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基本情報
登録情報 | データベース: EMDB / ID: EMD-5347 | |||||||||
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タイトル | 3D map of CETP-HDL complex at 14 Angstrom by optimized negative-staining EM and single-particle reconstruction | |||||||||
![]() | This is 3D reconstruction of HDL-CETP by negative-staining EM | |||||||||
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![]() | Cholesteryl ester transfer protein / lipoprotein / CETP / LDL / VLDL / HDL / electron microscopy / CETP mechanism | |||||||||
生物種 | ![]() | |||||||||
手法 | 単粒子再構成法 / ネガティブ染色法 / 解像度: 14.0 Å | |||||||||
![]() | Zhang L / Yan F / Zhang S / Lei D / Charles MA / Cavigiolio G / Oda M / Krauss RM / Weisgraber KH / Rye KA ...Zhang L / Yan F / Zhang S / Lei D / Charles MA / Cavigiolio G / Oda M / Krauss RM / Weisgraber KH / Rye KA / Pownall HJ / Qiu X / Ren G | |||||||||
![]() | ![]() タイトル: Structural basis of transfer between lipoproteins by cholesteryl ester transfer protein. 著者: Lei Zhang / Feng Yan / Shengli Zhang / Dongsheng Lei / M Arthur Charles / Giorgio Cavigiolio / Michael Oda / Ronald M Krauss / Karl H Weisgraber / Kerry-Anne Rye / Henry J Pownall / Xiayang Qiu / Gang Ren / ![]() 要旨: Human cholesteryl ester transfer protein (CETP) mediates the net transfer of cholesteryl ester mass from atheroprotective high-density lipoproteins to atherogenic low-density lipoproteins by an ...Human cholesteryl ester transfer protein (CETP) mediates the net transfer of cholesteryl ester mass from atheroprotective high-density lipoproteins to atherogenic low-density lipoproteins by an unknown mechanism. Delineating this mechanism would be an important step toward the rational design of new CETP inhibitors for treating cardiovascular diseases. Using EM, single-particle image processing and molecular dynamics simulation, we discovered that CETP bridges a ternary complex with its N-terminal β-barrel domain penetrating into high-density lipoproteins and its C-terminal domain interacting with low-density lipoprotein or very-low-density lipoprotein. In our mechanistic model, the CETP lipoprotein-interacting regions, which are highly mobile, form pores that connect to a hydrophobic central cavity, thereby forming a tunnel for transfer of neutral lipids from donor to acceptor lipoproteins. These new insights into CETP transfer provide a molecular basis for analyzing mechanisms for CETP inhibition. | |||||||||
履歴 |
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構造の表示
ムービー |
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構造ビューア | EMマップ: ![]() ![]() ![]() |
添付画像 |
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ダウンロードとリンク
-EMDBアーカイブ
マップデータ | ![]() | 298.3 KB | ![]() | |
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ヘッダ (付随情報) | ![]() ![]() | 12.4 KB 12.4 KB | 表示 表示 | ![]() |
画像 | ![]() | 23.9 KB | ||
アーカイブディレクトリ | ![]() ![]() | HTTPS FTP |
-関連構造データ
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リンク
EMDBのページ | ![]() ![]() |
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マップ
ファイル | ![]() | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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注釈 | This is 3D reconstruction of HDL-CETP by negative-staining EM | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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: 2.812 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
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試料の構成要素
-全体 : Recombinant human CETP (about 53 kDa before post-translational mo...
全体 | 名称: Recombinant human CETP (about 53 kDa before post-translational modifications) was expressed in the dihydrofolate reductase-deficient Chinese hamster ovary cell line DG44. The spherical HDL ...名称: Recombinant human CETP (about 53 kDa before post-translational modifications) was expressed in the dihydrofolate reductase-deficient Chinese hamster ovary cell line DG44. The spherical HDL were converted from discoidal reconstituted HDL (rHDL)by incubation with fatty acid-free bovine serum albumin, beta-mercaptoethanol, ultracentrifugally isolated LDL and purified lecithin-cholesterol acyltransferase (LCAT), and then isolated by sequential ultracentrifugation in the density range of 1.07-1.21 g/ml. |
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要素 |
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-超分子 #1000: Recombinant human CETP (about 53 kDa before post-translational mo...
超分子 | 名称: Recombinant human CETP (about 53 kDa before post-translational modifications) was expressed in the dihydrofolate reductase-deficient Chinese hamster ovary cell line DG44. The spherical HDL ...名称: Recombinant human CETP (about 53 kDa before post-translational modifications) was expressed in the dihydrofolate reductase-deficient Chinese hamster ovary cell line DG44. The spherical HDL were converted from discoidal reconstituted HDL (rHDL)by incubation with fatty acid-free bovine serum albumin, beta-mercaptoethanol, ultracentrifugally isolated LDL and purified lecithin-cholesterol acyltransferase (LCAT), and then isolated by sequential ultracentrifugation in the density range of 1.07-1.21 g/ml. タイプ: sample / ID: 1000 詳細: The CETP sample was thawed from storage at -70 degrees Celcius before being used, the HDL sample was freshly prepared. 集合状態: one CETP bound to one HDL / Number unique components: 2 |
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分子量 | 実験値: 74 KDa / 理論値: 53 KDa / 手法: Sedimentation |
-分子 #1: Cholesteryl ester transfer protein
分子 | 名称: Cholesteryl ester transfer protein / タイプ: protein_or_peptide / ID: 1 / Name.synonym: CETP 詳細: optimized negative stain method was used for the CETP.HDL complex reconstruction コピー数: 1 / 集合状態: monomer / 組換発現: Yes |
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由来(天然) | 生物種: ![]() |
分子量 | 実験値: 74 KDa / 理論値: 53 KDa |
組換発現 | 生物種: ![]() ![]() |
-実験情報
-構造解析
手法 | ネガティブ染色法 |
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![]() | 単粒子再構成法 |
試料の集合状態 | particle |
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試料調製
濃度 | 0.005 mg/mL |
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緩衝液 | pH: 7.4 / 詳細: DPBS buffer |
染色 | タイプ: NEGATIVE 詳細: CETP.HDL complex specimens were prepared for EM by the optimized NS protocol (reported in Zhang, L., J. Lipid Research, 2010, 51,5, 1228-36, and 2011, 52,1, 175-84.) |
グリッド | 詳細: thin-carbon-coated 300 mesh copper grid (Cu-300CN, Pacific Grid-Tech, USA) |
凍結 | 凍結剤: NONE / 装置: OTHER |
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電子顕微鏡法
顕微鏡 | FEI TECNAI 20 |
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温度 | 最低: 94 K / 最高: 99 K / 平均: 96 K |
詳細 | Lose dose mode |
撮影 | カテゴリ: CCD フィルム・検出器のモデル: GATAN ULTRASCAN 4000 (4k x 4k) 平均電子線量: 50 e/Å2 |
電子線 | 加速電圧: 200 kV / 電子線源: LAB6 |
電子光学系 | 照射モード: OTHER / 撮影モード: BRIGHT FIELD / Cs: 2.0 mm / 最大 デフォーカス(公称値): 0.7 µm / 最小 デフォーカス(公称値): 0.1 µm / 倍率(公称値): 80000 |
試料ステージ | 試料ホルダー: Gatan 626 / 試料ホルダーモデル: GATAN LIQUID NITROGEN |
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画像解析
詳細 | The particles were initially selected using an automatic selection program, boxer, then manually adjusted by deleted the obviously poor quality particles. |
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CTF補正 | 詳細: ctffind3 in the FREALIGN software package, and corrected by EMAN |
最終 再構成 | アルゴリズム: OTHER / 解像度のタイプ: BY AUTHOR / 解像度: 14.0 Å / 解像度の算出法: FSC 0.5 CUT-OFF / ソフトウェア - 名称: EMAN / 使用した粒子像数: 8879 |
最終 2次元分類 | クラス数: 317 |
-原子モデル構築 1
初期モデル | PDB ID: |
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ソフトウェア | 名称: ![]() |
詳細 | Protocol: Chimera Rigid Body Docking |
精密化 | 空間: REAL / プロトコル: RIGID BODY FIT / 当てはまり具合の基準: cross-correlation |