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The C-Terminal Domain of RNase H and the C-Terminus Amino Acid Residue Regulate Virus Release and Autoprocessing of a Defective HIV-1 Possessing M50I and V151I Changes in Integrase. Viruses 2022; 14:v14122687. [PMID: 36560691 PMCID: PMC9788298 DOI: 10.3390/v14122687] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/19/2022] [Revised: 11/17/2022] [Accepted: 11/28/2022] [Indexed: 12/05/2022] Open
Abstract
Previously, we reported that an HIV-1 variant containing Met-to-Ile change at codon 50 and Val-to-Ile mutation at codon 151 of integrase (IN), HIV(IN:M50I/V151I), was an impaired virus. Despite the mutations being in IN, the virus release was significantly suppressed (p < 0.0001) and the initiation of autoprocessing was inhibited; the mechanism of the defect remains unknown. In the current study, we attempted to identify the critical domains or amino acid (aa) residue(s) that promote defects in HIV(IN:M50I/V151I), using a series of variants, including truncated or aa-substituted RNase H (RH) or IN. The results demonstrated that virus release and the initiation of autoprocessing were regulated by the C-terminal domains (CTDs) of RH and IN. Further studies illustrated that Asp at codon 109 of RH CTD and Asp at the C terminus of IN induces the defect. This result indicated that the CTDs of RH and IN in GagPol and particular aa positions in RH and IN regulated the virus release and the initiation of autoprocessing, and these sites could be potential targets for the development of new therapies.
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2
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Siarot L, Chutiwitoonchai N, Sato H, Chang H, Sato H, Fujino M, Murakami T, Aono T, Kodama E, Kuroda K, Takei M, Aida Y. Identification of human immunodeficiency virus type-1 Gag-TSG101 interaction inhibitors by high-throughput screening. Biochem Biophys Res Commun 2018; 503:2970-2976. [PMID: 30126636 DOI: 10.1016/j.bbrc.2018.08.079] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/24/2018] [Accepted: 08/08/2018] [Indexed: 01/28/2023]
Abstract
The interaction between viral protein Gag and cellular protein tumor susceptibility gene 101 (TSG101) is a crucial step in the HIV-1 replication cycle. This interaction initiates the viral assembly/budding via the cellular endosomal sorting complexes required for transport (ESCRT) pathway, making it a potential target for antiviral therapy. Here we developed a simple, robust, and reliable high-throughput screening (HTS) system based on enzyme-linked immunosorbent assay (ELISA) to identify compounds that inhibit HIV-1 replication by targeting Gag-TSG101 interaction. Through screening of the 9600-compound library using the established HTS system, several hit compounds, which inhibited Gag-TSG101 interaction, were identified. Subsequent assays revealed two hit compounds, HSM-9 and HSM-10, which have antiviral activity against CD4+ T cell-tropic NL4-3 and macrophage-tropic JR-CSF HIV-1 strains. These results suggest that our established HTS system is an indispensable tool for the identification of HIV-1 Gag-TSG101 interaction inhibitors.
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Affiliation(s)
- Lowela Siarot
- Nano Medical Engineering Laboratory, RIKEN Cluster for Pioneering Research, 2-1 Hirosawa, Wako, Saitama 3510198, Japan; Viral Infectious Diseases Unit, RIKEN, 2-1 Hirosawa, Wako, Saitama 3510198, Japan; Biotechnology Research Center, The University of Tokyo, Tokyo, Japan
| | - Nopporn Chutiwitoonchai
- Nano Medical Engineering Laboratory, RIKEN Cluster for Pioneering Research, 2-1 Hirosawa, Wako, Saitama 3510198, Japan; Viral Infectious Diseases Unit, RIKEN, 2-1 Hirosawa, Wako, Saitama 3510198, Japan
| | - Hirotaka Sato
- Nano Medical Engineering Laboratory, RIKEN Cluster for Pioneering Research, 2-1 Hirosawa, Wako, Saitama 3510198, Japan; Viral Infectious Diseases Unit, RIKEN, 2-1 Hirosawa, Wako, Saitama 3510198, Japan
| | - Hao Chang
- Nano Medical Engineering Laboratory, RIKEN Cluster for Pioneering Research, 2-1 Hirosawa, Wako, Saitama 3510198, Japan; Viral Infectious Diseases Unit, RIKEN, 2-1 Hirosawa, Wako, Saitama 3510198, Japan; Laboratory of Viral Infectious Diseases, Department of Medical Genome Sciences, Graduate School of Frontier Sciences, The University of Tokyo, Saitama, Japan
| | - Hironori Sato
- Laboratory of Viral Genomics, Pathogen Genomics Center, National Institute of Infectious Diseases, Tokyo, Japan
| | - Masayuki Fujino
- AIDS Research Center, National Institute of Infectious Diseases, Tokyo, Japan
| | - Tsutomu Murakami
- AIDS Research Center, National Institute of Infectious Diseases, Tokyo, Japan
| | - Toshihiro Aono
- Biotechnology Research Center, The University of Tokyo, Tokyo, Japan
| | - Eiichi Kodama
- Division of Infectious Diseases, International Institute of Disaster Science, and Tohoku Medical Megabank Organization, Tohoku University, Miyagi, Japan
| | | | - Masami Takei
- Nihon University School of Medicine, Tokyo, Japan
| | - Yoko Aida
- Nano Medical Engineering Laboratory, RIKEN Cluster for Pioneering Research, 2-1 Hirosawa, Wako, Saitama 3510198, Japan; Viral Infectious Diseases Unit, RIKEN, 2-1 Hirosawa, Wako, Saitama 3510198, Japan; Laboratory of Viral Infectious Diseases, Department of Medical Genome Sciences, Graduate School of Frontier Sciences, The University of Tokyo, Saitama, Japan.
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3
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Strickland M, Ehrlich LS, Watanabe S, Khan M, Strub MP, Luan CH, Powell MD, Leis J, Tjandra N, Carter CA. Tsg101 chaperone function revealed by HIV-1 assembly inhibitors. Nat Commun 2017; 8:1391. [PMID: 29123089 PMCID: PMC5680296 DOI: 10.1038/s41467-017-01426-2] [Citation(s) in RCA: 31] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/17/2016] [Accepted: 09/15/2017] [Indexed: 01/08/2023] Open
Abstract
HIV-1 replication requires Tsg101, a component of cellular endosomal sorting complex required for transport (ESCRT) machinery. Tsg101 possesses an ubiquitin (Ub) E2 variant (UEV) domain with a pocket that can bind PT/SAP motifs and another pocket that can bind Ub. The PTAP motif in the viral structural precursor polyprotein, Gag, allows the recruitment of Tsg101 and other ESCRTs to virus assembly sites where they mediate budding. It is not known how or even whether the UEV Ub binding function contributes to virus production. Here, we report that disruption of UEV Ub binding by commonly used drugs arrests assembly at an early step distinct from the late stage involving PTAP binding disruption. NMR reveals that the drugs form a covalent adduct near the Ub-binding pocket leading to the disruption of Ub, but not PTAP binding. We conclude that the Ub-binding pocket has a chaperone function involved in bud initiation.
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Affiliation(s)
- Madeleine Strickland
- Laboratory of Molecular Biophysics, Biochemistry and Biophysics Center, National Heart, Lung and Blood Institute, National Institutes of Health, Bethesda, MD, 20892, USA
| | - Lorna S Ehrlich
- Department of Molecular Genetics & Microbiology, School of Medicine, Stony Brook University, Stony Brook, NY, 11794-5222, USA
| | - Susan Watanabe
- Department of Molecular Genetics & Microbiology, School of Medicine, Stony Brook University, Stony Brook, NY, 11794-5222, USA
| | - Mahfuz Khan
- Department of Microbiology and Immunology, Morehouse School of Medicine, Atlanta, GA, 30310, USA
| | - Marie-Paule Strub
- Laboratory of Molecular Biophysics, Biochemistry and Biophysics Center, National Heart, Lung and Blood Institute, National Institutes of Health, Bethesda, MD, 20892, USA
| | - Chi-Hao Luan
- High Throughput Analysis Laboratory and Department of Molecular Biosciences, Northwestern University, Evanston, IL, 60208, USA
| | - Michael D Powell
- Department of Microbiology and Immunology, Morehouse School of Medicine, Atlanta, GA, 30310, USA
| | - Jonathan Leis
- Department of Microbiology and Immunology, Feinberg School of Medicine, Northwestern University, Chicago, IL, 60611, USA
| | - Nico Tjandra
- Laboratory of Molecular Biophysics, Biochemistry and Biophysics Center, National Heart, Lung and Blood Institute, National Institutes of Health, Bethesda, MD, 20892, USA.
| | - Carol A Carter
- Department of Molecular Genetics & Microbiology, School of Medicine, Stony Brook University, Stony Brook, NY, 11794-5222, USA.
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Faivre-Moskalenko C, Bernaud J, Thomas A, Tartour K, Beck Y, Iazykov M, Danial J, Lourdin M, Muriaux D, Castelnovo M. RNA control of HIV-1 particle size polydispersity. PLoS One 2014; 9:e83874. [PMID: 24475027 PMCID: PMC3901647 DOI: 10.1371/journal.pone.0083874] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/13/2013] [Accepted: 11/10/2013] [Indexed: 11/23/2022] Open
Abstract
HIV-1, an enveloped RNA virus, produces viral particles that are known to be much more heterogeneous in size than is typical of non-enveloped viruses. We present here a novel strategy to study HIV-1 Viral Like Particles (VLP) assembly by measuring the size distribution of these purified VLPs and subsequent viral cores thanks to Atomic Force Microscopy imaging and statistical analysis. This strategy allowed us to identify whether the presence of viral RNA acts as a modulator for VLPs and cores size heterogeneity in a large population of particles. These results are analyzed in the light of a recently proposed statistical physics model for the self-assembly process. In particular, our results reveal that the modulation of size distribution by the presence of viral RNA is qualitatively reproduced, suggesting therefore an entropic origin for the modulation of RNA uptake by the nascent VLP.
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Affiliation(s)
| | - Julien Bernaud
- Université de Lyon, Laboratoire de Physique, Ecole Normale Supérieure de Lyon, CNRS, Lyon, France
| | - Audrey Thomas
- CNRS UMR 5236, Centre d'études d'agents Pathogènes et Biotechnologies pour la Santé, Montpellier, France ; Université de Lyon, INSERM, U758, Ecole Normale Supérieure de Lyon, Lyon, France
| | - Kevin Tartour
- Université de Lyon, INSERM, U758, Ecole Normale Supérieure de Lyon, Lyon, France
| | - Yvonne Beck
- Université de Lyon, Laboratoire de Physique, Ecole Normale Supérieure de Lyon, CNRS, Lyon, France
| | - Maksym Iazykov
- Université de Lyon, Laboratoire de Physique, Ecole Normale Supérieure de Lyon, CNRS, Lyon, France
| | - John Danial
- Université de Lyon, Laboratoire de Physique, Ecole Normale Supérieure de Lyon, CNRS, Lyon, France
| | - Morgane Lourdin
- Université de Lyon, INSERM, U758, Ecole Normale Supérieure de Lyon, Lyon, France
| | - Delphine Muriaux
- CNRS UMR 5236, Centre d'études d'agents Pathogènes et Biotechnologies pour la Santé, Montpellier, France ; Université de Lyon, INSERM, U758, Ecole Normale Supérieure de Lyon, Lyon, France
| | - Martin Castelnovo
- Université de Lyon, Laboratoire de Physique, Ecole Normale Supérieure de Lyon, CNRS, Lyon, France
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Bell NM, Lever AML. HIV Gag polyprotein: processing and early viral particle assembly. Trends Microbiol 2013; 21:136-44. [PMID: 23266279 DOI: 10.1016/j.tim.2012.11.006] [Citation(s) in RCA: 150] [Impact Index Per Article: 13.6] [Reference Citation Analysis] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/05/2012] [Revised: 11/22/2012] [Accepted: 11/29/2012] [Indexed: 12/22/2022]
Affiliation(s)
- Neil M Bell
- Department of Medicine, University of Cambridge, Level 5, Addenbrooke's Hospital, Hills Road, Cambridge CB2 2QQ, UK
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Morita E, Arii J, Christensen D, Votteler J, Sundquist WI. Attenuated protein expression vectors for use in siRNA rescue experiments. Biotechniques 2012; 0:1-5. [PMID: 22877307 PMCID: PMC3759224 DOI: 10.2144/000113909] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/15/2012] [Accepted: 07/13/2012] [Indexed: 11/23/2022] Open
Abstract
Transient transfection of small interfering RNA (siRNA) provides a powerful approach for studying cellular protein functions, particularly when the target protein can be re-expressed from an exogenous siRNA-resistant construct in order to rescue the knockdown phenotype, confirm siRNA target specificity, and support mutational analyses. Rescue experiments often fail, however, when siRNA-resistant constructs are expressed at suboptimal levels. Here, we describe an ensemble of mammalian protein expression vectors with CMV promoters of differing strengths. Using CHMP2A rescue of HIV-1 budding, we show that these vectors can combine high-transfection efficiencies with tunable protein expression levels to optimize the rescue of cellular phenotypes induced by siRNA transfection.
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Affiliation(s)
- Eiji Morita
- Department of Biochemistry, University of Utah School of Medicine, Salt Lake City, UT, USA
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HIV Assembly and Budding: Ca(2+) Signaling and Non-ESCRT Proteins Set the Stage. Mol Biol Int 2012; 2012:851670. [PMID: 22761998 PMCID: PMC3384956 DOI: 10.1155/2012/851670] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/31/2012] [Accepted: 03/26/2012] [Indexed: 12/16/2022] Open
Abstract
More than a decade has elapsed since the link between the endosomal sorting complex required for transport (ESCRT) machinery and HIV-1 protein trafficking and budding was first identified. L domains in HIV-1 Gag mediate recruitment of ESCRT which function in bud abscission releasing the viral particle from the host cell. Beyond virus budding, the ESCRT machinery is also involved in the endocytic pathway, cytokinesis, and autophagy. In the past few years, the number of non-ESCRT host proteins shown to be required in the assembly process has also grown. In this paper, we highlight the role of recently identified cellular factors that link ESCRT machinery to calcium signaling machinery and we suggest that this liaison contributes to setting the stage for productive ESCRT recruitment and mediation of abscission. Parallel paradigms for non-ESCRT roles in virus budding and cytokinesis will be discussed.
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Mu R, Dussupt V, Jiang J, Sette P, Rudd V, Chuenchor W, Bello NF, Bouamr F, Xiao TS. Two distinct binding modes define the interaction of Brox with the C-terminal tails of CHMP5 and CHMP4B. Structure 2012; 20:887-98. [PMID: 22484091 PMCID: PMC3350598 DOI: 10.1016/j.str.2012.03.001] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/16/2011] [Revised: 02/18/2012] [Accepted: 03/11/2012] [Indexed: 01/07/2023]
Abstract
Interactions of the CHMP protein carboxyl terminal tails with effector proteins play important roles in retroviral budding, cytokinesis, and multivesicular body biogenesis. Here we demonstrate that hydrophobic residues at the CHMP4B C-terminal amphipathic α helix bind a concave surface of Brox, a mammalian paralog of Alix. Unexpectedly, CHMP5 was also found to bind Brox and specifically recruit endogenous Brox to detergent-resistant membrane fractions through its C-terminal 20 residues. Instead of an α helix, the CHMP5 C-terminal tail adopts a tandem β-hairpin structure that binds Brox at the same site as CHMP4B. Additional Brox:CHMP5 interface is furnished by a unique CHMP5 hydrophobic pocket engaging the Brox residue Y348 that is not conserved among the Bro1 domains. Our studies thus unveil a β-hairpin conformation of the CHMP5 protein C-terminal tail, and provide insights into the overlapping but distinct binding profiles of ESCRT-III and the Bro1 domain proteins.
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Affiliation(s)
- Ruiling Mu
- Laboratory of Immunology, National Institute of Allergy and Infectious Diseases, NIH, Bethesda, MD 20892
| | - Vincent Dussupt
- Laboratory of Molecular Microbiology, National Institute of Allergy and Infectious Diseases, NIH, Bethesda, MD 20892
| | - Jiansheng Jiang
- Laboratory of Immunology, National Institute of Allergy and Infectious Diseases, NIH, Bethesda, MD 20892
| | - Paola Sette
- Laboratory of Molecular Microbiology, National Institute of Allergy and Infectious Diseases, NIH, Bethesda, MD 20892
| | - Victoria Rudd
- Laboratory of Molecular Microbiology, National Institute of Allergy and Infectious Diseases, NIH, Bethesda, MD 20892
| | - Watchalee Chuenchor
- Laboratory of Immunology, National Institute of Allergy and Infectious Diseases, NIH, Bethesda, MD 20892
| | - Nana F. Bello
- Laboratory of Molecular Microbiology, National Institute of Allergy and Infectious Diseases, NIH, Bethesda, MD 20892
| | - Fadila Bouamr
- Laboratory of Molecular Microbiology, National Institute of Allergy and Infectious Diseases, NIH, Bethesda, MD 20892
- Corresponding authors: Tsan Sam Xiao, PhD, Phone: 301 402 9782, Fax: 301 480 1291, . Fadila Bouamr, PhD, Phone: 301 496 4099, Fax: 301 402 0226,
| | - Tsan Sam Xiao
- Laboratory of Immunology, National Institute of Allergy and Infectious Diseases, NIH, Bethesda, MD 20892
- Corresponding authors: Tsan Sam Xiao, PhD, Phone: 301 402 9782, Fax: 301 480 1291, . Fadila Bouamr, PhD, Phone: 301 496 4099, Fax: 301 402 0226,
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9
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Martinelli N, Hartlieb B, Usami Y, Sabin C, Dordor A, Miguet N, Avilov SV, Ribeiro EA, Göttlinger H, Weissenhorn W. CC2D1A is a regulator of ESCRT-III CHMP4B. J Mol Biol 2012; 419:75-88. [PMID: 22406677 DOI: 10.1016/j.jmb.2012.02.044] [Citation(s) in RCA: 48] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/13/2012] [Revised: 02/29/2012] [Accepted: 02/29/2012] [Indexed: 12/01/2022]
Abstract
Endosomal sorting complexes required for transport (ESCRTs) regulate diverse processes ranging from receptor sorting at endosomes to distinct steps in cell division and budding of some enveloped viruses. Common to all processes is the membrane recruitment of ESCRT-III that leads to membrane fission. Here, we show that CC2D1A is a novel regulator of ESCRT-III CHMP4B function. We demonstrate that CHMP4B interacts directly with CC2D1A and CC2D1B with nanomolar affinity by forming a 1:1 complex. Deletion mapping revealed a minimal CC2D1A-CHMP4B binding construct, which includes a short linear sequence within the third DM14 domain of CC2D1A. The CC2D1A binding site on CHMP4B was mapped to the N-terminal helical hairpin. Based on a crystal structure of the CHMP4B helical hairpin, two surface patches were identified that interfere with CC2D1A interaction as determined by surface plasmon resonance. Introducing these mutations into a C-terminal truncation of CHMP4B that exerts a potent dominant negative effect on human immunodeficiency virus type 1 budding revealed that one of the mutants lost this effect completely. This suggests that the identified CC2D1A binding surface might be required for CHMP4B polymerization, which is consistent with the finding that CC2D1A binding to CHMP4B prevents CHMP4B polymerization in vitro. Thus, CC2D1A might act as a negative regulator of CHMP4B function.
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Affiliation(s)
- Nicolas Martinelli
- Unit of Virus Host Cell Interactions UMI 3265, Université Joseph Fourier-EMBL-CNRS, 6 rue Jules Horowitz, 38042 Grenoble Cedex 9, France
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