301
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Gálvez JA, Díaz-de-Villegas MD, Alías M, Badorrey R. Chiral Iminoesters Derived from d-Glyceraldehyde in [3 + 2] Cycloaddition Reactions. Asymmetric Synthesis of a Key Intermediate in the Synthesis of Neuramidinase Inhibitors. J Org Chem 2013; 78:11404-13. [DOI: 10.1021/jo401967a] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- José A. Gálvez
- Instituto de Síntesis Química y Catálisis Homogénea (ISQCH), CSIC - Universidad de Zaragoza, Departamento de
Catálisis y Procesos Catalíticos, Pedro Cerbuna 12, E-50009 Zaragoza, Spain
| | - María D. Díaz-de-Villegas
- Instituto de Síntesis Química y Catálisis Homogénea (ISQCH), CSIC - Universidad de Zaragoza, Departamento de
Catálisis y Procesos Catalíticos, Pedro Cerbuna 12, E-50009 Zaragoza, Spain
| | - Miriam Alías
- Instituto de Síntesis Química y Catálisis Homogénea (ISQCH), CSIC - Universidad de Zaragoza, Departamento de
Catálisis y Procesos Catalíticos, Pedro Cerbuna 12, E-50009 Zaragoza, Spain
| | - Ramón Badorrey
- Instituto de Síntesis Química y Catálisis Homogénea (ISQCH), CSIC - Universidad de Zaragoza, Departamento de
Catálisis y Procesos Catalíticos, Pedro Cerbuna 12, E-50009 Zaragoza, Spain
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302
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Pan P, Li L, Li Y, Li D, Hou T. Insights into susceptibility of antiviral drugs against the E119G mutant of 2009 influenza A (H1N1) neuraminidase by molecular dynamics simulations and free energy calculations. Antiviral Res 2013; 100:356-64. [DOI: 10.1016/j.antiviral.2013.09.006] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/14/2013] [Revised: 09/07/2013] [Accepted: 09/10/2013] [Indexed: 12/11/2022]
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303
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Abstract
Crystallography is a major tool for structure-driven drug design, as it allows knowledge of the 3D structure of protein targets and protein-ligand complexes. However, the route for crystal structure determination involves many steps, some of which may hamper its high-throughput use. Recent efforts have produced significant advances in experimental and computational tools and protocols. They include automatic crystallization tools, faster data collection devices, more efficient phasing methods and improved ligand-fitting procedures. The timescales of drug-discovery processes have been also reduced by using a fragment-based screening approach. Herein, the achievements in protein crystallography over the last 5 years are reviewed, and advantages and disadvantages of the fragment-based approaches to drug discovery that make use of x-ray crystallography as a primary screening method are examined. In particular, in some detail, five recent case studies pertaining to the development of new hits or leads in relevant therapeutic areas, such as cancer, immune response, inflammation, metabolic syndrome and neurology are described.
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304
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Efficacy of a single intravenous administration of laninamivir (an active metabolite of laninamivir octanoate) in an influenza virus infection mouse model. Antiviral Res 2013; 100:190-5. [DOI: 10.1016/j.antiviral.2013.08.004] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/12/2013] [Revised: 07/02/2013] [Accepted: 08/03/2013] [Indexed: 11/21/2022]
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305
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Vlachakis D, Karozou A, Kossida S. 3D Molecular Modelling Study of the H7N9 RNA-Dependent RNA Polymerase as an Emerging Pharmacological Target. INFLUENZA RESEARCH AND TREATMENT 2013; 2013:645348. [PMID: 24187616 PMCID: PMC3800656 DOI: 10.1155/2013/645348] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 06/05/2013] [Revised: 07/18/2013] [Accepted: 08/11/2013] [Indexed: 12/05/2022]
Abstract
Currently not much is known about the H7N9 strain, and this is the major drawback for a scientific strategy to tackle this virus. Herein, the 3D complex structure of the H7N9 RNA-dependent RNA polymerase has been established using a repertoire of molecular modelling techniques including homology modelling, molecular docking, and molecular dynamics simulations. Strikingly, it was found that the oligonucleotide cleft and tunnel in the H7N9 RNA-dependent RNA polymerase are structurally very similar to the corresponding region on the hepatitis C virus RNA-dependent RNA polymerase crystal structure. A direct comparison and a 3D postdynamics analysis of the 3D complex of the H7N9 RNA-dependent RNA polymerase provide invaluable clues and insight regarding the role and mode of action of a series of interacting residues on the latter enzyme. Our study provides a novel and efficiently intergraded platform with structural insights for the H7N9 RNA-dependent RNA Polymerase. We propose that future use and exploitation of these insights may prove invaluable in the fight against this lethal, ongoing epidemic.
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Affiliation(s)
- Dimitrios Vlachakis
- Bioinformatics & Medical Informatics Team, Biomedical Research Foundation, Academy of Athens, Soranou Efessiou 4, 11527 Athens, Greece
| | - Argiro Karozou
- Bioinformatics & Medical Informatics Team, Biomedical Research Foundation, Academy of Athens, Soranou Efessiou 4, 11527 Athens, Greece
| | - Sophia Kossida
- Bioinformatics & Medical Informatics Team, Biomedical Research Foundation, Academy of Athens, Soranou Efessiou 4, 11527 Athens, Greece
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306
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Wu Y, Qin G, Gao F, Liu Y, Vavricka CJ, Qi J, Jiang H, Yu K, Gao GF. Induced opening of influenza virus neuraminidase N2 150-loop suggests an important role in inhibitor binding. Sci Rep 2013; 3:1551. [PMID: 23531861 PMCID: PMC3609017 DOI: 10.1038/srep01551] [Citation(s) in RCA: 60] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/26/2012] [Accepted: 03/04/2013] [Indexed: 11/23/2022] Open
Abstract
The recently discovered 150-cavity (formed by loop residues 147–152, N2 numbering) adjacent to the enzymatic active site of group 1 influenza A neuraminidase (NA) has introduced a novel target for the design of next-generation NA inhibitors. However, only group 1 NAs, with the exception of the 2009 pandemic H1N1 NA, possess a 150-cavity, and no 150-cavity has been observed in group 2 NAs. The role of the 150-cavity played in enzymatic activity and inhibitor binding is not well understood. Here, we demonstrate for the first time that oseltamivir carboxylate can induce opening of the rigid closed N2 150-loop and provide a novel mechanism for 150-loop movement using molecular dynamics simulations. Our results provide the structural and biophysical basis of the open form of 150-loop and illustrates that the inherent flexibility and the ligand induced flexibility of the 150-loop should be taken into consideration for future drug design.
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Affiliation(s)
- Yan Wu
- CAS Key Laboratory of Pathogenic Microbiology and Immunology, Institute of Microbiology, Chinese Academy of Sciences, Beichen West Road, Beijing 100101, China
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307
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Shanmugam S, Im HT, Sohn YT, Kim KS, Kim YI, Yong CS, Kim JO, Choi HG, Woo JS. Zanamivir oral delivery: enhanced plasma and lung bioavailability in rats. Biomol Ther (Seoul) 2013; 21:161-9. [PMID: 24009875 PMCID: PMC3762309 DOI: 10.4062/biomolther.2013.010] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/22/2013] [Revised: 02/05/2013] [Accepted: 02/07/2013] [Indexed: 11/16/2022] Open
Abstract
The objective of this study was to enhance the oral bioavailability (BA) of zanamivir (ZMR) by increasing its intestinal permeability using permeation enhancers (PE). Four different classes of PEs (Labrasol®, sodium cholate, sodium caprate, hydroxypropyl β-cyclodextrin) were investigated for their ability to enhance the permeation of ZMR across Caco-2 cell monolayers. The flux and Papp of ZMR in the presence of sodium caprate (SC) was significantly higher than other PEs in comparison to control, and was selected for further investigation. All concentrations of SC (10-200 mM) demonstrated enhanced flux of ZMR in comparison to control. The highest flux (13 folds higher than control) was achieved for the formulation with highest SC concentration (200 mM). The relative BA of ZMR formulation containing SC (PO-SC) in plasma at a dose of 10 mg/kg following oral administration in rats was 317.65% in comparison to control formulation (PO-C). Besides, the AUC0-24 h of ZMR in the lungs following oral administration of PO-SC was 125.22 ± 27.25 ng hr ml-1 with a Cmax of 156.00 ± 24.00 ng/ml reached at 0.50±0.00 h. But, there was no ZMR detected in the lungs following administration of control formulation (PO-C). The findings of this study indicated that the oral formulation PO-SC containing ZMR and SC was able to enhance the BA of ZMR in plasma to an appropriate amount that would make ZMR available in lungs at a concentration higher (>10 ng/ml) than the IC50 concentration of influenza virus (0.64-7.9 ng/ml) to exert its therapeutic effect.
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Affiliation(s)
- Srinivasan Shanmugam
- Pharm. R&D Institute, Hanmi Pharm. Co., Ltd., Hwasung 445-913, Republic of Korea
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308
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Application of electrolysis for inactivation of an antiviral drug that is one of possible selection pressure to drug-resistant influenza viruses. J Virol Methods 2013; 194:154-60. [PMID: 23994466 DOI: 10.1016/j.jviromet.2013.08.007] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/25/2013] [Revised: 08/06/2013] [Accepted: 08/09/2013] [Indexed: 11/22/2022]
Abstract
The recent development of antiviral drugs has led to concern that the release of the chemicals in surface water due to expanded medical use could induce drug-resistant mutant viruses in zoonosis. Many researchers have noted that the appearance of an oseltamivir (Tamiflu(®))-resistant avian influenza mutant virus, which may spread to humans, could be induced by oseltamivir contamination of surface water. Although past studies have reported electrolysis as a possible method for degradation of antineoplastics and antibacterials in water, the validity of the method for treatment of antiviral drugs is unknown. In this study, electrolysis was used to degrade an antiviral prodrug, oseltamivir, and a stable active form, oseltamivir carboxylate, and the degradation process was monitored with HPLC-UV and the neuraminidase inhibitory assay. HPLC-UV-detectable oseltamivir and oseltamivir carboxylate were decomposed by electrolysis within 60 min, and inhibitory activity of neuraminidase decreased below the detection limit of the assay used. Cytotoxic and genotoxic activity were not detected in electrolyzed fluid. These results indicate that electrolysis is a possible treatment for inactivation of the antiviral drug oseltamivir.
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309
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Singh SP, Gogoi D, Bezbaruah RL, Bordoloi MJ, Barua NC. Virtual screening on potential neuraminidase inhibitors of influenza A virus H1N1. ACTA ACUST UNITED AC 2013. [DOI: 10.1016/j.dit.2013.06.005] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
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310
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Abstract
Sialic acids are involved in a plethora of important biological events; among these the most known certainly is the binding of N-acetylneuraminic acid (Neu5Ac) with influenza virus sialidase. Considering Neu5Ac as the template that led to the structure-based development of the two potent antiviral agents zanamivir and oseltamivir, we developed the synthesis of the sialylexoenitol, a new class of sialyl derivative that was used as precursor in powerful hetero-Diels–Alder reactions to form the corresponding spiroketals. Docking calculations employing the crystallographic structure of influenza virus sialidase indicate that these scaffolds could probably interact with most of the active site residues that stabilize Neu5Ac. In addition, their reduced polar nature with respect to Neu5Ac derivatives might provide inhibitors with increased bioavailability.
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311
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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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312
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Han N, Mu Y. Locking the 150-cavity open: in silico design and verification of influenza neuraminidase inhibitors. PLoS One 2013; 8:e73344. [PMID: 24015302 PMCID: PMC3755005 DOI: 10.1371/journal.pone.0073344] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/02/2013] [Accepted: 07/29/2013] [Indexed: 11/22/2022] Open
Abstract
Neuraminidase (NA) of influenza is a key target for virus infection control and the recently discovered open 150-cavity in group-1 NA provides new opportunity for novel inhibitors design. In this study, we used a combination of theoretical methods including fragment docking, molecular linking and molecular dynamics simulations to design ligands that specifically target at the 150-cavity. Through in silico screening of a fragment compound library on the open 150-cavity of NA, a few best scored fragment compounds were selected to link with Zanamivir, one NA-targeting drug. The resultant new ligands may bind both the active site and the 150-cavity of NA simultaneously. Extensive molecular dynamics simulations in explicit solvent were applied to validate the binding between NA and the designed ligands. Moreover, two control systems, a positive control using Zanamivir and a negative control using a low-affinity ligand 3-(p-tolyl) allyl-Neu5Ac2en (ETT, abbreviation reported in the PDB) found in a recent experimental work, were employed to calibrate the simulation method. During the simulations, ETT was observed to detach from NA, on the contrary, both Zanamivir and our designed ligand bind NA firmly. Our study provides a prospective way to design novel inhibitors for controlling the spread of influenza virus.
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Affiliation(s)
- Nanyu Han
- School of Biological Sciences, Nanyang Technological University, Singapore, Singapore
| | - Yuguang Mu
- School of Biological Sciences, Nanyang Technological University, Singapore, Singapore
- * E-mail:
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313
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Marathe BM, Lévêque V, Klumpp K, Webster RG, Govorkova EA. Determination of neuraminidase kinetic constants using whole influenza virus preparations and correction for spectroscopic interference by a fluorogenic substrate. PLoS One 2013; 8:e71401. [PMID: 23977037 PMCID: PMC3744557 DOI: 10.1371/journal.pone.0071401] [Citation(s) in RCA: 38] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/02/2013] [Accepted: 06/29/2013] [Indexed: 11/18/2022] Open
Abstract
The influenza neuraminidase (NA) enzyme cleaves terminal sialic acid residues from cellular receptors, a process required for the release of newly synthesized virions. A balance of NA activity with sialic acid binding affinity of hemagglutinin (HA) is important for optimal virus replication. NA sequence evolution through genetic shift and drift contributes to the continuous modulation of influenza virus fitness and pathogenicity. A simple and reliable method for the determination of kinetic parameters of NA activity could add significant value to global influenza surveillance and provide parameters for the projection of fitness and pathogenicity of emerging virus variants. The use of fluorogenic substrate 2′-(4-methylumbelliferyl)-α-D-N-acetylneuraminic acid (MUNANA) and cell- or egg-grown whole influenza virus preparations have been attractive components of NA enzyme activity investigations. We describe important criteria to be addressed when determining Km and Vmax kinetic parameters using this method: (1) determination of the dynamic range of MUNANA and 4-methylumbelliferone product (4-MU) fluorescence for the instrument used; (2) adjustment of reaction conditions to approximate initial rate conditions, i.e. ≤15% of substrate converted during the reaction, with signal-to-noise ratio ≥10; (3) correction for optical interference and inner filter effect caused by increasing concentrations of MUNANA substrate. The results indicate a significant interference of MUNANA with 4-MU fluorescence determination. The criteria proposed enable an improved rapid estimation of NA kinetic parameters and facilitate comparison of data between laboratories.
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Affiliation(s)
- Bindumadhav M. Marathe
- Division of Virology, Department of Infectious Diseases, St. Jude Children’s Research Hospital, Memphis, Tennessee, United States of America
| | - Vincent Lévêque
- Virology Discovery, Hoffmann-La Roche Inc., Nutley, New Jersey, United States of America
| | - Klaus Klumpp
- Virology Discovery, Hoffmann-La Roche Inc., Nutley, New Jersey, United States of America
| | - Robert G. Webster
- Division of Virology, Department of Infectious Diseases, St. Jude Children’s Research Hospital, Memphis, Tennessee, United States of America
- Department of Pathology, University of Tennessee, Memphis, Tennessee, United States of America
| | - Elena A. Govorkova
- Division of Virology, Department of Infectious Diseases, St. Jude Children’s Research Hospital, Memphis, Tennessee, United States of America
- * E-mail:
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314
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Beyleveld G, White KM, Ayllon J, Shaw ML. New-generation screening assays for the detection of anti-influenza compounds targeting viral and host functions. Antiviral Res 2013; 100:120-32. [PMID: 23933115 DOI: 10.1016/j.antiviral.2013.07.018] [Citation(s) in RCA: 34] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/15/2013] [Revised: 07/23/2013] [Accepted: 07/26/2013] [Indexed: 01/08/2023]
Abstract
Current options for influenza antiviral therapy are limited to the neuraminidase inhibitors, and knowledge that high levels of oseltamivir resistance have been seen among previously circulating H1N1 viruses increases the urgency to find new influenza therapeutics. To feed this pipeline, assays that are appropriate for use in high-throughput screens are being developed and are discussed in this review. Particular emphasis is placed on cell-based assays that capture both inhibitors of viral functions as well as the host functions that facilitate optimal influenza virus replication. Success in this area has been fueled by a greater understanding of the genome structure of influenza viruses and the ability to generate replication-competent recombinant viruses that carry a reporter gene, allowing for easy monitoring of viral infection in a high-throughput setting. This article forms part of a symposium in Antiviral Research on "Treatment of influenza: targeting the virus or the host."
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Affiliation(s)
- Grant Beyleveld
- Department of Microbiology and Graduate School of Biomedical Sciences, Icahn School of Medicine at Mount Sinai, New York, NY, USA
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315
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Mechanism of action of T-705 ribosyl triphosphate against influenza virus RNA polymerase. Antimicrob Agents Chemother 2013; 57:5202-8. [PMID: 23917318 DOI: 10.1128/aac.00649-13] [Citation(s) in RCA: 143] [Impact Index Per Article: 13.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/03/2023] Open
Abstract
T-705 (favipiravir; 6-fluoro-3-hydroxy-2-pyrazinecarboxamide) selectively and strongly inhibits replication of the influenza virus in vitro and in vivo. T-705 has been shown to be converted to T-705-4-ribofuranosyl-5-triphosphate (T-705RTP) by intracellular enzymes and then functions as a nucleotide analog to selectively inhibit RNA-dependent RNA polymerase (RdRp) of the influenza virus. To elucidate these inhibitory mechanisms, we analyzed the enzyme kinetics of inhibition using Lineweaver-Burk plots of four natural nucleoside triphosphates and conducted polyacrylamide gel electrophoresis of the primer extension products initiated from (32)P-radiolabeled 5'Cap1 RNA. Enzyme kinetic analysis demonstrated that T-705RTP inhibited the incorporation of ATP and GTP in a competitive manner, which suggests that T-705RTP is recognized as a purine nucleotide by influenza virus RdRp and inhibited the incorporation of UTP and CTP in noncompetitive and mixed-type manners, respectively. Primer extension analysis demonstrated that a single molecule of T-705RTP was incorporated into the nascent RNA strand of the influenza virus and inhibited the subsequent incorporation of nucleotides. These results suggest that a single molecule of T-705RTP is incorporated into the nascent RNA strand as a purine nucleotide analog and inhibits strand extension, even though the natural ribose of T-705RTP has a 3'-OH group, which is essential for forming a covalent bond with the phosphate group.
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316
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Rudrawar S, Dyason JC, Maggioni A, Thomson RJ, Itzstein MV. Novel 3,4-disubstituted-Neu5Ac2en derivatives as probes to investigate flexibility of the influenza virus sialidase 150-loop. Bioorg Med Chem 2013; 21:4820-30. [DOI: 10.1016/j.bmc.2013.05.054] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/31/2012] [Revised: 04/17/2013] [Accepted: 05/28/2013] [Indexed: 10/26/2022]
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317
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LI RUI, WANG YENGTSENG, CHEN CHENGLUNG. COMPUTATIONAL MODELING STUDY ON METABOLISM MECHANISM OF OSELTAMIVIR. JOURNAL OF THEORETICAL & COMPUTATIONAL CHEMISTRY 2013. [DOI: 10.1142/s0219633613500375] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
Abstract
Oseltamivir (OTV) is widely used in the treatment of both influenza virus A and B infections. Additionally, OTV is an effective antiviral drug in treating the 2009 A ( H1N1 ) influenza virus. Clinical studies concluded that OTV is readily extensively converted to the active carboxylate metabolite after oral administration. In order to investigate the metabolism mechanism of OTV, we carried out density functional theory (DFT) quantum mechanical calculations. The molecule orbital (MO) theory and natural population analysis (NPA) were also employed to help understanding the reaction mechanism. All possible reaction pathways for OTV metabolism are considered, involving hydrolysis of ester and amide. Two mechanisms were considered in this work, viz. concerted mechanism and stepwise mechanism. Our results indicate the stepwise mechanism is more favorable in both hydrolysis reactions and the rate-determining stage is the formation of the tetrahedral intermediate. In addition, the hydrolysis reactions can be assisted by substrate NH2 group and solvent water molecules. The substrate-assisted mechanism for the formation of the carboxylate metabolite is the most favorable one.
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Affiliation(s)
- RUI LI
- Department of Chemistry, Liaocheng University, Liaocheng, 252059, Shandong, P. R. China
| | - YENG-TSENG WANG
- National Center for High-Performance Computing, Hsin-Shi, Tainan, 74147, Taiwan, ROC
| | - CHENG-LUNG CHEN
- Department of Chemistry, National Sun Yat-Sen University, Kaohsiung, 80424, Taiwan, ROC
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318
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Quiliano M, Valdivia-Olarte H, Olivares C, Requena D, Gutiérrez AH, Reyes-Loyola P, Tolentino-Lopez LE, Sheen P, Briz V, Muñoz-Fernández MA, Correa-Basurto J, Zimic M. Molecular distribution of amino acid substitutions on neuraminidase from the 2009 (H1N1) human influenza pandemic virus. Bioinformation 2013; 9:673-9. [PMID: 23930018 PMCID: PMC3732439 DOI: 10.6026/97320630009673] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/07/2013] [Accepted: 05/08/2013] [Indexed: 12/11/2022] Open
Abstract
The pandemic influenza AH1N1 (2009) caused an outbreak of human infection that spread to the world. Neuraminidase (NA) is an antigenic surface glycoprotein, which is essential to the influenza infection process, and is the target of anti-flu drugs oseltamivir and zanamivir. Currently, NA inhibitors are the pillar pharmacological strategy against seasonal and global influenza. Although mutations observed after NA-inhibitor treatment are characterized by changes in conserved amino acids of the enzyme catalytic site, it is possible that specific amino acid substitutions (AASs) distant from the active site such as H274Y, could confer oseltamivir or zanamivir resistance. To better understand the molecular distribution pattern of NA AASs, we analyzed NA AASs from all available reported pandemic AH1N1 NA sequences, including those reported from America, Africa, Asia, Europe, Oceania, and specifically from Mexico. The molecular distributions of the AASs were obtained at the secondary structure domain level for both the active and catalytic sites, and compared between geographic regions. Our results showed that NA AASs from America, Asia, Europe, Oceania and Mexico followed similar molecular distribution patterns. The compiled data of this study showed that highly conserved amino acids from the NA active site and catalytic site are indeed being affected by mutations. The reported NA AASs follow a similar molecular distribution pattern worldwide. Although most AASs are distributed distantly from the active site, this study shows the emergence of mutations affecting the previously conserved active and catalytic site. A significant number of unique AASs were reported simultaneously on different continents.
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Affiliation(s)
- MiguelMiguel Quiliano
- Laboratorio de Bioinformática y Biología Molecular, Laboratorios de Investigación y Desarrollo, Facultad de Ciencias y Filosofía,
Universidad Peruana Cayetano Heredia. Av. Honorio Delgado, 430. SMP. Lima, Peru
- Drug R&D Unit, Center for Applied Pharmacobiology Research, University of Navarra, C/ Irunlarrea s/n, 31008, Pamplona, Spain
| | - Hugo Valdivia-Olarte
- Laboratorio de Bioinformática y Biología Molecular, Laboratorios de Investigación y Desarrollo, Facultad de Ciencias y Filosofía,
Universidad Peruana Cayetano Heredia. Av. Honorio Delgado, 430. SMP. Lima, Peru
| | - Carlos Olivares
- Laboratorio de Bioinformática y Biología Molecular, Laboratorios de Investigación y Desarrollo, Facultad de Ciencias y Filosofía,
Universidad Peruana Cayetano Heredia. Av. Honorio Delgado, 430. SMP. Lima, Peru
- Department of Physics, PUC-Rio, Rua Marquês de São Vicente, 225, Gávea - Rio de Janeiro, Brazil
| | - David Requena
- Laboratorio de Bioinformática y Biología Molecular, Laboratorios de Investigación y Desarrollo, Facultad de Ciencias y Filosofía,
Universidad Peruana Cayetano Heredia. Av. Honorio Delgado, 430. SMP. Lima, Peru
| | - Andrés H Gutiérrez
- Laboratorio de Bioinformática y Biología Molecular, Laboratorios de Investigación y Desarrollo, Facultad de Ciencias y Filosofía,
Universidad Peruana Cayetano Heredia. Av. Honorio Delgado, 430. SMP. Lima, Peru
| | - Paola Reyes-Loyola
- Laboratorio de Modelado Molecular y Bioinformática de la Escuela Superior de Medicina, Instituto Politécnico Nacional, México.
Plan de San Luis Y Diaz Mirón S/N, Col. Casco de Santo Tomas, Mexico city, México
| | - Luis E Tolentino-Lopez
- Laboratorio de Modelado Molecular y Bioinformática de la Escuela Superior de Medicina, Instituto Politécnico Nacional, México.
Plan de San Luis Y Diaz Mirón S/N, Col. Casco de Santo Tomas, Mexico city, México
| | - Patricia Sheen
- Laboratorio de Bioinformática y Biología Molecular, Laboratorios de Investigación y Desarrollo, Facultad de Ciencias y Filosofía,
Universidad Peruana Cayetano Heredia. Av. Honorio Delgado, 430. SMP. Lima, Peru
| | - Verónica Briz
- Laboratorio de Inmunobiología Molecular, Hospital Universitario Gregorio Marañón, Madrid, España, CIBER BBN, Madrid, Spain
| | - Maria A Muñoz-Fernández
- Laboratorio de Inmunobiología Molecular, Hospital Universitario Gregorio Marañón, Madrid, España, CIBER BBN, Madrid, Spain
| | - José Correa-Basurto
- Laboratorio de Modelado Molecular y Bioinformática de la Escuela Superior de Medicina, Instituto Politécnico Nacional, México.
Plan de San Luis Y Diaz Mirón S/N, Col. Casco de Santo Tomas, Mexico city, México
| | - Mirko Zimic
- Laboratorio de Bioinformática y Biología Molecular, Laboratorios de Investigación y Desarrollo, Facultad de Ciencias y Filosofía,
Universidad Peruana Cayetano Heredia. Av. Honorio Delgado, 430. SMP. Lima, Peru
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319
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Klermund L, Groher A, Castiglione K. New N-acyl-D-glucosamine 2-epimerases from cyanobacteria with high activity in the absence of ATP and low inhibition by pyruvate. J Biotechnol 2013; 168:256-63. [PMID: 23850800 DOI: 10.1016/j.jbiotec.2013.07.003] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/11/2013] [Revised: 06/06/2013] [Accepted: 07/02/2013] [Indexed: 01/17/2023]
Abstract
N-Acetylneuraminic acid, an important component of glycoconjugates with various biological functions, can be produced from N-acetyl-D-glucosamine (GlcNAc) and pyruvate using a one-pot, two-enzyme system consisting of N-acyl-D-glucosamine 2-epimerase (AGE) and N-acetylneuraminate lyase (NAL). In this system, the epimerase catalyzes the conversion of GlcNAc into N-acetyl-D-mannosamine (ManNAc). However, all currently known AGEs have one or more disadvantages, such as a low specific activity, substantial inhibition by pyruvate and strong dependence on allosteric activation by ATP. Therefore, four novel AGEs from the cyanobacteria Acaryochloris marina MBIC 11017, Anabaena variabilis ATCC 29413, Nostoc sp. PCC 7120, and Nostoc punctiforme PCC 73102 were characterized. Among these enzymes, the AGE from the Anabaena strain showed the most beneficial characteristics. It had a high specific activity of 117±2 U mg(-1) at 37 °C (pH 7.5) and an up to 10-fold higher inhibition constant for pyruvate as compared to other AGEs indicating a much weaker inhibitory effect. The investigation of the influence of ATP revealed that the nucleotide has a more pronounced effect on the Km for the substrate than on the enzyme activity. At high substrate concentrations (≥200 mM) and without ATP, the enzyme reached up to 32% of the activity measured with ATP in excess.
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Affiliation(s)
- Ludwig Klermund
- Institute of Biochemical Engineering, Technische Universität München, Boltzmannstr. 15, 85748 Garching, Germany
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320
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Albohy A, Zhang Y, Smutova V, Pshezhetsky AV, Cairo CW. Identification of Selective Nanomolar Inhibitors of the Human Neuraminidase, NEU4. ACS Med Chem Lett 2013; 4:532-7. [PMID: 24900705 DOI: 10.1021/ml400080t] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/25/2013] [Accepted: 04/26/2013] [Indexed: 12/31/2022] Open
Abstract
The human neuraminidase enzymes (hNEU) play important roles in human physiology and pathology. The lack of potent and selective inhibitors toward these enzymes has limited our understanding of their function and the development of therapeutic applications. Here we report the evaluation of a panel of compounds against the four human neuraminidase isoenzymes. Among the compounds tested, we identified the first selective, nanomolar inhibitors of the human neuraminidase 4 enzyme (NEU4). The most potent NEU4 inhibitor (5-acetamido-9-[4-hydroxymethyl[1,2,3]triazol-1-yl]-2,3,5,9-tetradeoxy-d-glycero-d-galacto-2-nonulopyranosonic acid) was found to have an inhibitory constant (K i ) of 30 ± 19 nM and was 500-fold selective for its target over the other hNEU isoenzymes tested in vitro (NEU1, NEU2, and NEU3). This is the first report of any inhibitor of hNEU with nanomolar potency, and this confirms that the 2,3-didehydro-2-deoxy-N-acetylneuraminic acid (DANA) scaffold can be exploited to develop new, potent, and selective inhibitors that target this important family of human enzymes.
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Affiliation(s)
- Amgad Albohy
- Alberta Glycomics
Center, Department
of Chemistry, University of Alberta, Edmonton
Alberta T6G 2G2, Canada
| | - Yi Zhang
- Alberta Glycomics
Center, Department
of Chemistry, University of Alberta, Edmonton
Alberta T6G 2G2, Canada
| | - Victoria Smutova
- Division of Medical Genetics,
Centre Hospitaliere Universitaire Sainte-Justine, University of Montreal, Montreal, Quebec, Canada, and Department
of Anatomy and Cell Biology, Faculty of Medicine, McGill University, Montreal, Quebec, Canada
| | - Alexey V. Pshezhetsky
- Division of Medical Genetics,
Centre Hospitaliere Universitaire Sainte-Justine, University of Montreal, Montreal, Quebec, Canada, and Department
of Anatomy and Cell Biology, Faculty of Medicine, McGill University, Montreal, Quebec, Canada
| | - Christopher W. Cairo
- Alberta Glycomics
Center, Department
of Chemistry, University of Alberta, Edmonton
Alberta T6G 2G2, Canada
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321
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Han N, Mu Y. Plasticity of 150-loop in influenza neuraminidase explored by Hamiltonian replica exchange molecular dynamics simulations. PLoS One 2013; 8:e60995. [PMID: 23593372 PMCID: PMC3622661 DOI: 10.1371/journal.pone.0060995] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/17/2012] [Accepted: 03/05/2013] [Indexed: 11/22/2022] Open
Abstract
Neuraminidase (NA) of influenza is a key target for antiviral inhibitors, and the 150-cavity in group-1 NA provides new insight in treating this disease. However, NA of 2009 pandemic influenza (09N1) was found lacking this cavity in a crystal structure. To address the issue of flexibility of the 150-loop, Hamiltonian replica exchange molecular dynamics simulations were performed on different groups of NAs. Free energy landscape calculated based on the volume of 150-cavity indicates that 09N1 prefers open forms of 150-loop. The turn A (residues 147–150) of the 150-loop is discovered as the most dynamical motif which induces the inter-conversion of this loop among different conformations. In the turn A, the backbone dynamic of residue 149 is highly related with the shape of 150-loop, thus can function as a marker for the conformation of 150-loop. As a contrast, the closed conformation of 150-loop is more energetically favorable in N2, one of group-2 NAs. The D147-H150 salt bridge is found having no correlation with the conformation of 150-loop. Instead the intimate salt bridge interaction between the 150 and 430 loops in N2 variant contributes the stabilizing factor for the closed form of 150-loop. The clustering analysis elaborates the structural plasticity of the loop. This enhanced sampling simulation provides more information in further structural-based drug discovery on influenza virus.
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Affiliation(s)
- Nanyu Han
- School of Biological Sciences, Nanyang Technological University, Singapore, Singapore
| | - Yuguang Mu
- School of Biological Sciences, Nanyang Technological University, Singapore, Singapore
- * E-mail:
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322
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Greenway KT, LeGresley EB, Pinto BM. The influence of 150-cavity binders on the dynamics of influenza A neuraminidases as revealed by molecular dynamics simulations and combined clustering. PLoS One 2013; 8:e59873. [PMID: 23544106 PMCID: PMC3609799 DOI: 10.1371/journal.pone.0059873] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/08/2012] [Accepted: 02/19/2013] [Indexed: 11/18/2022] Open
Abstract
Neuraminidase inhibitors are the main pharmaceutical agents employed for treatments of influenza infections. The neuraminidase structures typically exhibit a 150-cavity, an exposed pocket that is adjacent to the catalytic site. This site offers promising additional contact points for improving potency of existing pharmaceuticals, as well as generating entirely new candidate inhibitors. Several inhibitors based on known compounds and designed to interact with 150-cavity residues have been reported. However, the dynamics of any of these inhibitors remains unstudied and their viability remains unknown. This work reports the outcome of long-term, all-atom molecular dynamics simulations of four such inhibitors, along with three standard inhibitors for comparison. Each is studied in complex with four representative neuraminidase structures, which are also simulated in the absence of ligands for comparison, resulting in a total simulation time of 9.6 µs. Our results demonstrate that standard inhibitors characteristically reduce the mobility of these dynamic proteins, while the 150-binders do not, instead giving rise to many unique conformations. We further describe an improved RMSD-based clustering technique that isolates these conformations--the structures of which are provided to facilitate future molecular docking studies--and reveals their interdependence. We find that this approach confers many advantages over previously described techniques, and the implications for rational drug design are discussed.
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Affiliation(s)
- Kyle T. Greenway
- Department of Chemistry, Simon Fraser University, Burnaby, British Columbia, Canada
| | - Eric B. LeGresley
- Department of Chemistry, Simon Fraser University, Burnaby, British Columbia, Canada
| | - B. Mario Pinto
- Department of Chemistry, Simon Fraser University, Burnaby, British Columbia, Canada
- * E-mail:
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323
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Zhang Y, Albohy A, Zou Y, Smutova V, Pshezhetsky AV, Cairo CW. Identification of selective inhibitors for human neuraminidase isoenzymes using C4,C7-modified 2-deoxy-2,3-didehydro-N-acetylneuraminic acid (DANA) analogues. J Med Chem 2013; 56:2948-58. [PMID: 23530623 DOI: 10.1021/jm301892f] [Citation(s) in RCA: 34] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Abstract
In the past two decades, human neuraminidases (human sialidases, hNEUs) have been found to be involved in numerous pathways in biology. The development of selective and potent inhibitors of these enzymes will provide critical tools for glycobiology, help to avoid undesired side effects of antivirals, and may reveal new small-molecule therapeutic targets for human cancers. However, because of the high active site homology of the hNEU isoenzymes, little progress in the design and synthesis of selective inhibitors has been realized. Guided by our previous studies of human NEU3 inhibitors, we designed a series of C4,C7-modified analogues of 2-deoxy-2,3-didehydro-N-acetylneuraminic acid (DANA) and tested them against the full panel of hNEU isoenzymes (NEU1, NEU2, NEU3, NEU4). We identified inhibitors with up to 38-fold selectivity for NEU3 and 12-fold selectivity for NEU2 over all other isoenzymes. We also identified compounds that targeted NEU2 and NEU3 with similar potency.
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Affiliation(s)
- Yi Zhang
- Alberta Glycomics Center, Department of Chemistry, University of Alberta, Edmonton, Alberta T6G 2G2, Canada
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324
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Alagiri K, Furutachi M, Yamatsugu K, Kumagai N, Watanabe T, Shibasaki M. Two approaches toward the formal total synthesis of oseltamivir phosphate (Tamiflu): catalytic enantioselective three-component reaction strategy and L-glutamic acid strategy. J Org Chem 2013; 78:4019-26. [PMID: 23517385 DOI: 10.1021/jo400360j] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/10/2023]
Abstract
Two independent formal total syntheses of oseltamivir phosphate were successfully achieved: the first utilized a copper-catalyzed asymmetric three-component reaction strategy, and the second utilized L-glutamic acid γ-ester as a chiral source to install the correct stereochemistry. Both strategies used Dieckmann condensation to construct a six-membered ring core, after which manipulation of the functional groups and protecting groups accessed Corey's intermediate for the synthesis of oseltamivir phosphate. While the first synthesis was accomplished via four purification steps in 25.7% overall yield, albeit with moderate optical purity (76% ee), the second strategy achieved the synthesis via six purification steps in 19.8% overall yield with perfect enantiocontrol.
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Affiliation(s)
- Kaliyamoorthy Alagiri
- Institute of Microbial Chemistry (BIKAKEN), Tokyo, 3-14-23 Kamiosaki, Shinagawa-ku, Tokyo 141-0021, Japan
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325
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Differential transport of Influenza A neuraminidase signal anchor peptides to the plasma membrane. FEBS Lett 2013; 587:1411-7. [PMID: 23523923 DOI: 10.1016/j.febslet.2013.03.019] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/19/2012] [Revised: 03/08/2013] [Accepted: 03/12/2013] [Indexed: 11/21/2022]
Abstract
Influenza A Neuraminidase is essential for virus release from the cell surface of host cells. Given differential structures of the N-terminal sequences including the transmembrane domains of neuraminidase subtypes, we investigated their contribution to transport and localization of subtypes N1, N2 and N8 to the plasma membrane. We generated consensus sequences from all protein entries available for these subtypes. We found that 40N-terminal the forty N-terminal amino acids are sufficient to confer plasma membrane localization of fusion proteins, albeit with different efficiencies. Strikingly, subtle differences in the primary structure of the part of the transmembrane domain that resides in the exoplasmic leaflet of the membrane have a major impact on transport efficiency, providing a potential target for the inhibition of virus release.
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326
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Gurung MK, Ræder ILU, Altermark B, Smalås AO. Characterization of the sialic acid synthase from Aliivibrio salmonicida suggests a novel pathway for bacterial synthesis of 7-O-acetylated sialic acids. Glycobiology 2013; 23:806-19. [PMID: 23481098 DOI: 10.1093/glycob/cwt018] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/22/2023] Open
Abstract
Resolving the enzymatic pathways leading to sialic acids (Sias) in bacteria are vitally important for understanding their roles in pathogenesis and for subsequent development of tools to combat infections. A detailed characterization of the involved enzymes is also essential due to the highly applicable properties of Sias, i.e., as used in a wide range of medical applications and human nutrition. Bacterial strains that produce Sias display them mainly on their cell surface to mimic animal cells thereby evading the host's immune system. Despite several studies, little is known about the virulence mechanisms of the fish pathogen Aliivibrio salmonicida. The genome of A. salmonicida LFI1238 contains a gene cluster homologous to the Escherichia coli neuraminic acid (Neu) gene cluster involved in biosynthesis of Sias found in the E. coli capsule. This cluster is probably responsible for the biosynthesis of Neu found in A. salmonicida. In this work, we have produced and characterized the sialic acid (Sia) synthase NeuB1, the key enzyme in the pathway. The Sia synthase is an enzyme producing N-acetylneuraminic acid by the condensation of N-acetylmannosamine and phosphoenolpyruvate. Genome content, kinetic data obtained, together with structural considerations, have led us to the prediction that the substrate for NeuB1 from A. salmonicida, E. coli and Streptococcus agalactiae among others, is 4-O-acetyl-N-acetylmannosamine. This means that the product of its enzymatic reaction is 7-O-acetyl-N-acetylneuraminic acid. We propose a pathway for production of this Sia in A. salmonicida, and present evidence for the presence of diacetylated Neu in the bacterium.
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Affiliation(s)
- Man K Gurung
- Department of Chemistry, The Norwegian Structural Biology Center NorStruct, University of Tromsø, N-9037 Tromsø, Norway
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327
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Rudrawar S, Pascolutti M, Bhatt B, Thomson RJ, von Itzstein M. An efficient synthesis of C3 C-alkylated Neu5Ac2en derivatives. Tetrahedron Lett 2013. [DOI: 10.1016/j.tetlet.2012.12.064] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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328
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Bioengineering of bacterial polymer inclusions catalyzing the synthesis of N-acetylneuraminic acid. Appl Environ Microbiol 2013; 79:3116-21. [PMID: 23455347 DOI: 10.1128/aem.03947-12] [Citation(s) in RCA: 32] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/30/2023] Open
Abstract
N-Acetylneuraminic acid is produced by alkaline epimerization of N-acetylglucosamine to N-acetylmannosamine and then subsequent condensation with pyruvate catalyzed by free N-acetylneuraminic acid aldolase. The high-alkaline conditions of this process result in the degradation of reactants and products, while the purification of free enzymes to be used for the synthesis reaction is a costly process. The use of N-acetylglucosamine 2-epimerase has been seen as an alternative to the alkaline epimerization process. In this study, these two enzymes involved in N-acetylneuraminic acid production were immobilized to biopolyester beads in vivo in a one-step, cost-efficient process of production and isolation. Beads with epimerase-only, aldolase-only, and combined epimerase/aldolase activity were recombinantly produced in Escherichia coli. The enzymatic activities were 32 U, 590 U, and 2.2 U/420 U per gram dry bead weight, respectively. Individual beads could convert 18% and 77% of initial GlcNAc and ManNAc, respectively, at high substrate concentrations and near-neutral pH, demonstrating the application of this biobead technology to fine-chemical synthesis. Beads establishing the entire N-acetylneuraminic acid synthesis pathway were able to convert up to 22% of the initial N-acetylglucosamine after a 50-h reaction time into N-acetylneuraminic acid.
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329
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North RA, Kessans SA, Atkinson SC, Suzuki H, Watson AJA, Burgess BR, Angley LM, Hudson AO, Varsani A, Griffin MDW, Fairbanks AJ, Dobson RCJ. Cloning, expression, purification, crystallization and preliminary X-ray diffraction studies of N-acetylneuraminate lyase from methicillin-resistant Staphylococcus aureus. Acta Crystallogr Sect F Struct Biol Cryst Commun 2013; 69:306-12. [PMID: 23519810 PMCID: PMC3606580 DOI: 10.1107/s1744309113003060] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/19/2012] [Accepted: 01/30/2013] [Indexed: 01/13/2023]
Abstract
The enzyme N-acetylneuraminate lyase (EC 4.1.3.3) is involved in the metabolism of sialic acids. Specifically, the enzyme catalyzes the retro-aldol cleavage of N-acetylneuraminic acid to form N-acetyl-D-mannosamine and pyruvate. Sialic acids comprise a large family of nine-carbon amino sugars, all of which are derived from the parent compound N-acetylneuraminic acid. In recent years, N-acetylneuraminate lyase has received considerable attention from both mechanistic and structural viewpoints and has been recognized as a potential antimicrobial drug target. The N-acetylneuraminate lyase gene was cloned from methicillin-resistant Staphylococcus aureus genomic DNA, and recombinant protein was expressed and purified from Escherichia coli BL21 (DE3). The enzyme crystallized in a number of crystal forms, predominantly from PEG precipitants, with the best crystal diffracting to beyond 1.70 Å resolution in space group P2₁. Molecular replacement indicates the presence of eight monomers per asymmetric unit. Understanding the structural biology of N-acetylneuraminate lyase in pathogenic bacteria, such as methicillin-resistant S. aureus, will provide insights for the development of future antimicrobials.
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Affiliation(s)
- Rachel A. North
- Biomolecular Interaction Centre and School of Biological Sciences, University of Canterbury, Private Bag 4800, Christchurch 8041, New Zealand
| | - Sarah A. Kessans
- Biomolecular Interaction Centre and School of Biological Sciences, University of Canterbury, Private Bag 4800, Christchurch 8041, New Zealand
| | - Sarah C. Atkinson
- Department of Biochemistry and Molecular Biology, School of Biomedical Sciences, Monash University, Victoria, Australia
| | - Hironori Suzuki
- Biomolecular Interaction Centre and School of Biological Sciences, University of Canterbury, Private Bag 4800, Christchurch 8041, New Zealand
| | - Andrew J. A. Watson
- Department of Chemistry, University of Canterbury, Christchurch 8140, New Zealand
| | - Benjamin R. Burgess
- Department of Biochemistry and Molecular Biology, Bio21 Molecular Science and Biotechnology Institute, University of Melbourne, 30 Flemington Road, Parkville, Victoria 3010, Australia
| | - Lauren M. Angley
- Department of Biochemistry and Molecular Biology, Bio21 Molecular Science and Biotechnology Institute, University of Melbourne, 30 Flemington Road, Parkville, Victoria 3010, Australia
| | - André O. Hudson
- Thomas H. Gosnell School of Life Sciences, Rochester Institute of Technology, Rochester, NY 14623, USA
| | - Arvind Varsani
- Biomolecular Interaction Centre and School of Biological Sciences, University of Canterbury, Private Bag 4800, Christchurch 8041, New Zealand
- Electron Microscope Unit, University of Cape Town, Rondebosch, Cape Town 7701, South Africa
| | - Michael D. W. Griffin
- Department of Biochemistry and Molecular Biology, Bio21 Molecular Science and Biotechnology Institute, University of Melbourne, 30 Flemington Road, Parkville, Victoria 3010, Australia
| | - Antony J. Fairbanks
- Department of Chemistry, University of Canterbury, Christchurch 8140, New Zealand
| | - Renwick C. J. Dobson
- Biomolecular Interaction Centre and School of Biological Sciences, University of Canterbury, Private Bag 4800, Christchurch 8041, New Zealand
- Department of Biochemistry and Molecular Biology, Bio21 Molecular Science and Biotechnology Institute, University of Melbourne, 30 Flemington Road, Parkville, Victoria 3010, Australia
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330
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Kim JH, Resende R, Wennekes T, Chen HM, Bance N, Buchini S, Watts AG, Pilling P, Streltsov VA, Petric M, Liggins R, Barrett S, McKimm-Breschkin JL, Niikura M, Withers SG. Mechanism-based covalent neuraminidase inhibitors with broad-spectrum influenza antiviral activity. Science 2013; 340:71-5. [PMID: 23429702 DOI: 10.1126/science.1232552] [Citation(s) in RCA: 153] [Impact Index Per Article: 13.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Abstract
Influenza antiviral agents play important roles in modulating disease severity and in controlling pandemics while vaccines are prepared, but the development of resistance to agents like the commonly used neuraminidase inhibitor oseltamivir may limit their future utility. We report here on a new class of specific, mechanism-based anti-influenza drugs that function through the formation of a stabilized covalent intermediate in the influenza neuraminidase enzyme, and we confirm this mode of action with structural and mechanistic studies. These compounds function in cell-based assays and in animal models, with efficacies comparable to that of the neuraminidase inhibitor zanamivir and with broad-spectrum activity against drug-resistant strains in vitro. The similarity of their structure to that of the natural substrate and their mechanism-based design make these attractive antiviral candidates.
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Affiliation(s)
- Jin-Hyo Kim
- Department of Chemistry, University of British Columbia, 2036 Main Mall, Vancouver, British Columbia V6T 1Z1, Canada
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331
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Jiao R, Xu H, Cui J, Ge H, Tan R. Neuraminidase Inhibitors from marine-derived actinomycete Streptomyces seoulensis. J Appl Microbiol 2013; 114:1046-53. [DOI: 10.1111/jam.12136] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/10/2012] [Revised: 12/26/2012] [Accepted: 01/07/2013] [Indexed: 01/03/2023]
Affiliation(s)
- R.H. Jiao
- Institute of Functional Biomolecules; State Key Laboratory of Pharmaceutical Biotechnology; Nanjing University; Nanjing China
| | - H. Xu
- Institute of Functional Biomolecules; State Key Laboratory of Pharmaceutical Biotechnology; Nanjing University; Nanjing China
| | - J.T. Cui
- Institute of Functional Biomolecules; State Key Laboratory of Pharmaceutical Biotechnology; Nanjing University; Nanjing China
| | - H.M. Ge
- Institute of Functional Biomolecules; State Key Laboratory of Pharmaceutical Biotechnology; Nanjing University; Nanjing China
| | - R.X. Tan
- Institute of Functional Biomolecules; State Key Laboratory of Pharmaceutical Biotechnology; Nanjing University; Nanjing China
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332
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Nguyen AP, Downard KM. Subtyping of influenza neuraminidase using mass spectrometry. Analyst 2013; 138:1787-93. [PMID: 23370118 DOI: 10.1039/c3an00086a] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A proteotyping approach which employs high resolution mass spectrometry is shown to be able to differentiate all nine neuraminidase subtypes of type A influenza viruses that infect both humans and animals. Conserved sequences among tryptic peptides were identified through alignments of influenza neuraminidase sequences across all subtypes N1-N9 among human and animal hosts. Those that were unique in mass represent signature peptides which, when detected in the mass spectra of an influenza neuraminidase or whole virus digest, enable strains to be subtyped with confidence. The ability to distinguish N1 neuraminidase derived from human H5N1 and H1N1 strains is also demonstrated. The approach provides a more rapid and direct approach with which to subtype the virus than conventional molecular based PCR methods with comparable sensitivity. This should help facilitate a more rapid response in the event of a local epidemic or global pandemic.
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Affiliation(s)
- An P Nguyen
- School of Molecular Bioscience, University of Sydney, Sydney, NSW 2006, Australia
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333
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The ‘mirror-image’ postulate as a guide to the selection and evaluation of pyrrolidines as α-l-fucosidase inhibitors. Carbohydr Res 2013; 367:29-32. [DOI: 10.1016/j.carres.2012.11.011] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/18/2012] [Revised: 11/09/2012] [Accepted: 11/16/2012] [Indexed: 11/20/2022]
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334
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Chamni S, De-Eknamkul W. Recent progress and challenges in the discovery of new neuraminidase inhibitors. Expert Opin Ther Pat 2013; 23:409-23. [DOI: 10.1517/13543776.2013.765861] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/12/2023]
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335
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Rahman MM, Kitao S, Tsuji D, Suzuki K, Sakamoto JI, Matsuoka K, Matsuzawa F, Aikawa SI, Itoh K. Inhibitory effects and specificity of synthetic sialyldendrimers toward recombinant human cytosolic sialidase 2 (NEU2). Glycobiology 2013; 23:495-504. [DOI: 10.1093/glycob/cws221] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/28/2023] Open
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336
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Aoki Y, Tanimoto S, Takahashi D, Toshima K. Photodegradation and inhibition of drug-resistant influenza virus neuraminidase using anthraquinone-sialic acid hybrids. Chem Commun (Camb) 2013; 49:1169-71. [PMID: 23282898 DOI: 10.1039/c2cc38742e] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The anthraquinone-sialic acid hybrids designed effectively degraded not only non-drug-resistant neuraminidase but also drug-resistant neuraminidase, which is an important target of anti-influenza therapy. Degradation was achieved using long-wavelength UV radiation in the absence of any additives and under neutral conditions. Moreover, the hybrids efficiently inhibited neuraminidase activities upon photo-irradiation.
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Affiliation(s)
- Yusuke Aoki
- Department of Applied Chemistry, Faculty of Science and Technology, Keio University, 3-14-1 Hiyoshi, Yokohama 223-8522, Japan
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337
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Abstract
Chemical glycobiology is emerging as one of the most uniquely powerful sub-disciplines of chemical biology. The previous scarcity of chemical strategies and the unparalleled structural diversity have created a uniquely fertile ground that is both rich in challenges and potentially very profound in implications. Glycans (oligosaccharides, polysaccharides, and glycoconjugates) are everywhere in biological systems and yet remain disproportionately neglected - reviews highlighting this 'Cinderella status' abound. Yet, the last two decades have witnessed tremendous progress, notably in chemical and chemoenzymatic synthesis, 'sequencing' and arraying, metabolic engineering and imaging. These vital steps serve to highlight not only the great potential but just how much more remains to be done. The vast chemical and functional space of glycans remains to be truly explored. Top-down full-scale glycomic and glycoproteomic studies coupled with hypothesis-driven, bottom-up innovative chemical strategies will be required to properly realize the potential impact of glycoscience on human health, energy, and economy. In this review, we cherry-pick far-sighted advances and use these to identify possible challenges, opportunities and avenues in chemical glycobiology.
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Affiliation(s)
- Lai-Xi Wang
- Institute of Human Virology and Department of Biochemistry & Molecular Biology, University of Maryland School of Medicine, 725 W. Lombard Street, Baltimore, MD 21201, USA
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338
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Abstract
During the last 30 years, significant progress has been made in the development of novel antiviral drugs, mainly crystallizing in the establishment of potent antiretroviral therapies and the approval of drugs inhibiting hepatitis C virus replication. Although major targets of antiviral intervention involve intracellular processes required for the synthesis of viral proteins and nucleic acids, a number of inhibitors blocking virus assembly, budding, maturation, entry or uncoating act on virions or viral capsids. In this review, we focus on the drug discovery process while presenting the currently used methodologies to identify novel antiviral drugs by using a computer-based approach. We provide examples illustrating structure-based antiviral drug development, specifically neuraminidase inhibitors against influenza virus (e.g. oseltamivir and zanamivir) and human immunodeficiency virus type 1 protease inhibitors (i.e. the development of darunavir from early peptidomimetic compounds such as saquinavir). A number of drugs in preclinical development acting against picornaviruses, hepatitis B virus and human immunodeficiency virus and their mechanism of action are presented to show how viral capsids can be exploited as targets of antiviral therapy.
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Affiliation(s)
- Luis Menéndez-Arias
- Centro de Biología Molecular "Severo Ochoa" (Consejo Superior de Investigaciones Científicas & Universidad Autónoma de Madrid), c/Nicolás Cabrera 1, Campus de Cantoblanco, 28049, Madrid, Spain,
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339
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Bhatt B, Thomson RJ, von Itzstein M. Uronosyl phosphonate-based sialidase inhibitor synthesis and conformational analysis. Bioorg Med Chem Lett 2012; 22:7623-6. [PMID: 23122861 DOI: 10.1016/j.bmcl.2012.10.015] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/16/2012] [Accepted: 10/01/2012] [Indexed: 10/27/2022]
Abstract
With a view to development of novel sialidase inhibitors, mimetics of the natural inhibitor Neu5Ac2en have been prepared in which a phosphonate group replaces the sialic acid glycerol side chain. Different hex-4-en derivatives adopt half-chair conformations that place the glycosyl phosphonate in an equatorial position. For the α-L-threo-hex-4-en derivative this conformation is equivalent to that of Neu5Ac2en, and opposite to that seen for alkyl O-glycosides with the same overall stereochemistry.
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Affiliation(s)
- Beenu Bhatt
- Institute for Glycomics, Griffith University, Gold Coast Campus, Queensland 4222, Australia
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340
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Hütter J, Rödig JV, Höper D, Seeberger PH, Reichl U, Rapp E, Lepenies B. Toward animal cell culture-based influenza vaccine design: viral hemagglutinin N-glycosylation markedly impacts immunogenicity. THE JOURNAL OF IMMUNOLOGY 2012; 190:220-30. [PMID: 23225881 DOI: 10.4049/jimmunol.1201060] [Citation(s) in RCA: 49] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/27/2023]
Abstract
The glycoproteins hemagglutinin (HA) and neuraminidase are the major determinants of host range and tissue tropism of the influenza virus. HA is the most abundant protein in the virus particle membrane and represents the basis of most influenza vaccines. It has been reported that influenza virus HA N-glycosylation markedly depends on the host cell line used for virus production. However, little is known about how differential glycosylation affects immunogenicity of the viral proteins. This is of importance for virus propagation in chicken eggs as well as for innovative influenza vaccine production in mammalian cell lines. In this study, we investigated the impact of the differential N-glycosylation patterns of two influenza A virus PR/8/34 (H1N1) variants on immunogenicity. Madin-Darby canine kidney cell-derived and Vero cell-derived glycovariants were analyzed for immunogenicity in a TCR-HA transgenic mouse model. Next-generation pyrosequencing validated the congruence of the potential HA N-glycosylation sites as well as the presence of the HA peptide recognized by the TCR-HA transgenic T cells. We show that differential HA N-glycosylation markedly affected T cell activation and cytokine production in vitro and moderately influenced IL-2 production in vivo. Cocultivation assays indicated that the difference in immunogenicity was mediated by CD11c(+) dendritic cells. Native virus deglycosylation by endo- and exoglycosidases dramatically reduced cytokine production by splenocytes in vitro and markedly decreased HA-specific Ab production in vivo. In conclusion, this study indicates a crucial importance of HA N-glycosylation for immunogenicity. Our findings have implications for cell line-based influenza vaccine design.
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Affiliation(s)
- Julia Hütter
- Department of Biomolecular Systems, Max Planck Institute of Colloids and Interfaces, 14476 Potsdam, Germany
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341
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Grey JL, Thompson DH. Challenges and opportunities for new protein crystallization strategies in structure-based drug design. Expert Opin Drug Discov 2012; 5:1039-45. [PMID: 21116481 DOI: 10.1517/17460441.2010.515583] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
Structure-based drug design (SBDD) has emerged as a valuable pharmaceutical lead discovery tool, showing potential for accelerating the discovery process,while reducing developmental costs and boosting potencies of the drug that is ultimately selected. SBDD is an iterative, rational, lead compound sculpting process that involves both the synthesis of new derivatives and the evaluation of their binding to the target structure either through computational docking or elucidation of the target structure as a complex with the lead compound. This method heavily relies on the production of high resolution(< 2 Å) 3D structures of the drug target, obtained through X-ray crystallographic analysis, in the presence or absence of the drug candidate.The lack of generalized methods for high quality crystal production is still a major bottleneck in the process of macromolecular crystallization. This review provides a brief introduction to SBDD and describes several macromolecular crystallization strategies, with an emphasis on advances and challenges facing researchers in the field today. Recent trends in the development of more universal macromolecular crystallization techniques, particularly nucleation-based techniques that are applicable to both soluble and integral membrane proteins, are also discussed.
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Affiliation(s)
- Jessica Lynn Grey
- Purdue University, Department of Chemistry, West Lafayette, IN 47907, USA
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342
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Pandemic 2009 H1N1 influenza A virus carrying a Q136K mutation in the neuraminidase gene is resistant to zanamivir but exhibits reduced fitness in the guinea pig transmission model. J Virol 2012. [PMID: 23192869 DOI: 10.1128/jvi.02507-12] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022] Open
Abstract
Resistance of influenza A viruses to neuraminidase inhibitors can arise through mutations in the neuraminidase (NA) gene. We show here that a Q136K mutation in the NA of the 2009 pandemic H1N1 virus confers a high degree of resistance to zanamivir. Resistance is accompanied by reduced numbers of NA molecules in viral particles and reduced intrinsic enzymatic activity of mutant NA. Interestingly, the Q136K mutation strongly impairs viral fitness in the guinea pig transmission model.
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343
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Polymer-attached zanamivir inhibits synergistically both early and late stages of influenza virus infection. Proc Natl Acad Sci U S A 2012. [PMID: 23185023 DOI: 10.1073/pnas.1219155109] [Citation(s) in RCA: 42] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022] Open
Abstract
Covalently conjugating multiple copies of the drug zanamivir (ZA; the active ingredient in Relenza) via a flexible linker to poly-l-glutamine (PGN) enhances the anti-influenza virus activity by orders of magnitude. In this study, we investigated the mechanisms of this phenomenon. Like ZA itself, the PGN-attached drug (PGN-ZA) binds specifically to viral neuraminidase and inhibits both its enzymatic activity and the release of newly synthesized virions from infected cells. Unlike monomeric ZA, however, PGN-ZA also synergistically inhibits early stages of influenza virus infection, thus contributing to the markedly increased antiviral potency. This inhibition is not caused by a direct virucidal effect, aggregation of viruses, or inhibition of viral attachment to target cells and the subsequent endocytosis; rather, it is a result of interference with intracellular trafficking of the endocytosed viruses and the subsequent virus-endosome fusion. These findings both rationalize the great anti-influenza potency of PGN-ZA and reveal that attaching ZA to a polymeric chain confers a unique mechanism of antiviral action potentially useful for minimizing drug resistance.
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344
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Xie Y, Huang B, Yu K, Shi F, Xu W. Discovery of a series of novel compounds with moderate anti-avian H5N1 influenza virus activity in chick embryo. Med Chem Res 2012. [DOI: 10.1007/s00044-012-0341-2] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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345
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Mechanistic model for the synthesis of N-acetylneuraminic acid using N-acetylneuraminate lyase from Escherichia coli K12. ACTA ACUST UNITED AC 2012. [DOI: 10.1016/j.molcatb.2012.05.016] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/22/2023]
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346
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Winger M, von Itzstein M. Exposing the flexibility of human parainfluenza virus hemagglutinin-neuraminidase. J Am Chem Soc 2012; 134:18447-52. [PMID: 23057491 DOI: 10.1021/ja3084658] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Abstract
Human parainfluenza virus type 3 (hPIV-3) is a clinically significant pathogen and is the causative agent of pneumonia and bronchiolitis in children. In this study the solution dynamics of human parainfluenza type 3 hemagglutinin-neuraminidase (HN) have been investigated. A flexible loop around Asp216 that adopts an open conformation in direct vicinity of the active site of the apo-form of the protein and closes upon inhibitor binding has been identified. To date, no available X-ray crystal structure has shown the molecular dynamics simulation-derived predominant loop-conformation states found in the present study. The outcomes of this study provide additional insight into the dynamical properties of hPIV-3 HN and may have important implications in defining HN glycan recognition events, receptor specificity, and antiparainfluenza virus drug discovery.
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Affiliation(s)
- Moritz Winger
- Institute for Glycomics, Gold Coast Campus, Griffith University Queensland, 4222, Australia.
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347
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In silico biology of H1N1: molecular modelling of novel receptors and docking studies of inhibitors to reveal new insight in flu treatment. J Biomed Biotechnol 2012; 2012:714623. [PMID: 23125526 PMCID: PMC3483830 DOI: 10.1155/2012/714623] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/12/2012] [Revised: 05/16/2012] [Accepted: 06/11/2012] [Indexed: 11/29/2022] Open
Abstract
Influenza is an infectious disease caused by RNA viruses of the family Orthomyxoviridae. The new influenza H1N1 viral stain has emerged by the genetic combination of genes from human, pig, and bird's H1N1 virus. The influenza virus is roughly spherical and is enveloped by a lipid membrane. There are two glycoproteins in this lipid membrane; namely, hemagglutinin (HA) which helps in attachment of the viral strain on the host cell surface and neuraminidase (NA) that is responsible for initiation of viral infection. We have developed homology models of both Hemagglutinin and Neuraminidase receptors from H1N1 strains in eastern India. The docking studies of B-Sialic acid and O-Sialic acid in the optimized and energy-minimized homology models show important H-bonding interactions with ALA142, ASP230, GLN231, GLU232, and THR141. This information can be used for structure-based and pharmacophore-based new drug design. We have also calculated ADME properties (Human Oral Absorption (HOA) and % HOA) for Oseltamivir which have been subject of debate for long.
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348
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Hayakawa M, Toda N, Carrillo N, Thornburg NJ, Crowe JE, Barbas CF. A chemically programmed antibody is a long-lasting and potent inhibitor of influenza neuraminidase. Chembiochem 2012; 13:2191-5. [PMID: 22965667 PMCID: PMC3517015 DOI: 10.1002/cbic.201200439] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/28/2012] [Indexed: 11/10/2022]
Abstract
Programming an anti-flu strategy: A new and potent neuraminidase inhibitor that maintains long-term systemic exposure of an antibody and the therapeutic activity of the neuraminadase inhibitor zanamivir has been created. This strategy could provide a promising new class of influenza A drugs for therapy and prophylaxis, and validates enzyme inhibitors as programming agents in synthetic immunology.
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Affiliation(s)
- Masahiko Hayakawa
- Departments of Chemistry, Molecular Biology, and The Skaggs Institute for Chemical Biology, The Scripps Research Institute, 10550 North, Torrey Pines Road, La Jolla, CA 92037 (USA)
| | - Narihiro Toda
- Departments of Chemistry, Molecular Biology, and The Skaggs Institute for Chemical Biology, The Scripps Research Institute, 10550 North, Torrey Pines Road, La Jolla, CA 92037 (USA)
| | - Nancy Carrillo
- Departments of Chemistry, Molecular Biology, and The Skaggs Institute for Chemical Biology, The Scripps Research Institute, 10550 North, Torrey Pines Road, La Jolla, CA 92037 (USA)
| | - Natalie J. Thornburg
- Departments of Pediatrics, Pathology, Microbiology and Immunology, and Vanderbilt Vaccine Center, Vanderbilt University Medical Center, 11475 Medical Research Building IV - 2213 Garland Ave. Nashville, TN 37232-0417
| | - James E. Crowe
- Departments of Pediatrics, Pathology, Microbiology and Immunology, and Vanderbilt Vaccine Center, Vanderbilt University Medical Center, 11475 Medical Research Building IV - 2213 Garland Ave. Nashville, TN 37232-0417
| | - Carlos F. Barbas
- Departments of Chemistry, Molecular Biology, and The Skaggs Institute for Chemical Biology, The Scripps Research Institute, 10550 North, Torrey Pines Road, La Jolla, CA 92037 (USA)
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349
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Bhatt B, Böhm R, Kerry PS, Dyason JC, Russell RJM, Thomson RJ, von Itzstein M. Exploring the interactions of unsaturated glucuronides with influenza virus sialidase. J Med Chem 2012; 55:8963-8. [PMID: 23017008 DOI: 10.1021/jm301145k] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/21/2023]
Abstract
A series of C3 O-functionalized 2-acetamido-2-deoxy-Δ⁴-β-D-glucuronides were synthesized to explore noncharge interactions in subsite 2 of the influenza virus sialidase active site. In complex with A/N8 sialidase, the parent compound (C3 OH) inverts its solution conformation to bind with all substituents well positioned in the active site. The parent compound inhibits influenza virus sialidase at a sub-μM level; the introduction of small alkyl substituents or an acetyl group at C3 is also tolerated.
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Affiliation(s)
- Beenu Bhatt
- Institute for Glycomics, Gold Coast Campus, Griffith University, Queensland 4222, Australia
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350
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Vergara-Jaque A, Poblete H, Lee EH, Schulten K, González-Nilo F, Chipot C. Molecular Basis of Drug Resistance in A/H1N1 Virus. J Chem Inf Model 2012; 52:2650-6. [DOI: 10.1021/ci300343w] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
| | - Horacio Poblete
- Center for Bioinformatics and
Molecular Simulation, Universidad de Talca, Chile
| | - Eric H. Lee
- Beckman Institute, University of Illinois at Urbana−Champaign,
Urbana, United States
| | - Klaus Schulten
- Beckman Institute, University of Illinois at Urbana−Champaign,
Urbana, United States
| | - Fernando González-Nilo
- Universidad
Andres Bello, Center
for Bioinformatics and Integrative Biology, Santiago, Chile
- Centro Interdisciplinario de Neurociencias
de Valparaíso, Universidad de Valparaíso, Valparaíso, Chile
| | - Christophe Chipot
- Beckman Institute, University of Illinois at Urbana−Champaign,
Urbana, United States
- Equipe de Dynamique des Assemblages
Membranaires, UMR Centre National de la Recherche Scientifique/UHP
7565, Nancy Université BP 239, Nancy, France
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