Association of the APC Gene Product with "beta"-Catenin

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Abstract

Mutations in the human APC gene are linked to familial adenomatous polyposis and to the progression of sporadic colorectal and gastric tumors.To gain insight into APC function, APC-associated proteins were identified by immunoprecipitation experiments. Antibodies to APC precipitated a 95-kilodalton protein that was purified and identified by sequencing as "beta"-catenin, a protein that binds to the cell adhesion molecule E-cadherin. An antibody specific to "beta"-catenin also recognized the 95-kilodalton protein in the immunoprecipitates. These results suggest that APC is involved in cell adhesion.

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