Structural basis for specific flagellin recognition by the NLR protein NAIP5.
Structural basis for specific flagellin recognition by the NLR protein NAIP5.
复制标题
NLR 蛋白 NAIP5 特异性鞭毛蛋白识别的结构基础
DOI:
10.1038/cr.2017.148
复制
发表时间:
2018-01
期刊:
影响因子:
44.1
通讯作者:
Chai J
中科院分区:
文献类型:
--
作者:
Yang X;Yang F;Wang W;Lin G;Hu Z;Han Z;Qi Y;Zhang L;Wang J;Sui SF;Chai J
The nucleotide-binding domain- and leucine-rich repeat (LRR)-containing proteins (NLRs) function as intracellular immune receptors to detect the presence of pathogen- or host-derived signals. The mechanisms of how NLRs sense their ligands remain elusive. Here we report the structure of a bacterial flagellin derivative in complex with the NLR proteins NAIP5 and NLRC4 determined by cryo-electron microscopy at 4.28 Å resolution. The structure revealed that the flagellin derivative forms two parallel helices interacting with multiple domains including BIR1 and LRR of NAIP5. Binding to NAIP5 results in a nearly complete burial of the flagellin derivative, thus stabilizing the active conformation of NAIP5. The extreme C-terminal side of the flagellin is anchored to a sterically constrained binding pocket of NAIP5, which likely acts as a structural determinant for discrimination of different bacterial flagellins by NAIP5, a notion further supported by biochemical data. Taken together, our results shed light on the molecular mechanisms underlying NLR ligand perception.
登录
查看更多内容
影响因子:
48
作者:
Kucukelbir, Alp;Sigworth, Fred J.;Tagare, Hemant D.
通讯作者:
Tagare, Hemant D.
影响因子:
29.7
作者:
Davis BK;Wen H;Ting JP
通讯作者:
Ting JP
影响因子:
48
作者:
Li, Xueming;Mooney, Paul;Zheng, Shawn;Booth, Christopher R.;Braunfeld, Michael B.;Gubbens, Sander;Agard, David A.;Cheng, Yifan
通讯作者:
Cheng, Yifan
DOI:
10.1073/pnas.0913087107
发表时间:
2010-02-16
影响因子:
11.1
作者:
Miao, Edward A.;Mao, Dat P.;Aderem, Alan
通讯作者:
Aderem, Alan
影响因子:
16
作者:
Martinon, F;Burns, K;Tschopp, J
通讯作者:
Tschopp, J