Abstract:
:The hepadnavirus P gene contains amino acid sequences which share homology with all known RNases H. In this study, we made four mutants in which single amino acids of the duck hepatitis B virus (DHBV) RNase H region were altered. In two of them, amino acids at locations comprising the putative catalytic site were changed, while the remaining mutants had alterations at amino acids conserved among hepadnaviruses. Transfection of these mutant genomes into permissive cells resulted in synthesis of several discrete viral nucleic acid species, ranging in apparent sizes from approximately 500 to 3,000 bp, numbered I, II, III, IV, and V. While the locations of the species were similar in all mutants, the proportions of the species varied among the mutants. Analysis of the nucleic acid species revealed that they were hybrid molecules of RNA and minus-strand DNA, indicating that the RNase H activity was missing or greatly reduced in these mutants. Primer extension experiments showed that the mutant viruses initiated minus-strand viral DNA synthesis normally. The 3' termini of minus-strand DNA in species II, III, and IV were mapped just downstream of nucleotides 1659, 1220, and 721, respectively. Species V contained essentially full-length minus-strand viral DNA. A parallel amino acid change in the putative catalytic site of the HBV RNase H domain resulted in accumulation of low-molecular-weight hybrid molecules consisting of RNA and minus-strand DNA and similar in size and pattern to those seen with DHBV. These studies demonstrate experimentally the involvement of the C-terminal portion of the P gene in RNase H activity in both DHBV and human hepatitis B virus and indicate that the amino acids essential for RNase H activity of hepadnavirus P protein are also important for the efficient elongation of minus-strand viral DNA.
journal_name
J Viroljournal_title
Journal of virologyauthors
Chen Y,Marion PLdoi
10.1128/JVI.70.9.6151-6156.1996subject
Has Abstractpub_date
1996-09-01 00:00:00pages
6151-6issue
9eissn
0022-538Xissn
1098-5514journal_volume
70pub_type
杂志文章abstract::Equine infectious anemia virus (EIAV) is an equine lentivirus similar to HIV-1, targets host immune cells, and causes a life-long infection in horses. The Chinese live EIAV vaccine is attenuated from long-term passaging of a highly virulent strain in vitro The parent pathogenic strain (EIAVDLV34) induces a host inflam...
journal_title:Journal of virology
pub_type: 杂志文章
doi:10.1128/JVI.00653-19
更新日期:2019-10-15 00:00:00
abstract:UNLABELLED:Venezuelan equine encephalitis virus (VEEV) is an important human and animal pathogen, for which no safe and efficient vaccines or therapeutic means have been developed. Viral particle assembly and budding processes represent potential targets for therapeutic intervention. However, our understanding of the m...
journal_title:Journal of virology
pub_type: 杂志文章
doi:10.1128/JVI.02680-15
更新日期:2015-12-09 00:00:00
abstract::Previous studies have indicated that B cells make a significant contribution to the resolution of influenza virus infection. To determine how B cells participate in the control of the infection, we transferred intact, major histocompatibility complex class II (MHC-II)-negative or B-cell receptor (BCR)-transgenic splee...
journal_title:Journal of virology
pub_type: 杂志文章
doi:10.1128/JVI.79.10.5943-5951.2005
更新日期:2005-05-01 00:00:00
abstract::Primate lentiviruses use chemokine coreceptors in addition to the CD4 receptor to initiate virus infection. Simian immunodeficiency virus (SIV) productively infects human cells expressing CD4 and the human allele of the chemokine coreceptor CCR-5 as efficiently as it infects macaque cells expressing human CD4, suggest...
journal_title:Journal of virology
pub_type: 杂志文章
doi:10.1128/JVI.71.5.3932-3939.1997
更新日期:1997-05-01 00:00:00
abstract::Interferon (IFN) signal transduction involves interferon regulatory factors (IRF). Kaposi's sarcoma-associated herpesvirus (KSHV) encodes four IRF homologues: viral IRF 1 (vIRF-1) to vIRF-4. Previous functional studies revealed that the first exon of vIRF-2 inhibited alpha/beta interferon (IFN-alpha/beta) signaling. W...
journal_title:Journal of virology
pub_type: 杂志文章
doi:10.1128/JVI.80.6.3092-3097.2006
更新日期:2006-03-01 00:00:00
abstract::The ribonucleic acid (RNA) of murine leukemia virus (MLV) Rauscher strain was observed by the aid of electron microscopy with the use of the protein monolayer technique. RNA was observed directly after release from virus particles or after isolation by sedimentation in sucrose density gradients. Molecules were found i...
journal_title:Journal of virology
pub_type: 杂志文章
doi:10.1128/JVI.4.4.460-474.1969
更新日期:1969-10-01 00:00:00
abstract::The HXLF (HindIII-X left reading frame) gene family is a group of five genes that share one or two regions of homology and are arranged in tandem within the short unique component of the human cytomegalovirus genome (K. Weston and B.G. Barrell, J. Mol. Biol. 192:177-208, 1986). These genes were cloned into an SP6 expr...
journal_title:Journal of virology
pub_type: 杂志文章
doi:10.1128/JVI.62.6.1956-1962.1988
更新日期:1988-06-01 00:00:00
abstract::The phosphoprotein pp65 (ppUL83) of human cytomegalovirus (HCMV) is abundantly synthesized during lytic infection in cultured fibroblasts. As a major constituent of extracellular particles, it gains entry to infected cells immediately after adsorption and subsequently translocates to the cell nucleus. This efficient t...
journal_title:Journal of virology
pub_type: 杂志文章
doi:10.1128/JVI.69.10.5959-5968.1995
更新日期:1995-10-01 00:00:00
abstract::Infection of macaque monkeys with simian immunodeficiency virus (SIV) is probably the best animal model currently available for studying acquired immunodeficiency syndrome. In this report, we describe three infectious molecular clones of SIVmac and one of human immunodeficiency virus type 2 (HIV-2) and their use in th...
journal_title:Journal of virology
pub_type: 杂志文章
doi:10.1128/JVI.62.12.4691-4696.1988
更新日期:1988-12-01 00:00:00
abstract::Measles virus has two glycoproteins. The larger glycoprotein (HA) is composed of 76,000-dalton subunits that are bound by disulfide bonds. The smaller glycoprotein (F) appears to contain a glucosamine-rich portion that is linked to an unglycosylated protein by disulfide bonds. ...
journal_title:Journal of virology
pub_type: 杂志文章
doi:10.1128/JVI.25.2.687-692.1978
更新日期:1978-02-01 00:00:00
abstract::Recombinant vaccinia viruses that express defective retroviral vectors upon a single infection event in normal host cells were constructed. The gag-pol and envelope genes and a retroviral vector unit were inserted as vaccinia virus promoter-controlled transcription units at three separate loci. The triple recombinant ...
journal_title:Journal of virology
pub_type: 杂志文章
doi:10.1128/jvi.77.12.7017-7025.2003
更新日期:2003-06-01 00:00:00
abstract::Our previous studies showed that establishment of murine cytomegalovirus (MCMV) latency in vivo is associated with repression of immediate-early gene expression, deacetylation of histones bound to the major immediate-early promoter (MIEP), changes in patterns of methylation of histones, and recruitment of cellular rep...
journal_title:Journal of virology
pub_type: 杂志文章
doi:10.1128/JVI.02380-09
更新日期:2010-04-01 00:00:00
abstract:UNLABELLED:Virus-like particles (VLPs) built on the Newcastle disease virus (NDV) core proteins, NP and M, and containing two chimeric proteins, F/F and H/G, composed of respiratory syncytial virus (RSV) fusion protein (F) and glycoprotein (G) ectodomains fused to the transmembrane and cytoplasmic domains of the NDV F ...
journal_title:Journal of virology
pub_type: 杂志文章
doi:10.1128/JVI.00384-15
更新日期:2015-07-01 00:00:00
abstract::ETnII elements are mobile members of the repetitive early transposon family of mouse long terminal repeat (LTR) retroelements and have caused a number of mutations by inserting into genes. ETnII sequences lack retroviral genes, but the recent discovery of related MusD retroviral elements with regions similar to gag, p...
journal_title:Journal of virology
pub_type: 杂志文章
doi:10.1128/jvi.77.21.11448-11458.2003
更新日期:2003-11-01 00:00:00
abstract::Human immunodeficiency virus type 1 (HIV-1) impacts multiple lineages of hematopoietic cells, including lymphocytes and macrophages, either by direct infection or indirectly by perturbations of cell networks, leading to generalized immune deficiency. We designed a study to discover, in primary human macrophages, senti...
journal_title:Journal of virology
pub_type: 杂志文章
doi:10.1128/JVI.78.21.11477-11486.2004
更新日期:2004-11-01 00:00:00
abstract::We have previously demonstrated that parainfluenza virus type 3 (PIV3), a significant respiratory pathogen, can markedly inhibit T-cell function in vitro. We now report that the virus potently induces interleukin-10 (IL-10) production by peripheral blood mononuclear cells. The IL-10 produced contributes to viral inhib...
journal_title:Journal of virology
pub_type: 杂志文章
doi:10.1128/JVI.70.7.4845-4848.1996
更新日期:1996-07-01 00:00:00
abstract::The Coccolithoviridae are a group of viruses which infect the marine coccolithophorid microalga Emiliania huxleyi. The Emiliania huxleyi viruses (known as EhVs) described herein have 160- to 180-nm diameter icosahedral structures, have genomes of approximately 400 kbp, and consist of more than 450 predicted coding seq...
journal_title:Journal of virology
pub_type: 杂志文章
doi:10.1128/JVI.07046-11
更新日期:2012-03-01 00:00:00
abstract::Higher-order RNA structures in the 3' untranslated region (3'UTR) of enteroviruses are thought to play a pivotal role in viral negative-strand RNA synthesis. The structure of the 3'UTR was predicted by thermodynamic calculations using the STAR (structural analysis of RNA) computer program and experimentally verified u...
journal_title:Journal of virology
pub_type: 杂志文章
doi:10.1128/JVI.71.1.686-696.1997
更新日期:1997-01-01 00:00:00
abstract::Dengue virus (DENV) is a mosquito-borne flavivirus responsible for dengue disease, a major human health concern for which no specific therapies are available. Like other viruses, DENV relies heavily on the host cellular machinery for productive infection. In this study, we performed a genome-wide CRISPR-Cas9 screen us...
journal_title:Journal of virology
pub_type: 杂志文章
doi:10.1128/JVI.01751-19
更新日期:2020-03-17 00:00:00
abstract::Ocular herpes simplex keratitis (HSK) is a consequence of viral reactivations from trigeminal ganglia (TG) and occurs almost exclusively in the same eye in humans. In our murine oro-ocular (OO) model, herpes simplex virus 1 (HSV-1) inoculation in one side of the lip propagates virus to infect the ipsilateral TG. Repli...
journal_title:Journal of virology
pub_type: 杂志文章
doi:10.1128/JVI.01586-19
更新日期:2019-11-26 00:00:00
abstract::Integrase of human immunodeficiency virus type 1 (HIVIN) consists of 288 amino acids, and its minimum DNA-binding domain (MDBD) (amino acids [aa] 220 to 270) is required for the integration reaction. We produced and characterized four murine monoclonal antibodies (MAbs) to the MDBD of HIVIN (strain LAI). Immunoblot an...
journal_title:Journal of virology
pub_type: 杂志文章
doi:10.1128/JVI.73.5.4475-4480.1999
更新日期:1999-05-01 00:00:00
abstract::Panicum mosaic virus (PMV) is a recently molecularly characterized RNA virus with the unique feature of supporting the replication of two subviral RNAs in a few species of the family Gramineae. The subviral agents include a satellite RNA (satRNA) that is devoid of a coding region and the unrelated satellite panicum mo...
journal_title:Journal of virology
pub_type: 杂志文章
doi:10.1128/JVI.75.11.5429-5432.2001
更新日期:2001-06-01 00:00:00
abstract::Retrovirus replication requires the production of both spliced and unspliced viral RNA from a single RNA transcript. In contrast, cellular RNA precursors with introns almost completely spliced. The cis elements and virus-coded trans factors which determine the extent to which Rous sarcoma virus RNA is spliced to src m...
journal_title:Journal of virology
pub_type: 杂志文章
doi:10.1128/JVI.63.4.1669-1676.1989
更新日期:1989-04-01 00:00:00
abstract::Human herpesvirus 6 (HHV-6)-specific monoclonal antibody (Mab) 9A5D12 reacted with the nucleus of HHV-6 strain GS-infected cells and immunoprecipitated a phosphorylated polypeptide with an approximate size of 41 kDa, designated HHV-6 P41. A 110-kDa polypeptide was also immunoprecipitated by the MAb. These polypeptides...
journal_title:Journal of virology
pub_type: 杂志文章
doi:10.1128/JVI.65.6.2884-2894.1991
更新日期:1991-06-01 00:00:00
abstract::Viruses actively interact with host metabolism because viral replication relies on host cells to provide nutrients and energy. Vaccinia virus (VACV; the prototype poxvirus) prefers glutamine to glucose for efficient replication to the extent that VACV replication is hindered in glutamine-free medium. Remarkably, our d...
journal_title:Journal of virology
pub_type: 杂志文章
doi:10.1128/JVI.01834-18
更新日期:2019-06-14 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:UNLABELLED:The discovery that measles virus (MV) uses the adherens junction protein nectin-4 as its epithelial receptor provides a new vantage point from which to characterize its rapid spread in the airway epithelium. We show here that in well-differentiated primary cultures of airway epithelial cells from human donor...
journal_title:Journal of virology
pub_type: 杂志文章
doi:10.1128/JVI.00821-15
更新日期:2015-07-01 00:00:00
abstract::The murine monoclonal antibody (MAb) 5A8, which is reactive with domain 2 of CD4, blocks human immunodeficiency virus type 1 (HIV-1) infection and syncytium formation of CD4+ cells (L. C. Burkly, D. Olson, R. Shapiro, G. Winkler, J. J. Rosa, D. W. Thomas, C. Williams, and P. Chisholm, J. Immunol., in press). Here we s...
journal_title:Journal of virology
pub_type: 杂志文章
doi:10.1128/JVI.66.8.4784-4793.1992
更新日期:1992-08-01 00:00:00
abstract::The techniques of deoxyribonucleic acid-ribonucleic acid (DNA-RNA) hybridization and immunological precipitation were used to compare the synthesis of adenovirus-specific macromolecules in African green monkey kidney (AGMK) cells infected with adenovirus, an abortive infection, and coinfected with both adenovirus and ...
journal_title:Journal of virology
pub_type: 杂志文章
doi:10.1128/JVI.10.6.1109-1117.1972
更新日期:1972-12-01 00:00:00
abstract::The human papillomavirus (HPV) type 16 (HPV16) E6 protein can stimulate mechanistic target of rapamycin complex 1 (mTORC1) signaling and cap-dependent translation through activation of the PDK1 and mTORC2 kinases. Here we report that HPV18 E6 also enhances cap-dependent translation. The integrity of LXXLL and PDZ prot...
journal_title:Journal of virology
pub_type: 杂志文章
doi:10.1128/JVI.00487-12
更新日期:2012-07-01 00:00:00