Abstract:
:Pestiviruses prevent alpha/beta interferon (IFN-alpha/beta) production by promoting proteasomal degradation of interferon regulatory factor 3 (IRF3) by means of the viral N(pro) nonstructural protein. N(pro) is also an autoprotease, and its amino-terminal coding sequence is involved in translation initiation. We previously showed with classical swine fever virus (CSFV) that deletion of the entire N(pro) gene resulted in attenuation in pigs. In order to elaborate on the role of the N(pro)-mediated IRF3 degradation in classical swine fever pathogenesis, we searched for minimal amino acid substitutions in N(pro) that would specifically abrogate this function. Our mutational analyses showed that degradation of IRF3 and autoprotease activity are two independent but structurally overlapping functions of N(pro). We describe two mutations in N(pro) that eliminate N(pro)-mediated IRF3 degradation without affecting the autoprotease activity. We also show that the conserved standard sequence at these particular positions is essential for N(pro) to interact with IRF3. Surprisingly, when these two mutations are introduced independently in the backbones of highly and moderately virulent CSFV, the resulting viruses are not attenuated, or are only partially attenuated, in 8- to 10-week-old pigs. This contrasts with the fact that these mutant viruses have lost the capacity to degrade IRF3 and to prevent IFN-alpha/beta induction in porcine cell lines and monocyte-derived dendritic cells. Taken together, these results demonstrate that contrary to previous assumptions and to the case for other viral systems, impairment of IRF3-dependent IFN-alpha/beta induction is not a prerequisite for CSFV virulence.
journal_name
J Viroljournal_title
Journal of virologyauthors
Ruggli N,Summerfield A,Fiebach AR,Guzylack-Piriou L,Bauhofer O,Lamm CG,Waltersperger S,Matsuno K,Liu L,Gerber M,Choi KH,Hofmann MA,Sakoda Y,Tratschin JDdoi
10.1128/JVI.01509-08subject
Has Abstractpub_date
2009-01-01 00:00:00pages
817-29issue
2eissn
0022-538Xissn
1098-5514pii
JVI.01509-08journal_volume
83pub_type
杂志文章abstract::We tested the ability of human monoclonal antibodies (immunoglobulin G1b12 [IgG1b12] and 19b) and CD4-based molecules (CD4-IgG2 and soluble CD4 [sCD4]) to neutralize human immunodeficiency virus type 1 directly from the plasma of seropositive donors in an ex vivo neutralization assay. IgG1b12 and CD4-IgG2, at concentr...
journal_title:Journal of virology
pub_type: 杂志文章
doi:10.1128/JVI.70.4.2586-2592.1996
更新日期:1996-04-01 00:00:00
abstract::The tempo and intensity of retroviral neuropathogenesis are dependent on the capacity of the virus to invade the central nervous system. For murine leukemia viruses, an important determinant of neuroinvasiveness is the virus-encoded protein glycosylated Gag, the function of which in the virus life cycle is not known. ...
journal_title:Journal of virology
pub_type: 杂志文章
doi:10.1128/JVI.72.7.5619-5625.1998
更新日期:1998-07-01 00:00:00
abstract::With the aid of three monoclonal antibodies (MAbs), a glycoprotein specifically localized to the outer envelope of vaccinia virus was shown to be encoded by the A33R gene. These MAbs reacted with a glycosylated protein that migrated as 23- to 28-kDa and 55-kDa species under reducing and nonreducing conditions, respect...
journal_title:Journal of virology
pub_type: 杂志文章
doi:10.1128/JVI.70.6.3753-3762.1996
更新日期:1996-06-01 00:00:00
abstract::Severe acute respiratory syndrome (SARS) is a life-threatening disease caused by a newly identified coronavirus (CoV), SARS-CoV. The spike (S) glycoprotein of CoV is the major structural protein responsible for induction of host immune response and virus neutralization by antibodies. Hence, knowledge of neutralization...
journal_title:Journal of virology
pub_type: 杂志文章
doi:10.1128/JVI.78.13.6938-6945.2004
更新日期:2004-07-01 00:00:00
abstract::A detailed restriction endonuclease map for the genome of Bacillus subtilis phage SP01 is presented. Sites of cleavage for the restriction enzymes BglII, EcoRI, HaeIII, and SalI were determined. This physical map showed that SP01 DNA was 140 kilobases in length and contained a repeated sequence of 12.4 kilobases at it...
journal_title:Journal of virology
pub_type: 杂志文章
doi:10.1128/JVI.31.1.156-171.1979
更新日期:1979-07-01 00:00:00
abstract::Human immunodeficiency virus type 1 uses ribosomal frameshifting for translation of the Gag-Pol polyprotein. Frameshift activities are thought to be tightly regulated. Analysis of gag p1 sequences from 270 plasma virions identified in 64% of the samples the occurrence of polymorphism that could lead to changes in ther...
journal_title:Journal of virology
pub_type: 杂志文章
doi:10.1128/jvi.76.15.7868-7873.2002
更新日期:2002-08-01 00:00:00
abstract::Cytotoxic T lymphocytes (CTL) recognize virus peptide fragments complexed with class I major histocompatibility complex (MHC) molecules on the surface of virus-infected cells. Recognition is mediated by a membrane-bound T-cell receptor (TCR) composed of alpha and beta chains. Studies of the CTL response to lymphocytic...
journal_title:Journal of virology
pub_type: 杂志文章
doi:10.1128/JVI.66.4.2527-2531.1992
更新日期:1992-04-01 00:00:00
abstract:UNLABELLED:Baculovirus DNAs are synthesized and inserted into preformed capsids to form nucleocapsids at a site in the infected cell nucleus, termed the virogenic stroma. Nucleocapsid assembly ofAutographa californicamultiple nucleopolyhedrovirus (AcMNPV) requires the major capsid protein VP39 and nine minor capsid pro...
journal_title:Journal of virology
pub_type: 杂志文章
doi:10.1128/JVI.02885-15
更新日期:2016-03-28 00:00:00
abstract::The human cytomegalovirus (HCMV) major immediate-early (MIE) enhancer contains five functional cyclic AMP (cAMP) response elements (CRE). Because the CRE in their native context do not contribute appreciably to MIE enhancer/promoter activity in lytically infected human fibroblasts and NTera2 (NT2)-derived neurons, we ...
journal_title:Journal of virology
pub_type: 杂志文章
doi:10.1128/JVI.01524-06
更新日期:2007-06-01 00:00:00
abstract::In a study of the evolution and distribution of avian retroviruses, we found avian sarcoma and leukosis virus (ASLV) gag genes in 26 species of galliform birds from North America, Central America, eastern Europe, Asia, and Africa. Nineteen of the 26 host species from whom ASLVs were sequenced were not previously known...
journal_title:Journal of virology
pub_type: 杂志文章
doi:10.1128/jvi.74.9.3984-3995.2000
更新日期:2000-05-01 00:00:00
abstract::Tankyrase (TNKS) is a telomere-associated poly-ADP ribose polymerase (PARP) that has been implicated along with several telomere repeat binding factors in the regulation of Epstein-Barr virus origin of plasmid replication (OriP). We now show that TNKS1 can bind to the family of repeats (FR) and dyad symmetry regions o...
journal_title:Journal of virology
pub_type: 杂志文章
doi:10.1128/JVI.79.8.4640-4650.2005
更新日期:2005-04-01 00:00:00
abstract::A human cell line (293) transformed by adenovirus type 5 encodes mRNA's and proteins from the early region 1 (E1) of the viral genome. These products correspond to those synthesized early after adenovirus infection of normal cells. This pattern of expression is different from that observed at later times in the lytic ...
journal_title:Journal of virology
pub_type: 杂志文章
doi:10.1128/JVI.36.3.860-871.1980
更新日期:1980-12-01 00:00:00
abstract::The temperature-sensitive and attenuated phenotypes of the Sabin type 1 vaccine strain of poliovirus result from numerous point mutations which occurred in the virulent Mahoney virus parent. One of these mutations is located in a 3D polymerase (3Dpol) codon (U-6203-->C, Tyr-73-->His) and is involved in attenuation in ...
journal_title:Journal of virology
pub_type: 杂志文章
doi:10.1128/JVI.69.9.5278-5286.1995
更新日期:1995-09-01 00:00:00
abstract::When mouse L cells are infected for 22 hr with vesicular stomatitis virus (VSV), a ribonucleic acid-containing enveloped virus, greater than 70% of the major histocompatibility antigen (H-2), is no longer detectable by the method of inhibition of immune cytolysis. Infected cells prelabeled with (14)C-glucosamine also ...
journal_title:Journal of virology
pub_type: 杂志文章
doi:10.1128/JVI.10.4.578-585.1972
更新日期:1972-10-01 00:00:00
abstract::The product of the v-myb oncogene of avian myeloblastosis virus is a nuclear protein with an associated DNA-binding activity. We demonstrated that the highly conserved amino-terminal domain of p48v-myb is required for its associated DNA-binding activity. This activity is not required for the nuclear localization of p4...
journal_title:Journal of virology
pub_type: 杂志文章
doi:10.1128/JVI.62.11.4398-4402.1988
更新日期:1988-11-01 00:00:00
abstract::Reactivations of persistent viral infections pose a significant medical problem in immunocompromised cancer, transplant, and AIDS patients, yet little is known about how persistent viral infections are immunologically controlled. Here we describe a mouse model for investigating the role of the immune response in contr...
journal_title:Journal of virology
pub_type: 杂志文章
doi:10.1128/JVI.72.8.6559-6564.1998
更新日期:1998-08-01 00:00:00
abstract::The small membrane glycoprotein (GS) of equine arteritis virus (EAV) is a minor virion component but is abundantly expressed in EAV-infected cells. In this study, we have analyzed its membrane topology, folding, oligomerization, and intracellular transport. We show that GS is a class I integral membrane protein with o...
journal_title:Journal of virology
pub_type: 杂志文章
doi:10.1128/JVI.69.6.3441-3448.1995
更新日期:1995-06-01 00:00:00
abstract::A gene encoding a homolog of glycoprotein B of herpes simplex virus (gB homolog) has been identified on the Marek's disease virus (MDV) genome (L. J. N. Ross, M. Sanderson, S. D. Scott, M. M. Binns, T. Doel, and B. Milne, J. Gen. Virol. 70:1789-1804, 1989); however, the molecular and immunological characteristics of t...
journal_title:Journal of virology
pub_type: 杂志文章
doi:10.1128/JVI.66.5.2631-2638.1992
更新日期:1992-05-01 00:00:00
abstract::In eukaryotic cells, cell growth and division occur in a stepwise, orderly fashion described by a process known as the cell cycle. The relationship between positive-strand RNA viruses and the cell cycle and the concomitant effects on virus replication are not clearly understood. We have shown that infection of asynchr...
journal_title:Journal of virology
pub_type: 杂志文章
doi:10.1128/JVI.80.8.4147-4156.2006
更新日期:2006-04-01 00:00:00
abstract::Bacteriophage T4 gene 32 encodes a DNA unwinding protein required for DNA replication, repair, and recombination. Gene 32 temperature-sensitive mutations enhance virtually all base pair substitution mutation rates. ...
journal_title:Journal of virology
pub_type: 杂志文章
doi:10.1128/JVI.19.2.490-494.1976
更新日期:1976-08-01 00:00:00
abstract::Retroviral Gag proteins direct the assembly and release of virus particles from the plasma membrane. The budding machinery consists of three small domains, the M (membrane-binding), I (interaction), and L (late or "pinching-off") domains. In addition, Gag proteins contain sequences that control particle size. For Rous...
journal_title:Journal of virology
pub_type: 杂志文章
doi:10.1128/JVI.75.14.6527-6536.2001
更新日期:2001-07-01 00:00:00
abstract::The NS3 protein of hepatitis C virus contains a bipartite structure consisting of an N-terminal serine protease and a C-terminal DEAD box helicase. We show that the C-terminal domain has ATPase and panhelicase activities. The integrity of the helicase function is dependent on the conserved DEAD motif and can be abolis...
journal_title:Journal of virology
pub_type: 杂志文章
doi:10.1128/JVI.71.8.6264-6266.1997
更新日期:1997-08-01 00:00:00
abstract::High concentrations of either trypsin or chymotrypsin caused nearly complete cleavage of capsid protein VP2 of hepatitis A virus but did not significantly reduce the infectivity, thermostability, or antigenicity of the virus. Chymotrypsin also had a lesser effect on VP1. These findings indicate the presence of a prote...
journal_title:Journal of virology
pub_type: 杂志文章
doi:10.1128/JVI.65.10.5636-5640.1991
更新日期:1991-10-01 00:00:00
abstract::RmI, a circular chimera made of the polyomavirus (Py) genome with an insertion of mouse DNA (Ins), effectively undergoes intramolecular recombination in normal mouse cells, as indicated by the conversion of cloned RmI (RmIc) into unit-length Py DNA in transfected cultures. To follow the fate of the cellular component ...
journal_title:Journal of virology
pub_type: 杂志文章
doi:10.1128/JVI.61.3.845-850.1987
更新日期:1987-03-01 00:00:00
abstract::Borna disease virus (BDV) is a nonsegmented negative-strand (NNS) RNA virus that is unusual because it replicates in the nucleus. The most abundant viral protein in infected cells is a 38/39-kDa doublet that is presumed to represent the nucleocapsid. Infectious particles also contain high levels of this protein, accou...
journal_title:Journal of virology
pub_type: 杂志文章
doi:10.1128/JVI.71.7.5133-5139.1997
更新日期:1997-07-01 00:00:00
abstract::Bacteriophage PRD1 contains DNA, 17 proteins, and lipid. The assembly pathway involves the formation of empty particles that contain lipid and all of the proteins of mature virions, with the possible exception of one. The major and minor capsid proteins, P3 and P5, occur as soluble multimers before they appear in the ...
journal_title:Journal of virology
pub_type: 杂志文章
doi:10.1128/JVI.44.3.1021-1030.1982
更新日期:1982-12-01 00:00:00
abstract::Human T-cell lymphotropic virus type 1 (HTLV-1) is transmitted through a viral synapse and enters target cells via interaction with the glucose transporter GLUT1. Here, we show that Neuropilin-1 (NRP1), the receptor for semaphorin-3A and VEGF-A165 and a member of the immune synapse, is also a physical and functional p...
journal_title:Journal of virology
pub_type: 杂志文章
doi:10.1128/JVI.02719-05
更新日期:2006-07-01 00:00:00
abstract::The expression and predicted products of rat c-ros-1 gene, the proto-oncogene of v-ros in UR2 sarcoma virus, were characterized. The c-ros-1 gene was found to be expressed in a tissue-specific manner, and the sizes of its transcripts were heterogeneous: 8.2 kilobases (kb) long in lung and kidney tissues, 6.9 kb in hea...
journal_title:Journal of virology
pub_type: 杂志文章
doi:10.1128/JVI.64.5.2117-2125.1990
更新日期:1990-05-01 00:00:00
abstract::Historically, the adenoviral E3 region was found to be nonessential for viral replication in vitro. In addition, adenoviruses whose genome was more than approximately 105% the size of the native genome were inefficiently packaged. These profound observations were used experimentally to insert transgenes into the adeno...
journal_title:Journal of virology
pub_type: 杂志文章
doi:10.1128/JVI.79.9.5455-5465.2005
更新日期:2005-05-01 00:00:00
abstract::Expression of the two bovine papillomavirus type 1 (BPV-1) late genes, L1 and L2, coding for the two capsid proteins, is limited to terminally differentiated keratinocytes in bovine fibropapillomas. This pattern of expression is determined both by the activity of the late promoter and by the inhibition of late region ...
journal_title:Journal of virology
pub_type: 杂志文章
doi:10.1128/JVI.65.11.5806-5812.1991
更新日期:1991-11-01 00:00:00