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. 1992 Aug;66(8):4824–4833. doi: 10.1128/jvi.66.8.4824-4833.1992

Role of TAR RNA splicing in translational regulation of simian immunodeficiency virus from rhesus macaques.

G A Viglianti 1, E P Rubinstein 1, K L Graves 1
PMCID: PMC241310  PMID: 1629957

Abstract

The untranslated leader sequences of rhesus macaque simian immunodeficiency virus mRNAs form a stable secondary structure, TAR. This structure can be modified by RNA splicing. In this study, the role of TAR splicing in virus replication was investigated. The proportion of viral RNAs containing a spliced TAR structure is high early after infection and decreases at later times. Moreover, proviruses containing mutations which prevent TAR splicing are significantly delayed in replication. These mutant viruses require approximately 20 days to achieve half-maximal virus production, in contrast to wild-type viruses, which require approximately 8 days. We attribute this delay to the inefficient translation of unspliced-TAR-containing mRNAs. The molecular basis for this translational effect was examined in in vitro assays. We found that spliced-TAR-containing mRNAs were translated up to 8.5 times more efficiently than were similar mRNAs containing an unspliced TAR leader. Furthermore, these spliced-TAR-containing mRNAs were more efficiently associated with ribosomes. We postulate that the level of TAR splicing provides a balance for the optimal expression of both viral proteins and genomic RNA and therefore ultimately controls the production of infectious virions.

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Selected References

These references are in PubMed. This may not be the complete list of references from this article.

  1. Arya S. K., Guo C., Josephs S. F., Wong-Staal F. Trans-activator gene of human T-lymphotropic virus type III (HTLV-III). Science. 1985 Jul 5;229(4708):69–73. doi: 10.1126/science.2990040. [DOI] [PubMed] [Google Scholar]
  2. Arya S. K. Human and simian immunodeficiency retroviruses: activation and differential transactivation of gene expression. AIDS Res Hum Retroviruses. 1988 Jun;4(3):175–186. doi: 10.1089/aid.1988.4.175. [DOI] [PubMed] [Google Scholar]
  3. Berkhout B., Gatignol A., Rabson A. B., Jeang K. T. TAR-independent activation of the HIV-1 LTR: evidence that tat requires specific regions of the promoter. Cell. 1990 Aug 24;62(4):757–767. doi: 10.1016/0092-8674(90)90120-4. [DOI] [PubMed] [Google Scholar]
  4. Berkhout B., Jeang K. T. trans activation of human immunodeficiency virus type 1 is sequence specific for both the single-stranded bulge and loop of the trans-acting-responsive hairpin: a quantitative analysis. J Virol. 1989 Dec;63(12):5501–5504. doi: 10.1128/jvi.63.12.5501-5504.1989. [DOI] [PMC free article] [PubMed] [Google Scholar]
  5. Berkhout B., Silverman R. H., Jeang K. T. Tat trans-activates the human immunodeficiency virus through a nascent RNA target. Cell. 1989 Oct 20;59(2):273–282. doi: 10.1016/0092-8674(89)90289-4. [DOI] [PubMed] [Google Scholar]
  6. Colombini S., Arya S. K., Reitz M. S., Jagodzinski L., Beaver B., Wong-Staal F. Structure of simian immunodeficiency virus regulatory genes. Proc Natl Acad Sci U S A. 1989 Jul;86(13):4813–4817. doi: 10.1073/pnas.86.13.4813. [DOI] [PMC free article] [PubMed] [Google Scholar]
  7. Cullen B. R., Greene W. C. Regulatory pathways governing HIV-1 replication. Cell. 1989 Aug 11;58(3):423–426. doi: 10.1016/0092-8674(89)90420-0. [DOI] [PubMed] [Google Scholar]
  8. Cullen B. R. Human immunodeficiency virus as a prototypic complex retrovirus. J Virol. 1991 Mar;65(3):1053–1056. doi: 10.1128/jvi.65.3.1053-1056.1991. [DOI] [PMC free article] [PubMed] [Google Scholar]
  9. Edery I., Petryshyn R., Sonenberg N. Activation of double-stranded RNA-dependent kinase (dsl) by the TAR region of HIV-1 mRNA: a novel translational control mechanism. Cell. 1989 Jan 27;56(2):303–312. doi: 10.1016/0092-8674(89)90904-5. [DOI] [PubMed] [Google Scholar]
  10. Feng S., Holland E. C. HIV-1 tat trans-activation requires the loop sequence within tar. Nature. 1988 Jul 14;334(6178):165–167. doi: 10.1038/334165a0. [DOI] [PubMed] [Google Scholar]
  11. Goff S., Traktman P., Baltimore D. Isolation and properties of Moloney murine leukemia virus mutants: use of a rapid assay for release of virion reverse transcriptase. J Virol. 1981 Apr;38(1):239–248. doi: 10.1128/jvi.38.1.239-248.1981. [DOI] [PMC free article] [PubMed] [Google Scholar]
  12. Green M. R. Pre-mRNA splicing. Annu Rev Genet. 1986;20:671–708. doi: 10.1146/annurev.ge.20.120186.003323. [DOI] [PubMed] [Google Scholar]
  13. Gunnery S., Rice A. P., Robertson H. D., Mathews M. B. Tat-responsive region RNA of human immunodeficiency virus 1 can prevent activation of the double-stranded-RNA-activated protein kinase. Proc Natl Acad Sci U S A. 1990 Nov;87(22):8687–8691. doi: 10.1073/pnas.87.22.8687. [DOI] [PMC free article] [PubMed] [Google Scholar]
  14. Hoxie J. A., Haggarty B. S., Bonser S. E., Rackowski J. L., Shan H., Kanki P. J. Biological characterization of a simian immunodeficiency virus-like retrovirus (HTLV-IV): evidence for CD4-associated molecules required for infection. J Virol. 1988 Aug;62(8):2557–2568. doi: 10.1128/jvi.62.8.2557-2568.1988. [DOI] [PMC free article] [PubMed] [Google Scholar]
  15. Jacobson A. B., Good L., Simonetti J., Zuker M. Some simple computational methods to improve the folding of large RNAs. Nucleic Acids Res. 1984 Jan 11;12(1 Pt 1):45–52. doi: 10.1093/nar/12.1part1.45. [DOI] [PMC free article] [PubMed] [Google Scholar]
  16. Kornfeld H., Riedel N., Viglianti G. A., Hirsch V., Mullins J. I. Cloning of HTLV-4 and its relation to simian and human immunodeficiency viruses. Nature. 1987 Apr 9;326(6113):610–613. doi: 10.1038/326610a0. [DOI] [PubMed] [Google Scholar]
  17. Kozak M. Circumstances and mechanisms of inhibition of translation by secondary structure in eucaryotic mRNAs. Mol Cell Biol. 1989 Nov;9(11):5134–5142. doi: 10.1128/mcb.9.11.5134. [DOI] [PMC free article] [PubMed] [Google Scholar]
  18. Kozak M. Influences of mRNA secondary structure on initiation by eukaryotic ribosomes. Proc Natl Acad Sci U S A. 1986 May;83(9):2850–2854. doi: 10.1073/pnas.83.9.2850. [DOI] [PMC free article] [PubMed] [Google Scholar]
  19. Kozak M. Structural features in eukaryotic mRNAs that modulate the initiation of translation. J Biol Chem. 1991 Oct 25;266(30):19867–19870. [PubMed] [Google Scholar]
  20. Kozak M. The scanning model for translation: an update. J Cell Biol. 1989 Feb;108(2):229–241. doi: 10.1083/jcb.108.2.229. [DOI] [PMC free article] [PubMed] [Google Scholar]
  21. Muesing M. A., Smith D. H., Capon D. J. Regulation of mRNA accumulation by a human immunodeficiency virus trans-activator protein. Cell. 1987 Feb 27;48(4):691–701. doi: 10.1016/0092-8674(87)90247-9. [DOI] [PubMed] [Google Scholar]
  22. Mullis K. B., Faloona F. A. Specific synthesis of DNA in vitro via a polymerase-catalyzed chain reaction. Methods Enzymol. 1987;155:335–350. doi: 10.1016/0076-6879(87)55023-6. [DOI] [PubMed] [Google Scholar]
  23. Nakamaye K. L., Eckstein F. Inhibition of restriction endonuclease Nci I cleavage by phosphorothioate groups and its application to oligonucleotide-directed mutagenesis. Nucleic Acids Res. 1986 Dec 22;14(24):9679–9698. doi: 10.1093/nar/14.24.9679. [DOI] [PMC free article] [PubMed] [Google Scholar]
  24. Padgett R. A., Grabowski P. J., Konarska M. M., Seiler S., Sharp P. A. Splicing of messenger RNA precursors. Annu Rev Biochem. 1986;55:1119–1150. doi: 10.1146/annurev.bi.55.070186.005351. [DOI] [PubMed] [Google Scholar]
  25. Parkin N. T., Cohen E. A., Darveau A., Rosen C., Haseltine W., Sonenberg N. Mutational analysis of the 5' non-coding region of human immunodeficiency virus type 1: effects of secondary structure on translation. EMBO J. 1988 Sep;7(9):2831–2837. doi: 10.1002/j.1460-2075.1988.tb03139.x. [DOI] [PMC free article] [PubMed] [Google Scholar]
  26. Pelletier J., Sonenberg N. Insertion mutagenesis to increase secondary structure within the 5' noncoding region of a eukaryotic mRNA reduces translational efficiency. Cell. 1985 Mar;40(3):515–526. doi: 10.1016/0092-8674(85)90200-4. [DOI] [PubMed] [Google Scholar]
  27. Pelletier J., Sonenberg N. The involvement of mRNA secondary structure in protein synthesis. Biochem Cell Biol. 1987 Jun;65(6):576–581. doi: 10.1139/o87-074. [DOI] [PubMed] [Google Scholar]
  28. Pestka S., Langer J. A., Zoon K. C., Samuel C. E. Interferons and their actions. Annu Rev Biochem. 1987;56:727–777. doi: 10.1146/annurev.bi.56.070187.003455. [DOI] [PubMed] [Google Scholar]
  29. Queen C., Baltimore D. Immunoglobulin gene transcription is activated by downstream sequence elements. Cell. 1983 Jul;33(3):741–748. doi: 10.1016/0092-8674(83)90016-8. [DOI] [PubMed] [Google Scholar]
  30. Rosen C. A., Sodroski J. G., Haseltine W. A. The location of cis-acting regulatory sequences in the human T cell lymphotropic virus type III (HTLV-III/LAV) long terminal repeat. Cell. 1985 Jul;41(3):813–823. doi: 10.1016/s0092-8674(85)80062-3. [DOI] [PubMed] [Google Scholar]
  31. Roy S., Delling U., Chen C. H., Rosen C. A., Sonenberg N. A bulge structure in HIV-1 TAR RNA is required for Tat binding and Tat-mediated trans-activation. Genes Dev. 1990 Aug;4(8):1365–1373. doi: 10.1101/gad.4.8.1365. [DOI] [PubMed] [Google Scholar]
  32. Selby M. J., Bain E. S., Luciw P. A., Peterlin B. M. Structure, sequence, and position of the stem-loop in tar determine transcriptional elongation by tat through the HIV-1 long terminal repeat. Genes Dev. 1989 Apr;3(4):547–558. doi: 10.1101/gad.3.4.547. [DOI] [PubMed] [Google Scholar]
  33. SenGupta D. N., Berkhout B., Gatignol A., Zhou A. M., Silverman R. H. Direct evidence for translational regulation by leader RNA and Tat protein of human immunodeficiency virus type 1. Proc Natl Acad Sci U S A. 1990 Oct;87(19):7492–7496. doi: 10.1073/pnas.87.19.7492. [DOI] [PMC free article] [PubMed] [Google Scholar]
  34. SenGupta D. N., Silverman R. H. Activation of interferon-regulated, dsRNA-dependent enzymes by human immunodeficiency virus-1 leader RNA. Nucleic Acids Res. 1989 Feb 11;17(3):969–978. doi: 10.1093/nar/17.3.969. [DOI] [PMC free article] [PubMed] [Google Scholar]
  35. Sodroski J., Patarca R., Rosen C., Wong-Staal F., Haseltine W. Location of the trans-activating region on the genome of human T-cell lymphotropic virus type III. Science. 1985 Jul 5;229(4708):74–77. doi: 10.1126/science.2990041. [DOI] [PubMed] [Google Scholar]
  36. Tamm J., Polisky B. Structural analysis of RNA molecules involved in plasmid copy number control. Nucleic Acids Res. 1983 Sep 24;11(18):6381–6397. doi: 10.1093/nar/11.18.6381. [DOI] [PMC free article] [PubMed] [Google Scholar]
  37. Viglianti G. A., Mullins J. I. Functional comparison of transactivation by simian immunodeficiency virus from rhesus macaques and human immunodeficiency virus type 1. J Virol. 1988 Dec;62(12):4523–4532. doi: 10.1128/jvi.62.12.4523-4532.1988. [DOI] [PMC free article] [PubMed] [Google Scholar]
  38. Viglianti G. A., Sharma P. L., Mullins J. I. Simian immunodeficiency virus displays complex patterns of RNA splicing. J Virol. 1990 Sep;64(9):4207–4216. doi: 10.1128/jvi.64.9.4207-4216.1990. [DOI] [PMC free article] [PubMed] [Google Scholar]

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