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
Chai J
中科院分区:
生物学1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

文献摘要

参考文献

相似文献

含有核苷酸结合域和富含亮氨酸重复序列 (LRR) 的蛋白质 (NLR) 作为细胞内免疫受体来检测病原体或宿主衍生信号的存在。 NLR 如何感知其配体的机制仍然难以捉摸。在这里,我们报告了通过冷冻电子显微镜以 4.28 Å 分辨率测定的与 NLR 蛋白 NAIP5 和 NLRC4 复合的细菌鞭毛蛋白衍生物的结构。该结构表明鞭毛蛋白衍生物形成两个平行螺旋,与多个结构域相互作用,包括NAIP5的BIR1和LRR。与 NAIP5 的结合导致鞭毛蛋白衍生物几乎完全埋藏,从而稳定了 NAIP5 的活性构象。鞭毛蛋白的 C 端末端锚定在 NAIP5 的空间约束结合袋上,这可能是 NAIP5 区分不同细菌鞭毛蛋白的结构决定因素,这一观点得到了生化数据的进一步支持。总而言之,我们的结果揭示了 NLR 配体感知的分子机制。
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.
DOI: 10.1038/nmeth.2727
发表时间: 2014-01
期刊: NATURE METHODS
影响因子: 48
作者:
Kucukelbir, Alp;Sigworth, Fred J.;Tagare, Hemant D.
通讯作者: Tagare, Hemant D.
DOI: 10.1146/annurev-immunol-031210-101405
发表时间: 2011
影响因子: 29.7
作者:
Davis BK;Wen H;Ting JP
通讯作者: Ting JP
电子计数和束诱导运动校正可实现近原子分辨率的单粒子冷冻电镜。
DOI: 10.1038/nmeth.2472
发表时间: 2013-06
期刊: NATURE METHODS
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
DOI: 10.1016/s1097-2765(02)00599-3
发表时间: 2002-08-01
期刊: MOLECULAR CELL
影响因子: 16
作者:
Martinon, F;Burns, K;Tschopp, J
通讯作者: Tschopp, J