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Noel A, Zhang J, Shen H, Saxena A, Groeltz-Thrush J, Li G, Rahe MC. Bovine Rhinitis B Virus Variant as the Putative Cause of Bronchitis in Goat Kids. Viruses 2024; 16:1023. [PMID: 39066186 PMCID: PMC11281505 DOI: 10.3390/v16071023] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/19/2024] [Revised: 06/21/2024] [Accepted: 06/21/2024] [Indexed: 07/28/2024] Open
Abstract
A diagnostic investigation into an outbreak of fatal respiratory disease among young goats in Iowa, USA revealed bronchitis lesions of unknown etiology and secondary bacterial bronchopneumonia. Hypothesis-free metagenomics identified a previously unreported picornavirus (USA/IA26017/2023), and further phylogenetic analysis classified USA/IA26017/2023 as an aphthovirus related to bovine rhinitis B virus. Viral nucleic acid was localized to lesions of bronchitis using in situ hybridization. This marks the first report of a picornavirus putatively causing respiratory disease in goats and highlights the potential for cross-species transmission of aphthoviruses.
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Affiliation(s)
- Andrew Noel
- Veterinary Diagnostic and Production Animal Medicine, College of Veterinary Medicine, Iowa State University, Ames, IA 50011, USA; (A.N.)
| | - Jianqiang Zhang
- Veterinary Diagnostic and Production Animal Medicine, College of Veterinary Medicine, Iowa State University, Ames, IA 50011, USA; (A.N.)
| | - Huigang Shen
- Veterinary Diagnostic and Production Animal Medicine, College of Veterinary Medicine, Iowa State University, Ames, IA 50011, USA; (A.N.)
| | - Anugrah Saxena
- Veterinary Diagnostic and Production Animal Medicine, College of Veterinary Medicine, Iowa State University, Ames, IA 50011, USA; (A.N.)
| | - Jennifer Groeltz-Thrush
- Veterinary Diagnostic and Production Animal Medicine, College of Veterinary Medicine, Iowa State University, Ames, IA 50011, USA; (A.N.)
| | - Ganwu Li
- Veterinary Diagnostic and Production Animal Medicine, College of Veterinary Medicine, Iowa State University, Ames, IA 50011, USA; (A.N.)
| | - Michael C. Rahe
- Veterinary Diagnostic and Production Animal Medicine, College of Veterinary Medicine, Iowa State University, Ames, IA 50011, USA; (A.N.)
- Department of Population Health and Pathobiology, College of Veterinary Medicine, North Carolina State University, Raleigh, NC 27607, USA
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Mohammadifar E, Ahmadi V, Gholami MF, Oehrl A, Kolyvushko O, Nie C, Donskyi IS, Herziger S, Radnik J, Ludwig K, Böttcher C, Rabe JP, Osterrieder K, Azab W, Haag R, Adeli M. Graphene-Assisted Synthesis of 2D Polyglycerols as Innovative Platforms for Multivalent Virus Interactions. ADVANCED FUNCTIONAL MATERIALS 2021; 31:2009003. [PMID: 34230823 PMCID: PMC8250216 DOI: 10.1002/adfm.202009003] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/21/2020] [Revised: 02/08/2021] [Indexed: 05/12/2023]
Abstract
2D nanomaterials have garnered widespread attention in biomedicine and bioengineering due to their unique physicochemical properties. However, poor functionality, low solubility, intrinsic toxicity, and nonspecific interactions at biointerfaces have hampered their application in vivo. Here, biocompatible polyglycerol units are crosslinked in two dimensions using a graphene-assisted strategy leading to highly functional and water-soluble polyglycerols nanosheets with 263 ± 53 nm and 2.7 ± 0.2 nm average lateral size and thickness, respectively. A single-layer hyperbranched polyglycerol containing azide functional groups is covalently conjugated to the surface of a functional graphene template through pH-sensitive linkers. Then, lateral crosslinking of polyglycerol units is carried out by loading tripropargylamine on the surface of graphene followed by lifting off this reagent for an on-face click reaction. Subsequently, the polyglycerol nanosheets are detached from the surface of graphene by slight acidification and centrifugation and is sulfated to mimic heparin sulfate proteoglycans. To highlight the impact of the two-dimensionality of the synthesized polyglycerol sulfate nanosheets at nanobiointerfaces, their efficiency with respect to herpes simplex virus type 1 and severe acute respiratory syndrome corona virus 2 inhibition is compared to their 3D nanogel analogs. Four times stronger in virus inhibition suggests that 2D polyglycerols are superior to their current 3D counterparts.
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Affiliation(s)
- Ehsan Mohammadifar
- Institut für Chemie und BiochemieFreie Universität BerlinTakustrasse 314195BerlinGermany
| | - Vahid Ahmadi
- Institut für Chemie und BiochemieFreie Universität BerlinTakustrasse 314195BerlinGermany
| | - Mohammad Fardin Gholami
- Department of Physics and Integrative Research Institute for the Sciences IRIS AdlershofHumboldt‐Universität zu BerlinNewtonstrasse 15 and Zum Großen Windkanal 212489BerlinGermany
| | - Alexander Oehrl
- Institut für Chemie und BiochemieFreie Universität BerlinTakustrasse 314195BerlinGermany
| | - Oleksandr Kolyvushko
- Institut für VirologieRobert von Ostertag‐HausZentrum für InfektionsmedizinFreie Universität BerlinRobert‐von‐Ostertag‐Str. 7‐1314163BerlinGermany
| | - Chuanxiong Nie
- Institut für Chemie und BiochemieFreie Universität BerlinTakustrasse 314195BerlinGermany
| | - Ievgen S. Donskyi
- Institut für Chemie und BiochemieFreie Universität BerlinTakustrasse 314195BerlinGermany
- BAM – Federal Institute for Material Science and Testing Division of Surface Analysis, and Interfacial ChemistryUnter den Eichen 44‐4612205BerlinGermany
| | - Svenja Herziger
- Forschungszentrum für Elektronenmikroskopie and Core Facility BioSupraMolInstitut für Chemie und Biochemie Freie Universität BerlinFabeckstrasse 36a14195BerlinGermany
| | - Jörg Radnik
- BAM – Federal Institute for Material Science and Testing Division of Surface Analysis, and Interfacial ChemistryUnter den Eichen 44‐4612205BerlinGermany
| | - Kai Ludwig
- Forschungszentrum für Elektronenmikroskopie and Core Facility BioSupraMolInstitut für Chemie und Biochemie Freie Universität BerlinFabeckstrasse 36a14195BerlinGermany
| | - Christoph Böttcher
- Forschungszentrum für Elektronenmikroskopie and Core Facility BioSupraMolInstitut für Chemie und Biochemie Freie Universität BerlinFabeckstrasse 36a14195BerlinGermany
| | - Jürgen P. Rabe
- Department of Physics and Integrative Research Institute for the Sciences IRIS AdlershofHumboldt‐Universität zu BerlinNewtonstrasse 15 and Zum Großen Windkanal 212489BerlinGermany
| | - Klaus Osterrieder
- Institut für VirologieRobert von Ostertag‐HausZentrum für InfektionsmedizinFreie Universität BerlinRobert‐von‐Ostertag‐Str. 7‐1314163BerlinGermany
- Department of Infectious Diseases and Public HealthJockey Club College of Veterinary Medicine and Life SciencesCity University of Hong KongKowloon TongHong Kong
| | - Walid Azab
- Institut für VirologieRobert von Ostertag‐HausZentrum für InfektionsmedizinFreie Universität BerlinRobert‐von‐Ostertag‐Str. 7‐1314163BerlinGermany
| | - Rainer Haag
- Institut für Chemie und BiochemieFreie Universität BerlinTakustrasse 314195BerlinGermany
| | - Mohsen Adeli
- Department of ChemistryFaculty of ScienceLorestan UniversityKhorramabadIran
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Sriwilaijaroen N, Suzuki Y. Sialoglycovirology of Lectins: Sialyl Glycan Binding of Enveloped and Non-enveloped Viruses. Methods Mol Biol 2020; 2132:483-545. [PMID: 32306355 PMCID: PMC7165297 DOI: 10.1007/978-1-0716-0430-4_47] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/24/2023]
Abstract
On the cell sur "face", sialoglycoconjugates act as receptionists that have an important role in the first step of various cellular processes that bridge communication between the cell and its environment. Loss of Sia production can cause the developmental of defects and lethality in most animals; hence, animal cells are less prone to evolution of resistance to interactions by rapidly evolved Sia-binding viruses. Obligative intracellular viruses mostly have rapid evolution that allows escape from host immunity, leading to an epidemic variant, and that allows emergence of a novel strain, occasionally leading to pandemics that cause health-social-economic problems. Recently, much attention has been given to the mutual recognition systems via sialosugar chains between viruses and their host cells and there has been rapid growth of the research field "sialoglycovirology." In this chapter, the structural diversity of sialoglycoconjugates is overviewed, and enveloped and non-enveloped viruses that bind to Sia are reviewed. Also, interactions of viral lectins-host Sia receptors, which determine viral transmission, host range, and pathogenesis, are presented. The future direction of new therapeutic routes targeting viral lectins, development of easy-to-use detection methods for diagnosis and monitoring changes in virus binding specificity, and challenges in the development of suitable viruses to use in virus-based therapies for genetic disorders and cancer are discussed.
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Affiliation(s)
- Nongluk Sriwilaijaroen
- Department of Preclinical Sciences, Faculty of Medicine, Thammasat University, Pathumthani, Thailand
- College of Life and Health Sciences, Chubu University, Kasugai, Aichi, Japan
| | - Yasuo Suzuki
- College of Life and Health Sciences, Chubu University, Kasugai, Aichi, Japan.
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Equine Rhinitis A Virus Mutants with Altered Acid Resistance Unveil a Key Role of VP3 and Intrasubunit Interactions in the Control of the pH Stability of the Aphthovirus Capsid. J Virol 2016; 90:9725-9732. [PMID: 27535044 DOI: 10.1128/jvi.01043-16] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/27/2016] [Accepted: 08/08/2016] [Indexed: 12/12/2022] Open
Abstract
Equine rhinitis A virus (ERAV) is a picornavirus associated with respiratory disease in horses and is genetically closely related to foot-and-mouth disease virus (FMDV), the prototype aphthovirus. ERAV has recently gained interest as an FMDV alternative for the study of aphthovirus biology, including cell entry and uncoating or antiviral testing. As described for FMDV, current data support that acidic pH inside cellular endosomes triggers ERAV uncoating. In order to provide further insights into aphthovirus uncoating mechanism, we have isolated a panel of ERAV mutants with altered acid sensitivity and that differed on their degree of sensitivity to the inhibition of endosome acidification. These results provide functional evidence of the involvement of acidic pH on ERAV uncoating within endosomes. Remarkably, all amino acid substitutions found in acid-labile or acid-resistant ERAVs were located in the capsid protein VP3, indicating that this protein plays a pivotal role for the control of pH stability of the ERAV capsid. Moreover, all amino acid substitutions mapped at the intraprotomer interface between VP3 and VP2 or between VP3 and the N terminus of VP1. These results expand our knowledge on the regions that regulate the acid stability of aphthovirus capsid and should be taken into account when using ERAV as a surrogate of FMDV. IMPORTANCE The viral capsid constitutes a sort of dynamic nanomachine that protects the viral genome against environmental assaults while accomplishing important functions such as receptor attachment for viral entry or genome release. We have explored the molecular determinants of aphthovirus capsid stability by isolating and characterizing a panel of equine rhinitis A virus mutants that differed on their acid sensitivity. All the mutations were located within a specific region of the capsid, the intraprotomer interface among capsid proteins, thus providing new insights into the regions that control the acid stability of aphthovirus capsid. These findings could positively contribute to the development of antiviral approaches targeting aphthovirus uncoating or the refinement of vaccine strategies based on capsid stabilization.
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Rai DK, Lawrence P, Pauszek SJ, Piccone ME, Knowles NJ, Rieder E. Bioinformatics and Molecular Analysis of the Evolutionary Relationship between Bovine Rhinitis A Viruses and Foot-And-Mouth Disease Virus. Bioinform Biol Insights 2015; 9:43-58. [PMID: 27081310 PMCID: PMC4822724 DOI: 10.4137/bbi.s37223] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/03/2015] [Revised: 12/21/2015] [Accepted: 12/26/2015] [Indexed: 11/25/2022] Open
Abstract
Bovine rhinitis viruses (BRVs) cause mild respiratory disease of cattle. In this study, a near full-length genome sequence of a virus named RS3X (formerly classified as bovine rhinovirus type 1), isolated from infected cattle from the UK in the 1960s, was obtained and analyzed. Compared to other closely related Aphthoviruses, major differences were detected in the leader protease (Lpro), P1, 2B, and 3A proteins. Phylogenetic analysis revealed that RS3X was a member of the species bovine rhinitis A virus (BRAV). Using different codon-based and branch-site selection models for Aphthoviruses, including BRAV RS3X and foot-and-mouth disease virus, we observed no clear evidence for genomic regions undergoing positive selection. However, within each of the BRV species, multiple sites under positive selection were detected. The results also suggest that the probability (determined by Recombination Detection Program) for recombination events between BRVs and other Aphthoviruses, including foot-and-mouth disease virus was not significant. In contrast, within BRVs, the probability of recombination increases. The data reported here provide genetic information to assist in the identification of diagnostic signatures and research tools for BRAV.
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Affiliation(s)
- Devendra K Rai
- Agricultural Research Service, US Department of Agriculture, Plum Island Animal Disease Center, Greenport, NY, USA.; Department of Pathobiology and Veterinary Science, University of Connecticut, Storrs, CT, USA
| | - Paul Lawrence
- Agricultural Research Service, US Department of Agriculture, Plum Island Animal Disease Center, Greenport, NY, USA
| | - Steve J Pauszek
- Agricultural Research Service, US Department of Agriculture, Plum Island Animal Disease Center, Greenport, NY, USA
| | - Maria E Piccone
- Agricultural Research Service, US Department of Agriculture, Plum Island Animal Disease Center, Greenport, NY, USA
| | - Nick J Knowles
- The Pirbright Institute, Ash Road, Pirbright, Woking, Surrey, UK
| | - Elizabeth Rieder
- Agricultural Research Service, US Department of Agriculture, Plum Island Animal Disease Center, Greenport, NY, USA
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Lou Z, Sun Y, Rao Z. Current progress in antiviral strategies. Trends Pharmacol Sci 2014; 35:86-102. [PMID: 24439476 PMCID: PMC7112804 DOI: 10.1016/j.tips.2013.11.006] [Citation(s) in RCA: 169] [Impact Index Per Article: 15.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/16/2013] [Revised: 11/23/2013] [Accepted: 11/26/2013] [Indexed: 02/07/2023]
Abstract
Antiviral agents function as either viral targets or host factors. Virus-targeting antivirals (VTAs) function through a direct (DVTAs) or an indirect (InDVTAs) method in the viral life cycle. Host-targeting antivirals (HTAs) include reagents that target the host proteins that are involved in the viral life cycle.
The prevalence of chronic viral infectious diseases, such as human immunodeficiency virus (HIV), hepatitis C virus (HCV), and influenza virus; the emergence and re-emergence of new viral infections, such as picornaviruses and coronaviruses; and, particularly, resistance to currently used antiviral drugs have led to increased demand for new antiviral strategies and reagents. Increased understanding of the molecular mechanisms of viral infection has provided great potential for the discovery of new antiviral agents that target viral proteins or host factors. Virus-targeting antivirals can function directly or indirectly to inhibit the biological functions of viral proteins, mostly enzymatic activities, or to block viral replication machinery. Host-targeting antivirals target the host proteins that are involved in the viral life cycle, regulating the function of the immune system or other cellular processes in host cells. Here we review key targets and considerations for the development of both antiviral strategies.
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Affiliation(s)
- Zhiyong Lou
- Laboratory of Structural Biology and MOE Laboratory of Protein Science, School of Medicine, Tsinghua University, Beijing, 100084, China.
| | - Yuna Sun
- National Laboratory of Macromolecules, Institute of Biophysics, Chinese Academy of Science, Beijing, 100101, China
| | - Zihe Rao
- Laboratory of Structural Biology and MOE Laboratory of Protein Science, School of Medicine, Tsinghua University, Beijing, 100084, China; National Laboratory of Macromolecules, Institute of Biophysics, Chinese Academy of Science, Beijing, 100101, China.
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7
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Fujimoto Z, Tateno H, Hirabayashi J. Lectin structures: classification based on the 3-D structures. Methods Mol Biol 2014; 1200:579-606. [PMID: 25117265 DOI: 10.1007/978-1-4939-1292-6_46] [Citation(s) in RCA: 35] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/04/2022]
Abstract
Recent progress in structural biology has elucidated the three-dimensional structures and carbohydrate-binding mechanisms of most lectin families. Lectins are classified into 48 families based on their three-dimensional structures. A ribbon drawing gallery of the crystal and solution structures of representative lectins or lectin-like proteins is appended and may help to convey the diversity of lectin families, the similarity and differences between lectin families, as well as the carbohydrate-binding architectures of lectins.
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Affiliation(s)
- Zui Fujimoto
- Biomolecular Research Unit, National Institute of Agrobiological Sciences, 2-1-2 Kannondai, Tsukuba, 305-8602, Japan,
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Horsington J, Lynch SE, Gilkerson JR, Studdert MJ, Hartley CA. Equine picornaviruses: Well known but poorly understood. Vet Microbiol 2013; 167:78-85. [DOI: 10.1016/j.vetmic.2013.05.012] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/18/2012] [Revised: 05/29/2013] [Accepted: 05/31/2013] [Indexed: 11/16/2022]
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Lynch SE, Gilkerson JR, Symes SJ, Huang JA, Hartley CA. Persistence and chronic urinary shedding of the aphthovirus equine rhinitis A virus. Comp Immunol Microbiol Infect Dis 2013. [DOI: 10.1016/j.cimid.2012.10.003] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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10
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Identification of the galactose binding domain of the adeno-associated virus serotype 9 capsid. J Virol 2012; 86:7326-33. [PMID: 22514350 DOI: 10.1128/jvi.00448-12] [Citation(s) in RCA: 99] [Impact Index Per Article: 7.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/17/2023] Open
Abstract
Adeno-associated virus serotype 9 (AAV9) vectors show promise for gene therapy of a variety of diseases due to their ability to transduce multiple tissues, including heart, skeletal muscle, and the alveolar epithelium of the lung. In addition, AAV9 is unique compared to other AAV serotypes in that it is capable of surpassing the blood-brain barrier and transducing neurons in the brain and spinal cord. It has recently been shown that AAV9 uses galactose as a receptor to transduce many different cell types in vitro, as well as cells of the mouse airway in vivo. In this study, we sought to identify the specific amino acids of the AAV9 capsid necessary for binding to galactose. By site-directed mutagenesis and cell binding assays, plus computational ligand docking studies, we discovered five amino acids, including N470, D271, N272, Y446, and W503, which are required for galactose binding that form a pocket at the base of the protrusions around the icosahedral 3-fold axes of symmetry. The importance of these amino acids for tissue tropism was also confirmed by in vivo studies in the mouse lung. Identifying the interactions necessary for AAV9 binding to galactose may lead to advances in vector engineering.
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Structural analysis of coxsackievirus A7 reveals conformational changes associated with uncoating. J Virol 2012; 86:7207-15. [PMID: 22514349 DOI: 10.1128/jvi.06425-11] [Citation(s) in RCA: 36] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/28/2023] Open
Abstract
Coxsackievirus A7 (CAV7) is a rarely detected and poorly characterized serotype of the Enterovirus species Human enterovirus A (HEV-A) within the Picornaviridae family. The CAV7-USSR strain has caused polio-like epidemics and was originally thought to represent the fourth poliovirus type, but later evidence linked this strain to the CAV7-Parker prototype. Another isolate, CAV7-275/58, was also serologically similar to Parker but was noninfectious in a mouse model. Sequencing of the genomic region encoding the capsid proteins of the USSR and 275/58 strains and subsequent comparison with the corresponding amino acid sequences of the Parker strain revealed that the Parker and USSR strains are nearly identical, while the 275/58 strain is more distant. Using electron cryomicroscopy and three-dimensional image reconstruction, the structures of the CAV7-USSR virion and empty capsid were resolved to 8.2-Å and 6.1-Å resolutions, respectively. This is one of the first detailed structural analyses of the HEV-A species. Using homology modeling, reconstruction segmentation, and flexible fitting, we constructed a pseudoatomic T = 1 (pseudo T = 3) model incorporating the three major capsid proteins (VP1 to VP3), addressed the conformational changes of the capsid and its constituent viral proteins occurring during RNA release, and mapped the capsid proteins' variable regions to the structure. During uncoating, VP4 and RNA are released analogously to poliovirus 1, the interfaces of VP2 and VP3 are rearranged, and VP1 rotates. Variable regions in the capsid proteins were predicted to map mainly to the surface of VP1 and are thus likely to affect the tropism and pathogenicity of CAV7.
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Reiter DM, Frierson JM, Halvorson EE, Kobayashi T, Dermody TS, Stehle T. Crystal structure of reovirus attachment protein σ1 in complex with sialylated oligosaccharides. PLoS Pathog 2011; 7:e1002166. [PMID: 21829363 PMCID: PMC3150272 DOI: 10.1371/journal.ppat.1002166] [Citation(s) in RCA: 108] [Impact Index Per Article: 7.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/09/2011] [Accepted: 05/31/2011] [Indexed: 11/19/2022] Open
Abstract
Many viruses attach to target cells by binding to cell-surface glycans. To gain a better understanding of strategies used by viruses to engage carbohydrate receptors, we determined the crystal structures of reovirus attachment protein σ1 in complex with α-2,3-sialyllactose, α-2,6-sialyllactose, and α-2,8-di-siallylactose. All three oligosaccharides terminate in sialic acid, which serves as a receptor for the reovirus serotype studied here. The overall structure of σ1 resembles an elongated, filamentous trimer. It contains a globular head featuring a compact β-barrel, and a fibrous extension formed by seven repeating units of a triple β-spiral that is interrupted near its midpoint by a short α-helical coiled coil. The carbohydrate-binding site is located between β-spiral repeats two and three, distal from the head. In all three complexes, the terminal sialic acid forms almost all of the contacts with σ1 in an identical manner, while the remaining components of the oligosaccharides make little or no contacts. We used this structural information to guide mutagenesis studies to identify residues in σ1 that functionally engage sialic acid by assessing hemagglutination capacity and growth in murine erythroleukemia cells, which require sialic acid binding for productive infection. Our studies using σ1 mutant viruses reveal that residues 198, 202, 203, 204, and 205 are required for functional binding to sialic acid by reovirus. These findings provide insight into mechanisms of reovirus attachment to cell-surface glycans and contribute to an understanding of carbohydrate binding by viruses. They also establish a filamentous, trimeric carbohydrate-binding module that could potentially be used to endow other trimeric proteins with carbohydrate-binding properties.
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Affiliation(s)
- Dirk M. Reiter
- Interfaculty Institute of Biochemistry, University of Tuebingen, Tuebingen, Germany
| | - Johnna M. Frierson
- Departments of Pathology, Microbiology, and Immunology, Vanderbilt University School of Medicine, Nashville, Tennessee, United States of America
- Elizabeth B. Lamb Center for Pediatric Research, Vanderbilt University School of Medicine, Nashville, Tennessee, United States of America
| | - Elizabeth E. Halvorson
- Departments of Pathology, Microbiology, and Immunology, Vanderbilt University School of Medicine, Nashville, Tennessee, United States of America
- Elizabeth B. Lamb Center for Pediatric Research, Vanderbilt University School of Medicine, Nashville, Tennessee, United States of America
| | - Takeshi Kobayashi
- Elizabeth B. Lamb Center for Pediatric Research, Vanderbilt University School of Medicine, Nashville, Tennessee, United States of America
- Department of Pediatrics, Vanderbilt University School of Medicine, Nashville, Tennessee, United States of America
| | - Terence S. Dermody
- Departments of Pathology, Microbiology, and Immunology, Vanderbilt University School of Medicine, Nashville, Tennessee, United States of America
- Elizabeth B. Lamb Center for Pediatric Research, Vanderbilt University School of Medicine, Nashville, Tennessee, United States of America
- Department of Pediatrics, Vanderbilt University School of Medicine, Nashville, Tennessee, United States of America
| | - Thilo Stehle
- Interfaculty Institute of Biochemistry, University of Tuebingen, Tuebingen, Germany
- Department of Pediatrics, Vanderbilt University School of Medicine, Nashville, Tennessee, United States of America
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13
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Lynch SE, Gilkerson JR, Symes SJ, Huang JA, Tatarczuch L, Hartley CA. Equine rhinitis A virus-like particle expressing DNA vaccine induces a virus neutralising immune response in mice. Virus Res 2011; 158:294-7. [PMID: 21539868 DOI: 10.1016/j.virusres.2011.04.009] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/15/2011] [Revised: 04/11/2011] [Accepted: 04/14/2011] [Indexed: 10/18/2022]
Abstract
Equine rhinitis A virus (ERAV) is a respiratory pathogen of horses. Candidate vaccines to date have been hindered by low expression levels and the induction of non-neutralising antibodies. The immunodominant epitope of ERAV is conformational and is located within the quaternary structure of the capsid. This site should be retained in ERAV virus-like particles (VLPs) to stimulate the induction of neutralising antibodies. The immunogenicity of a plasmid-based DNA vaccine designed to express ERAV VLPs was assessed. The plasmid construct, pcD.P12A.3C, contained the capsid precursor (P1-2A) and the viral protease 3C, under the transcriptional control of a cytomegalovirus (CMV) promoter. Mature viral capsid proteins and VLPs were detected in vitro in transfected COS7 cells. Immunisation of BALB/c mice with pcD.P12A.3C induced virus neutralising antibodies and enhanced the virus neutralising antibody response to purified, UV-inactivated ERAV. This study further supports the use of DNA vaccines to elicit neutralising antibodies to complex antigenic proteins.
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Affiliation(s)
- Stacey E Lynch
- Equine Infectious Diseases Laboratory, Department of Veterinary Science, The University of Melbourne, VIC 3010, Australia
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