Ordering of the N-Terminus of Human MDM2 by Small Molecule Inhibitors
详细信息 查看全文
- 作者：Klaus Michelsen ; John B. Jordan ; Jeffrey Lewis ; Alexander M. Long ; Evelyn Yang ; Yosup Rew ; Jing Zhou ; Peter Yakowec ; Paul D. Schnier ; Xin Huang ; Leszek Poppe
- 刊名：The Journal of the American Chemical Society
- 出版年：2012
- 出版时间：October 17, 2012
- 年：2012
- 卷：134
- 期：41
- 页码：17059-17067
- 全文大小：467K
- 年卷期：v.134,no.41(October 17, 2012)
- ISSN：1520-5126
文摘
Restoration of p53 function through the disruption of the MDM2-p53 protein complex is a promising strategy for the treatment of various types of cancer. Here, we present kinetic, thermodynamic, and structural rationale for the remarkable potency of a new class of MDM2 inhibitors, the piperidinones. While these compounds bind to the same site as previously reported for small molecule inhibitors, such as the Nutlins, data presented here demonstrate that the piperidinones also engage the N-terminal region (residues 10鈥?6) of human MDM2, in particular, Val14 and Thr16. This portion of MDM2 is unstructured in both the apo form of the protein and in MDM2 complexes with p53 or Nutlin, but adopts a novel 尾-strand structure when complexed with the piperidinones. The ordering of the N-terminus upon binding of the piperidinones extends the current model of MDM2-p53 interaction and provides a new route to rational design of superior inhibitors.