover, their expression is necessary and sufficient to induce cell fusion in the absence of other glycoproteins. Egress of herpes simplex virus (HSV) and other herpes viruses from cells involves extensive modification of cellular membranes and sequential envelopment, de-envelopment and re-envelopment steps...
January 17, 2018: Microbial Pathogenesis
https://www.readbyqxmd.com/read/29346393/computational-study-of-hiv-gp120-as-a-target-for-polyanionic-entry-inhibitors-exploiting-the-v3-loop-region
#5
Louis R Hollingsworth, Anne M Brown, Richard D Gandour, David R Bevan
Multiple approaches are being utilized to develop therapeutics to treat HIV infection. One approach is designed to inhibit entry of HIV into host cells, with a target being the viral envelope glycoprotein, gp120. Polyanionic compounds have been shown to be effective in inhibiting HIV entry, with a mechanism involving electrostatic interactions with the V3 loop of gp120 being proposed. In this study, we applied computational methods to elucidate molecular interactions between the repeat unit of the precisely alternating polyanion, Poly(4,4'-stilbenedicarboxylate-alt-maleic acid) (DCSti-alt-MA) and the V3 loop of gp120 from strains of HIV against which these polyanions were previously tested (IIIb, BaL, 92UG037, JR-CSF) as well as two strains for which gp120 crystal structures are available (YU2, 2B4C)...
2018: PloS One
https://www.readbyqxmd.com/read/29340221/recombinant-antibodies-to-the-ebola-virus-glycoprotein
#6
A A Panina, I G Dementieva, T K Aliev, V A Toporova, D S Balabashin, M N Bokov, L P Pozdnyakova, O B Shchemchukova, D A Dolgikh, P G Sveshnikov, M P Kirpichnikov
Currently, there are no approved therapies for targeted prevention and treatment of Ebola hemorrhagic fever. In the present work, we describe the development of a eukaryotic expression system for the production of three full-length chimeric antibodies (IgG1-kappa isotypes) GPE118, GPE325, and GPE534 to the recombinant glycoprotein of the Ebola virus (EBOV GP), which is a key factor in the pathogenicity of the disease. The immunochemical properties of the obtained antibodies were studied by immunoblotting and indirect, direct, and competitive ELISA using the recombinant EBOV proteins rGPdTM, NP, and VP40...
October 2017: Acta Naturae
https://www.readbyqxmd.com/read/29321320/hiv-1-specific-iga-monoclonal-antibodies-from-an-hiv-1-vaccinee-mediate-galcer-blocking-and-phagocytosis
#7
Saintedym Wills, Kwan-Ki Hwang, Pinghuang Liu, S Moses Dennison, Matthew Zirui Tay, Xiaoying Shen, Justin Pollara, Judith T Lucas, Robert Parks, Supachai Rerks-Ngarm, Punnee Pitisuttithum, Sorachai Nitayapan, Jaranit Kaewkungwal, Rasmi Thomas, Jerome H Kim, Nelson L Michael, Merlin L Robb, Mike McRaven, David C Montefiori, Thomas J Hope, Hua-Xin Liao, M Anthony Moody, Guido Ferrari, Barton F Haynes, S Munir Alam, Mattia Bonsignori, Georgia D Tomaras
Vaccine-elicited humoral immune responses comprise an array of antibody forms and specificities with only a fraction contributing to protective host immunity. Elucidation of antibody effector functions responsible for protective immunity against HIV-1 acquisition is a major goal for the HIV-1 vaccine field. Immunoglobulin A (IgA) is an important part of the host defense against pathogens; however, little is known about the role of vaccine-elicited IgA and their capacity to mediate antiviral functions. To identify the antiviral functions of HIV-1-specific IgA elicited by vaccination, we cloned HIV-1 envelope specific IgA monoclonal antibodies by memory B cell cultures from peripheral blood mononuclear cells from an RV144 vaccinee and produced two IgA clonal cell lines (HG129 and HG130) producing native, non-recombinant IgA monoclonal antibodies (mAbs)...
January 10, 2018: Journal of Virology
https://www.readbyqxmd.com/read/29313728/the-potential-of-currently-unavailable-herpes-virus-vaccines
#8
Július Rajcáni, Ferenc Bánáti, Kálmán Szenthe, Susan Szathmary
Despite overwhelming experimental work, there are no licensed vaccines against the most frequent Alphaherpesviruses, namely herpes simplex virus 1 and 2 (HSV1 and 2) nor against the Epstein-Barr virus (EBV), a member of the subfamily Gammaherpesvirus. Areas covered: Since the DNAs of both HSVs reside in the regional sensory ganglia in a latent state (i.e. as circularized episomal molecules), a corresponding vaccine might be useful for immunotherapy rather than prevention of primary infection. Here we describe the design of a purified subunit vaccine (a mix of at least 3 glycoproteins) as well as the preparation and efficacy of a recombinant fusion protein consisting of the gD ectodomain from our domestic attenuated HSV1 strain HSZP...
January 9, 2018: Expert Review of Vaccines
https://www.readbyqxmd.com/read/29310678/computational-analysis-of-envelope-glycoproteins-from-diverse-geographical-isolates-of-bovine-leukemia-virus-identifies-highly-conserved-peptide-motifs
#9
Aneta Pluta, Lorraine M Albritton, Marzena Rola-Łuszczak, Jacek Kuźmak
BACKGROUND: Bovine leukemia virus (BLV) is a deltaretrovirus infecting bovine B cells and causing enzootic bovine leucosis. The SU or surface subunit, gp51, of its envelope glycoprotein is involved in receptor recognition and virion attachment. It contains the major neutralizing and CD4+ and CD8+ T cell epitopes found in naturally infected animals. In this study, we aimed to determine global variation and conservation within gp51 in the context of developing an effective global BLV vaccine...
January 8, 2018: Retrovirology
https://www.readbyqxmd.com/read/29303554/a-serological-point-of-care-test-for-the-detection-of-igg-antibodies-against-ebola-virus-in-human-survivors
#10
Polina Brangel, Ariel Sobarzo, Claudio Parolo, Benjamin S Miller, Philip D Howes, Sigal Gelkop, Julius J Lutwama, John M Dye, Rachel A McKendry, Leslie Lobel, Molly M Stevens
Ebola virus disease causes widespread and highly fatal epidemics in human populations. Today, there is still great need for point-of-care tests for diagnosis, patient management and surveillance, both during and post outbreaks. We present a point-of-care test comprising an immunochromatographic strip and a smartphone reader, which detects and semiquantifies Ebola-specific antibodies in human survivors. We developed a Sudan virus glycoprotein monoplex platform and validated it using sera from 90 human survivors and 31 local noninfected controls...
January 5, 2018: ACS Nano
https://www.readbyqxmd.com/read/29176979/us6-gene-deletion-in-herpes-simplex-virus-type-2-enhances-dendritic-cell-function-and-t-cell-activation
#11
Angello Retamal-Díaz, Kayla A Weiss, Eduardo I Tognarelli, Mariela Freire, Susan M Bueno, Betsy C Herold, William R Jacobs, Pablo A González
Herpes simplex virus (HSV) type 1 (HSV-1) and type 2 (HSV-2) produce lifelong infections that are associated with frequent asymptomatic or clinically apparent reactivation. Importantly, HSV express multiple virulence factors that negatively modulate innate and adaptive immune components. Notably, HSV interfere with dendritic cell (DC) viability and function, likely hindering the capacity of the host to mount effective immunity against these viruses. Recently, an HSV-2 virus that was deleted in glycoprotein D was engineered (designated ΔgD-2)...
2017: Frontiers in Immunology
https://www.readbyqxmd.com/read/29166910/prevalence-and-genetic-diversity-analysis-of-human-coronaviruses-among-cross-border-children
#12
Peilin Liu, Lei Shi, Wei Zhang, Jianan He, Chunxiao Liu, Chunzhong Zhao, Siu Kai Kong, Jacky Fong Chuen Loo, Dayong Gu, Longfei Hu
BACKGROUND: More than a decade after the outbreak of human coronaviruses (HCoVs) SARS in Guangdong province and Hong Kong SAR of China in 2002, there is still no reoccurrence, but the evolution and recombination of the coronaviruses in this region are still unknown. Therefore, surveillance on the prevalence and the virus variation of HCoVs circulation in this region is conducted. METHODS: A total of 3298 nasopharyngeal swabs samples were collected from cross-border children (<6 years, crossing border between Southern China and Hong Kong SAR) showing symptoms of respiratory tract infection, such as fever (body temperature > 37...
November 22, 2017: Virology Journal
https://www.readbyqxmd.com/read/29160219/complete-sequences-of-4-viral-hemorrhagic-septicemia-virus-ivb-isolates-and-their-virulence-in-northern-pike-fry
#13
Rodman G Getchell, Emily R Cornwell, Steven Bogdanowicz, Jose Andrés, William N Batts, Gael Kurath, Rachel Breyta, Joanna G Choi, John M Farrell, Paul R Bowser
Four viral hemorrhagic septicemia virus (VHSV) genotype IVb isolates were sequenced, their genetic variation explored, and comparative virulence assayed with experimental infections of northern pike Esox lucius fry. In addition to the type strain MI03, the complete 11183 bp genome of the first round goby Neogobius melanostomus isolate from the St. Lawrence River, and the 2013 and 2014 isolates from gizzard shad Dorosoma cepedianum die-offs in Irondequoit Bay, Lake Ontario and Dunkirk Harbor, Lake Erie were all deep sequenced on an Illumina platform...
November 21, 2017: Diseases of Aquatic Organisms
https://www.readbyqxmd.com/read/29149197/sieve-analysis-of-breakthrough-hiv-1-sequences-in-hvtn-505-identifies-vaccine-pressure-targeting-the-cd4-binding-site-of-env-gp120
#14
Allan C deCamp, Morgane Rolland, Paul T Edlefsen, Eric Sanders-Buell, Breana Hall, Craig A Magaret, Andrew J Fiore-Gartland, Michal Juraska, Lindsay N Carpp, Shelly T Karuna, Meera Bose, Steven LePore, Shana Miller, Annemarie O'Sullivan, Kultida Poltavee, Hongjun Bai, Kalpana Dommaraju, Hong Zhao, Kim Wong, Lennie Chen, Hasan Ahmed, Derrick Goodman, Matthew Z Tay, Raphael Gottardo, Richard A Koup, Robert Bailer, John R Mascola, Barney S Graham, Mario Roederer, Robert J O'Connell, Nelson L Michael, Merlin L Robb, Elizabeth Adams, Patricia D'Souza, James Kublin, Lawrence Corey, Daniel E Geraghty, Nicole Frahm, Georgia D Tomaras, M Juliana McElrath, Lisa Frenkel, Sheila Styrchak, Sodsai Tovanabutra, Magdalena E Sobieszczyk, Scott M Hammer, Jerome H Kim, James I Mullins, Peter B Gilbert
Although the HVTN 505 DNA/recombinant adenovirus type 5 vector HIV-1 vaccine trial showed no overall efficacy, analysis of breakthrough HIV-1 sequences in participants can help determine whether vaccine-induced immune responses impacted viruses that caused infection. We analyzed 480 HIV-1 genomes sampled from 27 vaccine and 20 placebo recipients and found that intra-host HIV-1 diversity was significantly lower in vaccine recipients (P ≤ 0.04, Q-values ≤ 0.09) in Gag, Pol, Vif and envelope glycoprotein gp120 (Env-gp120)...
2017: PloS One
https://www.readbyqxmd.com/read/29142124/truncating-the-gp41-cytoplasmic-tail-of-siv-decreases-sensitivity-to-neutralizing-antibodies-without-increasing-envelope-content-of-virions
#15
Ellen White, Fan Wu, Elena Chertova, Julian Bess, James D Roser, Jeffrey D Lifson, Vanessa M Hirsch
An incomplete understanding of native HIV and SIV envelope glycoprotein (Env) impedes the development of structural models of Env and vaccine design. This shortcoming is due in part to the low number of Env trimers on virus particles. For SIV, this low expression can be counteracted by truncating the cytoplasmic tail (CT) of Env. CT truncation has been shown to increase Env incorporation into the virion and is commonly used in vaccine and imaging studies, but its effects on viral antigenicity have not been fully elucidated...
November 15, 2017: Journal of Virology
https://www.readbyqxmd.com/read/29114027/an-alphavirus-e2-membrane-proximal-domain-promotes-envelope-protein-lateral-interactions-and-virus-budding
#16
Emily A Byrd, Margaret Kielian
Alphaviruses are members of a group of small enveloped RNA viruses that includes important human pathogens such as Chikungunya virus and the equine encephalitis viruses. The virus membrane is covered by a lattice composed of 80 spikes, each a trimer of heterodimers of the E2 and E1 transmembrane proteins. During virus endocytic entry, the E1 glycoprotein mediates the low-pH-dependent fusion of the virus membrane with the endosome membrane, thus initiating virus infection. While much is known about E1 structural rearrangements during membrane fusion, it is unclear how the E1/E2 dimer dissociates, a step required for the fusion reaction...
November 7, 2017: MBio
https://www.readbyqxmd.com/read/29063173/bovine-single-chain-fv-antibody-inhibits-bovine-herpesvirus-1-infectivity-by-targeting-viral-glycoprotein-d
#17
Jian Xu, Jing Wu, Bo Jiang, Houjun He, Xixi Zhang, Xiaoyang Li, Dawei Yang, Xiufen Huang, Joshua E Sealy, Munir Iqbal, Yongqing Li
Glycoprotein D (gD) of bovine herpesvirus-1 (BoHV-1) is essential for attachment and penetration of cells during infection and is a major target for neutralizing antibodies during an adaptive immune response. Currently there are no recombinant antibodies capable of binding gD epitopes for use in treating BoHV-1 infection. In this study, a bovine scFv gene derived from a hybridoma secreting monoclonal antibodies (McAbs) against the amino acid motif MEESKGYEPP of gD was expressed in E. coli. Molecular modeling, western blot and ELISA analysis showed that this scFv had a high affinity for BoHV-1 gD, with a Kd of 161...
December 2017: Applied Microbiology and Biotechnology
https://www.readbyqxmd.com/read/29062078/design-and-evaluation-of-the-immunogenicity-and-efficacy-of-a-biomimetic-particulate-formulation-of-viral-antigens
#18
Victor Riitho, Adam A Walters, Satyanarayana Somavarapu, Benjamin Lamp, Till Rümenapf, Thomas Krey, Felix A Rey, Ernesto Oviedo-Orta, Graham R Stewart, Nicolas Locker, Falko Steinbach, Simon P Graham
Subunit viral vaccines are typically not as efficient as live attenuated or inactivated vaccines at inducing protective immune responses. This paper describes an alternative 'biomimetic' technology; whereby viral antigens were formulated around a polymeric shell in a rationally arranged fashion with a surface glycoprotein coated on to the surface and non-structural antigen and adjuvant encapsulated. We evaluated this model using BVDV E2 and NS3 proteins formulated in poly-(D, L-lactic-co-glycolic acid) (PLGA) nanoparticles adjuvanted with polyinosinic:polycytidylic acid (poly(I:C) as an adjuvant (Vaccine-NP)...
October 23, 2017: Scientific Reports
https://www.readbyqxmd.com/read/29051495/the-%C3%AE-20-%C3%AE-21-of-gp120-is-a-regulatory-switch-for-hiv-1-env-conformational-transitions
#19
Alon Herschhorn, Christopher Gu, Francesca Moraca, Xiaochu Ma, Mark Farrell, Amos B Smith, Marie Pancera, Peter D Kwong, Arne Schön, Ernesto Freire, Cameron Abrams, Scott C Blanchard, Walther Mothes, Joseph G Sodroski
The entry of HIV-1 into target cells is mediated by the viral envelope glycoproteins (Env). Binding to the CD4 receptor triggers a cascade of conformational changes in distant domains that move Env from a functionally "closed" State 1 to more "open" conformations, but the molecular mechanisms underlying allosteric regulation of these transitions are still elusive. Here, we develop chemical probes that block CD4-induced conformational changes in Env and use them to identify a potential control switch for Env structural rearrangements...
October 19, 2017: Nature Communications
https://www.readbyqxmd.com/read/29038280/targeting-human-cytomegalovirus-infected-cells-by-redirecting-t-cells-using-an-anti-cd3-anti-gb-bispecific-antibody
#20
Weixu Meng, Aimin Tang, Xiaohua Ye, Xun Gui, Leike Li, Xuejun Fan, Robbie D Schultz, Daniel C Freed, Sha Ha, Dai Wang, Ningyan Zhang, Tong-Ming Fu, Zhiqiang An
Host immune response to human cytomegalovirus (HCMV) is effective against HCMV reactivation from latency although not sufficient to clear the virus. T cells are primarily responsible for control of the viral reactivation. When host immune system is compromised, as in transplant recipients with immunosuppression, HCMV reactivation and progressive infection can cause serious morbidity and mortality. Adoptive T cell therapy is effective for control of HCMV infection in transplant recipients. However, it is a highly personalized therapeutic regimen, and difficult to implement in routine clinical practice...
October 16, 2017: Antimicrobial Agents and Chemotherapy
keyword
keyword
69196
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"