On the mechanism of action of SJ-172550 in inhibiting the interaction of MDM4 and p53.

On the mechanism of action of SJ-172550 in inhibiting the interaction of MDM4 and p53.
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DOI:
10.1371/journal.pone.0037518
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发表时间:
2012
期刊:
影响因子:
3.7
通讯作者:
Guy RK
Guy RK
中科院分区:
综合性期刊3区
文献类型:
--
作者:
Bista M;Smithson D;Pecak A;Salinas G;Pustelny K;Min J;Pirog A;Finch K;Zdzalik M;Waddell B;Wladyka B;Kedracka-Krok S;Dyer MA;Dubin G;Guy RK

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SJ-172550(1)以前是在MDMX和P53相互作用的抑制剂的生化高通量筛选中发现的,并被鉴定为一种可逆的抑制剂(J.Biol.化学。2010年;285:10786)。对1的生化作用模式的进一步研究表明,它通过一个复杂的机制发挥作用,其中该化合物与MDMX形成共价但可逆的络合物,并将MDMX锁定为不能结合P53的构象。该复合体的相对稳定性受到多种因素的影响,包括介质的还原潜力、聚集体的存在以及其他影响蛋白质构象稳定性的因素。这种复杂的作用机制阻碍了化合物1作为选择性MDMX抑制剂的进一步发展。
SJ-172550 (1) was previously discovered in a biochemical high throughput screen for inhibitors of the interaction of MDMX and p53 and characterized as a reversible inhibitor (J. Biol. Chem. 2010; 285∶10786). Further study of the biochemical mode of action of 1 has shown that it acts through a complicated mechanism in which the compound forms a covalent but reversible complex with MDMX and locks MDMX into a conformation that is unable to bind p53. The relative stability of this complex is influenced by many factors including the reducing potential of the media, the presence of aggregates, and other factors that influence the conformational stability of the protein. This complex mechanism of action hinders the further development of compound 1 as a selective MDMX inhibitor.
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