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Disruption of FAT10?MAD2 binding inhibits tumor progression #MMPMID25422469
Theng SS; Wang W; Mah WC; Chan C; Zhuo J; Gao Y; Qin H; Lim L; Chong SS; Song J; Lee CG
Proc Natl Acad Sci U S A 2014[Dec]; 111 (49): E5282-91 PMID25422469show ga
FAT10, a ubiquitin-like modifier, is an oncogene that interacts with mitotic arrest-deficient 2 (MAD2) and confers cellular malignancy. Here we identified the MAD2-binding residues of FAT10 and determined the first solution structure, to our knowledge, of the first FAT10 ubiquitin-like domain. Importantly, we demonstrated the proof-of-mechanism for a novel and specific drug-targeting strategy that entails the specific inhibition of the pathological activity of a therapeutic target but not its reported physiological function, thus minimizing undesirable side effects: Abrogation of the FAT10?MAD2 interaction curtailed tumor progression without affecting FAT10?s interaction with its other known physiological binding partners. This study presents a paradigm for drug targeting and paves the way for the development of a novel small-molecule anticancer inhibitor targeting the MAD2-binding interface of FAT10.