Abstract:
:The replication of positive-strand RNA viral genomes involves various cis-acting RNA sequences. Generally, regulatory RNA sequences are present at or near genomic termini; however, internal replication elements (IREs) also exist. Here we report the structural and functional characterization of an IRE present in the readthrough portion of the p92 polymerase gene of Tomato bushy stunt virus. Analysis of this element in the context of a noncoding defective interfering RNA revealed a functional core structure composed of two noncontiguous segments of sequence that interact with each other to form an extended helical conformation. IRE activity required maintenance of several base-paired sections as well as two distinct structural features: (i) a short, highly conserved segment that can potentially form two different and mutually exclusive structures and (ii) an internal loop that contains a critical CC mismatch. The IRE was also shown to play an essential role within the context of the viral genome. In vivo analysis with novel RNA-based temperature-sensitive genomic mutants and translationally active subgenomic viral replicons revealed the following about the IRE: (i) it is active in the positive strand, (ii) it is dispensable late in the viral RNA replication process, and (iii) it is functionally inhibited by active translation over its sequence. Together, these results suggest that IRE activity is required in the cytosol at an early step in the viral replication process, such as template recruitment and/or replicase complex assembly.
journal_name
J Viroljournal_title
Journal of virologyauthors
Monkewich S,Lin HX,Fabian MR,Xu W,Na H,Ray D,Chernysheva OA,Nagy PD,White KAdoi
10.1128/JVI.79.8.4848-4858.2005subject
Has Abstractpub_date
2005-04-01 00:00:00pages
4848-58issue
8eissn
0022-538Xissn
1098-5514pii
79/8/4848journal_volume
79pub_type
杂志文章abstract::Herpesviruses encode a set of core proteins essential for lytic replication of their genomes. Three of these proteins form a tripartite helix-primase complex that, in the case of Epstein-Barr virus (EBV), consists of the helicase BBLF4, the primase BSLF1, and the linker protein BBLF2/3. BBLF2/3 and its homologs in the...
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abstract::The molecular defect in the nonconditional B-tropic MuLV pol mutant, clone 23 (Gerwin et al., J. Virol. 31:741-751, 1979), has been characterized by recombinant DNA technology. The entire mutant genome was cloned from an EcoRI digest of integrated cellular DNA into bacteriophage lambda Charon 4A and then subcloned at ...
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doi:10.1128/jvi.74.2.975-986.2000
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pub_type: 杂志文章
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pub_type: 杂志文章
doi:10.1128/JVI.75.14.6710-6713.2001
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abstract::Prior studies have demonstrated that a small proportion of blood lymphocytes from patients with human cytomegalovirus (HCMV) infection express only the viral immediate-early (IE) genes (L. Einhorn and A. Ost, J. Infect. Dis. 149:207-214, 1984; G. P. A. Rice, R. D. Schrier, and M. B. A. Oldstone, Proc. Natl. Acad. Sci....
journal_title:Journal of virology
pub_type: 杂志文章
doi:10.1128/JVI.63.7.3026-3033.1989
更新日期:1989-07-01 00:00:00
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doi:10.1128/JVI.02486-06
更新日期:2007-03-01 00:00:00
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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.00049-09
更新日期:2009-07-01 00:00:00
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journal_title:Journal of virology
pub_type: 杂志文章
doi:10.1128/JVI.66.7.4546-4550.1992
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journal_title:Journal of virology
pub_type: 杂志文章
doi:10.1128/JVI.61.2.516-525.1987
更新日期:1987-02-01 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:1990-02-01 00:00:00
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journal_title:Journal of virology
pub_type: 杂志文章
doi:10.1128/JVI.72.4.3495-3500.1998
更新日期:1998-04-01 00:00:00
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journal_title:Journal of virology
pub_type: 杂志文章
doi:10.1128/JVI.75.22.10906-10911.2001
更新日期:2001-11-01 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:2002-06-01 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:2015-12-01 00:00:00
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pub_type: 杂志文章
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更新日期:2021-01-28 00:00:00
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journal_title:Journal of virology
pub_type: 杂志文章
doi:10.1128/JVI.26.2.243-248.1978
更新日期:1978-05-01 00:00:00
abstract::Arenaviruses can cause lethal hemorrhagic fevers in humans with few preventative and therapeutic measures. The arenaviral glycoprotein stable signal peptide (SSP) is unique among signal peptides in that it is an integral component of the mature glycoprotein complex (GPC) and plays important roles not only in GPC expre...
journal_title:Journal of virology
pub_type: 杂志文章
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更新日期:2016-10-28 00:00:00
abstract::Viral infection induces production of type I interferons (IFNs), which stimulate the expression of a variety of antiviral factors to inhibit viral replication. To establish effective infection, viruses need to develop strategies to evade the immune responses. A neurovirulent Sindbis virus strain with neuroinvasive pro...
journal_title:Journal of virology
pub_type: 杂志文章
doi:10.1128/JVI.01487-16
更新日期:2016-10-28 00:00:00