Structural insight into Wnt signaling inhibition by Clostridium difficile toxin B.
Structural insight into Wnt signaling inhibition by Clostridium difficile toxin B.
复制标题
艰难梭菌毒素B对Wnt信号传导抑制的结构洞察力B。
DOI:
10.1111/febs.14681
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发表时间:
2019-03
期刊:
影响因子:
--
通讯作者:
Jin R
中科院分区:
文献类型:
--
作者:
Chen P;Tao L;Liu Z;Dong M;Jin R
The incidence of Clostridium difficile infection (CDI) has increased significantly worldwide, causing substantial morbidity and mortality. One of the major virulence factor, TcdB, manages to enter the colonic epithelia via the human frizzled proteins (FZDs), which are physiological receptors for Wnt morphogens. Binding of TcdB to FZDs inhibits Wnt signaling, which may contribute to pathogenesis of CDI. Here, we review the structural mechanism by which TcdB exploits to recognize FZDs for cell entry and inhibiting Wnt signaling, which reveals new strategies to modulate Wnt signaling for therapeutic interventions. Overall structure of the TcdBFBD-CRD2 complex. TcdB uses an endogenous palmitoleic acid (PAM), which occupies the binding site for Wnt-adducted PAM on FZDs, as a co-receptor to recognize FZD. TcdB binding locks this lipid in place, thereby preventing Wnt from engaging FZDs and signaling.
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