A highly immunogenic region of a human polymorphic epithelial mucin expressed by carcinomas is made up of tandem repeats

S. Gendler, J. Taylor-Papadimitriou, T. Duhig, J. Rothbard, J. Burchel

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479 Scopus citations

Abstract

The nucleotide sequences of partial cDNA clones coding for the core protein of a human polymorphic epithelial mucin were determined, and a large domain was found to consist of a 60-base pair tandem repeat sequence. The cDNA clones were originally selected (Gendler, S.J., Burchell, J.M., Duhig, T., Lamport, D., White, R., Parker, M., and Tailor-Papadimitriou, J. (1987) Proc. Natl. Acad. Sci. U.S.A. 84, 6060-6064) using three monoclonal antibodies which show differential reactivity with the mucin produced by normal and malignant breast. Two of the epitopes are exposed in the normally processed and cancer-associated mucin, while one epitope is unmasked only in the cancer-associated mucin (Burchell, J.M., Durbin, H., and Taylor-Papadimitriou, J. (1983) J. Immunol. 131, 508-513; Burchell, J., Gendler, S., Taylor-Papadimitriou, J., Girling, A., Lewis, A., Millis, R., and Lamport, D. (1987) Cancer Res. 47, 5476-5482). We show here that all three antibodies react with a synthetic peptide with an amino acid sequence corresponding to that predicted by the tandem repeat. Identification of the epitopes preferentially expressed on the cancer-associated mucin should allow a directed approach to the development of tumor-specific antibodies using synthetic peptides as immunogens.

Original languageEnglish (US)
Pages (from-to)12820-12823
Number of pages4
JournalJournal of Biological Chemistry
Volume263
Issue number26
StatePublished - 1988

ASJC Scopus subject areas

  • Biochemistry
  • Molecular Biology
  • Cell Biology

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