Development of a novel anticancer drug targeting UBL-UBA family protein

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The purpose of this study is to develop an anticancer agent targeting UBL-UBA family protein. I found that GUT-70, an antiproliferative compound, binds to ubiquilin 1. GUT-70 accumulated intercellular ubiquitinated proteins, and proteome analysis showed that GUT-70 is classified into the same cluster as a proteasome inhibitor. These results suggest that GUT-70 targets ubiquilin 1, thereby suppressing ubiqutin-proteasome system, resulting in the growth inhibition of cancer cells.