Abstract
The Rex proteins of human T-cell leukemia virus types I and II (HTLV-I and HTLV-II) induce cytoplasmic expression of unspliced gag-pol mRNA and singly spliced env mRNA and are critical for virus replication. Two rex gene products, p27rex and p21rex of HTLV-I and p26rex and p24rex of HTLV-II, have been detected in HTLV-infected cells; however, the structural and biological relationship of the proteins has not been clearly elucidated. Endoproteinase digestion and phosphoamino acid analysis of HTLV-II Rex indicated that p24rex has the same amino acid backbone as p26rex and that the larger apparent molecular size of p26rex is attributable to serine phosphorylation.
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Selected References
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- Beemon K., Hunter T. Characterization of Rous sarcoma virus src gene products synthesized in vitro. J Virol. 1978 Nov;28(2):551–566. doi: 10.1128/jvi.28.2.551-566.1978. [DOI] [PMC free article] [PubMed] [Google Scholar]
- Chen I. S., McLaughlin J., Gasson J. C., Clark S. C., Golde D. W. Molecular characterization of genome of a novel human T-cell leukaemia virus. Nature. 1983 Oct 6;305(5934):502–505. doi: 10.1038/305502a0. [DOI] [PubMed] [Google Scholar]
- Cleveland D. W., Fischer S. G., Kirschner M. W., Laemmli U. K. Peptide mapping by limited proteolysis in sodium dodecyl sulfate and analysis by gel electrophoresis. J Biol Chem. 1977 Feb 10;252(3):1102–1106. [PubMed] [Google Scholar]
- Cullen B. R. Trans-activation of human immunodeficiency virus occurs via a bimodal mechanism. Cell. 1986 Sep 26;46(7):973–982. doi: 10.1016/0092-8674(86)90696-3. [DOI] [PubMed] [Google Scholar]
- Green P. L., Xie Y. M., Chen I. S. The internal methionine codons of human T-cell leukemia virus type II rex gene are not required for p24rex production or virus replication and transformation. J Virol. 1990 Oct;64(10):4914–4921. doi: 10.1128/jvi.64.10.4914-4921.1990. [DOI] [PMC free article] [PubMed] [Google Scholar]
- 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]
- Nagashima K., Yoshida M., Seiki M. A single species of pX mRNA of human T-cell leukemia virus type I encodes trans-activator p40x and two other phosphoproteins. J Virol. 1986 Nov;60(2):394–399. doi: 10.1128/jvi.60.2.394-399.1986. [DOI] [PMC free article] [PubMed] [Google Scholar]
- Radke K., Gilmore T., Martin G. S. Transformation by Rous sarcoma virus: a cellular substrate for transformation-specific protein phosphorylation contains phosphotyrosine. Cell. 1980 Oct;21(3):821–828. doi: 10.1016/0092-8674(80)90445-6. [DOI] [PubMed] [Google Scholar]
- Rosenblatt J. D., Cann A. J., Slamon D. J., Smalberg I. S., Shah N. P., Fujii J., Wachsman W., Chen I. S. HTLV-II transactivation is regulated by the overlapping tax/rex nonstructural genes. Science. 1988 May 13;240(4854):916–919. doi: 10.1126/science.2834826. [DOI] [PubMed] [Google Scholar]
- Shima H., Takano M., Shimotohno K., Miwa M. Identification of p26Xb and p24Xb of human T-cell leukemia virus type II. FEBS Lett. 1986 Dec 15;209(2):289–294. doi: 10.1016/0014-5793(86)81129-2. [DOI] [PubMed] [Google Scholar]