PROTAC RNF4 degrader-1 is a RNF4 PROTAC degrader (Kd = 64.5 nM) that degrades RNF4 via the ubiquitin-proteasome system. PROTAC RNF4 degrader-1 induces DNA damage, apoptosis, and exhibits antiproliferative activity in cancer cells. PROTAC RNF4 degrader-1 displays antitumor activity with no obvious side effects in mouse models. PROTAC RNF4 degrader-1 is applicable to the research of hepatocellular carcinoma[1].