| Literature DB >> 24900510 |
Ken-Ichi Kusakabe1, Nobuyuki Ide1, Yataro Daigo2, Takeshi Itoh1, Kenichi Higashino1, Yousuke Okano1, Genta Tadano1, Yuki Tachibana1, Yuji Sato1, Makiko Inoue1, Tooru Wada1, Motofumi Iguchi1, Takayuki Kanazawa1, Yukichi Ishioka1, Keiji Dohi1, Sachie Tagashira1, Yasuto Kido1, Shingo Sakamoto1, Kazuya Yasuo1, Masahiro Maeda1, Takahiko Yamamoto1, Masayo Higaki1, Takeshi Endoh1, Kazuo Ueda1, Takeshi Shiota1, Hitoshi Murai1, Yusuke Nakamura3.
Abstract
Monopolar spindle 1 (Mps1) is an attractive cancer drug target due to the important role that it plays in centrosome duplication, the spindle assembly checkpoint, and the maintenance of chromosomal stability. A design based on JNK inhibitors with an aminopyridine scaffold and subsequent modifications identified diaminopyridine 9 with an IC50 of 37 nM. The X-ray structure of 9 revealed that the Cys604 carbonyl group of the hinge region flips to form a hydrogen bond with the aniline NH group in 9. Further optimization of 9 led to 12 with improved cellular activity, suitable pharmacokinetic profiles, and good in vivo efficacy in the mouse A549 xenograft model. Moreover, 12 displayed excellent selectivity over 95 kinases, indicating the contribution of its unusual flipped-peptide conformation to its selectivity.Entities:
Keywords: Mps 1; TTK; cancer; diaminopyridine; inhibitor; monopolar spindle 1; peptide flip
Year: 2012 PMID: 24900510 PMCID: PMC4025729 DOI: 10.1021/ml3000879
Source DB: PubMed Journal: ACS Med Chem Lett ISSN: 1948-5875 Impact factor: 4.345