National Institutes of Health/National Institute of General Medical Sciences (NIH/NIGMS)
R01 GM100400
米国
引用
ジャーナル: Nature / 年: 2021 タイトル: Architecture and assembly mechanism of native glycine receptors. 著者: Hongtao Zhu / Eric Gouaux / 要旨: Glycine receptors (GlyRs) are pentameric, 'Cys-loop' receptors that form chloride-permeable channels and mediate fast inhibitory signalling throughout the central nervous system. In the spinal cord ...Glycine receptors (GlyRs) are pentameric, 'Cys-loop' receptors that form chloride-permeable channels and mediate fast inhibitory signalling throughout the central nervous system. In the spinal cord and brainstem, GlyRs regulate locomotion and cause movement disorders when mutated. However, the stoichiometry of native GlyRs and the mechanism by which they are assembled remain unclear, despite extensive investigation. Here we report cryo-electron microscopy structures of native GlyRs from pig spinal cord and brainstem, revealing structural insights into heteromeric receptors and their predominant subunit stoichiometry of 4α:1β. Within the heteromeric pentamer, the β(+)-α(-) interface adopts a structure that is distinct from the α(+)-α(-) and α(+)-β(-) interfaces. Furthermore, the β-subunit contains a unique phenylalanine residue that resides within the pore and disrupts the canonical picrotoxin site. These results explain why inclusion of the β-subunit breaks receptor symmetry and alters ion channel pharmacology. We also find incomplete receptor complexes and, by elucidating their structures, reveal the architectures of partially assembled α-trimers and α-tetramers.
名称: 3D1 fab / タイプ: complex / ID: 3 / 親要素: 1 / 含まれる分子: #1-#2 詳細: The Fab fragments were cleaved from the monoclonal antibody that was expressed in the hybridoma
由来(天然)
生物種: Rattus norvegicus (ドブネズミ)
-
分子 #1: 3D1 Fab Light Chain
分子
名称: 3D1 Fab Light Chain / タイプ: protein_or_peptide / ID: 1 詳細: The protein was cleaved from the mAb that was expressed in the hybridoma コピー数: 5 / 光学異性体: LEVO
名称: 3D1 Fab Heavy Chain / タイプ: protein_or_peptide / ID: 2 詳細: The protein was cleaved from the mAb that was expressed in the hybridoma コピー数: 5 / 光学異性体: LEVO