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Ring finger E3 ligases have roles in processes central to maintenance of genomic integrity and cellular homeostasis. Many ring finger E3 ligases are implicated in malignancy. Ring finger protein 43 (RNF43) is a ring finger E3 ligase that negatively regulates the Wnt/β-catenin signaling pathway. RNF43 is frequently mutated in several types of malignancy, including intrahepatic cholangiocarcinoma (ICC)...