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Proline-rich acidic protein 1, pregnancy-specific uterine PRAP, or proline-rich acidic protein 1, is a family of eukaryotic proteins. PRAP is abundantly expressed in the epithelial cells of the human liver, kidney, gastrointestinal tract, and cervix. It is significantly down-regulated in hepatocellular carcinoma and right colon adenocarcinoma compared with the respective adjacent normal tissues. In the mouse it is expressed in the epithelial cells of the mouse and rat gastrointestinal tracts, and pregnant mouse uterus. This article describes the isolation, distribution, and functional characterization of the human homolog. PRAP was abundantly expressed in the epithelial cells of the human liver, kidney, gastrointestinal tract, and cervix. PRAP plays an important role in maintaining normal growth suppression. |
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