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Hoffmann, R. A wiki for the life sciences where authorship matters. Nature Genetics (2008)

Molecular cloning of a functional bovine interleukin 2 cDNA.

A cDNA clone of the bovine interleukin 2 (IL-2) gene has been isolated and demonstrated to be functional in the production of secreted bovine IL-2 protein when transfected into monkey cells. The bovine IL-2 clone is 791 base pairs in length and contains an open reading frame of 474 base pairs coding for a bovine IL-2 precursor polypeptide of 158 amino acids with an estimated molecular weight of 17,884. The putative hydrophobic leader or signal sequence of the precursor protein is 23 amino acid residues long, suggesting that, after removal by processing, the mature secreted bovine IL-2 protein contains 135 amino acids and has a molecular weight of 15,464. Comparisons of both the nucleotide sequence and the predicted amino acid sequence of bovine IL-2 with those of the human and mouse IL-2 show extensive regions of sequence conservation between the species, interspersed with other regions of less similarity. The 3' untranslated region of the bovine IL-2 gene shares as much, if not greater, sequence homology with the 3' untranslated regions of the human and mouse genes as do the transcribed coding regions of these genes, suggesting an involvement of this region in regulation. In particular, a tandemly repeated sequence, (TATT)n, found in the 3' untranslated tail of the bovine IL-2 clone is also found in the 3' untranslated region of the other known interleukin and interferon genes, as well as in similar regions of many other inducible genes of the lymphoid and immune response systems, suggesting a cell or tissue-specific regulatory function for these evolutionarily conserved sequences.[1]


  1. Molecular cloning of a functional bovine interleukin 2 cDNA. Reeves, R., Spies, A.G., Nissen, M.S., Buck, C.D., Weinberg, A.D., Barr, P.J., Magnuson, N.S., Magnuson, J.A. Proc. Natl. Acad. Sci. U.S.A. (1986) [Pubmed]
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