Abstract:
:The mitogen-activated protein (MAP) kinase signal transduction pathway is an intracellular signaling cascade which mediates cellular responses to growth and differentiation factors. The MAP kinase pathway can be activated by a wide range of stimuli dependent on the cell types, and this is normally a transient response. Oncogenes such as ras, src, raf, and mos have been proposed to transform cells in part by prolonging the activated stage of components within this signaling pathway. The human papillomavirus (HPV) oncogenes E6 and E7 play an essential role in the in vitro transformation of primary human keratinocytes and rodent cells. The HPV type 16 E5 gene has also been shown to have weak transforming activity and may enhance the epidermal growth factor (EGF)-mediated signal transduction to the nucleus. In the present study, we have investigated the effects of the oncogenic HPV type 16 E5, E6, and E7 genes on the induction of the MAP kinase signaling pathway. The E5 gene induced an increase in the MAP kinase activity both in the absence and in the presence of EGF. In comparison, the E6 and E7 oncoproteins do not alter the MAP kinase activity or prolong the MAP kinase activity induced with EGF. These findings suggest that E5 may function, at least in part, to enhance the cell response through the MAP kinase pathway. However, the transforming activity of E6 and E7 is not associated with alterations in the MAP kinase pathway. These findings are consistent with E5 enhancing the response to growth factor stimulation.
journal_name
J Viroljournal_title
Journal of virologyauthors
Gu Z,Matlashewski Gdoi
10.1128/JVI.69.12.8051-8056.1995subject
Has Abstractpub_date
1995-12-01 00:00:00pages
8051-6issue
12eissn
0022-538Xissn
1098-5514journal_volume
69pub_type
杂志文章abstract::Japanese encephalitis virus (JEV) is a mosquito-borne pathogenic flavivirus responsible for acute viral encephalitis in humans. The cellular entry of JEV is poorly characterized in terms of molecular requirements and pathways. Here we present a systematic study of the internalization mechanism of JEV in fibroblasts an...
journal_title:Journal of virology
pub_type: 杂志文章
doi:10.1128/JVI.01399-12
更新日期:2013-01-01 00:00:00
abstract::We have previously demonstrated that open reading frame (ORF) 50 and ORF 57 encode transcriptional regulating genes in herpesvirus saimiri. ORF 50, a homolog of Epstein-Barr virus R protein, is a sequence-specific transactivator, whereas ORF 57 acts posttranscriptionally. In this report, we demonstrate that the ORF 57...
journal_title:Journal of virology
pub_type: 杂志文章
doi:10.1128/JVI.72.3.1967-1973.1998
更新日期:1998-03-01 00:00:00
abstract::Murine leukemia viruses isolated from radiation-induced BALB/c leukemias were characterized with respect to viral proteins and RNA. Analysis by sodium dodecyl sulfate-polyacrylamide gel electrophoresis of the viral structural proteins revealed that for p12, p15, p30, and gp70, three of four electrophoretic variants of...
journal_title:Journal of virology
pub_type: 杂志文章
doi:10.1128/JVI.33.2.661-670.1980
更新日期:1980-02-01 00:00:00
abstract::The poliovirus (PV) genome was manipulated by replacing its 2A-encoding sequence with the corresponding sequence of coxsackie B4 virus (CBV4) or human rhinovirus type 2 (HRV2). In vitro translation of the resulting chimeric PV genomes revealed a normal cis-cleavage activity for both heterologous 2A(pro) proteinases in...
journal_title:Journal of virology
pub_type: 杂志文章
doi:10.1128/JVI.69.12.7445-7452.1995
更新日期:1995-12-01 00:00:00
abstract::Nonconservative substitutions for Tyr-115 in the reverse transcriptase (RT) of human immunodeficiency virus type 1 (HIV-1) lead to enzymes displaying lower affinity for deoxynucleoside triphosphates (dNTPs) (A. M. Martín-Hernández, E. Domingo, and L. Menéndez-Arias, EMBO J. 15:4434-4442, 1996). Several mutations at th...
journal_title:Journal of virology
pub_type: 杂志文章
doi:10.1128/JVI.73.8.6293-6298.1999
更新日期:1999-08-01 00:00:00
abstract::Apoptosis is a type of controlled cell death that is essential for development and tissue homeostasis. It also serves as a robust host response against infection by many viruses. The capacity of neurotropic viruses to induce apoptosis strongly correlates with virulence. However, the precise function of apoptosis in vi...
journal_title:Journal of virology
pub_type: 杂志文章
doi:10.1128/JVI.01931-13
更新日期:2013-12-01 00:00:00
abstract::The role of the 5' nontranslated region in the replication of hepatitis A virus (HAV) was studied by analyzing the translation and replication of chimeric RNAs containing the encephalomyocarditis virus (EMCV) internal ribosome entry segment (IRES) and various lengths (237, 151, or 98 nucleotides [nt]) of the 5'-termin...
journal_title:Journal of virology
pub_type: 杂志文章
doi:10.1128/JVI.70.5.2861-2868.1996
更新日期:1996-05-01 00:00:00
abstract::The protease (PR) from human immunodeficiency virus (HIV) is essential for viral replication: this aspartyl protease, active only as a dimer, is responsible for cleavage of the viral polyprotein precursors (Gag and Gag-Pol), to release the functional mature proteins. In this work, we have studied the structure-functio...
journal_title:Journal of virology
pub_type: 杂志文章
doi:10.1128/jvi.77.15.8216-8226.2003
更新日期:2003-08-01 00:00:00
abstract::The adenovirus fiber protein is used for attachment of the virus to a specific receptor on the cell surface. Structurally, the protein consists of a long, thin shaft that protrudes from the vertex of the virus capsid and terminates in a globular domain termed the knob. To verify that the knob is the domain which inter...
journal_title:Journal of virology
pub_type: 杂志文章
doi:10.1128/JVI.68.8.5239-5246.1994
更新日期:1994-08-01 00:00:00
abstract::Two poliovirus mutants were isolated that contain an oligonucleotide linker insertion in the 2C-coding region of the viral genome. One, 2C-31, has a strongly temperature-sensitive phenotype and the other, 2C-32, forms small plaques on HeLa cell monolayers at all temperatures. Both mutants have a severe temperature-sen...
journal_title:Journal of virology
pub_type: 杂志文章
doi:10.1128/JVI.62.11.4016-4021.1988
更新日期:1988-11-01 00:00:00
abstract::The mRNAs of Bunyamwera virus (BUNV), the prototype of the Bunyaviridae family, possess a 5' cap structure but lack a 3' poly(A) tail, a common feature of eukaryotic mRNAs that greatly enhances translation efficiency. Viral mRNAs also contain untranslated regions (UTRs) that flank the coding sequence. Using model viru...
journal_title:Journal of virology
pub_type: 杂志文章
doi:10.1128/JVI.02201-08
更新日期:2009-04-01 00:00:00
abstract::The C-terminal half of the replicase ORF1a polyprotein of the arterivirus equine arteritis virus is processed by a chymotrypsinlike serine protease (SP) (E. J. Snijder et al., J. Biol. Chem. 271:4864-4871, 1996) located in nonstructural protein 4 (nsp4). Three probable SP cleavage sites had previously been identified ...
journal_title:Journal of virology
pub_type: 杂志文章
doi:10.1128/JVI.71.12.9313-9322.1997
更新日期:1997-12-01 00:00:00
abstract:UNLABELLED:Little is known about the antiviral response in mollusks. As in other invertebrates, the interferon signaling pathways have not been identified, and in fact, there is a debate about whether invertebrates possess antiviral immunity similar to that of vertebrates. In marine bivalves, due to their filtering act...
journal_title:Journal of virology
pub_type: 杂志文章
doi:10.1128/JVI.00591-16
更新日期:2016-08-12 00:00:00
abstract::We have investigated the antigenicity of the C- and N-terminal halves of pIX of human adenovirus types 2 and 3 (Ad2 and Ad3) as well as their orientations in virions. We found that only the C-terminal halves of Ad2 pIX and Ad3 pIX reacted in a subgenus-specific manner by enzyme-linked immunosorbent assay and immunoblo...
journal_title:Journal of virology
pub_type: 杂志文章
doi:10.1128/JVI.73.7.6182-6187.1999
更新日期:1999-07-01 00:00:00
abstract::Antigens derived from host cells are detectable in the envelope of human immunodeficiency virus type 1 (HIV-1) and result in a distinctive viral phenotype reflecting that of the host cell. An immunomagnetic capture assay targeting discriminatory host proteins was developed to differentiate between HIV-1 derived from m...
journal_title:Journal of virology
pub_type: 杂志文章
doi:
更新日期:2000-01-01 00:00:00
abstract::Cell-mediated immunity depends in part on appropriate migration and localization of cytotoxic T lymphocytes (CTL), a process regulated by chemokines and adhesion molecules. Many viruses, including human immunodeficiency virus type 1 (HIV-1), encode chemotactically active proteins, suggesting that dysregulation of immu...
journal_title:Journal of virology
pub_type: 杂志文章
doi:10.1128/jvi.78.10.5184-5193.2004
更新日期:2004-05-01 00:00:00
abstract:UNLABELLED:Hepatitis C virus (HCV) is a major cause of chronic hepatitis, liver cirrhosis, and hepatocellular carcinoma in humans. We showed previously that HCV induces autophagy for viral persistence by preventing the innate immune response. Knockdown of autophagy reduces extracellular HCV release, although the precis...
journal_title:Journal of virology
pub_type: 杂志文章
doi:10.1128/JVI.02383-15
更新日期:2015-11-18 00:00:00
abstract::Using gel mobility assays, we have detected two proteins that bind in the U3 region of the 1731 retrotransposon long terminal repeats (between positions -110 and -73) in nuclear extracts from Drosophila melanogaster cultured cells. The first one binds double-stranded DNA, whereas the other binds the mRNA-like strand i...
journal_title:Journal of virology
pub_type: 杂志文章
doi:10.1128/JVI.66.3.1682-1687.1992
更新日期:1992-03-01 00:00:00
abstract::This paper is concerned with the physiological role(s) of T4 phage-coded dihydrofolate reductase, which functions both in DNA precursor metabolism and as a virion protein. (i) We have detected enzyme activity in noninfectious particles produced under restrictive conditions by gene 11 mutants. This supports the conclus...
journal_title:Journal of virology
pub_type: 杂志文章
doi:10.1128/JVI.23.3.645-658.1977
更新日期:1977-09-01 00:00:00
abstract::Recent studies using radiolabeled rotavirus lysates have demonstrated a 35-kilodalton viral protein that binds specifically to the surface of MA104 cells (N. Fukuhara, O. Yoshie, S. Kitakoa, and T. Konno, J. Virol. 62:2209-2218, 1988; M. Sabara, J. Gilchrist, G.R. Hudson, and L.A. Babiuk, J. Virol. 53:58-66, 1985). Th...
journal_title:Journal of virology
pub_type: 杂志文章
doi:10.1128/JVI.64.1.322-330.1990
更新日期:1990-01-01 00:00:00
abstract::Vif(IIIB), which has been a standard model for the viral infectivity factor of human immunodeficiency virus type 1 (HIV-1), binds the cytidine deaminase APOBEC3G (A3G) and induces its degradation, thereby precluding its lethal incorporation into assembling virions. Additionally, Vif(IIIB) less efficiently degrades A3F...
journal_title:Journal of virology
pub_type: 杂志文章
doi:10.1128/JVI.01078-07
更新日期:2008-01-01 00:00:00
abstract::There is an open reading frame in the E3 transcription unit of adenovirus type 3 (Ad3) and Ad7 that could encode a protein of 16 kDa (16K protein). Ad3 and Ad7 are members of subgroup B of human adenoviruses. Using a rabbit antipeptide antiserum, we show that the 16K protein is expressed in Ad3- and Ad7-infected cells...
journal_title:Journal of virology
pub_type: 杂志文章
doi:10.1128/JVI.69.7.4292-4298.1995
更新日期:1995-07-01 00:00:00
abstract::The Epstein-Barr virus (EBV) genome contains an open reading frame, BHRF1, that encodes a presumptive membrane protein with sequence similarity to the proto-oncogene bcl2, which is linked to human B-cell follicular lymphoma. Potential roles for BHRF1 in EBV's ability to growth transform human B cells and to replicate ...
journal_title:Journal of virology
pub_type: 杂志文章
doi:10.1128/JVI.66.4.1899-1906.1992
更新日期:1992-04-01 00:00:00
abstract::The human airway epithelium (HAE) represents the entry port of many human respiratory viruses, including human coronaviruses (HCoVs). Nowadays, four HCoVs, HCoV-229E, HCoV-OC43, HCoV-HKU1, and HCoV-NL63, are known to be circulating worldwide, causing upper and lower respiratory tract infections in nonhospitalized and ...
journal_title:Journal of virology
pub_type: 杂志文章
doi:10.1128/JVI.03368-12
更新日期:2013-06-01 00:00:00
abstract::High-risk human papillomavirus type 16 (HPV-16) and HPV-18 are associated with the majority of human cervical carcinomas, and two viral genes, HPV E6 and E7, are commonly found to be expressed in these cancers. The presence of HPV-16 E7 is sufficient to induce epidermal hyperplasia and epithelial tumors in transgenic ...
journal_title:Journal of virology
pub_type: 杂志文章
doi:10.1128/JVI.71.8.5905-5914.1997
更新日期:1997-08-01 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::pp60v-src is a nonreceptor protein tyrosine kinase that can transform both chicken and rodent fibroblasts. The src homology 2 (SH2) domain of this protein serves a critical role in the regulation of protein tyrosine kinase activity. The host range proteins pp60v-src-L, which contains a deletion of a highly conserved r...
journal_title:Journal of virology
pub_type: 杂志文章
doi:10.1128/JVI.68.11.7267-7274.1994
更新日期:1994-11-01 00:00:00
abstract::The varicella-zoster virus (VZV) open reading frame 54 (ORF54) gene encodes an 87-kDa monomer that oligomerizes to form the VZV portal protein, pORF54. pORF54 was hypothesized to perform a function similar to that of a previously described herpes simplex virus 1 (HSV-1) homolog, pUL6. pUL6 and the associated viral ter...
journal_title:Journal of virology
pub_type: 杂志文章
doi:10.1128/JVI.00376-14
更新日期:2014-07-01 00:00:00
abstract::CD81 has been described as a putative receptor for hepatitis C virus (HCV); however, its role in HCV cell entry has not been characterized due to the lack of an efficient cell culture system. We have examined the role of CD81 in HCV glycoprotein-dependent entry by using a recently developed retroviral pseudotyping sys...
journal_title:Journal of virology
pub_type: 杂志文章
doi:10.1128/jvi.78.3.1448-1455.2004
更新日期:2004-02-01 00:00:00
abstract::The salivary glands of scrapie-affected sheep and healthy controls were investigated for the presence of the pathological prion protein (PrP(Sc)). PrP(Sc) was detected in major (parotid and mandibular) and minor (buccal, labial, and palatine) salivary glands of naturally and experimentally infected sheep. Using Wester...
journal_title:Journal of virology
pub_type: 杂志文章
doi:10.1128/JVI.02148-06
更新日期:2007-05-01 00:00:00