Abstract:
:The binding properties of seven CD4-blocking monoclonal antibodies raised against recombinant gp120 of human immunodeficiency virus type 1 strain MN (HIV-1MN) and two CD4-blocking monoclonal antibodies to recombinant envelope glycoproteins gp120 and gp160 of substrain IIIB of HIVLAI were analyzed. With a panel of recombinant gp120s from seven diverse HIV-1 isolates, eight of the nine antibodies were found to be strain specific and one was broadly cross-reactive. Epitope mapping revealed that all nine antibodies bound to epitopes located in the fourth conserved domain (C4) of gp120. Within this region, three distinct epitopes could be identified: two were polymorphic between HIV-1 strains, and one was highly conserved. Studies with synthetic peptides demonstrated that the conserved epitope, recognized by antibody 13H8, was located between residues 431 and 439. Site-directed mutagenesis of gp120 demonstrated that residue 429 and/or 432 was critical for the binding of the seven antibodies to gp120 from HIV-1MN. Similarly, residues 423 and 429 were essential for the binding of monoclonal antibody 5C2 raised against gp120 from HIV-1IIIB. The amino acids located at positions 423 and 429 were found to vary between strains of HIV-1 as well as between molecular clones derived from the MN and LAI isolates of HIV-1. Polymorphism at these positions prevented the binding of virus-neutralizing monoclonal antibodies and raised the possibility that HIV-1 neutralization serotypes may be defined on the basis of C4 domain sequences. Analysis of the binding characteristics of the CD4-blocking antibodies demonstrated that their virus-neutralizing activity was directly proportional to their gp120-binding affinity. These studies account for the strain specificity of antibodies to the C4 domain of gp120 and demonstrate for the first time that antibodies to this region can be as effective as those directed to the principal neutralizing determinant (V3 domain) in neutralizing HIV-1 infectivity.
journal_name
J Viroljournal_title
Journal of virologyauthors
Nakamura GR,Byrn R,Wilkes DM,Fox JA,Hobbs MR,Hastings R,Wessling HC,Norcross MA,Fendly BM,Berman PWdoi
10.1128/JVI.67.10.6179-6191.1993subject
Has Abstractpub_date
1993-10-01 00:00:00pages
6179-91issue
10eissn
0022-538Xissn
1098-5514journal_volume
67pub_type
杂志文章abstract::Open reading frame (ORF) E4 is a 353-base-pair ORF of bovine papillomavirus type 1. To determine the biological activities of this ORF in mouse C127 cells, we analyzed the effects of two constructed mutations which are predicted to prevent synthesis of ORF E4 proteins while leaving the amino acid sequence encoded by t...
journal_title:Journal of virology
pub_type: 杂志文章
doi:10.1128/JVI.61.4.1248-1252.1987
更新日期:1987-04-01 00:00:00
abstract::The amphotropic murine leukemia virus (MuLV) can infect cells from a number of mammals, including humans, via its specific receptor. Basic knowledge of amphotropic MuLV receptor expression is likely to be useful in the development and improvement of gene therapy protocols based on amphotropic-pseudotyped vectors. To i...
journal_title:Journal of virology
pub_type: 杂志文章
doi:10.1128/JVI.71.6.4564-4570.1997
更新日期:1997-06-01 00:00:00
abstract::Measles virus (MV) isolated in B95a cells, a marmoset B-cell line, retains full pathogenicity for cynomolgus monkeys, while its derivative obtained by adaptation to the growth in Vero cells, a monkey kidney cell line, loses the pathogenic potential (F. Kobune, H. Sakata, and A. Sugiura, J. Virol. 64:700-705, 1990). He...
journal_title:Journal of virology
pub_type: 杂志文章
doi:10.1128/JVI.72.11.8690-8696.1998
更新日期:1998-11-01 00:00:00
abstract::Equine infectious anemia virus (EIAV) provides a natural model system by which immunological control of lentivirus infections may be studied. To date, no detailed study addressing in parallel both the humoral and cellular immune responses induced in horses upon infection by EIAV has been conducted. Therefore, we initi...
journal_title:Journal of virology
pub_type: 杂志文章
doi:10.1128/JVI.71.5.3840-3852.1997
更新日期:1997-05-01 00:00:00
abstract::The VP24 protein plays an essential, albeit poorly understood role in the filovirus life cycle. VP24 is only 30% identical between Marburg virus and the ebolaviruses. Furthermore, VP24 from the ebolaviruses is immunosuppressive, while that of Marburg virus is not. The crystal structure of Marburg virus VP24, presented...
journal_title:Journal of virology
pub_type: 杂志文章
doi:10.1128/JVI.03565-13
更新日期:2014-05-01 00:00:00
abstract::The addition of 25 mug of protamine sulfate per ml to lysozyme-ethylenediamine-tetraacetic acid spheroplasts of Escherichia coli stimulates transfection not only for T1 phage deoxyribonucleic acid (DNA; Hotz and Mauser, 1969) but also for the following phage DNA species: lambda, 10,000-fold to an efficiency of 10(-3) ...
journal_title:Journal of virology
pub_type: 杂志文章
doi:10.1128/JVI.7.5.646-650.1971
更新日期:1971-05-01 00:00:00
abstract::The murine polyomavirus (Py) enters mouse fibroblasts and kidney epithelial cells via an endocytic pathway that is caveola-independent (as well as clathrin-independent). In contrast, uptake of simian virus 40 into the same cells is dependent on caveola. Following the initial uptake of Py, both microtubules and microfi...
journal_title:Journal of virology
pub_type: 杂志文章
doi:10.1128/jvi.77.4.2615-2622.2003
更新日期:2003-02-01 00:00:00
abstract::An adeno-associated virus (AAV) genome with a Lys-to-His (K340H) mutation in the consensus nucleotide triphosphate binding site of the rep gene has a dominant-negative DNA replication phenotype in vivo. We expressed both wild-type (Rep78) and mutant (Rep78NTP) proteins in two helper-free expression systems consisting ...
journal_title:Journal of virology
pub_type: 杂志文章
doi:10.1128/JVI.66.2.1236-1240.1992
更新日期:1992-02-01 00:00:00
abstract::Herpes simplex virus establishes latent infections in the nuclei of sensory neurons. These infections are characterized by the abundant expression of a series of 5' coterminal transcripts termed the latency-associated transcripts (LATs). Available evidence indicates that LAT expression is specifically regulated in lat...
journal_title:Journal of virology
pub_type: 杂志文章
doi:10.1128/JVI.70.11.7424-7432.1996
更新日期:1996-11-01 00:00:00
abstract::Moloney murine leukemia virus (M-MuLV) IN-IN protein interactions important for catalysis of strand transfer and unimolecular and bimolecular disintegration reactions were investigated by using a panel of chemically modified M-MuLV IN proteins. Functional complementation of an HHCC-deleted protein (Ndelta105) by an in...
journal_title:Journal of virology
pub_type: 杂志文章
doi:10.1128/JVI.72.2.1691-1698.1998
更新日期:1998-02-01 00:00:00
abstract:UNLABELLED:Viral myocarditis, which is most prevalently caused by coxsackievirus B3 (CVB3), is a serious clinical condition characterized by excessive myocardial inflammation. Recent studies suggest that regulation of protein acetylation levels by inhibiting histone deacetylase (HDAC) activity modulates inflammatory re...
journal_title:Journal of virology
pub_type: 杂志文章
doi:10.1128/JVI.01028-15
更新日期:2015-10-01 00:00:00
abstract::Vaccinia virus replication is inhibited by etoposide and mitoxantrone even though poxviruses do not encode the type II topoisomerases that are the specific targets of these drugs. Furthermore, one can isolate drug-resistant virus carrying mutations in the viral DNA ligase and yet the ligase is not known to exhibit sen...
journal_title:Journal of virology
pub_type: 杂志文章
doi:10.1128/JVI.02723-07
更新日期:2008-06-01 00:00:00
abstract::The natural life cycle of alphaviruses, a group of plus-strand RNA viruses, involves transmission to vertebrate hosts via mosquitoes. Chronic infections are established in mosquitoes (and usually in mosquito cell cultures), but infection of susceptible vertebrate cells typically results in rapid shutoff of host mRNA t...
journal_title:Journal of virology
pub_type: 杂志文章
doi:10.1128/JVI.73.5.3854-3865.1999
更新日期:1999-05-01 00:00:00
abstract::ABT-378, a new human immunodeficiency virus type 1 (HIV-1) protease inhibitor which is significantly more active than ritonavir in cell culture, is currently under investigation for the treatment of AIDS. Development of viral resistance to ABT-378 in vitro was studied by serial passage of HIV-1 (pNL4-3) in MT-4 cells....
journal_title:Journal of virology
pub_type: 杂志文章
doi:10.1128/JVI.72.9.7532-7541.1998
更新日期:1998-09-01 00:00:00
abstract::Hepatitis C virus (HCV) nonstructural protein 4B (NS4B) is an integral membrane protein, which plays an important role in the organization and function of the HCV replication complex (RC). Although much is understood about its amphipathic N-terminal and C-terminal domains, we know very little about the role of the tra...
journal_title:Journal of virology
pub_type: 杂志文章
doi:10.1128/JVI.02298-10
更新日期:2011-07-01 00:00:00
abstract::Infection of mouse L-cell spinner cultures by vesicular stomatitis virus (VSV) effected the selective translation of viral mRNA by 4h after viral adsorption. Cell-free systems prepared from mock- and VSV-infected cells reflected this phenomenon; protein synthesis was reduced in the virus-infected cell lysate by approx...
journal_title:Journal of virology
pub_type: 杂志文章
doi:10.1128/JVI.41.3.781-791.1982
更新日期:1982-03-01 00:00:00
abstract::The human herpes simplex virus (HSV) protein VP16 induces formation of a transcriptional regulatory complex with two cellular factors-the POU homeodomain transcription factor Oct-1 and the cell proliferation factor HCF-1-to activate viral immediate-early-gene transcription. Although the cellular role of Oct-1 in trans...
journal_title:Journal of virology
pub_type: 杂志文章
doi:10.1128/JVI.75.24.12402-12411.2001
更新日期:2001-12-01 00:00:00
abstract::At a low pH, the influenza virus hemagglutinin (HA) undergoes conformational changes that promote membrane fusion. While the critical role of fusion peptide release from the trimer interface has been demonstrated previously, the role of globular head dissociation in the overall fusion mechanism remains unclear. To inv...
journal_title:Journal of virology
pub_type: 杂志文章
doi:10.1128/JVI.66.8.4940-4950.1992
更新日期:1992-08-01 00:00:00
abstract::Nipah virus is an emerging, highly pathogenic, zoonotic virus of the Paramyxoviridae family. Human transmission occurs by close contact with infected animals, the consumption of contaminated food, or, occasionally, via other infected individuals. Currently, we lack therapeutic or prophylactic treatments for Nipah viru...
journal_title:Journal of virology
pub_type: 杂志文章
doi:10.1128/JVI.01461-17
更新日期:2017-11-14 00:00:00
abstract::A recombinant vesicular stomatitis virus (VSV-PeGFP-M-MmRFP) encoding enhanced green fluorescent protein fused in frame with P (PeGFP) in place of P and a fusion matrix protein (monomeric red fluorescent protein fused in frame at the carboxy terminus of M [MmRFP]) at the G-L gene junction, in addition to wild-type (wt...
journal_title:Journal of virology
pub_type: 杂志文章
doi:10.1128/JVI.01668-08
更新日期:2009-03-01 00:00:00
abstract::Apoptosis of virus-infected cells occurs either as a direct response to viral infection or upon recognition of infection by the host immune response. Apoptosis reduces production of new virus from these cells, and therefore viruses have evolved inhibitory mechanisms. We previously showed that laboratory strains of her...
journal_title:Journal of virology
pub_type: 杂志文章
doi:10.1128/JVI.73.11.8950-8957.1999
更新日期:1999-11-01 00:00:00
abstract::Three late transcripts have been mapped to the vaccinia virus 7.1-kilobase (kb) EcoRI F fragment, which is located approximately 85 kb from the left end of the viral genome. Hybrid selection and translation of RNA have demonstrated that these mRNAs encode three polypeptides with apparent molecular weights of 32,000 (3...
journal_title:Journal of virology
pub_type: 杂志文章
doi:10.1128/JVI.49.2.510-520.1984
更新日期:1984-02-01 00:00:00
abstract::We previously demonstrated that expression of bcl-2 in Madin-Darby canine kidney (MDCK) cells blocks influenza virus-induced apoptosis and DNA fragmentation. We show here that expression of bcl-2 also reduces the level of infectious virus production and the spread of virus in MDCK cell cultures infected at a low multi...
journal_title:Journal of virology
pub_type: 杂志文章
doi:10.1128/JVI.70.1.663-666.1996
更新日期:1996-01-01 00:00:00
abstract::The major inducible 70-kDa heat shock protein (hsp70) is host protective in a mouse model of measles virus (MeV) brain infection. Transgenic constitutive expression of hsp70 in neurons, the primary target of MeV infection, abrogates neurovirulence in neonatal H-2(d) congenic C57BL/6 mice. A significant level of protec...
journal_title:Journal of virology
pub_type: 杂志文章
doi:10.1128/JVI.02710-12
更新日期:2013-01-01 00:00:00
abstract::Foamy viruses (FVs) are the least known retroviruses commonly found in primates, cats, horses, and cattle. Although FVs are considered apathogenic, simian and feline FVs have been shown to be associated with some transient health abnormalities in animal models. Currently, data regarding the course of infection with bo...
journal_title:Journal of virology
pub_type: 杂志文章
doi:10.1128/JVI.02447-12
更新日期:2013-03-01 00:00:00
abstract:UNLABELLED:Phenotypic diversity in prion diseases can be specified by prion strains in which biological traits are propagated through an epigenetic mechanism mediated by distinct PrP(Sc) conformations. We investigated the role of host-dependent factors on phenotypic diversity of chronic wasting disease (CWD) in differe...
journal_title:Journal of virology
pub_type: 杂志文章
doi:10.1128/JVI.01586-15
更新日期:2015-10-01 00:00:00
abstract::The HTLV-1 singly spliced open reading frame I protein, p12(I), is highly unstable and appears to be necessary for persistent infection in rabbits. Here we demonstrate that p12(I) forms dimers through two putative leucine zipper domains and that its stability is augmented by specific proteasome inhibitors. p12(I) is u...
journal_title:Journal of virology
pub_type: 杂志文章
doi:10.1128/JVI.73.8.6460-6467.1999
更新日期:1999-08-01 00:00:00
abstract::Gene expression of human immunodeficiency virus (HIV) is modulated by both cellular transcription factors, which bind to cis-acting regulatory elements in the HIV-1 long terminal repeat (LTR) and the viral transactivator, tat. The enhancer element in the HIV-1 LTR which extends from -103 to -82 is critical for gene ex...
journal_title:Journal of virology
pub_type: 杂志文章
doi:10.1128/JVI.68.2.1002-1009.1994
更新日期:1994-02-01 00:00:00
abstract::The human genome encodes over 500 microRNAs (miRNAs), small RNAs (19 to 26 nucleotides [nt]) that regulate the expressions of diverse cellular genes. Many cellular processes are altered through a variety of mechanisms by human cytomegalovirus (HCMV) infection. We asked whether HCMV infection leads to changes in the ex...
journal_title:Journal of virology
pub_type: 杂志文章
doi:10.1128/JVI.00961-08
更新日期:2008-09-01 00:00:00
abstract::Influenza A viruses of the H9N2 subtype are endemic in poultry in many Eurasian countries and have occasionally caused clinical respiratory diseases in humans. While some avian H9N2 viruses have glutamine (Q) at amino acid position 226 of the hemagglutinin (HA) receptor-binding site, an increasing number of isolates h...
journal_title:Journal of virology
pub_type: 杂志文章
doi:10.1128/JVI.02827-06
更新日期:2007-05-01 00:00:00