Targeting TRAF6 E3 ligase activity with a small-molecule inhibitor combats autoimmunity
作者:Jara K. Brenke、Grzegorz M. Popowicz、Kenji Schorpp、Ina Rothenaigner、Manfred Roesner、Isabel Meininger、Cédric Kalinski、Larissa Ringelstetter、Omar R'kyek、Gerrit Jürjens、Michelle Vincendeau、Oliver Plettenburg、Michael Sattler、Daniel Krappmann、Kamyar Hadian
DOI:10.1074/jbc.ra118.002649
日期:2018.8
TRAF6 activity and, consequently, NF-κB activation. However, to date, no small-molecule modulator is available to inhibit the TRAF6-Ubc13 interaction and thereby counteract NF-κB signaling and associated diseases. Here, using a high-throughput small-molecule screening approach, we discovered an inhibitor of the TRAF6-Ubc13 interaction that reduces TRAF6-Ubc13 activity both in vitro and in cells. We found
组成型NF-κB信号代表了慢性炎症和自身免疫性疾病的标志。E3连接酶TNF受体相关因子6(TRAF6)起到了将先天免疫力,促炎性细胞因子和抗原受体桥接到规范NF-κB途径的关键调节剂的作用。结构分析和点突变揭示了TRAF6与E2缀合酶泛素缀合酶E2 N(Ubc13或UBE2N)结合以产生Lys63连接的泛素链用于炎症和免疫信号传播的重要作用。已经证明破坏TRAF6-Ubc13结合的遗传突变会降低TRAF6的活性,从而降低NF-κB的活化。但是,迄今为止,尚无小分子调节剂可抑制TRAF6-Ubc13相互作用,从而抵消NF-κB信号传导和相关疾病。这里,使用高通量小分子筛选方法,我们发现了TRAF6-Ubc13相互作用的抑制剂,可在体外和细胞中降低TRAF6-Ubc13的活性。我们发现,该化合物C25-140还可在人和鼠原代细胞的各种免疫和炎性信号通路中抑制NF-κB的活化。重要的是,在临床前