+データを開く
-基本情報
登録情報 | データベース: EMDB / ID: EMD-9846 | |||||||||||||||||||||||||||||||||||||||||||||
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タイトル | Cryo-EM structure of glutamate dehydrogenase from Thermococcus profundus | |||||||||||||||||||||||||||||||||||||||||||||
マップデータ | structure of glutamate dehydrogenase from Thermococcus profundus | |||||||||||||||||||||||||||||||||||||||||||||
試料 |
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機能・相同性 | 機能・相同性情報 glutamate dehydrogenase [NAD(P)+] / glutamate dehydrogenase (NADP+) activity / glutamate dehydrogenase (NAD+) activity / amino acid metabolic process 類似検索 - 分子機能 | |||||||||||||||||||||||||||||||||||||||||||||
生物種 | Thermococcus profundus (古細菌) | |||||||||||||||||||||||||||||||||||||||||||||
手法 | 単粒子再構成法 / クライオ電子顕微鏡法 / 解像度: 3.7 Å | |||||||||||||||||||||||||||||||||||||||||||||
データ登録者 | Oide M / Kato T / Oroguchi T / Nakasako M | |||||||||||||||||||||||||||||||||||||||||||||
資金援助 | 日本, 14件
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引用 | ジャーナル: FEBS J / 年: 2020 タイトル: Energy landscape of domain motion in glutamate dehydrogenase deduced from cryo-electron microscopy. 著者: Mao Oide / Takayuki Kato / Tomotaka Oroguchi / Masayoshi Nakasako / 要旨: Analysis of the conformational changes of protein is important to elucidate the mechanisms of protein motions correlating with their function. Here, we studied the spontaneous domain motion of ...Analysis of the conformational changes of protein is important to elucidate the mechanisms of protein motions correlating with their function. Here, we studied the spontaneous domain motion of unliganded glutamate dehydrogenase from Thermococcus profundus using cryo-electron microscopy and proposed a novel method to construct free-energy landscape of protein conformations. Each subunit of the homo-hexameric enzyme comprises nucleotide-binding domain (NAD domain) and hexamer-forming core domain. A large active-site cleft is situated between the two domains and varies from open to close according to the motion of a NAD domain. A three-dimensional map reconstructed from all cryo-electron microscopy images displayed disordered volumes of NAD domains, suggesting that NAD domains in the collected images adopted various conformations in domain motion. Focused classifications on NAD domain of subunits provided several maps of possible conformations in domain motion. To deduce what kinds of conformations appeared in EM images, we developed a novel analysis method that describe the EM maps as a linear combination of representative conformations appearing in a 200-ns molecular dynamics simulation as reference. The analysis enabled us to estimate the appearance frequencies of the representative conformations, which illustrated a free-energy landscape in domain motion. In the open/close domain motion, two free-energy basins hindered the direct transformation from open to closed state. Structure models constructed for representative EM maps in classifications demonstrated the correlation between the energy landscape and conformations in domain motion. Based on the results, the domain motion in glutamate dehydrogenase and the analysis method to visualize conformational changes and free-energy landscape were discussed. DATABASE: The EM maps of the four conformations were deposited to Electron Microscopy Data Bank (EMDB) as accession codes EMD-9845 (open), EMD-9846 (half-open1), EMD-9847 (half-open2), and EMD-9848 (closed), respectively. In addition, the structural models built for the four conformations were deposited to the Protein Data Bank (PDB) as accession codes 6JN9 (open), 6JNA (half-open1), 6JNC (half-open2), and 6JND (closed), respectively. | |||||||||||||||||||||||||||||||||||||||||||||
履歴 |
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-構造の表示
ムービー |
ムービービューア |
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構造ビューア | EMマップ: SurfViewMolmilJmol/JSmol |
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 | emd_9846.map.gz | 40.2 MB | EMDBマップデータ形式 | |
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ヘッダ (付随情報) | emd-9846-v30.xml emd-9846.xml | 11.2 KB 11.2 KB | 表示 表示 | EMDBヘッダ |
画像 | emd_9846.png | 80.4 KB | ||
アーカイブディレクトリ | http://ftp.pdbj.org/pub/emdb/structures/EMD-9846 ftp://ftp.pdbj.org/pub/emdb/structures/EMD-9846 | HTTPS FTP |
-検証レポート
文書・要旨 | emd_9846_validation.pdf.gz | 390.2 KB | 表示 | EMDB検証レポート |
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文書・詳細版 | emd_9846_full_validation.pdf.gz | 389.8 KB | 表示 | |
XML形式データ | emd_9846_validation.xml.gz | 5.8 KB | 表示 | |
アーカイブディレクトリ | https://ftp.pdbj.org/pub/emdb/validation_reports/EMD-9846 ftp://ftp.pdbj.org/pub/emdb/validation_reports/EMD-9846 | HTTPS FTP |
-関連構造データ
-リンク
EMDBのページ | EMDB (EBI/PDBe) / EMDataResource |
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-マップ
ファイル | ダウンロード / ファイル: emd_9846.map.gz / 形式: CCP4 / 大きさ: 42.9 MB / タイプ: IMAGE STORED AS FLOATING POINT NUMBER (4 BYTES) | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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注釈 | structure of glutamate dehydrogenase from Thermococcus profundus | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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: 0.87 Å | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
密度 |
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対称性 | 空間群: 1 | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
詳細 | EMDB XML:
CCP4マップ ヘッダ情報:
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-添付データ
-試料の構成要素
-全体 : Hexamer of glutamate dehydrogenase
全体 | 名称: Hexamer of glutamate dehydrogenase |
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要素 |
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-超分子 #1: Hexamer of glutamate dehydrogenase
超分子 | 名称: Hexamer of glutamate dehydrogenase / タイプ: complex / ID: 1 / 親要素: 0 |
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由来(天然) | 生物種: Thermococcus profundus (古細菌) |
組換発現 | 生物種: Escherichia coli (大腸菌) |
分子量 | 理論値: 280 KDa |
-実験情報
-構造解析
手法 | クライオ電子顕微鏡法 |
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解析 | 単粒子再構成法 |
試料の集合状態 | particle |
-試料調製
緩衝液 | pH: 7.5 |
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凍結 | 凍結剤: ETHANE |
-電子顕微鏡法
顕微鏡 | JEOL CRYO ARM 200 |
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撮影 | フィルム・検出器のモデル: GATAN K2 BASE (4k x 4k) 平均電子線量: 10.0 e/Å2 |
電子線 | 加速電圧: 200 kV / 電子線源: FIELD EMISSION GUN |
電子光学系 | 照射モード: OTHER / 撮影モード: BRIGHT FIELD |
-画像解析
最終 再構成 | 解像度のタイプ: BY AUTHOR / 解像度: 3.7 Å / 解像度の算出法: FSC 0.143 CUT-OFF / 使用した粒子像数: 109568 |
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初期 角度割当 | タイプ: NOT APPLICABLE |
最終 角度割当 | タイプ: MAXIMUM LIKELIHOOD |