Molecular dissection of Flock house virus protein B2 reveals that electrostatic interactions between N-terminal domains of B2 monomers are critical for dimerization.

Abstract:

:Flock house virus (FHV) encodes a suppressor protein B2 to overcome antiviral RNA silencing during infection. Biochemical analyses have shown that a homodimer of B2 binds to double-stranded RNA to inhibit dicer-mediated cleavage of dsRNA and incorporation of small interfering RNAs into the RNA-induced silencing complex. In this study, using FHV-Nicotiana benthamiana system, we identified that the charged amino acids at the N-terminus of B2 are critical for dimerization. Interestingly, B2 mutants defective in dimerization exhibited enhanced silencing suppressor activity, Furthermore, we found that the C-terminal charged amino acids are dispensable for B2 dimerization and viral RNA silencing suppression but are critical for transgene silencing suppression. Additional yeast two hybrid assays revealed that dimerization of B2 is not essential for interacting with the RNA silencing machinery. Taken together, our data provide evidence that both monomeric and dimeric B2 proteins function in different modes to suppress RNA silencing.

journal_name

Virology

journal_title

Virology

authors

Seo JK,Kwon SJ,Rao AL

doi

10.1016/j.virol.2012.05.023

subject

Has Abstract

pub_date

2012-10-25 00:00:00

pages

296-305

issue

2

eissn

0042-6822

issn

1096-0341

pii

S0042-6822(12)00274-7

journal_volume

432

pub_type

杂志文章

相关文献

VIROLOGY文献大全
  • In vivo infection of ramified microglia from adult cat central nervous system by feline immunodeficiency virus.

    abstract::Infection of microglial cells by the human immunodeficiency virus (HIV) is supposed to play an important role in the pathogenesis of AIDS-related central nervous system (CNS) complications. So far, however, experimental data about interactions between HIV and ramified microglia from the adult CNS were only occasionall...

    journal_title:Virology

    pub_type: 杂志文章

    doi:10.1006/viro.1999.0152

    authors: Hein A,Martin JP,Koehren F,Bingen A,Dörries R

    更新日期:2000-03-15 00:00:00

  • Characterization of the Rep78/adeno-associated virus complex.

    abstract::Adeno-associated virus (AAV) replication proteins Rep78 and Rep68 play major roles in the life cycle of AAV. We have recently provided in vivo evidence for the existence of a covalent association between Rep78 and virion single-stranded (ss) AAV DNA (K. M. R. Prasad and J.P. Trempe(1995) Virology 214, 360-370). In thi...

    journal_title:Virology

    pub_type: 杂志文章

    doi:10.1006/viro.1996.8431

    authors: Prasad KM,Zhou C,Trempe JP

    更新日期:1997-03-03 00:00:00

  • Raccoon poxvirus feline panleukopenia virus VP2 recombinant protects cats against FPV challenge.

    abstract::An infectious raccoon poxvirus (RCNV) was used to express the feline panleukopenia virus (FPV) open reading frame VP2. The recombinant, RCNV/FPV, was constructed by homologous recombination with a chimeric plasmid for inserting the expression cassette into the thymidine kinase (TK) locus of RCNV. Expression of the VP2...

    journal_title:Virology

    pub_type: 杂志文章

    doi:10.1006/viro.1996.0186

    authors: Hu L,Esposito JJ,Scott FW

    更新日期:1996-04-01 00:00:00

  • Genetic analysis of bipartite geminivirus tissue tropism.

    abstract::The bipartite geminiviruses bean golden mosaic virus (BGMV), cabbage leaf curl virus (CabLCV), and tomato golden mosaic virus (TGMV) exhibit differential tissue tropism in Nicotiana benthamiana. In systemically infected leaves, BGMV remains largely confined to vascular-associated cells (phloem-limited), whereas CabLCV...

    journal_title:Virology

    pub_type: 杂志文章

    doi:10.1006/viro.2001.1205

    authors: Qin Y,Petty IT

    更新日期:2001-12-20 00:00:00

  • The flavivirus-conserved penta-nucleotide in the 3' stem-loop of the West Nile virus genome requires a specific sequence and structure for RNA synthesis, but not for viral translation.

    abstract::A reporting replicon of West Nile virus (WN) was used to distinguish between the function of the 3' untranslated region (UTR) in viral translation and RNA replication. Deletions of various regions of the 3' UTR of the replicon did not significantly affect viral translation, but abolished RNA replication. A systematic ...

    journal_title:Virology

    pub_type: 杂志文章

    doi:10.1016/j.virol.2004.07.022

    authors: Tilgner M,Deas TS,Shi PY

    更新日期:2005-01-20 00:00:00

  • Analysis of the unoccupied site of an integrated human papillomavirus 16 sequence in a cervical carcinoma.

    abstract::We have previously cloned and analyzed the structure of a type 16 human papillomavirus (HPV16) integration in a primary cervical carcinoma tissue, M50 (Choo et al., J. Virol. 62, 1659-1666, 1988). We found that specific nucleotide sequences within the HPV16 genome influenced the genomic organization of the integrated ...

    journal_title:Virology

    pub_type: 杂志文章

    doi:10.1016/0042-6822(90)90366-y

    authors: Choo KB,Lee HH,Liew LN,Chong KY,Chou HF

    更新日期:1990-10-01 00:00:00

  • The conserved process of TCR/CD3 complex down-modulation by SIV Nef is mediated by the central core, not endocytic motifs.

    abstract::The Nef protein of Simian immunodeficiency virus (SIV) associates with multiple T lymphocyte signaling proteins, including the T cell receptor (TCR) zeta chain. We demonstrate here that these interactions are conserved and highly specific. Nefs derived from genetically diverse strains of SIV (SIV(mac)239, SIV(smm)PBj,...

    journal_title:Virology

    pub_type: 杂志文章

    doi:10.1006/viro.2002.1628

    authors: Schaefer TM,Bell I,Pfeifer ME,Ghosh M,Trible RP,Fuller CL,Ashman C,Reinhart TA

    更新日期:2002-10-10 00:00:00

  • Cucumber mosaic virus-induced RNA replicase: solubilization and partial purification of the particulate enzyme.

    abstract::Cucumber seedlings infected with cucumber mosaic virus (CMV) contain a virus-induced RNA-dependent RNA polymerase (RNA replicase) in both soluble and particulate fractions of plant extracts; no such activity is found in uninfected plants. The extensive purification and characterization of the soluble RNA replicase has...

    journal_title:Virology

    pub_type: 杂志文章

    doi:10.1016/0042-6822(81)90131-8

    authors: Gill DS,Kumarasamy R,Symons RH

    更新日期:1981-08-01 00:00:00

  • Identification of a new neutralization epitope on VP7 of human serotype 2 rotavirus and evidence for electropherotype differences caused by single nucleotide substitutions.

    abstract::Neutralizing monoclonal antibodies 2F1 and 1C10, which are specific for VP7 of serotype 2 rotaviruses (G2), were used to select neutralization escape variants of the human serotype 2 rotavirus, DS-1. Neutralization survival patterns generated by monoclonal antibodies 2F1, 1C10, and RV5:3 indicated that 2F1 and 1C10 di...

    journal_title:Virology

    pub_type: 杂志文章

    doi:10.1006/viro.1993.1601

    authors: Dunn SJ,Ward RL,McNeal MM,Cross TL,Greenberg HB

    更新日期:1993-11-01 00:00:00

  • Transcriptional activation from the long-terminal repeat of human immunodeficiency virus in vitro.

    abstract::The mechanism of trans-acting regulation of transcription from the long terminal repeat (LTR) of human immunodeficiency virus (HIV) has been investigated. The roles of the cis-acting elements within HIV LTR, as well as the trans-acting factors present in HIV-infected cells, have been evaluated by an in vitro transcrip...

    journal_title:Virology

    pub_type: 杂志文章

    doi:10.1016/0042-6822(90)90526-w

    authors: Okamoto T,Benter T,Josephs SF,Sadaie MR,Wong-Staal F

    更新日期:1990-08-01 00:00:00

  • Effect of C-terminal mutations of alfalfa mosaic virus coat protein on dimer formation and assembly in vitro.

    abstract::The coat protein (CP) of alfalfa mosaic virus (AMV) strain 425 assembles to bacilliform or rod-shaped particles in the presence of nucleic acids or to T = 1 empty icosahedral particles in the absence of nucleic acids. To study the determinants of CP assembly, recombinant CPs (rCPs) that contained a (His)(6) region wer...

    journal_title:Virology

    pub_type: 杂志文章

    doi:10.1006/viro.1999.9805

    authors: Choi J,Loesch-Fries LS

    更新日期:1999-07-20 00:00:00

  • Loss of the N-linked glycosylation site at position 386 in the HIV envelope V4 region enhances macrophage tropism and is associated with dementia.

    abstract::HIV infects macrophages and microglia in the central nervous system (CNS). Mechanisms that enhance HIV macrophage/microglial tropism are not well understood. Here, we identify an HIV Env variant in the V4 region of gp120, Asp 386 (D386), that eliminates an N-linked glycosylation site at position 386, enhances viral re...

    journal_title:Virology

    pub_type: 杂志文章

    doi:10.1016/j.virol.2007.05.029

    authors: Dunfee RL,Thomas ER,Wang J,Kunstman K,Wolinsky SM,Gabuzda D

    更新日期:2007-10-10 00:00:00

  • Mapping of linear antigenic sites on the S glycoprotein of a neurotropic murine coronavirus with synthetic peptides: a combination of nine prediction algorithms fails to identify relevant epitopes and peptide immunogenicity is drastically influenced by th

    abstract::The elucidation of the antigenic structure of the S glycoprotein of murine coronaviruses will provide further understanding of the complex pathogenicity of these viruses. In order to identify linear antigenic determinants, the primary structure of the S glycoprotein of murine hepatitis virus strain A59 was analyzed wi...

    journal_title:Virology

    pub_type: 杂志文章

    doi:10.1006/viro.1994.1376

    authors: Daniel C,Lacroix M,Talbot PJ

    更新日期:1994-08-01 00:00:00

  • Phospholipid molecular species profiles of tectiviruses infecting Gram-negative and Gram-positive hosts.

    abstract::The phospholipid (PL) molecular species compositions of bacteriophages PRD1 and Bam35 as well as their respective hosts were determined quantitatively using liquid chromatography/electrospray ionization mass-spectrometry (LC-ESI-MS) and backed up by gas-chromatographic/mass-spectrometric (GC-MS) analysis of the total ...

    journal_title:Virology

    pub_type: 杂志文章

    doi:10.1016/j.virol.2004.02.009

    authors: Laurinavicius S,Käkelä R,Somerharju P,Bamford DH

    更新日期:2004-05-01 00:00:00

  • Modeling-based characterization of the elicitor function of amino acid 461 of Cucumber mosaic virus 1a protein in the hypersensitive response.

    abstract::The Ns strain of Cucumber mosaic virus (CMV) induces hypersensitive response (HR) on Nicotiana tabacum cv. Xanthi-nc and on Nicotiana glutinosa. The genetic determinant of the HR induction was localized earlier to amino acid 461 of the 1a protein. The 3D structure of the 1a protein is still unknown and building a homo...

    journal_title:Virology

    pub_type: 杂志文章

    doi:10.1016/j.virol.2006.08.014

    authors: Salánki K,Gellért A,Náray-Szabó G,Balázs E

    更新日期:2007-02-05 00:00:00

  • Human immunodeficiency virus type 1 Nef protein mediates neural cell death: a neurotoxic role for IP-10.

    abstract::HIV-1 Nef is expressed in astrocytes, but a contribution to neuropathogenesis and the development of HIV-associated dementia (HAD) remains uncertain. To determine the neuropathogenic actions of the HIV-1 Nef protein, the brain-derived (YU-2) and blood-derived (NL4-3) Nef proteins were expressed in neural cells using a...

    journal_title:Virology

    pub_type: 杂志文章

    doi:10.1016/j.virol.2004.08.024

    authors: van Marle G,Henry S,Todoruk T,Sullivan A,Silva C,Rourke SB,Holden J,McArthur JC,Gill MJ,Power C

    更新日期:2004-11-24 00:00:00

  • Reduction of soluble dipeptidyl peptidase 4 levels in plasma of patients infected with Middle East respiratory syndrome coronavirus.

    abstract::Dipeptidyl peptidase 4 (DPP4) is a receptor for MERS-CoV. The soluble form of DPP4 (sDPP4) circulates systematically and can competitively inhibit MERS-CoV entry into host cells. Here, we measured the concentration of sDPP4 in the plasma and sputa of 14 MERS-CoV-infected patients of various degrees of disease severity...

    journal_title:Virology

    pub_type: 杂志文章

    doi:10.1016/j.virol.2018.03.015

    authors: Inn KS,Kim Y,Aigerim A,Park U,Hwang ES,Choi MS,Kim YS,Cho NH

    更新日期:2018-05-01 00:00:00

  • Sequences within the early and late promoters of archetype JC virus restrict viral DNA replication and infectivity.

    abstract::Two forms of JC virus (JCV) have been isolated from its human host, an archetype found in kidney tissue and urine of nonimmunocompromised individuals and a rearranged type detected in lymphocytes and brain tissue of patients with and without progressive multifocal leukoencephalopathy. To investigate the hypothesis tha...

    journal_title:Virology

    pub_type: 杂志文章

    doi:10.1006/viro.1996.0037

    authors: Daniel AM,Swenson JJ,Mayreddy RP,Khalili K,Frisque RJ

    更新日期:1996-02-01 00:00:00

  • Crystalline cowpea mosaic virus.

    abstract::Crystals of Cowpea mosaic virus displaying a high degree of order have been grown in two different forms. Hexagonal crystals, space group P6(1)22 or P6(5)22 with a = 450 A and c = 1038 A containing six virus particles per cell, have been grown in sodium citrate buffer at pH 4.9. Each particle has four nearest neighbor...

    journal_title:Virology

    pub_type: 杂志文章

    doi:10.1016/0042-6822(80)90513-9

    authors: White JM,Johnson JE

    更新日期:1980-02-01 00:00:00

  • Two cellular microRNAs, miR-196b and miR-1290, contribute to HIV-1 latency.

    abstract::Understanding the mechanism of HIV-1 latency is crucial to the viral reservoir eradication. Human cellular miRNAs can modulate HIV-1 expression by targeting of viral RNAs or host gene transcripts. To identify miRNAs modulating HIV-1 latency, we determined the miRNA expression profiles of HIV-1 latently infected and pr...

    journal_title:Virology

    pub_type: 杂志文章

    doi:10.1016/j.virol.2015.09.016

    authors: Wang P,Qu X,Zhou X,Shen Y,Ji H,Fu Z,Deng J,Lu P,Yu W,Lu H,Zhu H

    更新日期:2015-12-01 00:00:00

  • Identification of novel virus-specific antigens by CD4⁺ and CD8⁺ T cells from asymptomatic HSV-2 seropositive and seronegative donors.

    abstract::Reactivation of latent herpes simplex virus 2 (HSV-2) infections can be characterized by episodic recurrent genital lesions and/or viral shedding. We hypothesize that infected (HSV-2(pos)) asymptomatic individuals have acquired T cell responses to specific HSV-2 antigen(s) that may be an important factor in controllin...

    journal_title:Virology

    pub_type: 杂志文章

    doi:10.1016/j.virol.2014.07.018

    authors: Long D,Skoberne M,Gierahn TM,Larson S,Price JA,Clemens V,Baccari AE,Cohane KP,Garvie D,Siber GR,Flechtner JB

    更新日期:2014-09-01 00:00:00

  • A membrane-associated movement protein of Pelargonium flower break virus shows RNA-binding activity and contains a biologically relevant leucine zipper-like motif.

    abstract::Two small viral proteins (DGBp1 and DGBp2) have been proposed to act in a concerted manner to aid intra- and intercellular trafficking of carmoviruses though the distribution of functions and mode of action of each protein partner are not yet clear. Here we have confirmed the requirement of the DGBps of Pelargonium fl...

    journal_title:Virology

    pub_type: 杂志文章

    doi:10.1016/j.virol.2011.03.001

    authors: Martínez-Turiño S,Hernández C

    更新日期:2011-05-10 00:00:00

  • Drosophila as a genetic model for studying pathogenic human viruses.

    abstract::Viruses are infectious particles whose viability is dependent on the cells of living organisms, such as bacteria, plants, and animals. It is of great interest to discover how viruses function inside host cells in order to develop therapies to treat virally infected organisms. The fruit fly Drosophila melanogaster is a...

    journal_title:Virology

    pub_type: 杂志文章,评审

    doi:10.1016/j.virol.2011.11.016

    authors: Hughes TT,Allen AL,Bardin JE,Christian MN,Daimon K,Dozier KD,Hansen CL,Holcomb LM,Ahlander J

    更新日期:2012-02-05 00:00:00

  • Activation of Bcl-2 promoter-directed gene expression by the human immunodeficiency virus type-1 Tat protein.

    abstract::Human immunodeficiency virus type 1 (HIV-1) Tat transcriptionally activates expression from a number of viral and cellular promoters. Recent studies demonstrate the ability of Tat to differentially modulate cellular responses to apoptotic signaling. The antiapoptotic effects of Tat appear to correlate with increased e...

    journal_title:Virology

    pub_type: 杂志文章

    doi:10.1006/viro.1999.9688

    authors: Wang Z,Morris GF,Reed JC,Kelly GD,Morris CB

    更新日期:1999-05-10 00:00:00

  • Comparative genomics of the late gene cluster from Lactobacillus phages.

    abstract::Three prophage sequences were identified in the Lactobacillus johnsoni strain NCC533. Prophage Lj965 predicted a gene map very similar to those of pac-site Streptococcus thermophilus phages over its DNA packaging and head and tail morphogenesis modules. Sequence similarity linked the putative DNA packaging and head mo...

    journal_title:Virology

    pub_type: 杂志文章

    doi:10.1006/viro.2000.0498

    authors: Desiere F,Pridmore RD,Brüssow H

    更新日期:2000-09-30 00:00:00

  • Origins of dengue type 2 viruses associated with increased pathogenicity in the Americas.

    abstract::The recent emergence and spread of dengue hemorrhagic fever in the Americas have been a major source of concern. Efforts to control this disease are dependent on understanding the pathogenicity of dengue viruses and their transmission dynamics. Pathogenicity studies have been hampered by the lack of in vitro or in viv...

    journal_title:Virology

    pub_type: 杂志文章

    doi:10.1006/viro.1997.8504

    authors: Rico-Hesse R,Harrison LM,Salas RA,Tovar D,Nisalak A,Ramos C,Boshell J,de Mesa MT,Nogueira RM,da Rosa AT

    更新日期:1997-04-14 00:00:00

  • Transforming properties of Felis catus papillomavirus type 2 E6 and E7 putative oncogenes in vitro and their transcriptional activity in feline squamous cell carcinoma in vivo.

    abstract::Felis catus papillomavirus type 2 (FcaPV2) DNA is found in feline cutaneous squamous cell carcinomas (SCCs); however, its biological properties are still uncharacterized. In this study, we successfully expressed FcaPV2 E6 and E7 putative oncogenes in feline epithelial cells and demonstrated that FcaPV2 E6 binds to p53...

    journal_title:Virology

    pub_type: 杂志文章

    doi:10.1016/j.virol.2016.05.017

    authors: Altamura G,Corteggio A,Pacini L,Conte A,Pierantoni GM,Tommasino M,Accardi R,Borzacchiello G

    更新日期:2016-09-01 00:00:00

  • The genome of the archaeal virus SIRV1 has features in common with genomes of eukaryal viruses.

    abstract::The virus SIRV1 of the extremely thermophilic archaeon Sulfolobus has a double-stranded DNA genome similar in architecture to the genomes of eukaryal viruses of the families Poxviridae, Pycodnaviridae, and Asfarviridae: the two strands of the 32,301 bp long linear genome are covalently connected forming a continuous p...

    journal_title:Virology

    pub_type: 杂志文章

    doi:10.1006/viro.2000.0776

    authors: Blum H,Zillig W,Mallok S,Domdey H,Prangishvili D

    更新日期:2001-03-01 00:00:00

  • Retrovirus insertion into herpesvirus: characterization of a Marek's disease virus harboring a solo LTR.

    abstract::We recently reported the phenomenon of retroviral insertion into a herpesvirus (Isfort et al., (1992) Proc. Natl. Acad. Sci. USA 89, 991-995). We have now isolated Marek's disease virus (MDV) clones that carry retroviral inserts. Retroviral LTR insertion has the potential to activate or inactivate herpesvirus genes le...

    journal_title:Virology

    pub_type: 杂志文章

    doi:10.1006/viro.1993.1018

    authors: Kost R,Jones D,Isfort R,Witter R,Kung HJ

    更新日期:1993-01-01 00:00:00

  • Porcine reproductive and respiratory syndrome virus non-structural protein 1 suppresses tumor necrosis factor-alpha promoter activation by inhibiting NF-κB and Sp1.

    abstract::The objective of this study was to identify porcine reproductive and respiratory syndrome virus (PRRSV)-encoded proteins that are responsible for the inhibition of TNF-α expression and the mechanism(s) involved in this phenomenon. Using a TNF-α promoter reporter system, the non-structural protein 1 (Nsp1) was found to...

    journal_title:Virology

    pub_type: 杂志文章

    doi:10.1016/j.virol.2010.07.016

    authors: Subramaniam S,Kwon B,Beura LK,Kuszynski CA,Pattnaik AK,Osorio FA

    更新日期:2010-10-25 00:00:00