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基本情報
登録情報 | データベース: PDB / ID: 7vsg | |||||||||
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タイトル | Cryo-EM structure of a human ATP11C-CDC50A flippase reconstituted in the Nanodisc in PtdSer-occluded E2-Pi state. | |||||||||
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![]() | TRANSPORT PROTEIN / flippase / P4-ATPase / membrane protein / phospholipid transporter | |||||||||
機能・相同性 | ![]() positive regulation of phospholipid translocation / aminophospholipid flippase activity / aminophospholipid transport / phosphatidylserine flippase activity / protein localization to endosome / phospholipid-translocating ATPase complex / ATPase-coupled intramembrane lipid transporter activity / positive regulation of protein exit from endoplasmic reticulum / phosphatidylserine floppase activity / phosphatidylethanolamine flippase activity ...positive regulation of phospholipid translocation / aminophospholipid flippase activity / aminophospholipid transport / phosphatidylserine flippase activity / protein localization to endosome / phospholipid-translocating ATPase complex / ATPase-coupled intramembrane lipid transporter activity / positive regulation of protein exit from endoplasmic reticulum / phosphatidylserine floppase activity / phosphatidylethanolamine flippase activity / xenobiotic transmembrane transport / P-type phospholipid transporter / azurophil granule membrane / phospholipid translocation / transport vesicle membrane / Ion transport by P-type ATPases / specific granule membrane / positive regulation of neuron projection development / recycling endosome / recycling endosome membrane / late endosome membrane / early endosome membrane / monoatomic ion transmembrane transport / apical plasma membrane / lysosomal membrane / endoplasmic reticulum membrane / Neutrophil degranulation / structural molecule activity / magnesium ion binding / endoplasmic reticulum / Golgi apparatus / ATP hydrolysis activity / ATP binding / membrane / plasma membrane 類似検索 - 分子機能 | |||||||||
生物種 | ![]() | |||||||||
手法 | 電子顕微鏡法 / 単粒子再構成法 / クライオ電子顕微鏡法 / 解像度: 3.9 Å | |||||||||
![]() | Nakanishii, H. / Abe, K. | |||||||||
資金援助 | ![]()
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![]() | ![]() タイトル: Cryo-EM of the ATP11C flippase reconstituted in Nanodiscs shows a distended phospholipid bilayer inner membrane around transmembrane helix 2. 著者: Hanayo Nakanishi / Kenichi Hayashida / Tomohiro Nishizawa / Atsunori Oshima / Kazuhiro Abe / ![]() 要旨: ATP11C is a member of the P4-ATPase flippase family that mediates translocation of phosphatidylserine (PtdSer) across the lipid bilayer. In order to characterize the structure and function of ATP11C ...ATP11C is a member of the P4-ATPase flippase family that mediates translocation of phosphatidylserine (PtdSer) across the lipid bilayer. In order to characterize the structure and function of ATP11C in a model natural lipid environment, we revisited and optimized a quick procedure for reconstituting ATP11C into Nanodiscs using methyl-β-cyclodextrin as a reagent for the detergent removal. ATP11C was efficiently reconstituted with the endogenous lipid, or the mixture of endogenous lipid and synthetic dioleoylphosphatidylcholine (DOPC)/dioleoylphosphatidylserine (DOPS), all of which retained the ATPase activity. We obtained 3.4 Å and 3.9 Å structures using single-particle cryo-electron microscopy (cryo-EM) of AlF- and BeF-stabilized ATP11C transport intermediates, respectively, in a bilayer containing DOPS. We show that the latter exhibited a distended inner membrane around ATP11C transmembrane helix 2, possibly reflecting the perturbation needed for phospholipid release to the lipid bilayer. Our structures of ATP11C in the lipid membrane indicate that the membrane boundary varies upon conformational changes of the enzyme and is no longer flat around the protein, a change that likely contributes to phospholipid translocation across the membrane leaflets. | |||||||||
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構造の表示
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構造ビューア | 分子: ![]() ![]() |
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PDBx/mmCIF形式 | ![]() | 230.3 KB | 表示 | ![]() |
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-検証レポート
文書・要旨 | ![]() | 1.3 MB | 表示 | ![]() |
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文書・詳細版 | ![]() | 1.3 MB | 表示 | |
XML形式データ | ![]() | 46.4 KB | 表示 | |
CIF形式データ | ![]() | 69.1 KB | 表示 | |
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-関連構造データ
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リンク
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集合体
登録構造単位 | ![]()
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要素
#1: タンパク質 | 分子量: 124468.617 Da / 分子数: 1 / 由来タイプ: 組換発現 / 由来: (組換発現) ![]() | ||||
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#2: タンパク質 | 分子量: 40727.527 Da / 分子数: 1 / 由来タイプ: 組換発現 / 由来: (組換発現) ![]() | ||||
#3: 多糖 | alpha-D-mannopyranose-(1-4)-2-acetamido-2-deoxy-beta-D-glucopyranose-(1-4)-2-acetamido-2-deoxy-beta- ...alpha-D-mannopyranose-(1-4)-2-acetamido-2-deoxy-beta-D-glucopyranose-(1-4)-2-acetamido-2-deoxy-beta-D-glucopyranose | ||||
#4: 化合物 | ChemComp-17F / | ||||
#5: 糖 | 研究の焦点であるリガンドがあるか | Y | Has protein modification | Y | |
-実験情報
-実験
実験 | 手法: 電子顕微鏡法 |
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EM実験 | 試料の集合状態: PARTICLE / 3次元再構成法: 単粒子再構成法 |
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試料調製
構成要素 | 名称: Cryo-EM structure of a human ATP11C-CDC50A flippase reconstituted in the Nanodisc in PtdSer-occluded E2-Pi state. タイプ: COMPLEX / Entity ID: #1-#2 / 由来: RECOMBINANT |
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分子量 | 実験値: NO |
由来(天然) | 生物種: ![]() |
由来(組換発現) | 生物種: Mammalia (両生類) |
緩衝液 | pH: 6.5 |
試料 | 濃度: 7.5 mg/ml / 包埋: NO / シャドウイング: NO / 染色: NO / 凍結: YES / 詳細: This sample was monodisperse. |
試料支持 | グリッドの材料: COPPER/RHODIUM / グリッドのサイズ: 300 divisions/in. / グリッドのタイプ: Quantifoil R1.2/1.3 |
急速凍結 | 装置: FEI VITROBOT MARK IV / 凍結剤: ETHANE / 湿度: 99 % / 凍結前の試料温度: 277 K |
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電子顕微鏡撮影
実験機器 | ![]() モデル: Titan Krios / 画像提供: FEI Company |
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顕微鏡 | モデル: FEI TITAN KRIOS |
電子銃 | 電子線源: ![]() |
電子レンズ | モード: BRIGHT FIELD |
撮影 | 電子線照射量: 64 e/Å2 / フィルム・検出器のモデル: GATAN K3 (6k x 4k) |
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解析
ソフトウェア | 名称: PHENIX / バージョン: 1.19.2_4158: / 分類: 精密化 | ||||||||||||||||||||||||
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CTF補正 | タイプ: PHASE FLIPPING AND AMPLITUDE CORRECTION | ||||||||||||||||||||||||
3次元再構成 | 解像度: 3.9 Å / 解像度の算出法: FSC 0.143 CUT-OFF / 粒子像の数: 143384 / 対称性のタイプ: POINT | ||||||||||||||||||||||||
精密化 | 交差検証法: NONE 立体化学のターゲット値: GeoStd + Monomer Library + CDL v1.2 | ||||||||||||||||||||||||
原子変位パラメータ | Biso mean: 54.59 Å2 | ||||||||||||||||||||||||
拘束条件 |
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