Abstract:
:Due to various advantageous features there is current interest in retroviral vectors derived from primate foamy viruses (PFVs). Two PFV cis-acting sequences have been mapped in the 5' region of the RNA (pre-)genome and in the 3' pol genomic region. In order to genetically separate PFV packaging constructs from vector constructs, we investigated the effect of deletions in the 5' untranslated region (UTR) of PFV packaging constructs and vectors on gene expression and RNA incorporation into viral particles. Our results indicate that the 5' UTR serves different previously unknown functions. First, the R region of the long terminal repeat was found to be required for PFV gag gene expression. This regulation of gene expression appeared to be mainly posttranscriptional. Second, constructs with sequence deletions between the R region and the gag gene start codon packaged as much viral mRNA into particles as the undeleted construct, and RNA from such a 5'-UTR-deleted packaging construct was copackaged into vector-virus particles, together with vector RNA which was preferentially packaged. Finally, in the U5 region a sequence was identified that was required to allow cleavage of the Gag precursor protein by the pol gene-encoded protease, suggesting a role of RNA in PFV particle formation. Taken together, the results indicate that complex interactions of the viral RNA, capsid, and polymerase proteins take place during PFV particle formation and that a clear separation of PFV vector and packaging construct sequences may be difficult to achieve.
journal_name
J Viroljournal_title
Journal of virologyauthors
Heinkelein M,Thurow J,Dressler M,Imrich H,Neumann-Haefelin D,McClure MO,Rethwilm Adoi
10.1128/jvi.74.7.3141-3148.2000subject
Has Abstractpub_date
2000-04-01 00:00:00pages
3141-8issue
7eissn
0022-538Xissn
1098-5514journal_volume
74pub_type
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journal_title:Journal of virology
pub_type: 杂志文章
doi:10.1128/JVI.71.4.3005-3012.1997
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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.58.2.583-591.1986
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pub_type: 杂志文章
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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.63.7.3209-3212.1989
更新日期:1989-07-01 00:00:00
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journal_title:Journal of virology
pub_type: 杂志文章
doi:10.1128/JVI.63.4.1669-1676.1989
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journal_title:Journal of virology
pub_type: 杂志文章
doi:10.1128/JVI.41.2.674-685.1982
更新日期:1982-02-01 00:00:00
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journal_title:Journal of virology
pub_type: 杂志文章
doi:10.1128/JVI.39.3.903-913.1981
更新日期:1981-09-01 00:00:00
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pub_type: 杂志文章
doi:10.1128/JVI.68.7.4251-4261.1994
更新日期:1994-07-01 00:00:00
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journal_title:Journal of virology
pub_type: 杂志文章
doi:10.1128/jvi.77.7.4231-4236.2003
更新日期:2003-04-01 00:00:00
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journal_title:Journal of virology
pub_type: 杂志文章
doi:10.1128/JVI.70.2.992-998.1996
更新日期:1996-02-01 00:00:00
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journal_title:Journal of virology
pub_type: 杂志文章
doi:10.1128/JVI.43.1.348-351.1982
更新日期:1982-07-01 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
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更新日期:1980-09-01 00:00:00
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journal_title:Journal of virology
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更新日期:2004-01-01 00:00:00
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journal_title:Journal of virology
pub_type: 杂志文章
doi:10.1128/JVI.01095-14
更新日期:2014-11-01 00:00:00
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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
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journal_title:Journal of virology
pub_type: 杂志文章
doi:10.1128/JVI.57.1.379-384.1986
更新日期:1986-01-01 00:00:00
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journal_title:Journal of virology
pub_type: 杂志文章
doi:10.1128/JVI.68.2.1258-1263.1994
更新日期:1994-02-01 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:2010-10-01 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:2007-09-01 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:2011-12-01 00:00:00
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journal_title:Journal of virology
pub_type: 杂志文章
doi:10.1128/JVI.63.5.2036-2047.1989
更新日期:1989-05-01 00:00:00
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journal_title:Journal of virology
pub_type: 杂志文章
doi:10.1128/JVI.58.3.825-834.1986
更新日期:1986-06-01 00:00:00