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, 9 (12), 3689-94

Mutations in p53 Produce a Common Conformational Effect That Can Be Detected With a Panel of Monoclonal Antibodies Directed Toward the Central Part of the p53 Protein

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  • PMID: 7526318

Mutations in p53 Produce a Common Conformational Effect That Can Be Detected With a Panel of Monoclonal Antibodies Directed Toward the Central Part of the p53 Protein

Y Legros et al. Oncogene.

Abstract

Human p53 displays two immunodominant regions localized in the amino and carboxy termini of the protein. Using a truncated p53 (residues 66 to 361), we selected eight new monoclonal antibodies directed to the central part of the protein. We identified the epitopes recognized by seven out of eight antibodies with a set of overlapping peptides. One of these antibodies had an epitope similar to PAb240, whereas the others recognized novel and diverse antigenic determinants. Using a series of 19 p53 mutants, we show that the behavior of several of the new monoclonal antibodies is similar to that of PAb240 despite their various epitope localizations. This suggests that different mutations in the p53 protein induce an overall conformational change that can be detected by various monoclonal antibodies directed toward the central part of the protein.

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