Molecular cloning and structure of the human interleukin 2 receptor gene.
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Ishida N, Kanamori H, Noma T, Nikaido T, Sabe H, Suzuki N, Shimizu A, Honjo T
Molecular cloning and structure of the human interleukin 2 receptor gene.
Nucleic Acids Res. 1985 Nov 11;13(21):7579-89.
- PubMed ID
- 2999698 [ View in PubMed]
- Abstract
We have cloned the IL-2 receptor gene from human genomic DNA libraries using IL-2 receptor cDNA as probe. The genomic DNA segments that hybridized with cDNA were subcloned in M13 phages and their sequences were determined. The nucleotide sequences showed that the IL-2 receptor gene was encoded by eight exons and that the coding region sequences agreed completely with that of the IL-2 receptor cDNA cloned from a cell line derived from adult T cell leukemia (ATL), in which IL-2 receptors are expressed abnormally. The nucleotide sequence of the 5'-flanking region had a putative promotor region, which had some homology with the human IL-2 gene. Transcription initiation sites were clustered about 25 bp 3' to the TATA box as assessed by primer extension analysis. These sites for normal and ATL T cells were the same. Exons 2 and 4 encoding the extracytoplasmic portion had significant homology, suggesting that the two exons are derived by duplication of an ancestral exon. Exon 2 contained six cysteine residues, four of which are conserved at the corresponding positions in exon 4.