Vpr, and Env/Vpu 2 Rnas
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Patent Document US 06872395
I 1111111111111111 11111 111111111111111 1111111111 1111111111 lll111111111111111 US006872395B2 (12) United States Patent (10) Patent No.: US 6,872,395 B2 Kawaoka (45) Date of Patent: Mar.29,2005 (54) VIRUSES COMPRISING MUTANT ION Mena, I., et al., "Rescue of a Synthetic Choramphenicol CHANNEL PROTEIN Acetyltransferase RNA into influenza Virus-Like Particles obtained from recombinant plasmids", J. of Virology, vol. (75) Inventor: Yoshihiro Kawaoka, Madison, WI 70, No. 8, XP002150091, 5016-5024, (Aug. 1996). (US) Neumann, G., et al., "Generation of influenza A Viruses entirely from cloned cDNAs", Proc. of the Nat'l Aca. of (73) Assignee: Wisconsin Alumni Research Sciences, USA, vol. 96, XP002150093, 9345-9350, (Aug. Foundation, Madison, WI (US) 1999). ( *) Notice: Subject to any disclaimer, the term of this Neumann, G., et al., "Plasmid-Driven Formation of Influ patent is extended or adjusted under 35 enza Virus-Like Particles", J. of Virology, vol. 74, No. 1, U.S.C. 154(b) by O days. XP002150094, 547-551, (Jan. 2000). Neumann, G., et al., "RNA Polymerase I-Mediated Expres sion of Influenza Viral RNA Molecules", Virology, vol. 202, (21) Appl. No.: 09/834,095 No. 1, XP000952667, 477-479, (Jul. 1994). (22) Filed: Apr. 12, 2001 Neirynck, S., et al., "A universal influenza A vaccine based on the extracellular domain of the M2 protein", Nature (65) Prior Publication Data Medicine, 5 (10), pp. 1157-1163, (Oct. 1999). US 2003/0194694 Al Oct. 16, 2003 Piller, S. C., et al., "Vpr protein of human immunodeficiency virus type 1 forms cation-selective channels in planar lipid Related U.S. Application Data bilayers", PNAS, 93, pp. -
Progressive Multifocal Leukoencephalopathy and the Spectrum of JC Virus-Related Disease
REVIEWS Progressive multifocal leukoencephalopathy and the spectrum of JC virus- related disease Irene Cortese 1 ✉ , Daniel S. Reich 2 and Avindra Nath3 Abstract | Progressive multifocal leukoencephalopathy (PML) is a devastating CNS infection caused by JC virus (JCV), a polyomavirus that commonly establishes persistent, asymptomatic infection in the general population. Emerging evidence that PML can be ameliorated with novel immunotherapeutic approaches calls for reassessment of PML pathophysiology and clinical course. PML results from JCV reactivation in the setting of impaired cellular immunity, and no antiviral therapies are available, so survival depends on reversal of the underlying immunosuppression. Antiretroviral therapies greatly reduce the risk of HIV-related PML, but many modern treatments for cancers, organ transplantation and chronic inflammatory disease cause immunosuppression that can be difficult to reverse. These treatments — most notably natalizumab for multiple sclerosis — have led to a surge of iatrogenic PML. The spectrum of presentations of JCV- related disease has evolved over time and may challenge current diagnostic criteria. Immunotherapeutic interventions, such as use of checkpoint inhibitors and adoptive T cell transfer, have shown promise but caution is needed in the management of immune reconstitution inflammatory syndrome, an exuberant immune response that can contribute to morbidity and death. Many people who survive PML are left with neurological sequelae and some with persistent, low-level viral replication in the CNS. As the number of people who survive PML increases, this lack of viral clearance could create challenges in the subsequent management of some underlying diseases. Progressive multifocal leukoencephalopathy (PML) is for multiple sclerosis. Taken together, HIV, lymphopro- a rare, debilitating and often fatal disease of the CNS liferative disease and multiple sclerosis account for the caused by JC virus (JCV). -
The Hepatitis C Virus P7 Protein Forms an Ion Channel That Is Inhibited by Long-Alkyl-Chain Iminosugar Derivatives
The hepatitis C virus p7 protein forms an ion channel that is inhibited by long-alkyl-chain iminosugar derivatives Davor Pavlovic´*, David C. A. Neville*, Olivier Argaud*, Baruch Blumberg†, Raymond A. Dwek*, Wolfgang B. Fischer*, and Nicole Zitzmann*‡ *Department of Biochemistry, University of Oxford, Oxford OX1 3QU, United Kingdom; and †Fox Chase Cancer Center, Philadelphia, PA 19111 Contributed by Baruch Blumberg, March 17, 2003 We show that hepatitis C virus (HCV) p7 protein forms ion channels data have been obtained by introducing mutations into an in black lipid membranes. HCV p7 ion channels are inhibited by infectious cDNA clone of BVDV. An in-frame deletion of the long-alkyl-chain iminosugar derivatives, which have antiviral ac- entire p7 does not affect RNA replication but leads to the tivity against the HCV surrogate bovine viral diarrhea virus. HCV p7 production of noninfectious virions. However, infective viral presents a potential target for antiviral therapy. particles can be generated by complementing p7 in trans (9), which suggests that the pestivirus p7 is essential for the epatitis C virus (HCV) is the major cause of chronic production of infective progeny virus. Interestingly, noninfec- Hhepatitis with a significant risk of end-stage liver cirrhosis tive BVDV particles also are created by treatment with and hepatocellular carcinoma (1). HCV belongs to the family long-alkyl-chain iminosugar derivatives (3). Flaviviridae, which consists of three genera: flaviviruses, pesti- Recently, HCV p7 has been shown to be a polytopic mem- viruses, and hepaciviruses. In the absence of both a suitable small brane protein that crosses the membrane twice and has its N and animal model and a reliable in vitro infectivity assay for HCV, C termini oriented toward the extracellular environment (10). -
Investigation of Proton Conductance in the Matrix 2 Protein of the Influenza Virus by Solution NMR Spectroscopy © Daniel Turman
Investigation of proton conductance in the matrix 2 protein of the influenza virus by solution NMR spectroscopy © Daniel Turman Emmanuel College Class 0[2012 Abstract The Influenza Matrix 2 (M2) protein is a homo-tetrameric integral membrane protein that forms a proton selective transmembrane channell Its recognized function is to equilibrate pH across the viral envelope following endocytosis and across the trans-golgi membrane during viral maturation2 Its function is vital for viral infection and proliferation but the mechanism and selectivity of proton conductance is not well understood. Mutagenesis studies have identified histidine 37 as the pH sensing element and tryptophan 41 as the gating selectivity filter3 This study uses solution nuclear magnetic resonance spectroscopy and an M2 transmembrane protein construct to elucidate key interactions between the aromatic residues believed to confer proton selectivity and pH dependent conduction of M2 in the low pH open and high pH closed states. PH dependent 13 C_1 H HSQC-Trosy experiments were completed in the pH range of 8.0 - 4.0 and the 13 C, and 13 Co2 chemical shift perturbations of histidine 37 revealed multiple saturation points. The protonation states of histidine 37 suggest a shuttling mechanism for proton conduction. Introduction Influenza is a pathogenic virus that has reached pandemic status four times in the twentieth century. The latest pandemic occurred in 2009 from the influenza A HINI strain (figure 1t The World Health Organization (WHO) commented in July of 2009, "this outbreak is unstoppable." Following this event, significant research has been allocated to understand all aspects of the influenza virus in an effort to produce effective vaccines and medications to prevent and control another pandemic. -
Lentivirus and Lentiviral Vectors Fact Sheet
Lentivirus and Lentiviral Vectors Family: Retroviridae Genus: Lentivirus Enveloped Size: ~ 80 - 120 nm in diameter Genome: Two copies of positive-sense ssRNA inside a conical capsid Risk Group: 2 Lentivirus Characteristics Lentivirus (lente-, latin for “slow”) is a group of retroviruses characterized for a long incubation period. They are classified into five serogroups according to the vertebrate hosts they infect: bovine, equine, feline, ovine/caprine and primate. Some examples of lentiviruses are Human (HIV), Simian (SIV) and Feline (FIV) Immunodeficiency Viruses. Lentiviruses can deliver large amounts of genetic information into the DNA of host cells and can integrate in both dividing and non- dividing cells. The viral genome is passed onto daughter cells during division, making it one of the most efficient gene delivery vectors. Most lentiviral vectors are based on the Human Immunodeficiency Virus (HIV), which will be used as a model of lentiviral vector in this fact sheet. Structure of the HIV Virus The structure of HIV is different from that of other retroviruses. HIV is roughly spherical with a diameter of ~120 nm. HIV is composed of two copies of positive ssRNA that code for nine genes enclosed by a conical capsid containing 2,000 copies of the p24 protein. The ssRNA is tightly bound to nucleocapsid proteins, p7, and enzymes needed for the development of the virion: reverse transcriptase (RT), proteases (PR), ribonuclease and integrase (IN). A matrix composed of p17 surrounds the capsid ensuring the integrity of the virion. This, in turn, is surrounded by an envelope composed of two layers of phospholipids taken from the membrane of a human cell when a newly formed virus particle buds from the cell. -
Respiratory Syncytial Virus and Coronaviruses
Chapter 3 Structural and Functional Aspects of Viroporins in Human Respiratory Viruses: Respiratory Syncytial Virus and Coronaviruses Wahyu Surya, Montserrat Samsó and Jaume Torres Additional information is available at the end of the chapter http://dx.doi.org/10.5772/53957 1. Introduction Viroporins are an increasingly recognized class of small viral membrane proteins (~60-120 amino acids) which oligomerize to produce hydrophilic pores at the membranes of virus- infected cells [1]. The existence of ‘viroporins’ was proposed more than 30 years ago after observing enhanced membrane permeability in infected cells [2]. These proteins form oligomers of defined size, and can act as proton or ion channels, and in general enhancing membrane permeability in the host [3]. Even though viroporins are not essential for the rep‐ lication of viruses, their absence results in attenuated or weakened viruses or changes in tropism (organ localization) and therefore diminished pathological effects [4, 5]. In addition to having one – sometimes two – α-helical transmembrane (TM) domain(s), viro‐ porins usually contain additional extramembrane regions that are able to make contacts with viral or host proteins. Indeed, the network of interactions of viroporins with other viral or cellular proteins is key to understand the regulation of viral protein trafficking through the vesicle system, viral morphogenesis and pathogenicity. In general, viroporins participate in the entry or release of viral particles into or out of cells, and membrane permeabilization may be a desirable functionality for the virus. Indeed, sev‐ eral viral proteins that are not viroporins are known to affect membrane permeabilization, e.g., A38L protein of vaccinia virus, a 33-kDa glycoprotein that allows Ca2+ influx and indu‐ ces necrosis in infected cells [6]. -
Vpr Mediates Immune Evasion and HIV-1 Spread by David R. Collins A
Vpr mediates immune evasion and HIV-1 spread by David R. Collins A dissertation submitted in partial fulfillment of the requirements for the degree of Doctor of Philosophy (Microbiology and Immunology) in the University of Michigan 2015 Doctoral Committee: Professor Kathleen L. Collins, Chair Professor David M. Markovitz Associate Professor Akira Ono Professor Alice Telesnitsky © David R. Collins ________________________________ All Rights Reserved 2015 Dedication In loving memory of Sullivan James and Aiko Rin ii Acknowledgements I am very grateful to my mentor, Dr. Kathleen L. Collins, for providing excellent scientific training and guidance and for directing very exciting and important research. I am in the debt of my fellow Collins laboratory members, present and former, for their daily support, encouragement and assistance. In particular, I am thankful to Dr. Michael Mashiba for pioneering our laboratory’s investigation of Vpr, which laid the framework for this dissertation, and for key contributions to Chapter II and Appendix. I am grateful to Jay Lubow and Dr. Zana Lukic for their collaboration and contributions to ongoing work related to this dissertation. I also thank the members of my thesis committee, Dr. Akira Ono, Dr. Alice Telesnitsky, and Dr. David Markovitz for their scientific and professional guidance. Finally, this work would not have been possible without the unwavering love and support of my family, especially my wife Kali and our wonderful feline companions Ayumi, Sully and Aiko, for whom I continue to endure life’s -
The Expression and Distribution of Insertionally Polymorphic Endogenous Retroviruses in Canine Cancer Derived Cell Lines
THE EXPRESSION AND DISTRIBUTION OF INSERTIONALLY POLYMORPHIC ENDOGENOUS RETROVIRUSES IN CANINE CANCER DERIVED CELL LINES. Abigail S. Jarosz A Thesis Submitted to the Graduate College of Bowling Green State University in partial fulfillment of the requirements for the degree of MASTER OF SCIENCE August 2018 Committee: Julia Halo-Wildschutte, Advisor Raymond Larsen Zhaohui Xu © 2018 Abigail S. Jarosz All Rights Reserved iii ABSTRACT Julia Halo-Wildschutte, Advisor To our knowledge there are no current infectious retroviruses found in canines or wild canids. It has been previously thought that the canine reference genome consists only of about 0.15% of sequence of obvious retroviral origin, present as endogenous retroviruses (ERVs) within contemporary canids. In recent analyses of the canine reference genome, a few copies of ERVs were identified with features characteristic of recent integration, for example the presence of some ORFs and near-identical LTRs. Members of this group are referred to as CfERV-Fc1(a) and have been identified to have sequence similarity to the mammalian ERV-Fc/W groups. We have recently discovered and characterized a number of non-reference Fc1 copies in dogs and wild canids, and identified unexpectedly high levels of polymorphism among members of this ERV group. Some of the proviruses we have identified even possess complete or nearly intact open reading frames, identical LTRs, and derived phylogenetic clustering among other CfERV-Fc1(a) members. Based on LTR sequence divergence under an applied dog neutral mutation rate, it is thought these infections occurred within as recently as the last ~0.48 million years. There have been previous, but unsubstantiated, reports of reverse transcriptase activity as well as gamma-type C particles in tumor tissues of canines diagnosed with lymphoma. -
Influenza Virus M2 Protein Ion Channel Activity Helps to Maintain Pandemic 2009 H1N1 Virus Hemagglutinin Fusion Competence Durin
Influenza Virus M2 Protein Ion Channel Activity Helps To Maintain Pandemic 2009 H1N1 Virus Hemagglutinin Fusion Competence during Transport to the Cell Surface Esmeralda Alvarado-Facundo,a,b Yamei Gao,a Rosa María Ribas-Aparicio,b Alicia Jiménez-Alberto,b Carol D. Weiss,a Wei Wanga Division of Viral Products, Center for Biologics Evaluation and Research, U.S. Food and Drug Administration, Silver Spring, Maryland, USAa; Departamento de Microbiología, Escuela Nacional de Ciencias Biológicas, Instituto Politécnico Nacional, Mexico City, Mexicob ABSTRACT The influenza virus hemagglutinin (HA) envelope protein mediates virus entry by first binding to cell surface receptors and then fusing viral and endosomal membranes during endocytosis. Cleavage of the HA precursor (HA0) into a surface receptor-binding Downloaded from subunit (HA1) and a fusion-inducing transmembrane subunit (HA2) by host cell enzymes primes HA for fusion competence by repositioning the fusion peptide to the newly created N terminus of HA2. We previously reported that the influenza virus M2 protein enhances pandemic 2009 influenza A virus [(H1N1)pdm09] HA-pseudovirus infectivity, but the mechanism was unclear. In this study, using cell-cell fusion and HA-pseudovirus infectivity assays, we found that the ion channel function of M2 was re- quired for enhancement of HA fusion and HA-pseudovirus infectivity. The M2 activity was needed only during HA biosynthesis, and proteolysis experiments indicated that M2 proton channel activity helped to protect (H1N1)pdm09 HA from premature conformational changes as it traversed low-pH compartments during transport to the cell surface. While M2 has previously been shown to protect avian influenza virus HA proteins of the H5 and H7 subtypes that have polybasic cleavage motifs, this study demonstrates that M2 can protect HA proteins from human H1N1 strains that lack a polybasic cleavage motif. -
(HERV-K) Viral Env RNA in Pancreatic Cancer Cells Decreases Cell
Published OnlineFirst July 5, 2017; DOI: 10.1158/1078-0432.CCR-17-0001 Cancer Therapy: Preclinical Clinical Cancer Research Downregulation of Human Endogenous Retrovirus Type K (HERV-K) Viral env RNA in Pancreatic Cancer Cells Decreases Cell Proliferation and Tumor Growth Ming Li1, Laszlo Radvanyi2, Bingnan Yin3, Kiera Rycaj4, Jia Li1, Raghavender Chivukula1, Kevin Lin4, Yue Lu4, JianJun Shen4, David Z. Chang5, Donghui Li6, Gary L. Johanning1, and Feng Wang-Johanning1 Abstract Purpose: We investigated the role of the human endogenous lines were significantly reduced after HERV-K KD by shRNA retrovirus type K (HERV-K) envelope (env) gene in pancreatic targeting HERV-K env, and there was reduced metastasis to cancer. lung after treatment. RNA-Seq results revealed changes in gene Experimental Design: shRNA was employed to knockdown expression after HERV-K env KD, including RAS and TP53. (KD) the expression of HERV-K in pancreatic cancer cells. Furthermore, downregulation of HERV-K Env protein expres- Results: HERV-K env expression was detected in seven pan- sion by shRNA also resulted in decreased expression of RAS, creatic cancer cell lines and in 80% of pancreatic cancer patient p-ERK, p-RSK, and p-AKT in several pancreatic cancer cells biopsies, but not in two normal pancreatic cell lines or or tumors. uninvolved normal tissues. A new HERV-K splice variant was Conclusions: These results demonstrate that HERV-K influ- discovered in several pancreatic cancer cell lines. Reverse ences signal transduction via the RAS–ERK–RSK pathway in transcriptase activity and virus-like particles were observed in pancreatic cancer. Our data highlight the potentially important culture media supernatant obtained from Panc-1 and Panc-2 role of HERV-K in tumorigenesis and progression of pancreatic cells. -
HIV-1 Env Gp41 Transmembrane Domain Dynamics Are Modulated by Lipid, Wa- Ter, and Ion Interactions
bioRxiv preprint doi: https://doi.org/10.1101/292326; this version posted March 30, 2018. The copyright holder for this preprint (which was not certified by peer review) is the author/funder, who has granted bioRxiv a license to display the preprint in perpetuity. It is made available under aCC-BY 4.0 International license. HIV-1 Env gp41 Transmembrane Domain Dynamics are Modulated by Lipid, Wa- ter, and Ion Interactions L.R. Hollingsworth IV, J.A. Lemkul, D.R. Bevan, and A.M. Brown Running Title: gp41 trimer dynamics in a lipid membrane Keywords: molecular dynamics simulations, protein-membrane interactions, HIV-1 gp41, envelope glycoprotein 1 bioRxiv preprint doi: https://doi.org/10.1101/292326; this version posted March 30, 2018. The copyright holder for this preprint (which was not certified by peer review) is the author/funder, who has granted bioRxiv a license to display the preprint in perpetuity. It is made available under aCC-BY 4.0 International license. Abstract The gp41 transmembrane domain (TMD) of the envelope glycoprotein (Env) of the human immunodeficiency virus (HIV) modulates the conformation of the viral enve- lope spike, the only druggable target on the surface of the virion. Understanding of TMD dynamics is needed to better probe and target Env with small molecule and antibody therapies. However, little is known about TMD dynamics due to difficulties in describing native membrane properties. Here, we performed atomistic molecular dynamics simula- tions of a trimeric, prefusion TMD in a model, asymmetric viral membrane that mimics the native viral envelope. We found that water and chloride ions permeated the mem- brane and interacted with the highly conserved arginine bundle, (R696)3, at the center of the membrane and influenced TMD stability by creating a network of hydrogen bonds and electrostatic interactions. -
Evidence for Its Involvement in Viral DNA Replication
View metadata, citation and similar papers at core.ac.uk brought to you by CORE provided by Elsevier - Publisher Connector Virology 433 (2012) 12–26 Contents lists available at SciVerse ScienceDirect Virology journal homepage: www.elsevier.com/locate/yviro JC virus agnoprotein enhances large T antigen binding to the origin of viral DNA replication: Evidence for its involvement in viral DNA replication A. Sami Saribas, Martyn K. White, Mahmut Safak n Department of Neuroscience, Laboratory of Molecular Neurovirology, Temple University School of Medicine, 3500 N. Broad Street, Philadelphia, PA 19140, United States article info abstract Article history: Agnoprotein is required for the successful completion of the JC virus (JCV) life cycle and was previously Received 12 April 2012 shown to interact with JCV large T-antigen (LT-Ag). Here, we further characterized agnoprotein’s Returned to author for revisions involvement in viral DNA replication. Agnoprotein enhances the DNA binding activity of LT-Ag to the viral 25 May 2012 origin (Ori) without directly interacting with DNA. The predicted amphipathic a-helix of agnoprotein plays Accepted 11 June 2012 a major role in this enhancement. All three phenylalanine (Phe) residues of agnoprotein localize to this Available online 27 July 2012 a-helix and Phe residues in general are known to play critical roles in protein–protein interaction, protein Keywords: folding and stability. The functional relevance of all Phe residues was investigated by mutagenesis. When Polyomavirus JC all were mutated to alanine (Ala), the mutant virus (F31AF35AF39A) replicated significantly less efficiently SV40 than each individual Phe mutant virus alone, indicating the importance of Phe residues for agnoprotein BKV function.