Identification of a polypeptide secreted by human breast cancer cells (MCF-7) as the human estrogen-responsive gene (pS2) product.
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Mori K, Fujii R, Kida N, Ohta M, Hayashi K
Identification of a polypeptide secreted by human breast cancer cells (MCF-7) as the human estrogen-responsive gene (pS2) product.
Biochem Biophys Res Commun. 1988 Aug 30;155(1):366-72.
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- 3261981 [ View in PubMed]
- Abstract
Human epidermal growth factor-like immunoreactive factor (designated as EGF-LI) synthesized and secreted by human breast cancer cells, strain MCF-7, was isolated in pure form. Thirty-seven micrograms of EGF-LI was purified by anion-exchange, gel permeation, and reverse-phase high-performance liquid chromatography from 2 liters of serum-free medium conditioned by the cells. The sequence of the first 36 amino acids from the N-terminus was determined with a gas-phase protein sequencer. Computer-assisted screening revealed, quite unexpectedly, this sequence to be completely identical to that of the translational product encoded by pS2, the human estrogen-responsive gene, over the region extending from residue 25 to 60 (Jakowlew, S. B. et al. (1984) Nucleic Acids Res., 12, 2861-2878).