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EMBO J. Nov 1985; 4(11): 2905–2909.
PMCID: PMC554596

The nucleotide sequence of the human int-1 mammary oncogene; evolutionary conservation of coding and non-coding sequences.

Abstract

The mouse mammary tumor virus can induce mammary tumors in mice by proviral activation of an evolutionarily conserved cellular oncogene called int-1. Here we present the nucleotide sequence of the human homologue of int-1, and compare it with the mouse gene. Like the mouse gene, the human homologue contains a reading frame of 370 amino acids, with only four substitutions. The amino acid changes are all in the hydrophobic leader domain of the int-1 encoded protein, and do not significantly alter its hydropathic index. The conservation between the mouse and the human int-1 genes is not restricted to exons; extensive parts of the introns are also homologous. Thus, int-1 ranks among the most conserved genes known, a property shared with other oncogenes.

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