Abstract:
:Transfection has been found and characterized in pneumococcus. For replicating omega3 phage DNA extracted from infected cells, transfection was relatively efficient and rose linearly with DNA concentration and quadratically with time, according to T(T - 3.5) min(2). For mature DNA extracted from phage particles, transfection was hardly detectable below 1 mug/ml but increased about as the cube of the DNA concentration up to 100 mug/ml, and was still rising at concentrations over 200 mug/ml. The kinetics suggest a dependence on a mixed cubic function of the time of exposure of cells to mature DNA. Cell and phage DNAs competed with each other for transformation and transfection. Transfection was reduced much more strongly than transformation in cells that were deficient in the membrane-bound endonuclease required for conversion of donor duplex DNA to intracellular single strands; these data agree with the kinetic data in implying that independent entry of segments of two strands is necessary for transfection by replicating omega3 phage DNA and entry of at least three strands is necessary for transfection by mature DNA. To reconcile differing DNA concentration dependences of transfection and transformation with a common entry path, it was necessary to reexamine data on transformation and to recognize that this process continued to rise slowly through the concentration region usually described as "plateau." These results and the transfection data reflect multiple binding and nicking events that occurred on the cell surface before entry. Our conclusion is that transfection in pneumococcus occurs by association inside the cell of segments of single strands of phage DNA that have entered independently, creating gapped structures that need repair synthesis to create infective centers. Physical recombination is therefore automatically a prerequisite to transfection.
journal_name
J Viroljournal_title
Journal of virologyauthors
Porter RD,Guild WRdoi
10.1128/JVI.25.1.60-72.1978subject
Has Abstractpub_date
1978-01-01 00:00:00pages
60-72issue
1eissn
0022-538Xissn
1098-5514journal_volume
25pub_type
杂志文章abstract::The control of human immunodeficiency virus type 1 (HIV-1) associated with particular HLA class I alleles suggests that some CD8(+) T-cell responses may be more effective than others at containing HIV-1. Unfortunately, substantial diversities in the breadth, magnitude, and function of these responses have impaired our...
journal_title:Journal of virology
pub_type: 杂志文章
doi:10.1128/JVI.01061-08
更新日期:2009-02-01 00:00:00
abstract::Hepatitis C virus (HCV) remains a significant threat to the general health of the world's population, and there is a pressing need for the development of new treatments and preventative vaccines. Here, we describe the generation of retrovirus-based pseudoparticles (HCVpp) incorporating a panel of full-length E1E2 clon...
journal_title:Journal of virology
pub_type: 杂志文章
doi:10.1128/JVI.79.17.11095-11104.2005
更新日期:2005-09-01 00:00:00
abstract::The therapeutic efficacy of direct drug infusion into the brain, the target organ of transmissible spongiform encephalopathies, was assessed in transgenic mice intracerebrally infected with 263K scrapie agent. Pentosan polysulfate (PPS) gave the most dramatic prolongation of the incubation period, and amphotericin B h...
journal_title:Journal of virology
pub_type: 杂志文章
doi:10.1128/jvi.78.10.4999-5006.2004
更新日期:2004-05-01 00:00:00
abstract::Poliovirus replicase- and host factor-catalyzed copying of 3'-terminal polyadenylic acid [poly(A)] of poliovirion RNA was studied. Host factor-stimulated synthesis of polyuridylic acid [poly(U)] by the replicase required ATP in addition to UTP. ATP was not required for the oligouridylic acid-primed copying of 3'-termi...
journal_title:Journal of virology
pub_type: 杂志文章
doi:10.1128/JVI.50.2.515-523.1984
更新日期:1984-05-01 00:00:00
abstract::The interaction of the human immunodeficiency virus type 1 (HIV-1) nucleoprotein complex with the cell nuclear import machinery is necessary for viral replication in macrophages and for the establishment of infection in quiescent T lymphocytes. The karyophilic properties of two viral proteins, matrix (MA) and Vpr, are...
journal_title:Journal of virology
pub_type: 杂志文章
doi:10.1128/JVI.70.2.1027-1032.1996
更新日期:1996-02-01 00:00:00
abstract::The herpes simplex virus type 1 genome contains three origins of DNA replication: two copies of oriS and one copy of oriL. Although oriS has been characterized extensively, characterization of oriL has been severely limited by the inability to amplify oriL sequences in an undeleted form in Escherichia coli. We report ...
journal_title:Journal of virology
pub_type: 杂志文章
doi:10.1128/JVI.69.3.1377-1388.1995
更新日期:1995-03-01 00:00:00
abstract::Human T-cell leukemia virus type 1 (HTLV-1) establishes a persistent infection in the host despite a vigorous virus-specific immune response. Here we demonstrate that an HTLV-1-encoded protein, p12(I), resides in the endoplasmic reticulum (ER) and Golgi and physically binds to the free human major histocompatibility c...
journal_title:Journal of virology
pub_type: 杂志文章
doi:10.1128/JVI.75.13.6086-6094.2001
更新日期:2001-07-01 00:00:00
abstract::For the identification of RNA-binding proteins that specifically interact with potato spindle tuber viroid (PSTVd), we subjected a tomato cDNA expression library prepared from viroid-infected leaves to an RNA ligand screening procedure. We repeatedly identified cDNA clones that expressed a protein of 602 amino acids. ...
journal_title:Journal of virology
pub_type: 杂志文章
doi:10.1128/jvi.77.17.9685-9694.2003
更新日期:2003-09-01 00:00:00
abstract::Multiple steps of the life cycle of hepatitis B virus (HBV) are known to be coupled to hepatic metabolism. However, the details of involvement of the hepatic metabolic milieu in HBV infection remain incompletely understood. Hepatic lipid metabolism is controlled by a complicated transcription factor network centered o...
journal_title:Journal of virology
pub_type: 杂志文章
doi:10.1128/JVI.01771-17
更新日期:2018-03-28 00:00:00
abstract::Human immunodeficiency virus type 1 (HIV-1) infection of CD4-positive lymphocytes is accompanied by acute cytopathic effects, i.e., syncytium formation and single-cell lysis. Syncytium formation involves cell-cell fusion mediated by viral envelope glycoproteins on the surface of infected cells and by CD4 glycoproteins...
journal_title:Journal of virology
pub_type: 杂志文章
doi:10.1128/JVI.70.3.1340-1354.1996
更新日期:1996-03-01 00:00:00
abstract::Therapeutic suppression of human immunodeficiency virus type 1 (HIV-1) replication may help elucidate interactions between the host cellular immune responses and HIV-1 infection. We performed a detailed longitudinal evaluation of two subjects before and after the start of highly active antiretroviral therapy (HAART). ...
journal_title:Journal of virology
pub_type: 杂志文章
doi:10.1128/JVI.73.8.6721-6728.1999
更新日期:1999-08-01 00:00:00
abstract::We developed antigen microarrays to profile the breadth, strength, and kinetics of epitope-specific antiviral antibody responses in vaccine trials with a simian-human immunodeficiency virus (SHIV) model for human immunodeficiency virus (HIV) infection. These arrays contained 430 distinct proteins and overlapping pepti...
journal_title:Journal of virology
pub_type: 杂志文章
doi:10.1128/jvi.77.20.11125-11138.2003
更新日期:2003-10-01 00:00:00
abstract::The herpes simplex virus 1 (HSV-1) infected-cell protein 0 (ICP0) has the characteristics of a promiscuous transactivator of genes introduced into cells by infection or transfection. To identify cellular proteins interacting with ICP0, we used a domain of exon II of ICP0 that is known to be crucial for regulatory func...
journal_title:Journal of virology
pub_type: 杂志文章
doi:10.1128/JVI.71.10.7328-7336.1997
更新日期:1997-10-01 00:00:00
abstract::Amphiphilic fatty acid derivatives having a 14- to 20-carbon cis-unsaturated alkyl chain were found to be potent inhibitors of the entry process of the lipid-containing bacteriophage PR4. ...
journal_title:Journal of virology
pub_type: 杂志文章
doi:10.1128/JVI.29.1.413-416.1979
更新日期:1979-01-01 00:00:00
abstract::We have established a genetic assay for the multimerization of retroviral gag polyproteins. This assay is based on the GAL4 two-hybrid system for studying protein-protein interactions (S. Fields and O. Song, Nature (London) 340:245-246, 1989). In our initial experiments, we generated Saccharomyces cerevisiae plasmids ...
journal_title:Journal of virology
pub_type: 杂志文章
doi:10.1128/JVI.66.8.5157-5160.1992
更新日期:1992-08-01 00:00:00
abstract::Duck embryo fibroblast (DEF) and chicken embryo fibroblast (CEF) cultures infected with Marek's disease virus were studied by combined fluorescent antibody and electron microscopy techniques. In both DEF and CEF cultures, cells containing immunofluorescent (IF) antigen also contained herpesvirus particles; conversely,...
journal_title:Journal of virology
pub_type: 杂志文章
doi:10.1128/JVI.5.1.79-90.1970
更新日期:1970-01-01 00:00:00
abstract::Herpes simplex virus (HSV) latency in neurons remains poorly understood, and the heterogeneity of the sensory nervous system complicates mechanistic studies. In this study, we used primary culture of adult trigeminal ganglion (TG) mouse neurons in microfluidic devices and an in vivo model to examine the subtypes of se...
journal_title:Journal of virology
pub_type: 杂志文章
doi:10.1128/JVI.00430-18
更新日期:2018-06-13 00:00:00
abstract::The inbred mouse strain RIII has long been known for shedding large amounts of mouse mammary tumor virus (MMTV) particles in milk and for the development of hormone-dependent early mammary tumors at a very high incidence (>90%). We have established one RIII subline (RIII/Sa) that shows a pattern of virus expression an...
journal_title:Journal of virology
pub_type: 杂志文章
doi:10.1128/jvi.78.2.1055-1062.2004
更新日期:2004-01-01 00:00:00
abstract::White root rot, caused by the ascomycete Rosellinia necatrix, is a devastating disease worldwide, particularly in fruit trees in Japan. Here we report on the biological and molecular properties of a novel bipartite double-stranded RNA (dsRNA) virus encompassing dsRNA-1 (8,931 bp) and dsRNA-2 (7,180 bp), which was isol...
journal_title:Journal of virology
pub_type: 杂志文章
doi:10.1128/JVI.01830-09
更新日期:2009-12-01 00:00:00
abstract::Virus-specific cytotoxic T lymphocytes (CTL) exert intense selection pressure on replicating simian immunodeficiency virus (SIV) and human immunodeficiency virus type 1 (HIV-1) in infected individuals. The immunodominant Mamu-A(*)01-restricted Gag p11C, C-M epitope is highly conserved among all sequenced isolates of S...
journal_title:Journal of virology
pub_type: 杂志文章
doi:10.1128/jvi.77.23.12572-12578.2003
更新日期:2003-12-01 00:00:00
abstract::The promoter of the major immediate-early (MIE) genes of human cytomegalovirus (HCMV), also referred to as the CMV promoter, possesses a cis-acting element positioned downstream of the TATA box between positions -14 and -1 relative to the transcription start site (+1). We determined the role of the cis-acting element ...
journal_title:Journal of virology
pub_type: 杂志文章
doi:10.1128/JVI.01593-07
更新日期:2008-01-01 00:00:00
abstract::The human T-cell leukemia virus type 1 (HTLV-1) transforming protein, Tax, is a potent transactivator of both viral and cellular gene expression. The ability of Tax to transform cells is believed to depend on its transactivation of cellular-growth-regulatory genes. Expression of proliferating cell nuclear antigen (PCN...
journal_title:Journal of virology
pub_type: 杂志文章
doi:10.1128/JVI.71.2.1181-1190.1997
更新日期:1997-02-01 00:00:00
abstract::The RNA polymerase in the nucleocapsid of Pseudomonas phaseolicola bacteriophage phi 6 transcribed large, medium, and small single-stranded RNA from the viral double-stranded RNA genome by a semiconservative (displacement) mechanism. Approximately 23%, 63%, and 65% of the nucleocapsid particles in the assay mixture sy...
journal_title:Journal of virology
pub_type: 杂志文章
doi:10.1128/JVI.33.2.769-773.1980
更新日期:1980-02-01 00:00:00
abstract::Rhesus cytomegalovirus (RhCMV) infection of macaques exhibits strong similarities to human CMV (HCMV) persistence and pathogenesis. The immunogenicity of DNA vaccines encoding three RhCMV proteins (a truncated version of glycoprotein B lacking the transmembrane region and endodomain [gBDeltaTM], phosphoprotein 65-2 [p...
journal_title:Journal of virology
pub_type: 杂志文章
doi:10.1128/JVI.01708-06
更新日期:2007-02-01 00:00:00
abstract::A Staphylococcus aureus strain was successively cured of three prophages. A lysogenic conversion by a group A phage to production of Panton-Valentine leucocidin and by a group F phage to staphylokinase production could be demonstrated. ...
journal_title:Journal of virology
pub_type: 杂志文章
doi:10.1128/JVI.10.2.318-319.1972
更新日期:1972-08-01 00:00:00
abstract::The major human tRNA(Lys) isoacceptors, and, are selectively packaged into human immunodeficiency virus type 1 (HIV-1) during assembly, where acts as a primer for reverse transcription. Lysyl-tRNA synthetase (LysRS) is also incorporated into HIV-1, independently of tRNA(Lys), via its interaction with Gag, and is a str...
journal_title:Journal of virology
pub_type: 杂志文章
doi:10.1128/jvi.77.18.9817-9822.2003
更新日期:2003-09-01 00:00:00
abstract::Vaccination for human immunodeficiency virus type 1 (HIV-1) remains an elusive goal. Whether an unsuccessful vaccine might not only fail to provoke detectable immune responses but also could actually interfere with subsequent natural immunity upon HIV-1 infection is unknown. We performed detailed assessment of an HIV-...
journal_title:Journal of virology
pub_type: 杂志文章
doi:10.1128/JVI.01720-07
更新日期:2008-03-01 00:00:00
abstract::Defined segments of the transmembrane envelope glycoprotein (gp45) of equine infectious anemia virus were expressed as TrpLE fusion proteins and examined for their reactivity in Western immunoblots against a diverse panel of equine immune sera. The most immunogenic region of gp45 was localized to its amino terminus, p...
journal_title:Journal of virology
pub_type: 杂志文章
doi:10.1128/JVI.65.2.1013-1018.1991
更新日期:1991-02-01 00:00:00
abstract::The 3C region of human rhinovirus 14 was expressed in Escherichia coli. The microbially synthesized protease was functional, since the expressed precursor underwent autoproteolytic processing to generate mature molecules of the expected molecular weight and antigenicity. Mutation of the putative active-site Cys-146 re...
journal_title:Journal of virology
pub_type: 杂志文章
doi:10.1128/JVI.63.12.5037-5045.1989
更新日期:1989-12-01 00:00:00
abstract::Cowpox virus (CPXV) belongs to the genus Orthopoxvirus in the Poxviridae family. It infects a broad range of vertebrates and can cause zoonotic infections. CPXV has the largest genome among the orthopoxviruses and is therefore considered to have the most complete set of genes of all members of the genus. Since CPXV ha...
journal_title:Journal of virology
pub_type: 杂志文章
doi:10.1128/JVI.02385-13
更新日期:2014-01-01 00:00:00