One Atom Makes All the Difference: Getting a Foot in the Door between SOS1 and KRAS
作者:Juergen Ramharter、Dirk Kessler、Peter Ettmayer、Marco H. Hofmann、Thomas Gerstberger、Michael Gmachl、Tobias Wunberg、Christiane Kofink、Michael Sanderson、Heribert Arnhof、Gerd Bader、Klaus Rumpel、Andreas Zöphel、Renate Schnitzer、Jark Böttcher、Jonathan C. O’Connell、Rachel L. Mendes、David Richard、Nikolai Pototschnig、Irene Weiner、Wolfgang Hela、Katja Hauer、Daniela Haering、Lyne Lamarre、Bernhard Wolkerstorfer、Christian Salamon、Patrick Werni、Silvia Munico-Martinez、Reiner Meyer、Matthew D. Kennedy、Norbert Kraut、Darryl B. McConnell
DOI:10.1021/acs.jmedchem.0c01949
日期:2021.5.27
primarily through protein–protein interactions (PPIs). The interaction between KRAS and SOS1, crucial for the activation of KRAS, is a typical, challenging PPI with a large contact surface area and high affinity. Here, we report that the addition of only one atom placed between Y884SOS1 and A73KRAS is sufficient to convert SOS1 activators into SOS1 inhibitors. We also disclose the discovery of BI-3406. Combination
KRAS是人类癌症中最常见的致癌驱动程序,受到控制并主要通过蛋白质-蛋白质相互作用(PPI)发出信号。对于激活KRAS至关重要的KRAS和SOS1之间的相互作用是典型的,具有挑战性的PPI,具有较大的接触表面积和高亲和力。在这里,我们报告说,仅在Y884 SOS1和A73 KRAS之间放置一个原子就足以将SOS1活化剂转化为SOS1抑制剂。我们还披露了BI-3406的发现。与上游EGFR抑制剂afatinib的组合显示出针对KRAS G13D突变型结直肠肿瘤细胞的体内功效,证明了BI-3406的实用性探究SOS1生物学。这些发现挑战了教条,即需要大分子来破坏具有挑战性的PPI。取而代之的是“脚踏实地”的方法,即在关键PPI相互作用之间放置单个原子或小的官能团,即使对于具有挑战性的PPI(例如SOS1-KRAS),也可以产生有效的抑制剂。