6WJH

Crystal structure of MAGE-A11 bound to the PCF11 degron

6WJH の概要

• エントリーDOI: 10.2210/pdb6wjh/pdb
• 分子名称: Fusion protein of PCF11 and MAGE-A11 (2 entities in total)
• 機能のキーワード: mage-a11, pcf 11, ubiquitin ligase, protein complex, ligase
• 由来する生物種: Homo sapiens (Human); 詳細
• タンパク質・核酸の鎖数: 4
• 化学式量合計: 111203.29

構造登録者

Miller, D.J.,Huang, X. (登録日: 2020-04-13, 公開日: 2020-10-14, 最終更新日: 2023-10-18)

主引用文献

Yang, S.W.,Huang, X.,Lin, W.,Min, J.,Miller, D.J.,Mayasundari, A.,Rodrigues, P.,Griffith, E.C.,Gee, C.T.,Li, L.,Li, W.,Lee, R.E.,Rankovic, Z.,Chen, T.,Potts, P.R.
Structural basis for substrate recognition and chemical inhibition of oncogenic MAGE ubiquitin ligases.
Nat Commun, 11:4931-4931, 2020

PubMed Abstract: Testis-restricted melanoma antigen (MAGE) proteins are frequently hijacked in cancer and play a critical role in tumorigenesis. MAGEs assemble with E3 ubiquitin ligases and function as substrate adaptors that direct the ubiquitination of novel targets, including key tumor suppressors. However, how MAGEs recognize their targets is unknown and has impeded the development of MAGE-directed therapeutics. Here, we report the structural basis for substrate recognition by MAGE ubiquitin ligases. Biochemical analysis of the degron motif recognized by MAGE-A11 and the crystal structure of MAGE-A11 bound to the PCF11 substrate uncovered a conserved substrate binding cleft (SBC) in MAGEs. Mutation of the SBC disrupted substrate recognition by MAGEs and blocked MAGE-A11 oncogenic activity. A chemical screen for inhibitors of MAGE-A11:substrate interaction identified 4-Aminoquinolines as potent inhibitors of MAGE-A11 that show selective cytotoxicity. These findings provide important insights into the large family of MAGE ubiquitin ligases and identify approaches for developing cancer-specific therapeutics.

PubMed: 33004795
DOI: 10.1038/s41467-020-18708-x

実験手法

X-RAY DIFFRACTION (2.19 Å)