HTLV-1 p27rex stabilizes human interleukin-2 receptor α chain mRNA

Hiroshi Kanamori, Noboru Suzuki, Haruhiko Siomi, Tetsuya Nosaka, Akihiko Sato, Hisataka Sabe, Masakazu Hatanaka, Tasuku Honjo

研究成果: Article査読

44 被引用数 (Scopus)


Expression of the pX gene products (p40tax, p27rex and p21X-III) of human T cell leukemia virus type 1 (HTLV-1), which is known to be a causative agent of adult T cell lymphoma/leukemia, induces expression of the interleukin-2 receptor a chain (IL-2Rα) on infected T cells. Comparison of IL-2Rα promoter activities has revealed that the transcriptional activation of the promoter alone cannot explain the large numbers of IL-2Rα expressed on HTLV-1 infected cells. We found that the rates of the IL-2Rα mRNA degradation were greatly reduced in pX-positive cells as compared with pX-negative cells. Simultaneous transfection of the expression vector plasmid containing IL-2Rα cDNA and similar plasmids containing various pX sequences showed that p27rex elongated the half life of IL-2Rα mRNA. As p27rex did not affect the transport of the IL-2Rα mRNA from nucleus to cytoplasm, prolongation of the IL-2Rα mRNA half life by p27rex is ascribed to stabilization of the mRNA. Experiments using deletion mutants and chimeric constructs of the IL-2Rα cDNA demonstrated that the coding sequence but not the 5′ or 3′ untranslated region of the IL-2Rα mRNA sequence is responsible for its protection by p27rex.

ジャーナルEMBO Journal
出版ステータスPublished - 1990

ASJC Scopus subject areas

  • 免疫学および微生物学一般
  • 生化学、遺伝学、分子生物学一般
  • 分子生物学
  • 神経科学一般


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