+
データを開く
-
基本情報
登録情報 | データベース: EMDB / ID: EMD-22365 | ||||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|---|
タイトル | Structure of GABAA receptor inside synapse | ||||||||||||
![]() | GABAA receptor inside synapse | ||||||||||||
![]() |
| ||||||||||||
生物種 | ![]() ![]() | ||||||||||||
手法 | サブトモグラム平均法 / クライオ電子顕微鏡法 / 解像度: 19.0 Å | ||||||||||||
![]() | Liu YT / Tao CL / Zhang X / Xia W / Shi DQ / Qi L / Xu C / Sun R / Li XW / Lau PM ...Liu YT / Tao CL / Zhang X / Xia W / Shi DQ / Qi L / Xu C / Sun R / Li XW / Lau PM / Zhou ZH / Bi GQ | ||||||||||||
資金援助 | ![]() ![]()
| ||||||||||||
![]() | ![]() タイトル: Mesophasic organization of GABA receptors in hippocampal inhibitory synapses. 著者: Yun-Tao Liu / Chang-Lu Tao / Xiaokang Zhang / Wenjun Xia / Dong-Qing Shi / Lei Qi / Cheng Xu / Rong Sun / Xiao-Wei Li / Pak-Ming Lau / Z Hong Zhou / Guo-Qiang Bi / ![]() ![]() 要旨: Information processing in the brain depends on specialized organization of neurotransmitter receptors and scaffolding proteins within the postsynaptic density. However, how these molecules are ...Information processing in the brain depends on specialized organization of neurotransmitter receptors and scaffolding proteins within the postsynaptic density. However, how these molecules are organized in situ remains largely unknown. In this study, template-free classification of oversampled sub-tomograms was used to analyze cryo-electron tomograms of hippocampal synapses. We identified type-A GABA receptors (GABARs) in inhibitory synapses and determined their in situ structure at 19-Å resolution. These receptors are organized hierarchically: from GABAR super-complexes with a preferred inter-receptor distance of 11 nm but variable relative angles, through semi-ordered, two-dimensional receptor networks with reduced Voronoi entropy, to mesophasic assembly with a sharp phase boundary. These assemblies likely form via interactions among postsynaptic scaffolding proteins and receptors and align with putative presynaptic vesicle release sites. Such mesophasic self-organization might allow synapses to achieve a 'Goldilocks' state, striking a balance between stability and flexibility and enabling plasticity in information processing. | ||||||||||||
履歴 |
|
-
構造の表示
ムービー |
![]() |
---|---|
構造ビューア | EMマップ: ![]() ![]() ![]() |
添付画像 |
-
ダウンロードとリンク
-EMDBアーカイブ
マップデータ | ![]() | 926.4 KB | ![]() | |
---|---|---|---|---|
ヘッダ (付随情報) | ![]() ![]() | 16 KB 16 KB | 表示 表示 | ![]() |
FSC (解像度算出) | ![]() | 2.4 KB | 表示 | ![]() |
画像 | ![]() | 45.7 KB | ||
その他 | ![]() ![]() | 720.4 KB 720.5 KB | ||
アーカイブディレクトリ | ![]() ![]() | HTTPS FTP |
-関連構造データ
-
リンク
EMDBのページ | ![]() ![]() |
---|
-
マップ
ファイル | ![]() | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
注釈 | GABAA receptor inside synapse | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
投影像・断面図 | 画像のコントロール
画像は Spider により作成 | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
ボクセルのサイズ | X=Y=Z: 4.35 Å | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
密度 |
| ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
対称性 | 空間群: 1 | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
詳細 | EMDB XML:
CCP4マップ ヘッダ情報:
|
-添付データ
-ハーフマップ: GABAA receptor inside synapse
ファイル | emd_22365_half_map_1.map | ||||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|---|
注釈 | GABAA receptor inside synapse | ||||||||||||
投影像・断面図 |
| ||||||||||||
密度ヒストグラム |
-ハーフマップ: GABAA receptor inside synapse
ファイル | emd_22365_half_map_2.map | ||||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|---|
注釈 | GABAA receptor inside synapse | ||||||||||||
投影像・断面図 |
| ||||||||||||
密度ヒストグラム |
-
試料の構成要素
-全体 : gamma-aminobutyric acid receptor
全体 | 名称: gamma-aminobutyric acid receptor |
---|---|
要素 |
|
-超分子 #1: gamma-aminobutyric acid receptor
超分子 | 名称: gamma-aminobutyric acid receptor / タイプ: complex / ID: 1 / 親要素: 0 |
---|---|
由来(天然) | 生物種: ![]() ![]() |
分子量 | 理論値: 250 KDa |
-実験情報
-構造解析
手法 | クライオ電子顕微鏡法 |
---|---|
![]() | サブトモグラム平均法 |
試料の集合状態 | cell |
-
試料調製
緩衝液 | pH: 7.3 |
---|---|
グリッド | モデル: Quantifoil R2/2 / 材質: GOLD / 前処理 - タイプ: GLOW DISCHARGE |
凍結 | 凍結剤: ETHANE / チャンバー内湿度: 100 % / チャンバー内温度: 298 K / 装置: FEI VITROBOT MARK IV |
詳細 | This sample is cultured hippocampal neurons. |
-
電子顕微鏡法
顕微鏡 | FEI TITAN KRIOS |
---|---|
撮影 | フィルム・検出器のモデル: GATAN K2 SUMMIT (4k x 4k) 検出モード: SUPER-RESOLUTION / 平均電子線量: 2.5 e/Å2 詳細: Tilt series were collected first from 0 to -60 and then from +2 to +60 at 2 intervals using FEI Xplore 3D software, with the defocus value set at -12 to -18 um, and the total electron dosage ...詳細: Tilt series were collected first from 0 to -60 and then from +2 to +60 at 2 intervals using FEI Xplore 3D software, with the defocus value set at -12 to -18 um, and the total electron dosage of about 100 e-/A2. The final pixel size was 0.755 nm. For the analysis of GABAARs, cryoET data were collected using a Titan Krios (Thermo Fisher) equipped with a Volta phase plate (VPP), a post-column energy filter (Gatan image filter), and a K2 Summit direct electron detector (Gatan). The energy filter slit was set at 20 eV. The Titan Krios was operated at an acceleration voltage of 300 KV. When VPP was used, the defocus value was maintained at -1 um; otherwise, it was maintained at -4 um. The VPP was conditioned by pre-irradiation for 60 s to achieve an initial phase shift of about 0.3pi. Images were collected by the K2 camera in counting mode or super-resolution mode. When counting mode was used, the pixel size was 0.435 nm. For super-resolution mode image, the final pixel size was 0.265 nm. Tilt series were acquired using SerialEM49 with two tilt schemes: from +48 to -60 and from +50 to +66 at an interval of 2; from +48 to -60 and from +51 to +66 at an interval of 3. The total accumulated dose is ~150 e-/A2. For sub-tomogram analysis, 6 grids were used for data collection. Totally, 32 and 40 inhibitory synapses were imaged with and without VPP, respectively. |
電子線 | 加速電圧: 300 kV / 電子線源: ![]() |
電子光学系 | 照射モード: FLOOD BEAM / 撮影モード: BRIGHT FIELD / Cs: 2.7 mm |
試料ステージ | ホルダー冷却材: NITROGEN |
実験機器 | ![]() モデル: Titan Krios / 画像提供: FEI Company |