1
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Elli S, Raffaini G, Guerrini M, Kosakovsky Pond S, Matrosovich M. Molecular modeling and phylogenetic analyses highlight the role of amino acid 347 of the N1 subtype neuraminidase in influenza virus host range and interspecies adaptation. Front Microbiol 2023; 14:1309156. [PMID: 38169695 PMCID: PMC10758481 DOI: 10.3389/fmicb.2023.1309156] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/07/2023] [Accepted: 11/29/2023] [Indexed: 01/05/2024] Open
Abstract
The N1 neuraminidases (NAs) of avian and pandemic human influenza viruses contain tyrosine and asparagine, respectively, at position 347 on the rim of the catalytic site; the biological significance of this difference is not clear. Here, we used molecular dynamics simulation to model the effects of amino acid 347 on N1 NA interactions with sialyllacto-N-tetraoses 6'SLN-LC and 3'SLN-LC, which represent NA substrates in humans and birds, respectively. Our analysis predicted that Y347 plays an important role in the NA preference for the avian-type substrates. The Y347N substitution facilitates hydrolysis of human-type substrates by resolving steric conflicts of the Neu5Ac2-6Gal moiety with the bulky side chain of Y347, decreasing the free energy of substrate binding, and increasing the solvation of the Neu5Ac2-6Gal bond. Y347 was conserved in all N1 NA sequences of avian influenza viruses in the GISAID EpiFlu database with two exceptions. First, the Y347F substitution was present in the NA of a specific H6N1 poultry virus lineage and was associated with the substitutions G228S and/or E190V/L in the receptor-binding site (RBS) of the hemagglutinin (HA). Second, the highly pathogenic avian H5N1 viruses of the Gs/Gd lineage contained sporadic variants with the NA substitutions Y347H/D, which were frequently associated with substitutions in the HA RBS. The Y347N substitution occurred following the introductions of avian precursors into humans and pigs with N/D347 conserved during virus circulation in these hosts. Comparative evolutionary analysis of site 347 revealed episodic positive selection across the entire tree and negative selection within most host-specific groups of viruses, suggesting that substitutions at NA position 347 occurred during host switches and remained under pervasive purifying selection thereafter. Our results elucidate the role of amino acid 347 in NA recognition of sialoglycan substrates and emphasize the significance of substitutions at position 347 as a marker of host range and adaptive evolution of influenza viruses.
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Affiliation(s)
- Stefano Elli
- Istituto di Ricerche Chimiche e Biochimiche ‘G. Ronzoni’, Milan, Italy
| | - Giuseppina Raffaini
- Department of Chemistry, Materials, and Chemical Engineering “Giulio Natta”, Politecnico di Milano, Milan, Italy
| | - Marco Guerrini
- Istituto di Ricerche Chimiche e Biochimiche ‘G. Ronzoni’, Milan, Italy
| | - Sergei Kosakovsky Pond
- Institute for Genomics and Evolutionary Medicine, Temple University, Philadelphia, PA, United States
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2
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Qin HJ, Li S, Zhu YB, Bao YB, Tang Q, Liu WB, Zhong M, Zhao Y, Yang Y. Oseltamivir modified bovine serum albumin inhibits neuraminidase activity and accumulates virion particles to disturb influenza virus replication. Carbohydr Res 2022; 520:108631. [PMID: 35839640 DOI: 10.1016/j.carres.2022.108631] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/21/2022] [Revised: 07/03/2022] [Accepted: 07/05/2022] [Indexed: 11/25/2022]
Abstract
The preparation of oseltamivir-bovine serum albumin conjugate (OS-BSA) for use as a multivalent influenza neuraminidase (NA) inhibitor is reported. Briefly, the oseltamivir azidohexyl ester was synthesized and covalently bound via an orthogonal attachment to bicyclononyne-modified BSA using copper-free click chemistry. Primary antiviral assays on NA protein and cellular levels showed that the synthetic multivalent OS-BSA conjugate was a more effective inhibitor than monomeric OS azidohexyl ester. Further investigation of the antiviral mechanism found that the prepared OS-BSA could not only be used as a multivalent NA inhibitor but also acted as an adsorbent for the aggregation of virion particles, contributing to the inhibition of the influenza viral replication cycle. Our findings provide insight into the antiviral mechanism of multivalent NA inhibitors and form a basis for the development of novel antiviral agents.
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Affiliation(s)
- Hai-Juan Qin
- Research Centre of Modern Analytical Technology, Tianjin University of Science & Technology, No. 29, 13th Avenue, TEDA, Tianjin, 300457, China
| | - Shuang Li
- China International Science and Technology Cooperation Base of Food Nutrition/Safety and Medicinal Chemistry, College of Biotechnology, Tianjin University of Science & Technology, No. 29, 13th Avenue, TEDA, Tianjin, 300457, China
| | - Yu-Bo Zhu
- China International Science and Technology Cooperation Base of Food Nutrition/Safety and Medicinal Chemistry, College of Biotechnology, Tianjin University of Science & Technology, No. 29, 13th Avenue, TEDA, Tianjin, 300457, China
| | - Yan-Bin Bao
- China International Science and Technology Cooperation Base of Food Nutrition/Safety and Medicinal Chemistry, College of Biotechnology, Tianjin University of Science & Technology, No. 29, 13th Avenue, TEDA, Tianjin, 300457, China
| | - Qi Tang
- China International Science and Technology Cooperation Base of Food Nutrition/Safety and Medicinal Chemistry, College of Biotechnology, Tianjin University of Science & Technology, No. 29, 13th Avenue, TEDA, Tianjin, 300457, China
| | - Wen-Bin Liu
- China International Science and Technology Cooperation Base of Food Nutrition/Safety and Medicinal Chemistry, College of Biotechnology, Tianjin University of Science & Technology, No. 29, 13th Avenue, TEDA, Tianjin, 300457, China
| | - Ming Zhong
- Medical College of Shaoguan University, Shaoguan, 512026, Guangdong Province, China.
| | - YueTao Zhao
- School of Life Sciences, Central South University, Changsha, 410013, Hunan Province, China.
| | - Yang Yang
- Research Centre of Modern Analytical Technology, Tianjin University of Science & Technology, No. 29, 13th Avenue, TEDA, Tianjin, 300457, China; China International Science and Technology Cooperation Base of Food Nutrition/Safety and Medicinal Chemistry, College of Biotechnology, Tianjin University of Science & Technology, No. 29, 13th Avenue, TEDA, Tianjin, 300457, China.
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3
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Yu ACY, Volkers G, Jongkees SAK, Worrall LJ, Withers SG, Strynadka NCJ. Crystal structure of the Propionibacterium acnes surface sialidase, a drug target for P. acnes-associated diseases. Glycobiology 2021; 32:162-170. [PMID: 34792586 DOI: 10.1093/glycob/cwab094] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/10/2021] [Revised: 04/28/2021] [Accepted: 05/19/2021] [Indexed: 11/12/2022] Open
Abstract
Propionibacterium acnes, though generally considered part of the normal flora of human skin, is an opportunistic pathogen associated with acne vulgaris as well as other diseases, including endocarditis, endophthalmitis and prosthetic joint infections. Its virulence potential is also supported by knowledge gained from its sequenced genome. Indeed, a vaccine targeting a putative cell wall-anchored P. acnes sialidase has been shown to suppress cytotoxicity and pro-inflammatory cytokine release induced by the organism, and is proposed as an alternative treatment for P. acnes-associated diseases. Here, we report the crystal structures of the surface sialidase and its complex with the transition-state mimic Neu5Ac2en. Our structural and kinetic analyses, together with insight from a glycan array screen, which probes subtle specificities of the sialidase for α-2,3-sialosides, provide a basis for the structure-based design of novel small-molecule therapeutics against P. acnes infections.
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Affiliation(s)
- Angel C Y Yu
- Department of Biochemistry and Molecular Biology, University of British Columbia, 2350 Health Sciences Mall, Vancouver, British Columbia V6T 1Z3, Canada.,Centre for Blood Research, University of British Columbia, Vancouver, British Columbia, 2350 Health Sciences Mall, V6T 1Z3, Canada
| | - Gesa Volkers
- Department of Biochemistry and Molecular Biology, University of British Columbia, 2350 Health Sciences Mall, Vancouver, British Columbia V6T 1Z3, Canada.,Centre for Blood Research, University of British Columbia, Vancouver, British Columbia, 2350 Health Sciences Mall, V6T 1Z3, Canada
| | - Seino A K Jongkees
- Department of Chemistry, University of British Columbia, 2036 Main Mall, Vancouver, British Columbia, V6T 1Z1, Canada
| | - Liam J Worrall
- Department of Biochemistry and Molecular Biology, University of British Columbia, 2350 Health Sciences Mall, Vancouver, British Columbia V6T 1Z3, Canada.,Centre for Blood Research, University of British Columbia, Vancouver, British Columbia, 2350 Health Sciences Mall, V6T 1Z3, Canada
| | - Stephen G Withers
- Department of Biochemistry and Molecular Biology, University of British Columbia, 2350 Health Sciences Mall, Vancouver, British Columbia V6T 1Z3, Canada.,Department of Chemistry, University of British Columbia, 2036 Main Mall, Vancouver, British Columbia, V6T 1Z1, Canada
| | - Natalie C J Strynadka
- Department of Biochemistry and Molecular Biology, University of British Columbia, 2350 Health Sciences Mall, Vancouver, British Columbia V6T 1Z3, Canada.,Centre for Blood Research, University of British Columbia, Vancouver, British Columbia, 2350 Health Sciences Mall, V6T 1Z3, Canada
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4
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Mtambo SE, Amoako DG, Somboro AM, Agoni C, Lawal MM, Gumede NS, Khan RB, Kumalo HM. Influenza Viruses: Harnessing the Crucial Role of the M2 Ion-Channel and Neuraminidase toward Inhibitor Design. Molecules 2021; 26:880. [PMID: 33562349 PMCID: PMC7916051 DOI: 10.3390/molecules26040880] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/01/2021] [Revised: 02/01/2021] [Accepted: 02/01/2021] [Indexed: 12/18/2022] Open
Abstract
As a member of the Orthomyxoviridae family of viruses, influenza viruses (IVs) are known causative agents of respiratory infection in vertebrates. They remain a major global threat responsible for the most virulent diseases and global pandemics in humans. The virulence of IVs and the consequential high morbidity and mortality of IV infections are primarily attributed to the high mutation rates in the IVs' genome coupled with the numerous genomic segments, which give rise to antiviral resistant and vaccine evading strains. Current therapeutic options include vaccines and small molecule inhibitors, which therapeutically target various catalytic processes in IVs. However, the periodic emergence of new IV strains necessitates the continuous development of novel anti-influenza therapeutic options. The crux of this review highlights the recent studies on the biology of influenza viruses, focusing on the structure, function, and mechanism of action of the M2 channel and neuraminidase as therapeutic targets. We further provide an update on the development of new M2 channel and neuraminidase inhibitors as an alternative to existing anti-influenza therapy. We conclude by highlighting therapeutic strategies that could be explored further towards the design of novel anti-influenza inhibitors with the ability to inhibit resistant strains.
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Affiliation(s)
- Sphamadla E. Mtambo
- Drug Research and Innovation Unit, Discipline of Medical Biochemistry, School of Laboratory Medicine and Medical Science, University of KwaZulu-Natal, Durban 4000, South Africa; (S.E.M.); (A.M.S.); (C.A.); (M.M.L.); (N.S.G.); (R.B.K.)
| | - Daniel G. Amoako
- Drug Research and Innovation Unit, Discipline of Medical Biochemistry, School of Laboratory Medicine and Medical Science, University of KwaZulu-Natal, Durban 4000, South Africa; (S.E.M.); (A.M.S.); (C.A.); (M.M.L.); (N.S.G.); (R.B.K.)
- Centre for Respiratory Diseases and Meningitis, National Institute for Communicable Diseases, Johannesburg 2131, South Africa
| | - Anou M. Somboro
- Drug Research and Innovation Unit, Discipline of Medical Biochemistry, School of Laboratory Medicine and Medical Science, University of KwaZulu-Natal, Durban 4000, South Africa; (S.E.M.); (A.M.S.); (C.A.); (M.M.L.); (N.S.G.); (R.B.K.)
- Centre for Respiratory Diseases and Meningitis, National Institute for Communicable Diseases, Johannesburg 2131, South Africa
| | - Clement Agoni
- Drug Research and Innovation Unit, Discipline of Medical Biochemistry, School of Laboratory Medicine and Medical Science, University of KwaZulu-Natal, Durban 4000, South Africa; (S.E.M.); (A.M.S.); (C.A.); (M.M.L.); (N.S.G.); (R.B.K.)
| | - Monsurat M. Lawal
- Drug Research and Innovation Unit, Discipline of Medical Biochemistry, School of Laboratory Medicine and Medical Science, University of KwaZulu-Natal, Durban 4000, South Africa; (S.E.M.); (A.M.S.); (C.A.); (M.M.L.); (N.S.G.); (R.B.K.)
| | - Nelisiwe S. Gumede
- Drug Research and Innovation Unit, Discipline of Medical Biochemistry, School of Laboratory Medicine and Medical Science, University of KwaZulu-Natal, Durban 4000, South Africa; (S.E.M.); (A.M.S.); (C.A.); (M.M.L.); (N.S.G.); (R.B.K.)
| | - Rene B. Khan
- Drug Research and Innovation Unit, Discipline of Medical Biochemistry, School of Laboratory Medicine and Medical Science, University of KwaZulu-Natal, Durban 4000, South Africa; (S.E.M.); (A.M.S.); (C.A.); (M.M.L.); (N.S.G.); (R.B.K.)
| | - Hezekiel M. Kumalo
- Drug Research and Innovation Unit, Discipline of Medical Biochemistry, School of Laboratory Medicine and Medical Science, University of KwaZulu-Natal, Durban 4000, South Africa; (S.E.M.); (A.M.S.); (C.A.); (M.M.L.); (N.S.G.); (R.B.K.)
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5
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Madsen A, Dai YN, McMahon M, Schmitz AJ, Turner JS, Tan J, Lei T, Alsoussi WB, Strohmeier S, Amor M, Mohammed BM, Mudd PA, Simon V, Cox RJ, Fremont DH, Krammer F, Ellebedy AH. Human Antibodies Targeting Influenza B Virus Neuraminidase Active Site Are Broadly Protective. Immunity 2020; 53:852-863.e7. [PMID: 32976769 DOI: 10.1016/j.immuni.2020.08.015] [Citation(s) in RCA: 41] [Impact Index Per Article: 10.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/10/2020] [Revised: 06/01/2020] [Accepted: 08/25/2020] [Indexed: 12/23/2022]
Abstract
Influenza B virus (IBV) infections can cause severe disease in children and the elderly. Commonly used antivirals have lower clinical effectiveness against IBV compared to influenza A viruses (IAV). Neuraminidase (NA), the second major surface protein on the influenza virus, is emerging as a target of broadly protective antibodies that recognize the NA active site of IAVs. However, similarly broadly protective antibodies against IBV NA have not been identified. Here, we isolated and characterized human monoclonal antibodies (mAbs) that target IBV NA from an IBV-infected patient. Two mAbs displayed broad and potent capacity to inhibit IBV NA enzymatic activity, neutralize the virus in vitro, and protect against lethal IBV infection in mice in prophylactic and therapeutic settings. These mAbs inserted long CDR-H3 loops into the NA active site, engaging residues highly conserved among IBV NAs. These mAbs provide a blueprint for the development of improved vaccines and therapeutics against IBVs.
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Affiliation(s)
- Anders Madsen
- Influenza Centre, Department of Clinical Science, University of Bergen, 5021 Bergen, Norway
| | - Ya-Nan Dai
- Department of Pathology and Immunology, Washington University School of Medicine, St. Louis, MO 63110, USA
| | - Meagan McMahon
- Department of Microbiology, Icahn School of Medicine at Mount Sinai, New York, NY 10029, USA
| | - Aaron J Schmitz
- Department of Pathology and Immunology, Washington University School of Medicine, St. Louis, MO 63110, USA
| | - Jackson S Turner
- Department of Pathology and Immunology, Washington University School of Medicine, St. Louis, MO 63110, USA
| | - Jessica Tan
- Department of Microbiology, Icahn School of Medicine at Mount Sinai, New York, NY 10029, USA
| | - Tingting Lei
- Department of Pathology and Immunology, Washington University School of Medicine, St. Louis, MO 63110, USA
| | - Wafaa B Alsoussi
- Department of Pathology and Immunology, Washington University School of Medicine, St. Louis, MO 63110, USA
| | - Shirin Strohmeier
- Department of Microbiology, Icahn School of Medicine at Mount Sinai, New York, NY 10029, USA
| | - Mostafa Amor
- Department of Pathology and Immunology, Washington University School of Medicine, St. Louis, MO 63110, USA
| | - Bassem M Mohammed
- Department of Pathology and Immunology, Washington University School of Medicine, St. Louis, MO 63110, USA
| | - Philip A Mudd
- Division of Emergency Medicine, Department of Internal Medicine, Washington University School of Medicine, St. Louis, MO 63110, USA
| | - Viviana Simon
- Department of Microbiology, Icahn School of Medicine at Mount Sinai, New York, NY 10029, USA
| | - Rebecca J Cox
- Influenza Centre, Department of Clinical Science, University of Bergen, 5021 Bergen, Norway; Department of Microbiology, Haukeland University Hospital, 5021 Bergen, Norway
| | - Daved H Fremont
- Department of Pathology and Immunology, Washington University School of Medicine, St. Louis, MO 63110, USA; Department of Biochemistry & Molecular Biophysics, Washington University School of Medicine, St. Louis, MO 63110, USA; Department of Molecular Microbiology, Washington University School of Medicine, St. Louis, MO 63110, USA; The Andrew M. and Jane M. Bursky Center for Human Immunology & Immunotherapy Programs, Washington University School of Medicine, St. Louis, MO 63110, USA.
| | - Florian Krammer
- Department of Microbiology, Icahn School of Medicine at Mount Sinai, New York, NY 10029, USA.
| | - Ali H Ellebedy
- Department of Pathology and Immunology, Washington University School of Medicine, St. Louis, MO 63110, USA; Department of Molecular Microbiology, Washington University School of Medicine, St. Louis, MO 63110, USA; The Andrew M. and Jane M. Bursky Center for Human Immunology & Immunotherapy Programs, Washington University School of Medicine, St. Louis, MO 63110, USA.
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6
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Mutations in the Neuraminidase-Like Protein of Bat Influenza H18N11 Virus Enhance Virus Replication in Mammalian Cells, Mice, and Ferrets. J Virol 2020; 94:JVI.01416-19. [PMID: 31801857 DOI: 10.1128/jvi.01416-19] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/30/2019] [Accepted: 11/25/2019] [Indexed: 11/20/2022] Open
Abstract
To characterize bat influenza H18N11 virus, we propagated a reverse genetics-generated H18N11 virus in Madin-Darby canine kidney subclone II cells and detected two mammal-adapting mutations in the neuraminidase (NA)-like protein (NA-F144C and NA-T342A, N2 numbering) that increased the virus titers in three mammalian cell lines (i.e., Madin-Darby canine kidney, Madin-Darby canine kidney subclone II, and human lung adenocarcinoma [Calu-3] cells). In mice, wild-type H18N11 virus replicated only in the lungs of the infected animals, whereas the NA-T342A and NA-F144C/T342A mutant viruses were detected in the nasal turbinates, in addition to the lungs. Bat influenza viruses have not been tested for their virulence or organ tropism in ferrets. We detected wild-type and single mutant viruses each possessing NA-F144C or NA-T342A in the nasal turbinates of one or several infected ferrets, respectively. A mutant virus possessing both the NA-F144C and NA-T342A mutations was isolated from both the lung and the trachea, suggesting that it has a broader organ tropism than the wild-type virus. However, none of the H18N11 viruses caused symptoms in mice or ferrets. The NA-F144C/T342A double mutation did not substantially affect virion morphology or the release of virions from cells. Collectively, our data demonstrate that the propagation of bat influenza H18N11 virus in mammalian cells can result in mammal-adapting mutations that may increase the replicative ability and/or organ tropism of the virus; overall, however, these viruses did not replicate to high titers throughout the respiratory tract of mice and ferrets.IMPORTANCE Bats are reservoirs for several severe zoonotic pathogens. The genomes of influenza A viruses of the H17N10 and H18N11 subtypes have been identified in bats, but no live virus has been isolated. The characterization of artificially generated bat influenza H18N11 virus in mammalian cell lines and animal models revealed that this virus can acquire mammal-adapting mutations that may increase its zoonotic potential; however, the wild-type and mutant viruses did not replicate to high titers in all infected animals.
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7
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Rustmeier NH, Strebl M, Stehle T. The Symmetry of Viral Sialic Acid Binding Sites-Implications for Antiviral Strategies. Viruses 2019; 11:v11100947. [PMID: 31615155 PMCID: PMC6832341 DOI: 10.3390/v11100947] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/13/2019] [Revised: 10/02/2019] [Accepted: 10/09/2019] [Indexed: 12/12/2022] Open
Abstract
Virus infections are initiated by the attachment of the viral particle to protein or carbohydrate receptors on the host cell. Sialic acid-bearing glycan structures are prominently displayed at the cell surface, and, consequently, these structures can function as receptors for a large number of diverse viruses. Structural biology research has helped to establish the molecular bases for many virus–sialic acid interactions. Due to the icosahedral 532 point group symmetry that underlies many viral capsids, the receptor binding sites are frequently arranged in a highly symmetric fashion and linked by five-fold, three-fold, or two-fold rotation axes. For the inhibition of viral attachment, one emerging strategy is based on developing multivalent sialic acid-based inhibitors that can simultaneously engage several of these binding sites, thus binding viral capsids with high avidity. In this review, we will evaluate the structures of non-enveloped virus capsid proteins bound to sialylated glycan receptors and discuss the potential of these structures for the development of potent antiviral attachment inhibitors.
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Affiliation(s)
- Nils H Rustmeier
- Interfaculty Institute of Biochemistry, University of Tuebingen, 72076 Tuebingen, Baden-Wuerttemberg, Germany.
| | - Michael Strebl
- Interfaculty Institute of Biochemistry, University of Tuebingen, 72076 Tuebingen, Baden-Wuerttemberg, Germany.
| | - Thilo Stehle
- Interfaculty Institute of Biochemistry, University of Tuebingen, 72076 Tuebingen, Baden-Wuerttemberg, Germany.
- Department of Pediatrics, Vanderbilt University School of Medicine, Nashville, TN 37232, USA.
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8
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Hong BT, Cheng YSE, Cheng TJ, Fang JM. Boronate, trifluoroborate, sulfone, sulfinate and sulfonate congeners of oseltamivir carboxylic acid: Synthesis and anti-influenza activity. Eur J Med Chem 2018; 163:710-721. [PMID: 30576902 DOI: 10.1016/j.ejmech.2018.12.027] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/13/2018] [Revised: 10/25/2018] [Accepted: 12/12/2018] [Indexed: 11/15/2022]
Abstract
Tamiflu readily undergoes endogenous hydrolysis to give oseltamivir carboxylic acid (OC) as the active anti-influenza agent to inhibit the viral neuraminidase (NA). GOC is derived from OC by replacing the 5-amino group with a guanidino group. In this study, OC and GOC congeners with the carboxylic acid bioisosteres of boronic acid, trifluoroborate, sulfone, sulfinic acid, sulfonic acid and sulfonate ester were first synthesized, starting with conversion of OC to a Barton ester, followed by halodecarboxylation to give the iodocyclohexene, which served as a pivotal intermediate for palladium-catalyzed coupling reactions with appropriate diboron and thiol reagents. The enzymatic and cell-based assays indicated that the GOC congeners consistently displayed better NA inhibition and anti-influenza activity than the corresponding OC congeners. The GOC sulfonic acid congener (7a) was the most potent anti-influenza agent, showing EC50 = 2.2 nM against the wild-type H1N1 virus, presumably because the sulfonic acid 7a was more lipophilic than GOC and exerted stronger interactions on the three arginine residues (R118, R292 and R371) in the NA active site. Although the trifluoroborates, sulfones and sulfonate esters did not have acidic proton, they still exhibited appreciable NA inhibitory activity, indicating that the polarized B-F and S→O bonds still made sufficient interactions with the tri-arginine motif.
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Affiliation(s)
- Bei-Tao Hong
- Department of Chemistry, National Taiwan University, Taipei, 106, Taiwan
| | | | - Ting-Jen Cheng
- The Genomics Research Center, Academia Sinica, Taipei, 115, Taiwan
| | - Jim-Min Fang
- Department of Chemistry, National Taiwan University, Taipei, 106, Taiwan; The Genomics Research Center, Academia Sinica, Taipei, 115, Taiwan.
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9
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Abstract
Sialic acids are cytoprotectors, mainly localized on the surface of cell membranes with multiple and outstanding cell biological functions. The history of their structural analysis, occurrence, and functions is fascinating and described in this review. Reports from different researchers on apparently similar substances from a variety of biological materials led to the identification of a 9-carbon monosaccharide, which in 1957 was designated "sialic acid." The most frequently occurring member of the sialic acid family is N-acetylneuraminic acid, followed by N-glycolylneuraminic acid and O-acetylated derivatives, and up to now over about 80 neuraminic acid derivatives have been described. They appeared first in the animal kingdom, ranging from echinoderms up to higher animals, in many microorganisms, and are also expressed in insects, but are absent in higher plants. Sialic acids are masks and ligands and play as such dual roles in biology. Their involvement in immunology and tumor biology, as well as in hereditary diseases, cannot be underestimated. N-Glycolylneuraminic acid is very special, as this sugar cannot be expressed by humans, but is a xenoantigen with pathogenetic potential. Sialidases (neuraminidases), which liberate sialic acids from cellular compounds, had been known from very early on from studies with influenza viruses. Sialyltransferases, which are responsible for the sialylation of glycans and elongation of polysialic acids, are studied because of their significance in development and, for instance, in cancer. As more information about the functions in health and disease is acquired, the use of sialic acids in the treatment of diseases is also envisaged.
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Affiliation(s)
- Roland Schauer
- Biochemisches Institut, Christian-Albrechts-Universität zu Kiel, Kiel, Germany.
| | - Johannis P Kamerling
- Bijvoet Center for Biomolecular Research, Utrecht University, Utrecht, The Netherlands.
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10
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Glycan binding and specificity of viral influenza neuraminidases by classical molecular dynamics and replica exchange molecular dynamics simulations. J Biomol Struct Dyn 2018; 37:3354-3365. [DOI: 10.1080/07391102.2018.1514326] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
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11
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Chuzel L, Ganatra MB, Rapp E, Henrissat B, Taron CH. Functional metagenomics identifies an exosialidase with an inverting catalytic mechanism that defines a new glycoside hydrolase family (GH156). J Biol Chem 2018; 293:18138-18150. [PMID: 30249617 PMCID: PMC6254351 DOI: 10.1074/jbc.ra118.003302] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/06/2018] [Revised: 09/11/2018] [Indexed: 12/24/2022] Open
Abstract
Exosialidases are glycoside hydrolases that remove a single terminal sialic acid residue from oligosaccharides. They are widely distributed in biology, having been found in prokaryotes, eukaryotes, and certain viruses. Most characterized prokaryotic sialidases are from organisms that are pathogenic or commensal with mammals. However, in this study, we used functional metagenomic screening to seek microbial sialidases encoded by environmental DNA isolated from an extreme ecological niche, a thermal spring. Using recombinant expression of potential exosialidase candidates and a fluorogenic sialidase substrate, we discovered an exosialidase having no homology to known sialidases. Phylogenetic analysis indicated that this protein is a member of a small family of bacterial proteins of previously unknown function. Proton NMR revealed that this enzyme functions via an inverting catalytic mechanism, a biochemical property that is distinct from those of known exosialidases. This unique inverting exosialidase defines a new CAZy glycoside hydrolase family we have designated GH156.
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Affiliation(s)
- Léa Chuzel
- From New England Biolabs, Ipswich, Massachusetts 01938,; the Max Planck Institute for Dynamics of Complex Technical Systems, 39106 Magdeburg, Germany
| | | | - Erdmann Rapp
- the Max Planck Institute for Dynamics of Complex Technical Systems, 39106 Magdeburg, Germany,; glyXera GmbH, 39120 Magdeburg, Germany
| | - Bernard Henrissat
- the Architecture et Fonction des Macromolécules Biologiques, CNRS, Aix-Marseille Université, F-13288 Marseille, France,; the Institut National de la Recherche Agronomique (INRA), Unité Sous Contrat (USC) 1408, Architecture et Fonction des Macromolécules Biologiques, 13288 Marseille, France, and; the Department of Biological Sciences, King Abdulaziz University, Jeddah 21589, Saudi Arabia
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12
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Richards MR, Guo T, Hunter CD, Cairo CW. Molecular dynamics simulations of viral neuraminidase inhibitors with the human neuraminidase enzymes: Insights into isoenzyme selectivity. Bioorg Med Chem 2018; 26:5349-5358. [PMID: 29903413 DOI: 10.1016/j.bmc.2018.05.035] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/30/2018] [Revised: 05/17/2018] [Accepted: 05/22/2018] [Indexed: 11/19/2022]
Abstract
Inhibitors of viral neuraminidase enzymes have been previously developed as therapeutics. Humans can express multiple forms of neuraminidase enzymes (NEU1, NEU2, NEU3, NEU4) that share a similar active site and enzymatic mechanism with their viral counterparts. Using a panel of purified human neuraminidase enzymes, we tested the inhibitory activity of 2-deoxy-2,3-dehydro-N-acetylneuraminic acid (DANA), zanamivir, oseltamivir, and peramivir against each of the human isoenzymes. We find that, with the exceptions of DANA and zanamivir, these compounds show generally poor activity against the human neuraminidase enzymes. To provide insight into the interactions of viral inhibitors with human neuraminidases, we conducted molecular dynamics simulations using homology models based on coordinates reported for NEU2. Simulations revealed that an organized water is displaced by zanamivir in binding to NEU2 and NEU3 and confirmed the critical importance of engaging the binding pocket of the C7-C9 glycerol sidechain. Our results suggest that compounds designed to target the human neuraminidases should provide more selective tools for interrogating these enzymes. Furthermore, they emphasize a need for additional structural data to enable structure-based drug design in these systems.
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Affiliation(s)
- Michele R Richards
- Alberta Glycomics Centre and Department of Chemistry, University of Alberta, Edmonton, AB T6G 2G2, Canada
| | - Tianlin Guo
- Alberta Glycomics Centre and Department of Chemistry, University of Alberta, Edmonton, AB T6G 2G2, Canada
| | - Carmanah D Hunter
- Alberta Glycomics Centre and Department of Chemistry, University of Alberta, Edmonton, AB T6G 2G2, Canada
| | - Christopher W Cairo
- Alberta Glycomics Centre and Department of Chemistry, University of Alberta, Edmonton, AB T6G 2G2, Canada.
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13
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Hadházi Á, Pascolutti M, Bailly B, Dyason JC, Borbás A, Thomson RJ, von Itzstein M. A sialosyl sulfonate as a potent inhibitor of influenza virus replication. Org Biomol Chem 2018; 15:5249-5253. [PMID: 28540971 DOI: 10.1039/c7ob00947j] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
Abstract
A new direction for influenza virus sialidase inhibitor development was identified using a sulfonate congener of 2-deoxy-2-β-H N-acetylneuraminic acid. Sialosyl sulfonates can be synthesised efficiently in four steps from N-acetylneuraminic acid via a microwave assisted decarboxylation. The presence of the sulfonate group significantly increases inhibition of influenza virus sialidase and viral infection when compared to the carboxylate congener, and also to the benchmark sialidase inhibitor 2,3-dehydro-2-deoxy-N-acetylneuraminic acid, Neu5Ac2en.
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Affiliation(s)
- Ádám Hadházi
- Institute for Glycomics, Griffith University - Gold Coast Campus, Queensland 4222, Australia.
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14
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Zhao TF, Qin HJ, Yu Y, Yang MB, Chang H, Guo N, He Y, Yang Y, Yu P. Multivalent zanamivir-bovine serum albumin conjugate as a potent influenza neuraminidase inhibitor. J Carbohydr Chem 2017. [DOI: 10.1080/07328303.2017.1390577] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
Affiliation(s)
- Teng-Fei Zhao
- China International Science and Technology Cooperation Base of Food Nutrition/Safety and Medicinal Chemistry, Key Lab of Industrial Fermentation Microbiology of Ministry of Education, College of Biotechnology, Tianjin University of Science and Technology, Tianjin, China
| | - Hai-Juan Qin
- Research Centre of Modern Analytical Technology, Tianjin University of Science and Technology, Tianjin, China
| | - Yao Yu
- China International Science and Technology Cooperation Base of Food Nutrition/Safety and Medicinal Chemistry, Key Lab of Industrial Fermentation Microbiology of Ministry of Education, College of Biotechnology, Tianjin University of Science and Technology, Tianjin, China
| | - Mei-Bing Yang
- China International Science and Technology Cooperation Base of Food Nutrition/Safety and Medicinal Chemistry, Key Lab of Industrial Fermentation Microbiology of Ministry of Education, College of Biotechnology, Tianjin University of Science and Technology, Tianjin, China
| | - Hao Chang
- China International Science and Technology Cooperation Base of Food Nutrition/Safety and Medicinal Chemistry, Key Lab of Industrial Fermentation Microbiology of Ministry of Education, College of Biotechnology, Tianjin University of Science and Technology, Tianjin, China
| | - Na Guo
- China International Science and Technology Cooperation Base of Food Nutrition/Safety and Medicinal Chemistry, Key Lab of Industrial Fermentation Microbiology of Ministry of Education, College of Biotechnology, Tianjin University of Science and Technology, Tianjin, China
| | - Yun He
- Research Center for Molecular Diagnostics and Sequencing, Research Institute of Tsinghua University in Shenzhen, Nanshan District, Shenzhen, China
| | - Yang Yang
- China International Science and Technology Cooperation Base of Food Nutrition/Safety and Medicinal Chemistry, Key Lab of Industrial Fermentation Microbiology of Ministry of Education, College of Biotechnology, Tianjin University of Science and Technology, Tianjin, China
| | - Peng Yu
- China International Science and Technology Cooperation Base of Food Nutrition/Safety and Medicinal Chemistry, Key Lab of Industrial Fermentation Microbiology of Ministry of Education, College of Biotechnology, Tianjin University of Science and Technology, Tianjin, China
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15
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Pulit-Penaloza JA, Simpson N, Yang H, Creager HM, Jones J, Carney P, Belser JA, Yang G, Chang J, Zeng H, Thor S, Jang Y, Killian ML, Jenkins-Moore M, Janas-Martindale A, Dubovi E, Wentworth DE, Stevens J, Tumpey TM, Davis CT, Maines TR. Assessment of Molecular, Antigenic, and Pathological Features of Canine Influenza A(H3N2) Viruses That Emerged in the United States. J Infect Dis 2017; 216:S499-S507. [PMID: 28934454 DOI: 10.1093/infdis/jiw620] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
Background A single subtype of canine influenza virus (CIV), A(H3N8), was circulating in the United States until a new subtype, A(H3N2), was detected in Illinois in spring 2015. Since then, this CIV has caused thousands of infections in dogs in multiple states. Methods In this study, genetic and antigenic properties of the new CIV were evaluated. In addition, structural and glycan array binding features of the recombinant hemagglutinin were determined. Replication kinetics in human airway cells and pathogenesis and transmissibility in animal models were also assessed. Results A(H3N2) CIVs maintained molecular and antigenic features related to low pathogenicity avian influenza A(H3N2) viruses and were distinct from A(H3N8) CIVs. The structural and glycan array binding profile confirmed these findings and revealed avian-like receptor-binding specificity. While replication kinetics in human airway epithelial cells was on par with that of seasonal influenza viruses, mild-to-moderate disease was observed in infected mice and ferrets, and the virus was inefficiently transmitted among cohoused ferrets. Conclusions Further adaptation is needed for A(H3N2) CIVs to present a likely threat to humans. However, the potential for coinfection of dogs and possible reassortment of human and other animal influenza A viruses presents an ongoing risk to public health.
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Affiliation(s)
- Joanna A Pulit-Penaloza
- Influenza Division, National Center for Immunization and Respiratory Diseases, Centers for Disease Control and Prevention, Atlanta, Georgia
| | - Natosha Simpson
- Influenza Division, National Center for Immunization and Respiratory Diseases, Centers for Disease Control and Prevention, Atlanta, Georgia
| | - Hua Yang
- Influenza Division, National Center for Immunization and Respiratory Diseases, Centers for Disease Control and Prevention, Atlanta, Georgia
| | - Hannah M Creager
- Influenza Division, National Center for Immunization and Respiratory Diseases, Centers for Disease Control and Prevention, Atlanta, Georgia
| | - Joyce Jones
- Influenza Division, National Center for Immunization and Respiratory Diseases, Centers for Disease Control and Prevention, Atlanta, Georgia
| | - Paul Carney
- Influenza Division, National Center for Immunization and Respiratory Diseases, Centers for Disease Control and Prevention, Atlanta, Georgia
| | - Jessica A Belser
- Influenza Division, National Center for Immunization and Respiratory Diseases, Centers for Disease Control and Prevention, Atlanta, Georgia
| | - Genyan Yang
- Influenza Division, National Center for Immunization and Respiratory Diseases, Centers for Disease Control and Prevention, Atlanta, Georgia
| | - Jessie Chang
- Influenza Division, National Center for Immunization and Respiratory Diseases, Centers for Disease Control and Prevention, Atlanta, Georgia
| | - Hui Zeng
- Influenza Division, National Center for Immunization and Respiratory Diseases, Centers for Disease Control and Prevention, Atlanta, Georgia
| | - Sharmi Thor
- Influenza Division, National Center for Immunization and Respiratory Diseases, Centers for Disease Control and Prevention, Atlanta, Georgia
| | - Yunho Jang
- Influenza Division, National Center for Immunization and Respiratory Diseases, Centers for Disease Control and Prevention, Atlanta, Georgia
| | - Mary Lea Killian
- Diagnostic Virology Laboratory, National Veterinary Services Laboratories, Animal and Plant Health Inspection Service, US Department of Agriculture, Ames, Iowa
| | - Melinda Jenkins-Moore
- Diagnostic Virology Laboratory, National Veterinary Services Laboratories, Animal and Plant Health Inspection Service, US Department of Agriculture, Ames, Iowa
| | - Alicia Janas-Martindale
- Diagnostic Virology Laboratory, National Veterinary Services Laboratories, Animal and Plant Health Inspection Service, US Department of Agriculture, Ames, Iowa
| | - Edward Dubovi
- Animal Health Diagnostic Center, College of Veterinary Medicine, Cornell University, Ithaca, New York
| | - David E Wentworth
- Influenza Division, National Center for Immunization and Respiratory Diseases, Centers for Disease Control and Prevention, Atlanta, Georgia
| | - James Stevens
- Influenza Division, National Center for Immunization and Respiratory Diseases, Centers for Disease Control and Prevention, Atlanta, Georgia
| | - Terrence M Tumpey
- Influenza Division, National Center for Immunization and Respiratory Diseases, Centers for Disease Control and Prevention, Atlanta, Georgia
| | - C Todd Davis
- Influenza Division, National Center for Immunization and Respiratory Diseases, Centers for Disease Control and Prevention, Atlanta, Georgia
| | - Taronna R Maines
- Influenza Division, National Center for Immunization and Respiratory Diseases, Centers for Disease Control and Prevention, Atlanta, Georgia
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16
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Colombo C, Bennet AJ. Probing Transition State Analogy in Glycoside Hydrolase Catalysis. ADVANCES IN PHYSICAL ORGANIC CHEMISTRY 2017. [DOI: 10.1016/bs.apoc.2017.09.001] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
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Molecular Characterizations of Surface Proteins Hemagglutinin and Neuraminidase from Recent H5Nx Avian Influenza Viruses. J Virol 2016; 90:5770-5784. [PMID: 27053557 DOI: 10.1128/jvi.00180-16] [Citation(s) in RCA: 46] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/27/2016] [Accepted: 04/03/2016] [Indexed: 12/28/2022] Open
Abstract
UNLABELLED During 2014, a subclade 2.3.4.4 highly pathogenic avian influenza (HPAI) A(H5N8) virus caused poultry outbreaks around the world. In late 2014/early 2015, the virus was detected in wild birds in Canada and the United States, and these viruses also gave rise to reassortant progeny, composed of viral RNA segments (vRNAs) from both Eurasian and North American lineages. In particular, viruses were found with N1, N2, and N8 neuraminidase vRNAs, and these are collectively referred to as H5Nx viruses. In the United States, more than 48 million domestic birds have been affected. Here we present a detailed structural and biochemical analysis of the surface antigens of H5N1, H5N2, and H5N8 viruses in addition to those of a recent human H5N6 virus. Our results with recombinant hemagglutinin reveal that these viruses have a strict avian receptor binding preference, while recombinantly expressed neuraminidases are sensitive to FDA-approved and investigational antivirals. Although H5Nx viruses currently pose a low risk to humans, it is important to maintain surveillance of these circulating viruses and to continually assess future changes that may increase their pandemic potential. IMPORTANCE The H5Nx viruses emerging in North America, Europe, and Asia pose a great public health concern. Here we report a molecular and structural study of the major surface proteins of several H5Nx influenza viruses. Our results improve the understanding of these new viruses and provide important information on their receptor preferences and susceptibilities to antivirals, which are central to pandemic risk assessment.
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18
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Yang J, Liu S, Du L, Jiang S. A new role of neuraminidase (NA) in the influenza virus life cycle: implication for developing NA inhibitors with novel mechanism of action. Rev Med Virol 2016; 26:242-50. [PMID: 27061123 PMCID: PMC7169148 DOI: 10.1002/rmv.1879] [Citation(s) in RCA: 40] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/01/2015] [Revised: 02/13/2016] [Accepted: 02/17/2016] [Indexed: 11/17/2022]
Abstract
The entire life cycle of influenza virus involves viral attachment, entry, replication, and release. Previous studies have demonstrated that neuraminidase (NA) is an essential glycoprotein on the surface of influenza virus and that it is responsible for release of progeny virions from the host cell to infect new cells. However, recent studies have also suggested that NA may play other roles in the early stages of the viral life cycle, that is, viral attachment and entry. This review focuses on the new role of NA in the early stages of influenza life cycle and the corresponding development of novel NA inhibitors. Copyright © 2016 John Wiley & Sons, Ltd.
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Affiliation(s)
- Jie Yang
- Key Lab of New Drug Screening of Guangdong Province, School of Pharmaceutical Sciences, Southern Medical University, Guangzhou, China.,Lindsley F. Kimball Research Institute, New York Blood Center, New York, NY, USA
| | - Shuwen Liu
- Key Lab of New Drug Screening of Guangdong Province, School of Pharmaceutical Sciences, Southern Medical University, Guangzhou, China
| | - Lanying Du
- Lindsley F. Kimball Research Institute, New York Blood Center, New York, NY, USA
| | - Shibo Jiang
- Key Lab of Medical Molecular Virology of MOE/MOH, Shanghai Medical College, Fudan University, Shanghai, China.,Lindsley F. Kimball Research Institute, New York Blood Center, New York, NY, USA
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19
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Eweas AF, Abdel-Moneim AS. In-silico structural analysis of the influenza A subtype H7N9 neuraminidase and molecular docking with different neuraminidase inhibitors. Virusdisease 2015; 26:27-32. [PMID: 26436118 DOI: 10.1007/s13337-014-0245-5] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/29/2014] [Accepted: 12/29/2014] [Indexed: 12/01/2022] Open
Abstract
Human infection with H7 influenza subtypes usually resulted in mild disease with a rare mortalities, however, human infection with the avian low pathogenic H7N9 influenza virus resulted in about 38.6 % human fatality. Due to the new cross-species barrier of this virus subtype, there is an urgent need to better understand the susceptibility to commercially available antivirals and their relation to the structural changes of the viral neuraminidase. Neuraminidases derived from 2013 H7N9, H5N1 and H1N1 were subjected to a structural analysis of their catalytic and framework binding sites. The modeling structure of selected neuraminidases from H7N9 and influenza A subtypes were solved and the docking studies with oseltamivir, zanamivir, laninamivir and peramivir were conducted. The active site residues that are responsible for both binding and cleavage of the terminally linked sialic acid receptors were found conserved. Docking studies with oseltamivir, zanamivir, laninamivir and peramivir revealed that the laninamivir and peramivir showed superior energy binding activities in comparison to the commonly used oseltamivir and zanamivir. The results presented in the current study provide data that are useful for the future treatment of different influenza A subtypes including the recently emerged H7N9.
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Affiliation(s)
- Ahmad F Eweas
- Department of Medicinal Chemistry, National Research Center, Dokki, Cairo, Egypt ; Department of Pharmaceutical Chemistry, College of Pharmacy, Taif University, Al-Taif, 21944 Saudi Arabia
| | - Ahmed S Abdel-Moneim
- Virology Department, Faculty of Veterinary Medicine, Beni-Suef University, Beni-Suef, 62511 Egypt ; Department of Microbiology, Virology Division, College of Medicine, Taif University, Al-Taif, 21944 Saudi Arabia
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20
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From neuraminidase inhibitors to conjugates: a step towards better anti-influenza drugs? Future Med Chem 2015; 6:757-74. [PMID: 24941871 DOI: 10.4155/fmc.14.30] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022] Open
Abstract
For the treatment of seasonal flu and possible pandemic infections the development of new anti-influenza drugs that have good bioavailability against a broad spectrum of influenza viruses including the resistant strains is needed. In this review, we summarize previous methods for the structural modification of zanamivir, a potent neuraminidase inhibitor that has rare drug resistance, in order to develop effective anti-influenza drugs. We also report recent research into the design of multivalent zanamivir drugs and bifunctional zanamivir conjugates, some of which have shown better efficacy in animal experiments. As a step towards developing improved antivirals, conjugating anti-influenza drugs with anti-inflammatory agents can improve oral bioavailability and also exert synergistic effect in influenza therapy.
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21
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Yeh HW, Lin TS, Wang HW, Cheng HW, Liu DZ, Liang PH. S-Linked sialyloligosaccharides bearing liposomes and micelles as influenza virus inhibitors. Org Biomol Chem 2015; 13:11518-28. [DOI: 10.1039/c5ob01376c] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
S-Linked sialic glycoconjugates on liposome and micelle surfaces interacted with influenza virus hemagglutinin, interfering with the entry of the virus into the cell.
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Affiliation(s)
- Hsien-Wei Yeh
- School of Pharmacy
- College of Medicine
- National Taiwan University
- Taipei 100
- Taiwan
| | - Tzung-Sheng Lin
- School of Pharmacy
- College of Medicine
- National Taiwan University
- Taipei 100
- Taiwan
| | - Hsiao-Wen Wang
- School of Pharmacy
- College of Medicine
- National Taiwan University
- Taipei 100
- Taiwan
| | - Hou-Wen Cheng
- School of Pharmacy
- College of Medicine
- National Taiwan University
- Taipei 100
- Taiwan
| | - Der-Zen Liu
- Graduate Institute of Biomedical Materials and Tissue Engineering
- College of Oral Medicine
- Taipei Medical University
- Taipei 110
- Taiwan
| | - Pi-Hui Liang
- School of Pharmacy
- College of Medicine
- National Taiwan University
- Taipei 100
- Taiwan
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22
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Structural and functional analysis of surface proteins from an A(H3N8) influenza virus isolated from New England harbor seals. J Virol 2014; 89:2801-12. [PMID: 25540377 DOI: 10.1128/jvi.02723-14] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
UNLABELLED In late 2011, an A(H3N8) influenza virus infection resulted in the deaths of 162 New England harbor seals. Virus sequence analysis and virus receptor binding studies highlighted potential markers responsible for mammalian adaptation and a mixed receptor binding preference (S. J. Anthony, J. A. St Leger, K. Pugliares, H. S. Ip, J. M. Chan, Z. W. Carpenter, I. Navarrete-Macias, M. Sanchez-Leon, J. T. Saliki, J. Pedersen, W. Karesh, P. Daszak, R. Rabadan, T. Rowles, W. I. Lipkin, MBio 3:e00166-00112, 2012, http://dx.doi.org/10.1128/mBio.00166-12). Here, we present a detailed structural and biochemical analysis of the surface antigens of the virus. Results obtained with recombinant proteins for both the hemagglutinin and neuraminidase indicate a true avian receptor binding preference. Although the detection of this virus in new species highlights an increased potential for cross-species transmission, our results indicate that the A(H3N8) virus currently poses a low risk to humans. IMPORTANCE Cross-species transmission of zoonotic influenza viruses increases public health concerns. Here, we report a molecular and structural study of the major surface proteins from an A(H3N8) influenza virus isolated from New England harbor seals. The results improve our understanding of these viruses as they evolve and provide important information to aid ongoing risk assessment analyses as these zoonotic influenza viruses continue to circulate and adapt to new hosts.
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Hong BT, Chen CL, Fang JM, Tsai KC, Wang SY, Huang WI, Cheng YSE, Wong CH. Oseltamivir hydroxamate and acyl sulfonamide derivatives as influenza neuraminidase inhibitors. Bioorg Med Chem 2014; 22:6647-6654. [PMID: 25456388 DOI: 10.1016/j.bmc.2014.10.005] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/11/2014] [Revised: 09/30/2014] [Accepted: 10/05/2014] [Indexed: 11/16/2022]
Abstract
Tamiflu, the ethyl ester form of oseltamivir carboxylic acid (OC), is the first orally available anti-influenza drug for the front-line therapeutic option. In this study, the OC-hydroxamates, OC-sulfonamides and their guanidino congeners (GOC) were synthesized. Among them, an OC-hydroxamate 7d bearing an O-(2-indolyl)propyl substituent showed potent NA inhibition (IC50 = 6.4 nM) and good anti-influenza activity (EC50 = 60.1 nM) against the wild-type H1N1 virus. Two GOC-hydroxamates (9b and 9d) and one GOC-sulfonamide (12a) were active to the tamiflu-resistant H275Y virus (EC50 = 2.3-6.9 μM).
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Affiliation(s)
- Bei-Tao Hong
- Department of Chemistry, National Taiwan University, Taipei 106, Taiwan
| | - Chun-Lin Chen
- Department of Chemistry, National Taiwan University, Taipei 106, Taiwan
| | - Jim-Min Fang
- Department of Chemistry, National Taiwan University, Taipei 106, Taiwan; The Genomics Research Center, Academia Sinica, Taipei 115, Taiwan.
| | - Keng-Chang Tsai
- National Research Institute of Chinese Medicine, Ministry of Health and Welfare, Taipei 112, Taiwan
| | - Shi-Yun Wang
- The Genomics Research Center, Academia Sinica, Taipei 115, Taiwan
| | - Wen-I Huang
- The Genomics Research Center, Academia Sinica, Taipei 115, Taiwan
| | | | - Chi-Huey Wong
- The Genomics Research Center, Academia Sinica, Taipei 115, Taiwan
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24
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YANG ZHIWEI, WU FEI, LIU JUNXING, WANG SHUQIU, YUAN XIAOHUI. SUSCEPTIBILITY OF COMMERCIAL NEURAMINIDASE INHIBITORS AGAINST 2013 A/H7N9 INFLUENZA VIRUS: A DOCKING AND MOLECULAR DYNAMICS STUDY. JOURNAL OF THEORETICAL & COMPUTATIONAL CHEMISTRY 2013. [DOI: 10.1142/s0219633613500697] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
Abstract
The latest influenza A ( H 7 N 9) virus attracted a worldwide attention due to the first report of human infections and the continuing reported cases in China. In this work, homology modeling, docking and molecular dynamics simulations were combined to study the interactions between neuraminidase ( N 9_2013, from novel A/ H 7 N 9 virus) and agents zanamivir, oseltamivir, peramivir. It was found that N 9_2013 protein is structurally close to the template (PDB code: 1F8B), especially the active site. The binding properties of N 9_2013 protein were nearly identical to those of template. As a result, the three available drugs should be still efficacious for the new emerging A ( H 7 N 9) virus. However, the stabilities of docked complexes and binding affinities (Eint) were slightly reduced, in contrast to the corresponding inhibitor-template complexes, with the values of -82.27 (-84.30), -78.84 (-80.28) and -77.52 (-81.94) kcal mol-1, respectively. Besides, R292K mutation might induce the resistance of the novel virus to the commercial inhibitors. Thus, it arouses the need for continuous monitoring of antiviral drug susceptibilities.
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Affiliation(s)
- ZHIWEI YANG
- School of Basic Medical Sciences, Jiamusi University, Jiamusi 154007, P. R. China
| | - FEI WU
- School of Basic Medical Sciences, Jiamusi University, Jiamusi 154007, P. R. China
| | - JUNXING LIU
- School of Basic Medical Sciences, Jiamusi University, Jiamusi 154007, P. R. China
| | - SHUQIU WANG
- School of Basic Medical Sciences, Jiamusi University, Jiamusi 154007, P. R. China
| | - XIAOHUI YUAN
- Institute of Biomedicine, Jinan University, Guangzhou 510632, P. R. China
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Mutation effects of neuraminidases and their docking with ligands: a molecular dynamics and free energy calculation study. J Comput Aided Mol Des 2013; 27:935-50. [DOI: 10.1007/s10822-013-9691-1] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/17/2013] [Accepted: 11/05/2013] [Indexed: 01/15/2023]
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26
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Oliveira IA, Gonçalves AS, Neves JL, von Itzstein M, Todeschini AR. Evidence of ternary complex formation in Trypanosoma cruzi trans-sialidase catalysis. J Biol Chem 2013; 289:423-36. [PMID: 24194520 DOI: 10.1074/jbc.m112.399303] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022] Open
Abstract
Trypanosoma cruzi trans-sialidase (TcTS) is a key target protein for Chagas disease chemotherapy. In this study, we investigated the implications of active site flexibility on the biochemical mechanism of TcTS. Molecular dynamics studies revealed remarkable plasticity in the TcTS catalytic site, demonstrating, for the first time, how donor substrate engagement with the enzyme induces an acceptor binding site in the catalytic pocket that was not previously captured in crystal structures. Furthermore, NMR data showed cooperative binding between donor and acceptor substrates, supporting theoretical results. In summary, our data put forward a coherent dynamic framework to understand how a glycosidase evolved its highly efficient trans-glycosidase activity.
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Affiliation(s)
- Isadora A Oliveira
- From the Laboratório de Glicobiologia Estrutural e Funcional, Instituto de Biofísica Carlos Chagas Filho, Universidade Federal do Rio de Janeiro, Rio de Janeiro RJ 21941-902, Brazil
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Shidmoossavee FS, Watson JN, Bennet AJ. Chemical insight into the emergence of influenza virus strains that are resistant to Relenza. J Am Chem Soc 2013; 135:13254-7. [PMID: 24001125 DOI: 10.1021/ja405916q] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/03/2023]
Abstract
A reagent panel containing ten 4-substituted 4-nitrophenyl α-D-sialosides and a second panel of the corresponding sialic acid glycals were synthesized and used to probe the inhibition mechanism for two neuraminidases, the N2 enzyme from influenza type A virus and the enzyme from Micromonospora viridifaciens. For the viral enzyme the logarithm of the inhibition constant (Ki) correlated with neither the logarithm of the catalytic efficiency (kcat/Km) nor catalytic proficiency (kcat/Km kun). These linear free energy relationship data support the notion that these inhibitors, which include the therapeutic agent Relenza, are not transition state mimics for the enzyme-catalyzed hydrolysis reaction. Moreover, for the influenza enzyme, a correlation (slope, 0.80 ± 0.08) is observed between the logarithms of the inhibition (Ki) and Michaelis (Km) constants. We conclude that the free energy for Relenza binding to the influenza enzyme mimics the enzyme-substrate interactions at the Michaelis complex. Thus, an influenza mutational response to a 4-substituted sialic acid glycal inhibitor can weaken the interactions between the inhibitor and the viral neuraminidase without a concomitant decrease in free energy of binding for the substrate at the enzyme-catalyzed hydrolysis transition state. The current findings make it clear that new structural motifs and/or substitution patterns need to be developed in the search for a bona fide influenza viral neuraminidase transition state analogue inhibitor.
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Affiliation(s)
- Fahimeh S Shidmoossavee
- Department of Chemistry, Simon Fraser University , 8888 University Drive, Burnaby, British Columbia V5A 1S6, Canada
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28
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Yang Z, Yang Y, Wu F, Feng X. Computational investigation of interaction mechanisms between juglone and influenza virus surface glycoproteins. MOLECULAR SIMULATION 2013. [DOI: 10.1080/08927022.2013.769683] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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Influenza neuraminidase operates via a nucleophilic mechanism and can be targeted by covalent inhibitors. Nat Commun 2013; 4:1491. [PMID: 23422659 DOI: 10.1038/ncomms2487] [Citation(s) in RCA: 54] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/27/2012] [Accepted: 01/15/2013] [Indexed: 01/23/2023] Open
Abstract
Development of novel influenza neuraminidase inhibitors is critical for preparedness against influenza outbreaks. Knowledge of the neuraminidase enzymatic mechanism and transition-state analogue, 2-deoxy-2,3-didehydro-N-acetylneuraminic acid, contributed to the development of the first generation anti-neuraminidase drugs, zanamivir and oseltamivir. However, lack of evidence regarding influenza neuraminidase key catalytic residues has limited strategies for novel neuraminidase inhibitor design. Here, we confirm that influenza neuraminidase conserved Tyr406 is the key catalytic residue that may function as a nucleophile; thus, mechanism-based covalent inhibition of influenza neuraminidase was conceived. Crystallographic studies reveal that 2α,3ax-difluoro-N-acetylneuraminic acid forms a covalent bond with influenza neuraminidase Tyr406 and the compound was found to possess potent anti-influenza activity against both influenza A and B viruses. Our results address many unanswered questions about the influenza neuraminidase catalytic mechanism and demonstrate that covalent inhibition of influenza neuraminidase is a promising and novel strategy for the development of next-generation influenza drugs.
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30
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Walvoort MTC, van der Marel GA, Overkleeft HS, Codée JDC. On the reactivity and selectivity of donor glycosides in glycochemistry and glycobiology: trapped covalent intermediates. Chem Sci 2013. [DOI: 10.1039/c2sc21610h] [Citation(s) in RCA: 34] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
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31
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Influenza virus neuraminidases with reduced enzymatic activity that avidly bind sialic Acid receptors. J Virol 2012; 86:13371-83. [PMID: 23015718 DOI: 10.1128/jvi.01426-12] [Citation(s) in RCA: 106] [Impact Index Per Article: 8.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022] Open
Abstract
Influenza virus neuraminidase (NA) cleaves off sialic acid from cellular receptors of hemagglutinin (HA) to enable progeny escape from infected cells. However, NA variants (D151G) of recent human H3N2 viruses have also been reported to bind receptors on red blood cells, but the nature of these receptors and the effect of the mutation on NA activity were not established. Here, we compare the functional and structural properties of a human H3N2 NA from A/Tanzania/205/2010 and its D151G mutant, which supports HA-independent receptor binding. While the wild-type NA efficiently cleaves sialic acid from both α2-6- and α2-3-linked glycans, the mutant exhibits much reduced enzymatic activity toward both types of sialosides. Conversely, while wild-type NA shows no detectable binding to sialosides, the D151G NA exhibits avid binding with broad specificity toward α2-3 sialosides. D151G NA binds the 3' sialyllactosamine (3'-SLN) and 6'-SLN sialosides with equilibrium dissociation constant (K(D)) values of 30.0 μM and 645 μM, respectively, which correspond to much higher affinities than the corresponding affinities (low mM) of HA to these glycans. Crystal structures of wild-type and mutant NAs reveal the structural basis for glycan binding in the active site by exclusively impairing the glycosidic bond hydrolysis step. The general significance of D151 among influenza virus NAs was further explored by introducing the D151G mutation into three N1 NAs and one N2 NA, which all exhibited reduced enzymatic activity and preferential binding to α2-3 sialosides. Since the enzymatic and binding activities of NAs are not routinely assessed, the potential for NA receptor binding to contribute to influenza virus biology may be underappreciated.
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Structural and functional characterization of neuraminidase-like molecule N10 derived from bat influenza A virus. Proc Natl Acad Sci U S A 2012; 109:18897-902. [PMID: 23012237 DOI: 10.1073/pnas.1211037109] [Citation(s) in RCA: 85] [Impact Index Per Article: 7.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022] Open
Abstract
The recent discovery of the unique genome of influenza virus H17N10 in bats raises considerable doubt about the origin and evolution of influenza A viruses. It also identifies a neuraminidase (NA)-like protein, N10, that is highly divergent from the nine other well-established serotypes of influenza A NA (N1-N9). The structural elucidation and functional characterization of influenza NAs have illustrated the complexity of NA structures, thus raising a key question as to whether N10 has a special structure and function. Here the crystal structure of N10, derived from influenza virus A/little yellow-shouldered bat/Guatemala/153/2009 (H17N10), was solved at a resolution of 2.20 Å. Overall, the structure of N10 was found to be similar to that of the other known influenza NA structures. In vitro enzymatic assays demonstrated that N10 lacks canonical NA activity. A detailed structural analysis revealed dramatic alterations of the conserved active site residues that are unfavorable for the binding and cleavage of terminally linked sialic acid receptors. Furthermore, an unusual 150-loop (residues 147-152) was observed to participate in the intermolecular polar interactions between adjacent N10 molecules of the N10 tetramer. Our study of influenza N10 provides insight into the structure and function of the sialidase superfamily and sheds light on the molecular mechanism of bat influenza virus infection.
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Crystal structures of two subtype N10 neuraminidase-like proteins from bat influenza A viruses reveal a diverged putative active site. Proc Natl Acad Sci U S A 2012; 109:18903-8. [PMID: 23012478 DOI: 10.1073/pnas.1212579109] [Citation(s) in RCA: 95] [Impact Index Per Article: 7.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022] Open
Abstract
Recently, we reported a unique influenza A virus subtype H17N10 from little yellow-shouldered bats. Its neuraminidase (NA) gene encodes a protein that appears to be highly divergent from all known influenza NAs and was assigned as a new subtype N10. To provide structural and functional insights on the bat H17N10 virus, X-ray structures were determined for N10 NA proteins from influenza A viruses A/little yellow-shouldered bat/Guatemala/164/2009 (GU09-164) in two crystal forms at 1.95 Å and 2.5 Å resolution and A/little yellow-shouldered bat/Guatemala/060/2010 (GU10-060) at 2.0 Å. The overall N10 structures are similar to each other and to other known influenza NA structures, with a single highly conserved calcium binding site in each monomer. However, the region corresponding to the highly conserved active site of influenza A N1-N9 NA subtypes and influenza B NA differs substantially. In particular, most of the amino acid residues required for NA activity are substituted, and the putative active site is much wider because of displacement of the 150-loop and 430-loop. These structural features and the fact that the recombinant N10 protein exhibits no, or extremely low, NA activity suggest that it may have a different function than the NA proteins of other influenza viruses. Accordingly, we propose that the N10 protein be termed an NA-like protein until its function is elucidated.
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34
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Liu KC, Fang JM, Jan JT, Cheng TJR, Wang SY, Yang ST, Cheng YSE, Wong CH. Enhanced anti-influenza agents conjugated with anti-inflammatory activity. J Med Chem 2012; 55:8493-501. [PMID: 22963087 DOI: 10.1021/jm3009844] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Abstract
Influenza therapy with a single targeted compound is often limited in efficacy due to the rapidly developed drug resistance. Moreover, the uncontrolled virus-induced cytokines could cause the high mortality of human infected by H5N1 avian influenza virus. In this study, we explored the novel dual-targeted bifunctional anti-influenza drugs formed by conjugation with anti-inflammatory agents. In particular, the caffeic acid (CA)-bearing zanamivir (ZA) conjugates ZA-7-CA (1) and ZA-7-CA-amide (7) showed simultaneous inhibition of influenza virus neuraminidase and suppression of pro-inflammatory cytokines. These ZA conjugates provided remarkable protection of cells and mice against influenza infections. Intranasal administration of low dosage (<1.2 μmol/kg/day) of ZA conjugates exhibited much greater effect than the combination therapy with ZA and the anti-inflammatory agents in protection of the lethally infected mice by H1N1 or H5N1 influenza viruses.
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Affiliation(s)
- Kung-Cheng Liu
- Department of Chemistry, National Taiwan University, Taipei 106, Taiwan
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35
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Abstract
Influenza neuraminidase is the target of two licensed antivirals that have been very successful, with several more in development. However, neuraminidase has been largely ignored as a vaccine target despite evidence that inclusion of neuraminidase in the subunit vaccine gives increased protection. This article describes current knowledge on the structure, enzyme activity, and antigenic significance of neuraminidase.
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Affiliation(s)
- Gillian M Air
- Department of Biochemistry and Molecular Biology, University of Oklahoma Health Sciences Center, Oklahoma City, OK 73104, USA.
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36
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Chan J, Lewis AR, Indurugalla D, Schur M, Wakarchuk W, Bennet AJ. Transition State Analysis of Vibrio cholerae Sialidase-Catalyzed Hydrolyses of Natural Substrate Analogues. J Am Chem Soc 2012; 134:3748-57. [DOI: 10.1021/ja208564y] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/03/2023]
Affiliation(s)
- Jefferson Chan
- Department of Chemistry, Simon Fraser University, 8888 University Drive, Burnaby,
British Columbia, V5A 1S6, Canada
| | - Andrew R. Lewis
- Department of Chemistry, Simon Fraser University, 8888 University Drive, Burnaby,
British Columbia, V5A 1S6, Canada
| | - Deepani Indurugalla
- Department of Chemistry, Simon Fraser University, 8888 University Drive, Burnaby,
British Columbia, V5A 1S6, Canada
| | - Melissa Schur
- Institute for Biological Sciences, National Research Council Canada, Ottawa, Ontario,
Canada
| | - Warren Wakarchuk
- Institute for Biological Sciences, National Research Council Canada, Ottawa, Ontario,
Canada
| | - Andrew J. Bennet
- Department of Chemistry, Simon Fraser University, 8888 University Drive, Burnaby,
British Columbia, V5A 1S6, Canada
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37
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Grienke U, Schmidtke M, von Grafenstein S, Kirchmair J, Liedl KR, Rollinger JM. Influenza neuraminidase: A druggable target for natural products. Nat Prod Rep 2012; 29:11-36. [DOI: 10.1039/c1np00053e] [Citation(s) in RCA: 116] [Impact Index Per Article: 9.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
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Chan J, Watson JN, Lu A, Cerda VC, Borgford TJ, Bennet AJ. Bacterial and Viral Sialidases: Contribution of the Conserved Active Site Glutamate to Catalysis. Biochemistry 2011; 51:433-41. [DOI: 10.1021/bi201019n] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Jefferson Chan
- Department of Chemistry, Simon Fraser University, 8888 University Drive, Burnaby, British
Columbia V5A 1S6, Canada
| | - Jacqueline N. Watson
- Department of Chemistry, Simon Fraser University, 8888 University Drive, Burnaby, British
Columbia V5A 1S6, Canada
| | - April Lu
- Department of Chemistry, Simon Fraser University, 8888 University Drive, Burnaby, British
Columbia V5A 1S6, Canada
| | - Viviana C. Cerda
- Department of Molecular Biology and Biochemistry, Simon Fraser University, 8888 University Drive, Burnaby, British
Columbia V5A 1S6, Canada
| | - Thor J. Borgford
- Department of Chemistry, Simon Fraser University, 8888 University Drive, Burnaby, British
Columbia V5A 1S6, Canada
| | - Andrew J. Bennet
- Department of Chemistry, Simon Fraser University, 8888 University Drive, Burnaby, British
Columbia V5A 1S6, Canada
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39
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Chavan S, Bhayye S, Sobhia ME. Molecular dynamics directed CoMFA studies on carbocyclic neuraminidase inhibitors. Mol Divers 2011; 15:979-87. [PMID: 21922291 DOI: 10.1007/s11030-011-9332-3] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/28/2011] [Accepted: 08/30/2011] [Indexed: 11/28/2022]
Abstract
Zanamivir is the known potent anti-influenza agent targeting the key enzyme neuraminidase that cleaves sialic acid from cell receptors allowing release of newly formed virions. Molecular dynamics simulation was carried out to determine the dynamic behavior of Zanamivir upon its binding to flexible loops of neuraminidase and to analyse its interactions in the bioactive state. Neuraminidase exhibits wide range of affinity with structurally similar compounds. CoMFA study was used to determine quantitative structure-activity relationship for 36 carbocyclic Neuraminidase inhibitors (NIs). The CoMFA model was also successfully built using cross-validated r²cv = 0.580 and r²pred = 0.638.
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Affiliation(s)
- Swapnil Chavan
- Department of Pharmacoinformatics, National Institute of Pharmaceutical Education and Research, Sector 67, SAS Nagar, Punjab 160062, India
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40
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Barrett S, Mohr PG, Schmidt PM, McKimm-Breschkin JL. Real time enzyme inhibition assays provide insights into differences in binding of neuraminidase inhibitors to wild type and mutant influenza viruses. PLoS One 2011; 6:e23627. [PMID: 21858186 PMCID: PMC3157426 DOI: 10.1371/journal.pone.0023627] [Citation(s) in RCA: 35] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/11/2011] [Accepted: 07/21/2011] [Indexed: 01/14/2023] Open
Abstract
The influenza neuraminidase (NA) inhibitors zanamivir, oseltamivir and peramivir were all designed based on the knowledge that the transition state analogue of the cleaved sialic acid, 2-deoxy,2,3-dehydro N-acetyl neuraminic acid (DANA) was a weak inhibitor of NA. While DANA bound rapidly to the NA, modifications leading to the improved potency of these new inhibitors also conferred a time dependent or slow binding phenotype. Many mutations in the NA leading to decreased susceptibility result in loss of slow binding, hence this is a phenotypic marker of many but not all resistant NAs. We present here a simplified approach to determine whether an inhibitor is fast or slow binding by extending the endpoint fluorescent enzyme inhibition assay to a real time assay and monitoring the changes in IC(50)s with time. We carried out two reactions, one with a 30 min preincubation with inhibitor and the second without. The enzymatic reaction was started via addition of substrate and IC(50)s were calculated after each 10 min interval up to 60 min. Results showed that without preincubation IC(50)s for the wild type viruses started high and although they decreased continuously over the 60 min reaction time the final IC(50)s remained higher than for pre-incubated samples. These results indicate a slow equilibrium of association and dissociation and are consistent with slow binding of the inhibitors. In contrast, for viruses with decreased susceptibility, preincubation had minimal effect on the IC(50)s, consistent with fast binding. Therefore this modified assay provides additional phenotypic information about the rate of inhibitor binding in addition to the IC(50), and critically demonstrates the differential effect of incubation times on the IC(50) and K(i) values of wild type and mutant viruses for each of the inhibitors.
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MESH Headings
- Acids, Carbocyclic
- Binding, Competitive
- Cyclopentanes/metabolism
- Cyclopentanes/pharmacology
- Enzyme Assays/methods
- Enzyme Inhibitors/metabolism
- Enzyme Inhibitors/pharmacology
- Guanidines/metabolism
- Guanidines/pharmacology
- Humans
- Influenza A Virus, H1N1 Subtype/drug effects
- Influenza A Virus, H1N1 Subtype/enzymology
- Influenza A Virus, H1N1 Subtype/genetics
- Influenza A Virus, H3N2 Subtype/drug effects
- Influenza A Virus, H3N2 Subtype/enzymology
- Influenza A Virus, H3N2 Subtype/genetics
- Influenza A Virus, H5N1 Subtype/drug effects
- Influenza A Virus, H5N1 Subtype/enzymology
- Influenza A Virus, H5N1 Subtype/genetics
- Inhibitory Concentration 50
- Kinetics
- Mutation
- N-Acetylneuraminic Acid/analogs & derivatives
- N-Acetylneuraminic Acid/metabolism
- N-Acetylneuraminic Acid/pharmacology
- Neuraminidase/antagonists & inhibitors
- Neuraminidase/metabolism
- Orthomyxoviridae/drug effects
- Orthomyxoviridae/enzymology
- Orthomyxoviridae/genetics
- Oseltamivir/metabolism
- Oseltamivir/pharmacology
- Protein Binding
- Substrate Specificity
- Time Factors
- Viral Proteins/antagonists & inhibitors
- Viral Proteins/metabolism
- Zanamivir/metabolism
- Zanamivir/pharmacology
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Affiliation(s)
- Susan Barrett
- CSIRO Materials Science and Engineering, Parkville, Australia
| | - Peter G. Mohr
- CSIRO Australian Animal Health Laboratory, Geelong, Australia
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Combinatorial effect of two framework mutations (E119V and I222L) in the neuraminidase active site of H3N2 influenza virus on resistance to oseltamivir. Antimicrob Agents Chemother 2011; 55:2942-52. [PMID: 21422222 DOI: 10.1128/aac.01699-10] [Citation(s) in RCA: 33] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
Neuraminidase (NA) inhibitors (NIs) are the first line of defense against influenza virus. Reverse genetics experiments allow the study of resistance mechanisms by anticipating the impacts of mutations to the virus. To look at the possibility of an increased effect on the resistance phenotype of a combination of framework mutations, known to confer resistance to oseltamivir or zanamivir, with limited effect on virus fitness, we constructed 4 viruses by reverse genetics in the A/Moscow/10/99 H3N2 background containing double mutations in their neuraminidase genes: E119D+I222L, E119V+I222L, D198N+I222L, and H274Y+I222L (N2 numbering). Among the viruses produced, the E119D+I222L mutant virus was not able to grow without bacterial NA complementation and the D198N+I222L mutant and H274Y+I222L mutant were not stable after passages in MDCK cells. The E119V+I222L mutant was stable after five passages in MDCK cells. This E119V-and-I222L combination had a combinatorial effect on oseltamivir resistance. The total NA activity of the E119V+I222L mutant was low (5% compared to that of the wild-type virus). This drop in NA activity resulted from a decreased NA quantity in the virion in comparison to that of the wild-type virus (1.4% of that of the wild type). In MDCK-SIAT1 cells, the E119V+I222L mutant virus did not present a replicative advantage over the wild-type virus, even in the presence of oseltamivir. Double mutations combining two framework mutations in the NA gene still have to be monitored, as they could induce a high level of resistance to NIs, without impairing the NA affinity. Our study allows a better understanding of the diversity of the mechanisms of resistance to NIs.
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Chan J, Lu A, Bennet AJ. Turnover Is Rate-Limited by Deglycosylation for Micromonospora viridifaciens Sialidase-Catalyzed Hydrolyses: Conformational Implications for the Michaelis Complex. J Am Chem Soc 2011; 133:2989-97. [DOI: 10.1021/ja109199p] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Jefferson Chan
- Departments of Chemistry and Molecular Biology and Biochemistry, Simon Fraser University, 8888 University Drive, Burnaby, British Columbia V5A 1S6, Canada
| | - April Lu
- Departments of Chemistry and Molecular Biology and Biochemistry, Simon Fraser University, 8888 University Drive, Burnaby, British Columbia V5A 1S6, Canada
| | - Andrew J. Bennet
- Departments of Chemistry and Molecular Biology and Biochemistry, Simon Fraser University, 8888 University Drive, Burnaby, British Columbia V5A 1S6, Canada
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Liu Y, Zhang L, Gong J, Fang H, Liu A, Du G, Xu W. Design, synthesis, and biological activity of thiazole derivatives as novel influenza neuraminidase inhibitors. J Enzyme Inhib Med Chem 2010; 26:506-13. [PMID: 21143042 DOI: 10.3109/14756366.2010.534732] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Abstract
A series of novel influenza neuraminidase (NA) inhibitors based on thiazole core were synthesized and evaluated for their ability to inhibit NA of influenza A virus (H(3)N(2)). All compounds were synthesized in good yields starting from commercially available 2-amino-4-thiazole-acetic ester using a suitable synthetic strategy. These compounds showed moderate inhibitory activity against influenza A NA. The most potent compound of this series is compound 4d (IC(50) = 3.43 μM), which is about 20-fold less potent than oseltamivir, and could be used to design novel influenza NA inhibitors that exhibit increased activity based on thiazole ring.
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Affiliation(s)
- Yu Liu
- Department of Medicinal Chemistry, School of Pharmaceutical Sciences, Shandong University, Jinan, Shandong, China
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44
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Hitaoka S, Harada M, Yoshida T, Chuman H. Correlation Analyses on Binding Affinity of Sialic Acid Analogues with Influenza Virus Neuraminidase-1 Using ab Initio MO Calculations on Their Complex Structures. J Chem Inf Model 2010; 50:1796-805. [DOI: 10.1021/ci100225b] [Citation(s) in RCA: 33] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Seiji Hitaoka
- Institute of Health Biosciences, The University of Tokushima Graduate School, 1-78 Shomachi, Tokushima 770-8505, Japan
| | - Masataka Harada
- Institute of Health Biosciences, The University of Tokushima Graduate School, 1-78 Shomachi, Tokushima 770-8505, Japan
| | - Tatsusada Yoshida
- Institute of Health Biosciences, The University of Tokushima Graduate School, 1-78 Shomachi, Tokushima 770-8505, Japan
| | - Hiroshi Chuman
- Institute of Health Biosciences, The University of Tokushima Graduate School, 1-78 Shomachi, Tokushima 770-8505, Japan
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Neuraminidase receptor binding variants of human influenza A(H3N2) viruses resulting from substitution of aspartic acid 151 in the catalytic site: a role in virus attachment? J Virol 2010; 84:6769-81. [PMID: 20410266 DOI: 10.1128/jvi.00458-10] [Citation(s) in RCA: 147] [Impact Index Per Article: 10.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/25/2023] Open
Abstract
Changes in the receptor binding characteristics of human H3N2 viruses have been evident from changes in the agglutination of different red blood cells (RBCs) and the reduced growth capacity of recently isolated viruses, particularly in embryonated eggs. An additional peculiarity of viruses circulating in 2005 to 2009 has been the poor inhibition of hemagglutination by postinfection ferret antisera for many viruses isolated in MDCK cells, including homologous reference viruses. This was shown not to be due to an antigenic change in hemagglutinin (HA) but was shown to be the result of a mutation in aspartic acid 151 of neuraminidase (NA) to glycine, asparagine, or alanine, which caused an oseltamivir-sensitive agglutination of RBCs. The D151G substitution was shown to cause a change in the specificity of NA such that it acquired the capacity to bind receptors, which were refractory to enzymatic cleavage, without altering its ability to remove receptors for HA. Thus, the inhibition of NA-dependent agglutination by the inclusion of oseltamivir carboxylate in the assay was effective in restoring the anti-HA specificity of the hemagglutination inhibition (HI) assay for monitoring antigenic changes in HA. Since the NA-dependent binding activity did not affect virus neutralization, and virus populations in clinical specimens possessed, at most, low levels of the "151 mutant," the biological significance of this feature of NA in, for example, immune evasion is unclear. It is apparent, however, that an important role of aspartic acid 151 in the activity of NA may be to restrict the specificity of the NA interaction and its receptor-destroying activity to complement that of HA receptor binding.
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46
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Identification of an acetyl disulfide derivative in the synthesis of thiosialosides. Carbohydr Res 2010; 345:160-2. [DOI: 10.1016/j.carres.2009.10.017] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/09/2009] [Revised: 10/12/2009] [Accepted: 10/20/2009] [Indexed: 11/24/2022]
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47
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48
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Spiwok V, Tvaroska I. Conformational free energy surface of alpha-N-acetylneuraminic acid: an interplay between hydrogen bonding and solvation. J Phys Chem B 2009; 113:9589-94. [PMID: 19374421 DOI: 10.1021/jp8113495] [Citation(s) in RCA: 31] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
The conformational free energy surface of alpha-N-acetylneuraminic acid (Neu5Ac, sialic acid) in the space of ring-puckering coordinates was calculated using the metadynamics method. Free energy surfaces in vacuum and with an explicit solvent were calculated in GLYCAM 06 force field. In vacuum three structures are almost equivalently populated, namely, the (2)C(5) chair and the B(3,6)/(2)S(6) and (O)S(3) boat/skew-boat conformations. The B(3,6)/(2)S(6) structure is stabilized by an ionic hydrogen bond between the amide N-H bond and the carboxylic group. However, this structure is unfavorable in a water environment in which the experimentally observed (2)C(5) chair conformation is predicted to be more stable than the other structures. These results indicate that environment significantly influences conformation of Neu5Ac and that Neu5Ac-processing enzymes might modify a conformation of their substrates solely by a changing polarity of the environment. The structure of Neu5Ac bound in influenza neuraminidase ((4)S(2)/B(2,5)) belongs to conformations preferred in a water environment. The free energy penalty of this conformational change was calculated (relative to (2)C(5)) as 10.2 +/- 2.0 and 17.3 +/- 2.0 kJ/mol for (4,O)B/(O)S(3) and (4)S(2), respectively. This result indicates that mimicking of the enzyme-bound conformation is likely to be a viable strategy for the design of neuraminidase inhibitors.
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Affiliation(s)
- Vojtech Spiwok
- Department of Structure and Function of Saccharides, Centre for Glycomics, Slovak Academy of Sciences, 84538 Bratislava, Slovak Republic.
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Xu G, Ryan C, Kiefel MJ, Wilson JC, Taylor GL. Structural Studies on the Pseudomonas aeruginosa Sialidase-Like Enzyme PA2794 Suggest Substrate and Mechanistic Variations. J Mol Biol 2009; 386:828-40. [DOI: 10.1016/j.jmb.2008.12.084] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/10/2008] [Revised: 12/23/2008] [Accepted: 12/31/2008] [Indexed: 12/01/2022]
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