Abstract:
:In order to analyze the function of VPg amplification in aphthoviruses, we have undertaken the first mutational analysis of the repetitive VPg-coding region using an improved foot-and-mouth disease virus (FMDV) cDNA clone from which infective viral RNA was synthesized. A set of VPg mutants was constructed by site-directed mutagenesis which includes different VPg deletion mutations, a VPg insertion mutation, and amino acid residue replacement mutations that interfere with binding of the VPg protein to the viral RNA and with its proteolytic processing. Our results revealed that an amazing flexibility in the number of VPgs is tolerated in FMDV. Optimal viability is given when three VPgs are encoded. Deletion as well as insertion of one VPg gene still resulted in infective particle production. Infective particle formation was observed as long as one VPg remained intact. No obvious differences in the individual VPg molecules with regard to their promoting viral RNA synthesis were observed, indicating that all three VPgs can act equally in FMDV replication. Mutant polyprotein processing was comparable to that of the wild-type virus. However, VPg mutants showed reduced viral RNA synthesis levels after infection. The levels of viral RNA synthesis and infective particle formation were found to correlate with the number of functional VPgs left in the mutant virus. These findings suggest a direct VPg gene dosage effect on viral RNA synthesis, with a secondary effect on infective particle formation.
journal_name
J Viroljournal_title
Journal of virologyauthors
Falk MM,Sobrino F,Beck Edoi
10.1128/JVI.66.4.2251-2260.1992subject
Has Abstractpub_date
1992-04-01 00:00:00pages
2251-60issue
4eissn
0022-538Xissn
1098-5514journal_volume
66pub_type
杂志文章abstract::Epstein-Barr virus (EBV), a member of human gammaherpesvirus, infects mainly B cells. EBV has two alternative life cycles, latent and lytic, and is reactivated occasionally from the latent stage to the lytic cycle. To combat EBV-associated disorders, understanding the molecular mechanisms of the EBV lytic replication ...
journal_title:Journal of virology
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journal_title:Journal of virology
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doi:10.1128/JVI.38.3.886-894.1981
更新日期:1981-06-01 00:00:00
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journal_title:Journal of virology
pub_type: 杂志文章
doi:10.1128/JVI.27.1.164-171.1978
更新日期:1978-07-01 00:00:00
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journal_title:Journal of virology
pub_type: 杂志文章
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journal_title:Journal of virology
pub_type: 杂志文章
doi:10.1128/JVI.01420-08
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journal_title:Journal of virology
pub_type: 杂志文章
doi:10.1128/JVI.52.3.1011-1012.1984
更新日期:1984-12-01 00:00:00
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journal_title:Journal of virology
pub_type: 杂志文章
doi:10.1128/jvi.74.7.3413-3417.2000
更新日期:2000-04-01 00:00:00
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pub_type: 杂志文章
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journal_title:Journal of virology
pub_type: 杂志文章
doi:10.1128/JVI.68.11.7178-7187.1994
更新日期:1994-11-01 00:00:00
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journal_title:Journal of virology
pub_type: 杂志文章
doi:10.1128/JVI.68.5.3397-3400.1994
更新日期:1994-05-01 00:00:00
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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
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journal_title:Journal of virology
pub_type: 杂志文章
doi:10.1128/JVI.67.11.6469-6475.1993
更新日期:1993-11-01 00:00:00
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journal_title:Journal of virology
pub_type: 杂志文章
doi:10.1128/JVI.03043-15
更新日期:2016-01-06 00:00:00
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journal_title:Journal of virology
pub_type: 杂志文章
doi:10.1128/JVI.50.3.739-747.1984
更新日期:1984-06-01 00:00:00
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journal_title:Journal of virology
pub_type: 杂志文章
doi:10.1128/JVI.00114-12
更新日期:2012-05-01 00:00:00
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journal_title:Journal of virology
pub_type: 杂志文章
doi:10.1128/JVI.63.6.2543-2549.1989
更新日期:1989-06-01 00:00:00
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journal_title:Journal of virology
pub_type: 杂志文章
doi:10.1128/jvi.76.14.7000-7009.2002
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journal_title:Journal of virology
pub_type: 杂志文章
doi:10.1128/JVI.78.11.6024-6032.2004
更新日期:2004-06-01 00:00:00
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journal_title:Journal of virology
pub_type: 杂志文章
doi:10.1128/JVI.72.3.2141-2149.1998
更新日期:1998-03-01 00:00:00
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journal_title:Journal of virology
pub_type: 杂志文章
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更新日期:2017-01-18 00:00:00
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journal_title:Journal of virology
pub_type: 杂志文章
doi:10.1128/JVI.6.5.628-636.1970
更新日期:1970-11-01 00:00:00
abstract:UNLABELLED:Cell culture (cc)-derived hepatitis B virus (HBV) can infect differentiated HepaRG cells, but efficient infection requires addition of polyethylene glycol (PEG) during inoculation. Identification of sodium taurocholate cotransporting polypeptide (NTCP) as an HBV receptor enabled ccHBV infection of NTCP recon...
journal_title:Journal of virology
pub_type: 杂志文章
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更新日期:2016-08-26 00:00:00
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journal_title:Journal of virology
pub_type: 杂志文章
doi:10.1128/JVI.67.8.5056-5061.1993
更新日期:1993-08-01 00:00:00
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journal_title:Journal of virology
pub_type: 杂志文章
doi:10.1128/JVI.01192-15
更新日期:2015-10-21 00:00:00
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journal_title:Journal of virology
pub_type: 杂志文章
doi:10.1128/JVI.01439-08
更新日期:2009-01-01 00:00:00
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journal_title:Journal of virology
pub_type: 杂志文章
doi:10.1128/jvi.74.24.11800-11810.2000
更新日期:2000-12-01 00:00:00
abstract::Several aspects of the terminal stages of T4 head maturation were investigated using ts and am mutants blocked at single steps of the assembly pathway. We had previously found that cells infected with mutants of gene 13, e.g., tsN38 and amE609, accumulated both stable (10 to 20%)- and fragile (80%)-filled head precurs...
journal_title:Journal of virology
pub_type: 杂志文章
doi:10.1128/JVI.17.2.550-567.1976
更新日期:1976-02-01 00:00:00
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journal_title:Journal of virology
pub_type: 杂志文章
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更新日期:2009-12-01 00:00:00
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journal_title:Journal of virology
pub_type: 杂志文章
doi:10.1128/JVI.01743-19
更新日期:2020-01-17 00:00:00