Molecular Analysis of RNA-RNA Interactions between 5’ and 3’ Untranslated Regions during the Initiation of Translation of a Cardiovirulent and a Live-Attenuated Coxsackievirus B3 Strains
Coxsackievirus B3 (CVB3) is a causative agent of viral myocarditis, meningitis and pancreatitis. CVB3 overcome their host cells by usurping the translation machinery to benefit viral gene expression. This is accomplished through alternative translation initiation in a cap independent manner at the v...
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| Format: | Article |
| Language: | English |
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MDPI AG
2013-02-01
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| Series: | International Journal of Molecular Sciences |
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| Online Access: | http://www.mdpi.com/1422-0067/14/3/4525 |
| _version_ | 1811228233709912064 |
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| author | Manel Ben M'hadheb-Gharbi Amira Souii Jawhar Gharbi |
| author_facet | Manel Ben M'hadheb-Gharbi Amira Souii Jawhar Gharbi |
| author_sort | Manel Ben M'hadheb-Gharbi |
| collection | DOAJ |
| description | Coxsackievirus B3 (CVB3) is a causative agent of viral myocarditis, meningitis and pancreatitis. CVB3 overcome their host cells by usurping the translation machinery to benefit viral gene expression. This is accomplished through alternative translation initiation in a cap independent manner at the viral internal ribosomal entry site. The 5’ untranslated region (5’UTR) of CVB3 genomic RNA is highly structured. It is the site of multiple RNA-protein and RNA-RNA interactions and it plays a critical role during translation initiation. Similar to the 5’UTR, CVB3 3’ untranslated region (3’UTR) also contains secondary structural elements consisting of three stem-loops followed by a poly (A) tail sequence. Long-range RNA-RNA interactions between 5’ and 3’ ends of some viral genomes have been observed. Because of their dual role in translation and replication, the 5’ and 3’UTRs represent promising candidates for the study of CVB3 cardiovirulence. Taking into account that efficient initiation of mRNA translation depends on a temporally and spatially orchestrated sequence of protein-protein, protein-RNA and RNA-RNA interactions, and that, at present, little is known about RNA-RNA interactions between CVB3 5’ and 3’UTRs, we aimed in the present study, to assess a possible RNA-RNA interaction between 5’ and 3’UTRs during the initiation of translation of a wild-type and a previously characterized mutant (Sabin3-like) CVB3 strains and to investigate the effect of the Sabin3-like mutation on these potential interactions. For this purpose, “Electrophoretic Mobility Shift” assays were carried out. Data obtained did not show any RNA-RNA direct interactions between the 5’- and 3’- ends. Therefore, we can suggest that the possible mechanism by which 3’UTR enhances CVB3 IRES activity may be by bridging the 5’ to the 3’ end through RNA-protein interaction and not through RNA-RNA direct contact. However, these findings need to be confirmed by carrying out further experiments. |
| first_indexed | 2024-04-12T09:55:54Z |
| format | Article |
| id | doaj.art-d2523ff92c254209bdae419ac263d9b1 |
| institution | Directory Open Access Journal |
| issn | 1422-0067 |
| language | English |
| last_indexed | 2024-04-12T09:55:54Z |
| publishDate | 2013-02-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | International Journal of Molecular Sciences |
| spelling | doaj.art-d2523ff92c254209bdae419ac263d9b12022-12-22T03:37:43ZengMDPI AGInternational Journal of Molecular Sciences1422-00672013-02-011434525454410.3390/ijms14034525Molecular Analysis of RNA-RNA Interactions between 5’ and 3’ Untranslated Regions during the Initiation of Translation of a Cardiovirulent and a Live-Attenuated Coxsackievirus B3 StrainsManel Ben M'hadheb-GharbiAmira SouiiJawhar GharbiCoxsackievirus B3 (CVB3) is a causative agent of viral myocarditis, meningitis and pancreatitis. CVB3 overcome their host cells by usurping the translation machinery to benefit viral gene expression. This is accomplished through alternative translation initiation in a cap independent manner at the viral internal ribosomal entry site. The 5’ untranslated region (5’UTR) of CVB3 genomic RNA is highly structured. It is the site of multiple RNA-protein and RNA-RNA interactions and it plays a critical role during translation initiation. Similar to the 5’UTR, CVB3 3’ untranslated region (3’UTR) also contains secondary structural elements consisting of three stem-loops followed by a poly (A) tail sequence. Long-range RNA-RNA interactions between 5’ and 3’ ends of some viral genomes have been observed. Because of their dual role in translation and replication, the 5’ and 3’UTRs represent promising candidates for the study of CVB3 cardiovirulence. Taking into account that efficient initiation of mRNA translation depends on a temporally and spatially orchestrated sequence of protein-protein, protein-RNA and RNA-RNA interactions, and that, at present, little is known about RNA-RNA interactions between CVB3 5’ and 3’UTRs, we aimed in the present study, to assess a possible RNA-RNA interaction between 5’ and 3’UTRs during the initiation of translation of a wild-type and a previously characterized mutant (Sabin3-like) CVB3 strains and to investigate the effect of the Sabin3-like mutation on these potential interactions. For this purpose, “Electrophoretic Mobility Shift” assays were carried out. Data obtained did not show any RNA-RNA direct interactions between the 5’- and 3’- ends. Therefore, we can suggest that the possible mechanism by which 3’UTR enhances CVB3 IRES activity may be by bridging the 5’ to the 3’ end through RNA-protein interaction and not through RNA-RNA direct contact. However, these findings need to be confirmed by carrying out further experiments.http://www.mdpi.com/1422-0067/14/3/4525CVB35’UTR3’UTRRNA-RNA interactionelectrophoretic mobility shift assay |
| spellingShingle | Manel Ben M'hadheb-Gharbi Amira Souii Jawhar Gharbi Molecular Analysis of RNA-RNA Interactions between 5’ and 3’ Untranslated Regions during the Initiation of Translation of a Cardiovirulent and a Live-Attenuated Coxsackievirus B3 Strains International Journal of Molecular Sciences CVB3 5’UTR 3’UTR RNA-RNA interaction electrophoretic mobility shift assay |
| title | Molecular Analysis of RNA-RNA Interactions between 5’ and 3’ Untranslated Regions during the Initiation of Translation of a Cardiovirulent and a Live-Attenuated Coxsackievirus B3 Strains |
| title_full | Molecular Analysis of RNA-RNA Interactions between 5’ and 3’ Untranslated Regions during the Initiation of Translation of a Cardiovirulent and a Live-Attenuated Coxsackievirus B3 Strains |
| title_fullStr | Molecular Analysis of RNA-RNA Interactions between 5’ and 3’ Untranslated Regions during the Initiation of Translation of a Cardiovirulent and a Live-Attenuated Coxsackievirus B3 Strains |
| title_full_unstemmed | Molecular Analysis of RNA-RNA Interactions between 5’ and 3’ Untranslated Regions during the Initiation of Translation of a Cardiovirulent and a Live-Attenuated Coxsackievirus B3 Strains |
| title_short | Molecular Analysis of RNA-RNA Interactions between 5’ and 3’ Untranslated Regions during the Initiation of Translation of a Cardiovirulent and a Live-Attenuated Coxsackievirus B3 Strains |
| title_sort | molecular analysis of rna rna interactions between 5 and 3 untranslated regions during the initiation of translation of a cardiovirulent and a live attenuated coxsackievirus b3 strains |
| topic | CVB3 5’UTR 3’UTR RNA-RNA interaction electrophoretic mobility shift assay |
| url | http://www.mdpi.com/1422-0067/14/3/4525 |
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