Abstract:
:Mutants of bacteriophage T4D that are defective in genes 42 (dCMP hydroxymethylase), 46 (DNA exonuclease), and 56 (dCTPase) produce limited amounts of phage DNA in Escherichia coli B. In this DNA, glucoylated 5-hydroxymethylcytosine is completely replaced by cytosine. We found that this DNA rapidly becomes fragmented in vivo to at least 16 discrete bands as visualized on agarose gels subjected to electrophoresis. The sizes of the fragments ranged from more than 20 to less than 2 kilobase pairs. When DNAs from two of these bands were radioactively labeled in vitro by nick translation and hybridized to XbaI restriction fragments of cytosine-containing T4 DNA, evidence was obtained that the two bands are genetically distinct, i.e., they contain DNA from different parts of the T4 genome. Mutational inactivation of T4 endonuclease II (gene denA) prevented the fragmentation. Three different mutations in T4 endonuclease IV (gene denB) caused the same minor changes in the pattern of fragments. We conclude that T4 endonuclease II is required, and endonuclease IV is involved to a minor extent, in the in vivo production of these cytosine-containing T4 DNA fragments. We view these DNA fragments as "restriction fragments" since they represent degradation products of DNA "foreign" to T4, they are of discrete size, and they are genetically distinct. Thus, this report may represent the first, direct in vivo demonstration of discretely sized genetically distinct DNA restriction fragments.
journal_name
J Viroljournal_title
Journal of virologyauthors
Carlson K,Wiberg JSdoi
10.1128/JVI.48.1.18-30.1983subject
Has Abstractpub_date
1983-10-01 00:00:00pages
18-30issue
1eissn
0022-538Xissn
1098-5514journal_volume
48pub_type
杂志文章abstract::Bluetongue virus (BTV), a member of the Reoviridae family, is an insect-borne animal pathogen. Virus release from infected cells is predominantly by cell lysis, but some BTV particles are also released from the plasma membrane. The nonstructural protein NS3 has been implicated in this process. Using alternate initiato...
journal_title:Journal of virology
pub_type: 杂志文章
doi:10.1128/JVI.02352-10
更新日期:2011-05-01 00:00:00
abstract::Integrated retroviruses or retroviral vectors may be transcriptionally inactive although their promoter-enhancer regions are able to direct transcription in the host cell. We have used single-gene retroviral vectors with a long terminal repeat-directed neo marker gene to determine if the level of transcription relates...
journal_title:Journal of virology
pub_type: 杂志文章
doi:10.1128/JVI.68.9.5596-5601.1994
更新日期:1994-09-01 00:00:00
abstract::Persistent infection with hepatitis C virus (HCV) is a major cause of chronic liver diseases. The aim of this study was to identify host cell factor(s) participating in the HCV replication complex (RC) and to clarify the regulatory mechanisms of viral genome replication dependent on the host-derived factor(s) identifi...
journal_title:Journal of virology
pub_type: 杂志文章
doi:10.1128/JVI.02179-08
更新日期:2009-05-01 00:00:00
abstract::The retroviral Gag protein plays the central role in the assembly process and can form membrane-enclosed, virus-like particles in the absence of any other viral products. These particles are similar to authentic virions in density and size. Three small domains of the human immunodeficiency virus type 1 (HIV-1) Gag pro...
journal_title:Journal of virology
pub_type: 杂志文章
doi:10.1128/JVI.72.6.4667-4677.1998
更新日期:1998-06-01 00:00:00
abstract::Kilham rat virus (KRV) contains linear, single-stranded DNA in the virion. The fate of radioactive viral DNA was followed after infection of monolayer cells. Within 60 min after infection of cells, 28 to 42% of the parental viral DNA is converted to a new form. This new DNA form is believed to be double stranded and l...
journal_title:Journal of virology
pub_type: 杂志文章
doi:10.1128/JVI.11.2.299-305.1973
更新日期:1973-02-01 00:00:00
abstract:UNLABELLED:Nonhuman primates (NHPs) are a historically important source of zoonotic viruses and are a gold-standard model for research on many human pathogens. However, with the exception of simian immunodeficiency virus (SIV) (family Retroviridae), the blood-borne viruses harbored by these animals in the wild remain i...
journal_title:Journal of virology
pub_type: 杂志文章
doi:10.1128/JVI.00573-16
更新日期:2016-07-11 00:00:00
abstract::In vitro analysis of the catalytic DNA polymerase encoded by vaccinia virus has demonstrated that it is innately distributive, catalyzing the addition of <10 nucleotides per primer-template binding event in the presence of 8 mM MgCl(2) or 40 mM NaCl (W. F. McDonald and P. Traktman, J. Biol. Chem. 269:31190-31197, 1994...
journal_title:Journal of virology
pub_type: 杂志文章
doi:10.1128/JVI.75.24.12298-12307.2001
更新日期:2001-12-01 00:00:00
abstract::The efficiency and specificity of gene transfer with human adenovirus (hAd)-derived gene transfer vectors would be improved if the native viral tropism could be modified. Here, we demonstrate that the minor capsid protein IX (pIX), which is present in 240 copies in the Ad capsid, can be exploited as an anchor for hete...
journal_title:Journal of virology
pub_type: 杂志文章
doi:10.1128/jvi.78.7.3470-3479.2004
更新日期:2004-04-01 00:00:00
abstract::A viral mRNA of the late kinetic class expressed by murine cytomegalovirus (MCMV) contains an open reading frame (ORF) whose predicted protein, designated MCK-1, has homology to beta chemokines (M. R. MacDonald, X.-Y. Li, and H. W. Virgin IV, J. Virol. 71:1671-1678, 1997). The present study analyzed further the struct...
journal_title:Journal of virology
pub_type: 杂志文章
doi:10.1128/JVI.73.5.3682-3691.1999
更新日期:1999-05-01 00:00:00
abstract::Infection of the central nervous system (CNS) by several viruses can lead to upregulation of proinflammatory cytokines and chemokines. In immunocompetent adults, these molecules induce prominent inflammatory infiltrates. However, with immunosuppressive retroviruses, such as human immunodeficiency virus (HIV), little C...
journal_title:Journal of virology
pub_type: 杂志文章
doi:10.1128/JVI.75.6.2848-2856.2001
更新日期:2001-03-01 00:00:00
abstract::CD8+ T cells are the key cellular effectors mediating the clearance of hepatitis B virus (HBV) infections. However, early immunological events surrounding the priming of HBV-specific CD8+ T cell responses remain poorly understood. This study examined the importance of priming location and the relative contribution of ...
journal_title:Journal of virology
pub_type: 杂志文章
doi:10.1128/JVI.00920-18
更新日期:2018-10-12 00:00:00
abstract::The spindles of Anomala cuprea entomopoxvirus (AncuEPV), which are composed of glycoprotein fusolin, are known to enhance the peroral infectivity of AncuEPV itself and of nucleopolyhedroviruses. This has been demonstrated to involve the disruption of intestinal peritrophic membrane (PM), composed of chitin matrix, gly...
journal_title:Journal of virology
pub_type: 杂志文章
doi:10.1128/JVI.01605-08
更新日期:2008-12-01 00:00:00
abstract::Subcutaneous injection of FK506 (10 mg/kg of body weight) completely blocked the clonal expansion of staphylococcal enterotoxin A (SEA)-reactive T cells in healthy (control) mice after SEA injection but did not disturb it in mice with murine AIDS (MAIDS) caused by infection with LP-BM5 murine leukemia virus. MAIDS mic...
journal_title:Journal of virology
pub_type: 杂志文章
doi:10.1128/JVI.71.1.746-749.1997
更新日期:1997-01-01 00:00:00
abstract::Following infection by pairs of reovirus isolates consisting of combinations of reovirus T1 Lang, T2 Jones, or T3 Dearing, we found that one of the isolates interfered with the yield of progeny RNA derived from the other parents. The most significant interference was produced by T2 Jones or T3 Dearing, when mixed with...
journal_title:Journal of virology
pub_type: 杂志文章
doi:10.1128/JVI.68.10.6667-6671.1994
更新日期:1994-10-01 00:00:00
abstract::Human cytomegalovirus (HCMV) major immediate-early protein IE1 is an abundant 72-kDa nuclear phosphoprotein that is thought to play an important role in efficient triggering of the lytic cycle, especially at low multiplicity of infection. The best-known properties of IE1 at present are its transient targeting to punct...
journal_title:Journal of virology
pub_type: 杂志文章
doi:10.1128/JVI.75.22.10683-10695.2001
更新日期:2001-11-01 00:00:00
abstract::The D4R gene of vaccinia virus encodes a functional uracil-DNA glycosylase that is essential for viral viability (D. T. Stuart, C. Upton, M. A. Higman, E. G. Niles, and G. McFadden, J. Virol. 67:2503-2513, 1993), and a D4R mutant, ts4149, confers a conditional lethal defect in viral DNA replication (A. K. Millns, M. S...
journal_title:Journal of virology
pub_type: 杂志文章
doi:10.1128/JVI.70.11.7965-7973.1996
更新日期:1996-11-01 00:00:00
abstract::We have recently shown that live attenuated virus vaccines produced on chicken-derived cells contain low levels of particle-associated reverse transcriptase (RT). In both virus and corresponding control harvests produced on chicken embryo fibroblasts, these activities were present at significantly higher concentration...
journal_title:Journal of virology
pub_type: 杂志文章
doi:10.1128/JVI.71.4.3005-3012.1997
更新日期:1997-04-01 00:00:00
abstract::Human cytomegalovirus (HCMV) is a prototypic member of the betaherpesvirus family. The HCMV virion is composed of a large DNA genome encapsidated within a nucleocapsid, which is wrapped within an inner proteinaceous tegument and an outer lipid envelope containing viral glycoproteins. Although genome encapsidation clea...
journal_title:Journal of virology
pub_type: 杂志文章
doi:10.1128/jvi.76.10.5147-5155.2002
更新日期:2002-05-01 00:00:00
abstract::Influenza A virus matrix protein M1 is involved in multiple stages of the viral infectious cycle. Despite its functional importance, our present understanding of this essential viral protein is limited. The roles of a small subset of specific amino acids have been reported, but a more comprehensive understanding of th...
journal_title:Journal of virology
pub_type: 杂志文章
doi:10.1128/JVI.00161-19
更新日期:2019-06-14 00:00:00
abstract::We report the use of a cDNA microarray to monitor global transcriptional responses of the chestnut blight fungus, Cryphonectria parasitica, to infection by mild and severe isolates of virulence-attenuating hypoviruses that share 87 to 93% and 90 to 98% identity at the nucleotide and amino acid levels, respectively. In...
journal_title:Journal of virology
pub_type: 杂志文章
doi:10.1128/jvi.78.8.4145-4155.2004
更新日期:2004-04-01 00:00:00
abstract::The DNAs of the five nondefective adenovirus 2 (Ad2)-simian virus 40 (SV40) hybrid viruses contain overlapping segments of the early region of wild-type SV40 DNA. The complementary DNA strands of these five viruses have been separated with synthetic polyribonucleotides in isopycnic cesium chloride gradients. The relat...
journal_title:Journal of virology
pub_type: 杂志文章
doi:10.1128/JVI.13.3.677-689.1974
更新日期:1974-03-01 00:00:00
abstract::The matrix (M) protein of vesicular stomatitis virus (VSV) is a potent inhibitor in vivo of transcription by all three host RNA polymerases (RNAP). In the case of host RNA polymerase II (RNAPII), the inhibition is due to lack of activity of the TATA-binding protein (TBP), which is a subunit of the basal transcription ...
journal_title:Journal of virology
pub_type: 杂志文章
doi:10.1128/JVI.75.9.4453-4458.2001
更新日期:2001-05-01 00:00:00
abstract::The regressing and conventional strains of Friend virus were compared by neutralization assays, sodium dodecyl sulfate-polyacrylamide gel electrophoresis, and tryptic peptide mapping of the individual viral components. Neutralization rates of the two viruses differed in the presence of monospecific anti-gp70 antiserum...
journal_title:Journal of virology
pub_type: 杂志文章
doi:10.1128/JVI.33.3.1083-1096.1980
更新日期:1980-03-01 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::Viral attenuation may be due to lowered efficiency of certain steps essential for viral multiplication. For the construction of less neurovirulent strains of poliovirus in vitro, we introduced deletions into the 5' noncoding sequence (742 nucleotides long) of the genomes of the Mahoney and Sabin 1 strains of polioviru...
journal_title:Journal of virology
pub_type: 杂志文章
doi:10.1128/JVI.63.12.5354-5363.1989
更新日期:1989-12-01 00:00:00
abstract:UNLABELLED:Herpes simplex virus (HSV) replicates in the skin and mucous membranes, and initiates lytic or latent infections in sensory neurons. Assembly of progeny virions depends on the essential large tegument protein pUL36 of 3,164 amino acid residues that links the capsids to the tegument proteins pUL37 and VP16. O...
journal_title:Journal of virology
pub_type: 杂志文章
doi:10.1128/JVI.03167-15
更新日期:2016-05-12 00:00:00
abstract::Norovirus (NV) gastroenteritis is a major contributor to global morbidity and mortality, yet little is known about immune mechanisms leading to NV control. Previous studies using the murine norovirus (MNV) model have established a key role for T cells in MNV clearance. Despite these advances, important questions remai...
journal_title:Journal of virology
pub_type: 杂志文章
doi:10.1128/JVI.03389-12
更新日期:2013-06-01 00:00:00
abstract::Vaccine-elicited humoral immune responses comprise an array of antibody forms and specificities, with only a fraction contributing to protective host immunity. Elucidation of antibody effector functions responsible for protective immunity against human immunodeficiency virus type 1 (HIV-1) acquisition is a major goal ...
journal_title:Journal of virology
pub_type: 杂志文章
doi:10.1128/JVI.01552-17
更新日期:2018-03-14 00:00:00
abstract::Antibody-dependent enhancement of flavivirus infection, which except for dengue virus is without clear proof in vivo, is still under debate. Recently, postexposure immunoglobulin prophylaxis against tick-borne encephalitis virus, a flavivirus, was claimed to possibly have worsened the outcome of infection due to antib...
journal_title:Journal of virology
pub_type: 杂志文章
doi:10.1128/JVI.71.4.2921-2927.1997
更新日期:1997-04-01 00:00:00
abstract:UNLABELLED:Identification and characterization of CD8(+) T cells effectively controlling HIV-1 variants are necessary for the development of AIDS vaccines and for studies of AIDS pathogenesis, although such CD8(+) T cells have been only partially identified. In this study, we sought to identify CD8(+) T cells controlli...
journal_title:Journal of virology
pub_type: 杂志文章
doi:10.1128/JVI.00020-15
更新日期:2015-05-01 00:00:00