National Institutes of Health/National Cancer Institute (NIH/NCI)
R01 CA206573
米国
National Institutes of Health/National Institute of Neurological Disorders and Stroke (NIH/NINDS)
R01 NS083660
米国
National Institutes of Health/National Institute of Neurological Disorders and Stroke (NIH/NINDS)
R01 NS107253
米国
National Science Foundation (NSF, United States)
1818086
米国
引用
ジャーナル: Mol Cell / 年: 2021 タイトル: Structure of the Arabidopsis thaliana glutamate receptor-like channel GLR3.4. 著者: Marriah N Green / Shanti Pal Gangwar / Erwan Michard / Alexander A Simon / Maria Teresa Portes / Juan Barbosa-Caro / Michael M Wudick / Michael A Lizzio / Oleg Klykov / Maria V Yelshanskaya / ...著者: Marriah N Green / Shanti Pal Gangwar / Erwan Michard / Alexander A Simon / Maria Teresa Portes / Juan Barbosa-Caro / Michael M Wudick / Michael A Lizzio / Oleg Klykov / Maria V Yelshanskaya / José A Feijó / Alexander I Sobolevsky / 要旨: Glutamate receptor-like channels (GLRs) play vital roles in various physiological processes in plants, such as wound response, stomatal aperture control, seed germination, root development, innate ...Glutamate receptor-like channels (GLRs) play vital roles in various physiological processes in plants, such as wound response, stomatal aperture control, seed germination, root development, innate immune response, pollen tube growth, and morphogenesis. Despite the importance of GLRs, knowledge about their molecular organization is limited. Here we use X-ray crystallography and single-particle cryo-EM to solve structures of the Arabidopsis thaliana GLR3.4. Our structures reveal the tetrameric assembly of GLR3.4 subunits into a three-layer domain architecture, reminiscent of animal ionotropic glutamate receptors (iGluRs). However, the non-swapped arrangement between layers of GLR3.4 domains, binding of glutathione through S-glutathionylation of cysteine C205 inside the amino-terminal domain clamshell, unique symmetry, inter-domain interfaces, and ligand specificity distinguish GLR3.4 from representatives of the iGluR family and suggest distinct features of the GLR gating mechanism. Our work elaborates on the principles of GLR architecture and symmetry and provides a molecular template for deciphering GLR-dependent signaling mechanisms in plants.
解像度: 2.29→64.46 Å / Cor.coef. Fo:Fc: 0.944 / Cor.coef. Fo:Fc free: 0.928 / SU B: 7.435 / SU ML: 0.175 / 交差検証法: THROUGHOUT / σ(F): 0 / ESU R: 0.329 / ESU R Free: 0.227 / 立体化学のターゲット値: MAXIMUM LIKELIHOOD 詳細: HYDROGENS HAVE BEEN ADDED IN THE RIDING POSITIONS U VALUES: REFINED INDIVIDUALLY
Rfactor
反射数
%反射
Selection details
Rfree
0.2426
1962
5 %
RANDOM
Rwork
0.2095
-
-
-
obs
0.2112
37406
99.62 %
-
溶媒の処理
イオンプローブ半径: 0.8 Å / 減衰半径: 0.8 Å / VDWプローブ半径: 1.2 Å / 溶媒モデル: MASK