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. 1993 Apr;67(4):2360–2366. doi: 10.1128/jvi.67.4.2360-2366.1993

The p12I, p13II, and p30II proteins encoded by human T-cell leukemia/lymphotropic virus type I open reading frames I and II are localized in three different cellular compartments.

I J Koralnik 1, J Fullen 1, G Franchini 1
PMCID: PMC240398  PMID: 8445734

Abstract

Three protein isoforms are encoded by the human T-cell leukemia/lymphotropic virus type I pX region open reading frames (ORF) I and II through alternative splicing. Both the singly and doubly spliced mRNAs from ORF I encode a single 12-kDa protein (p12I), whereas two distinct proteins of 13 kDa (p13II) and 30 kDa (p30II) are encoded from the ORF II alternatively spliced mRNA. Because the p12I protein is very hydrophobic and poorly immunogenic, we genetically engineered its cDNA by adding a short stretch of amino acids from the highly immunogenic epitope HA1 of influenza virus or the AU1 epitope of bovine papillomavirus. The HA1 epitope was also added to the p13II and p30II proteins, albeit rabbit immune sera raised against synthetic peptides were also available. To determine in which cellular compartments these proteins reside, we transfected the tagged and wild-type cDNAs in HeLa/Tat cells and studied their localization by indirect immunofluorescence. The p12I protein was identified in the cellular endomembranes and, particularly, in the perinuclear area. p13II and p30II were found in the nuclei and nucleoli of the transfected cells, respectively. The presence of the HA1 epitope at the carboxy terminus of p13II and p30II did not interfere with their cellular localization, since the rabbit immune sera demonstrated their presence in the same cellular compartments when the untagged proteins were expressed. The defined localization of these proteins in specific cellular compartments warrants further study of their function.

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Selected References

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

  1. Berneman Z. N., Gartenhaus R. B., Reitz M. S., Jr, Blattner W. A., Manns A., Hanchard B., Ikehara O., Gallo R. C., Klotman M. E. Expression of alternatively spliced human T-lymphotropic virus type I pX mRNA in infected cell lines and in primary uncultured cells from patients with adult T-cell leukemia/lymphoma and healthy carriers. Proc Natl Acad Sci U S A. 1992 Apr 1;89(7):3005–3009. doi: 10.1073/pnas.89.7.3005. [DOI] [PMC free article] [PubMed] [Google Scholar]
  2. Caputo A., Haseltine W. A. Reexamination of the coding potential of the HTLV-1 pX region. Virology. 1992 Jun;188(2):618–627. doi: 10.1016/0042-6822(92)90516-r. [DOI] [PubMed] [Google Scholar]
  3. Ciminale V., Pavlakis G. N., Derse D., Cunningham C. P., Felber B. K. Complex splicing in the human T-cell leukemia virus (HTLV) family of retroviruses: novel mRNAs and proteins produced by HTLV type I. J Virol. 1992 Mar;66(3):1737–1745. doi: 10.1128/jvi.66.3.1737-1745.1992. [DOI] [PMC free article] [PubMed] [Google Scholar]
  4. Coffin J. M. Structure, replication, and recombination of retrovirus genomes: some unifying hypotheses. J Gen Virol. 1979 Jan;42(1):1–26. doi: 10.1099/0022-1317-42-1-1. [DOI] [PubMed] [Google Scholar]
  5. Felber B. K., Paskalis H., Kleinman-Ewing C., Wong-Staal F., Pavlakis G. N. The pX protein of HTLV-I is a transcriptional activator of its long terminal repeats. Science. 1985 Aug 16;229(4714):675–679. doi: 10.1126/science.2992082. [DOI] [PubMed] [Google Scholar]
  6. Franchini G., Wong-Staal F., Gallo R. C. Molecular studies of human T-cell leukemia virus and adult T-cell leukemia. J Invest Dermatol. 1984 Jul;83(1 Suppl):63s–66s. doi: 10.1111/1523-1747.ep12281191. [DOI] [PubMed] [Google Scholar]
  7. Gallo R. C. The first human retrovirus. Sci Am. 1986 Dec;255(6):88–98. doi: 10.1038/scientificamerican1286-88. [DOI] [PubMed] [Google Scholar]
  8. Gessain A., Barin F., Vernant J. C., Gout O., Maurs L., Calender A., de Thé G. Antibodies to human T-lymphotropic virus type-I in patients with tropical spastic paraparesis. Lancet. 1985 Aug 24;2(8452):407–410. doi: 10.1016/s0140-6736(85)92734-5. [DOI] [PubMed] [Google Scholar]
  9. Gessain A., Saal F., Giron M. L., Lasneret J., Lagaye S., Gout O., De Thé G., Sigaux F., Peries J. Cell surface phenotype and human T lymphotropic virus type 1 antigen expression in 12 T cell lines derived from peripheral blood and cerebrospinal fluid of West Indian, Guyanese and African patients with tropical spastic paraparesis. J Gen Virol. 1990 Feb;71(Pt 2):333–341. doi: 10.1099/0022-1317-71-2-333. [DOI] [PubMed] [Google Scholar]
  10. Graf T., Beug H. Avian leukemia viruses: interaction with their target cells in vivo and in vitro. Biochim Biophys Acta. 1978 Nov 17;516(3):269–299. doi: 10.1016/0304-419x(78)90011-2. [DOI] [PubMed] [Google Scholar]
  11. Grassmann R., Dengler C., Müller-Fleckenstein I., Fleckenstein B., McGuire K., Dokhelar M. C., Sodroski J. G., Haseltine W. A. Transformation to continuous growth of primary human T lymphocytes by human T-cell leukemia virus type I X-region genes transduced by a Herpesvirus saimiri vector. Proc Natl Acad Sci U S A. 1989 May;86(9):3351–3355. doi: 10.1073/pnas.86.9.3351. [DOI] [PMC free article] [PubMed] [Google Scholar]
  12. Green P. L., Chen I. S. Regulation of human T cell leukemia virus expression. FASEB J. 1990 Feb 1;4(2):169–175. doi: 10.1096/fasebj.4.2.2404818. [DOI] [PubMed] [Google Scholar]
  13. Hidaka M., Inoue J., Yoshida M., Seiki M. Post-transcriptional regulator (rex) of HTLV-1 initiates expression of viral structural proteins but suppresses expression of regulatory proteins. EMBO J. 1988 Feb;7(2):519–523. doi: 10.1002/j.1460-2075.1988.tb02840.x. [DOI] [PMC free article] [PubMed] [Google Scholar]
  14. Hinuma Y., Nagata K., Hanaoka M., Nakai M., Matsumoto T., Kinoshita K. I., Shirakawa S., Miyoshi I. Adult T-cell leukemia: antigen in an ATL cell line and detection of antibodies to the antigen in human sera. Proc Natl Acad Sci U S A. 1981 Oct;78(10):6476–6480. doi: 10.1073/pnas.78.10.6476. [DOI] [PMC free article] [PubMed] [Google Scholar]
  15. Inoue J., Yoshida M., Seiki M. Transcriptional (p40x) and post-transcriptional (p27x-III) regulators are required for the expression and replication of human T-cell leukemia virus type I genes. Proc Natl Acad Sci U S A. 1987 Jun;84(11):3653–3657. doi: 10.1073/pnas.84.11.3653. [DOI] [PMC free article] [PubMed] [Google Scholar]
  16. Jacobson S., Shida H., McFarlin D. E., Fauci A. S., Koenig S. Circulating CD8+ cytotoxic T lymphocytes specific for HTLV-I pX in patients with HTLV-I associated neurological disease. Nature. 1990 Nov 15;348(6298):245–248. doi: 10.1038/348245a0. [DOI] [PubMed] [Google Scholar]
  17. Kiyokawa T., Seiki M., Iwashita S., Imagawa K., Shimizu F., Yoshida M. p27x-III and p21x-III, proteins encoded by the pX sequence of human T-cell leukemia virus type I. Proc Natl Acad Sci U S A. 1985 Dec;82(24):8359–8363. doi: 10.1073/pnas.82.24.8359. [DOI] [PMC free article] [PubMed] [Google Scholar]
  18. Koralnik I. J., Gessain A., Klotman M. E., Lo Monico A., Berneman Z. N., Franchini G. Protein isoforms encoded by the pX region of human T-cell leukemia/lymphotropic virus type I. Proc Natl Acad Sci U S A. 1992 Sep 15;89(18):8813–8817. doi: 10.1073/pnas.89.18.8813. [DOI] [PMC free article] [PubMed] [Google Scholar]
  19. Koralnik I. J., Lemp J. F., Jr, Gallo R. C., Franchini G. In vitro infection of human macrophages by human T-cell leukemia/lymphotropic virus type I (HTLV-I). AIDS Res Hum Retroviruses. 1992 Nov;8(11):1845–1849. doi: 10.1089/aid.1992.8.1845. [DOI] [PubMed] [Google Scholar]
  20. Lim P. S., Jenson A. B., Cowsert L., Nakai Y., Lim L. Y., Jin X. W., Sundberg J. P. Distribution and specific identification of papillomavirus major capsid protein epitopes by immunocytochemistry and epitope scanning of synthetic peptides. J Infect Dis. 1990 Dec;162(6):1263–1269. doi: 10.1093/infdis/162.6.1263. [DOI] [PubMed] [Google Scholar]
  21. Neil J. C., Onions D. E. Feline leukaemia viruses: molecular biology and pathogenesis. Anticancer Res. 1985 Jan-Feb;5(1):49–63. [PubMed] [Google Scholar]
  22. Nosaka T., Siomi H., Adachi Y., Ishibashi M., Kubota S., Maki M., Hatanaka M. Nucleolar targeting signal of human T-cell leukemia virus type I rex-encoded protein is essential for cytoplasmic accumulation of unspliced viral mRNA. Proc Natl Acad Sci U S A. 1989 Dec;86(24):9798–9802. doi: 10.1073/pnas.86.24.9798. [DOI] [PMC free article] [PubMed] [Google Scholar]
  23. Osame M., Usuku K., Izumo S., Ijichi N., Amitani H., Igata A., Matsumoto M., Tara M. HTLV-I associated myelopathy, a new clinical entity. Lancet. 1986 May 3;1(8488):1031–1032. doi: 10.1016/s0140-6736(86)91298-5. [DOI] [PubMed] [Google Scholar]
  24. Poiesz B. J., Ruscetti F. W., Gazdar A. F., Bunn P. A., Minna J. D., Gallo R. C. Detection and isolation of type C retrovirus particles from fresh and cultured lymphocytes of a patient with cutaneous T-cell lymphoma. Proc Natl Acad Sci U S A. 1980 Dec;77(12):7415–7419. doi: 10.1073/pnas.77.12.7415. [DOI] [PMC free article] [PubMed] [Google Scholar]
  25. Rodgers-Johnson P., Gajdusek D. C., Morgan O. S., Zaninovic V., Sarin P. S., Graham D. S. HTLV-I and HTLV-III antibodies and tropical spastic paraparesis. Lancet. 1985 Nov 30;2(8466):1247–1248. doi: 10.1016/s0140-6736(85)90778-0. [DOI] [PubMed] [Google Scholar]
  26. Ruley H. E. Adenovirus early region 1A enables viral and cellular transforming genes to transform primary cells in culture. Nature. 1983 Aug 18;304(5927):602–606. doi: 10.1038/304602a0. [DOI] [PubMed] [Google Scholar]
  27. Schwartz S., Felber B. K., Benko D. M., Fenyö E. M., Pavlakis G. N. Cloning and functional analysis of multiply spliced mRNA species of human immunodeficiency virus type 1. J Virol. 1990 Jun;64(6):2519–2529. doi: 10.1128/jvi.64.6.2519-2529.1990. [DOI] [PMC free article] [PubMed] [Google Scholar]
  28. Seiki M., Hattori S., Hirayama Y., Yoshida M. Human adult T-cell leukemia virus: complete nucleotide sequence of the provirus genome integrated in leukemia cell DNA. Proc Natl Acad Sci U S A. 1983 Jun;80(12):3618–3622. doi: 10.1073/pnas.80.12.3618. [DOI] [PMC free article] [PubMed] [Google Scholar]
  29. Sodroski J. G., Rosen C. A., Haseltine W. A. Trans-acting transcriptional activation of the long terminal repeat of human T lymphotropic viruses in infected cells. Science. 1984 Jul 27;225(4660):381–385. doi: 10.1126/science.6330891. [DOI] [PubMed] [Google Scholar]
  30. Weiss R. A., Schulz T. F. Transforming properties of the HTLV-I tax gene. Cancer Cells. 1990 Aug-Sep;2(8-9):281–283. [PubMed] [Google Scholar]
  31. Wilson I. A., Niman H. L., Houghten R. A., Cherenson A. R., Connolly M. L., Lerner R. A. The structure of an antigenic determinant in a protein. Cell. 1984 Jul;37(3):767–778. doi: 10.1016/0092-8674(84)90412-4. [DOI] [PubMed] [Google Scholar]

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