+データを開く
-基本情報
登録情報 | データベース: PDB / ID: 8edw | ||||||
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タイトル | Cryo-EM Structure of human ABCA7 in BPL/Ch Nanodiscs | ||||||
要素 | Phospholipid-transporting ATPase ABCA7 | ||||||
キーワード | TRANSPORT PROTEIN / ABC transporter / Lipid Transporter / ABC exporter | ||||||
機能・相同性 | 機能・相同性情報 plasma membrane raft organization / apolipoprotein A-I receptor activity / positive regulation of engulfment of apoptotic cell / negative regulation of amyloid precursor protein biosynthetic process / phospholipid transporter activity / ABC transporters in lipid homeostasis / floppase activity / phosphatidylserine floppase activity / amyloid-beta clearance by cellular catabolic process / positive regulation of phospholipid efflux ...plasma membrane raft organization / apolipoprotein A-I receptor activity / positive regulation of engulfment of apoptotic cell / negative regulation of amyloid precursor protein biosynthetic process / phospholipid transporter activity / ABC transporters in lipid homeostasis / floppase activity / phosphatidylserine floppase activity / amyloid-beta clearance by cellular catabolic process / positive regulation of phospholipid efflux / peptide cross-linking / phosphatidylcholine floppase activity / phospholipid efflux / negative regulation of endocytosis / high-density lipoprotein particle assembly / positive regulation of amyloid-beta clearance / P-type phospholipid transporter / positive regulation of protein localization to cell surface / apolipoprotein A-I-mediated signaling pathway / regulation of amyloid precursor protein catabolic process / phospholipid translocation / cholesterol efflux / negative regulation of PERK-mediated unfolded protein response / negative regulation of amyloid-beta formation / amyloid-beta formation / glial cell projection / phagocytic cup / regulation of lipid metabolic process / ATPase-coupled transmembrane transporter activity / protein localization to nucleus / positive regulation of cholesterol efflux / ABC-type transporter activity / negative regulation of MAPK cascade / phagocytosis / positive regulation of phagocytosis / visual learning / memory / ruffle membrane / cell junction / early endosome membrane / positive regulation of ERK1 and ERK2 cascade / Golgi membrane / intracellular membrane-bounded organelle / Golgi apparatus / cell surface / endoplasmic reticulum / ATP hydrolysis activity / ATP binding / plasma membrane 類似検索 - 分子機能 | ||||||
生物種 | Homo sapiens (ヒト) | ||||||
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: 3.6 Å | ||||||
データ登録者 | Alam, A. / Le, L.T.M. / Thompson, J.R. | ||||||
資金援助 | 米国, 1件
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引用 | ジャーナル: EMBO J / 年: 2023 タイトル: Cryo-EM structures of human ABCA7 provide insights into its phospholipid translocation mechanisms. 著者: Le Thi My Le / James Robert Thompson / Sepehr Dehghani-Ghahnaviyeh / Shashank Pant / Phuoc Xuan Dang / Jarrod Bradley French / Takahisa Kanikeyo / Emad Tajkhorshid / Amer Alam / 要旨: Phospholipid extrusion by ABC subfamily A (ABCA) exporters is central to cellular physiology, although the specifics of the underlying substrate interactions and transport mechanisms remain poorly ...Phospholipid extrusion by ABC subfamily A (ABCA) exporters is central to cellular physiology, although the specifics of the underlying substrate interactions and transport mechanisms remain poorly resolved at the molecular level. Here we report cryo-EM structures of lipid-embedded human ABCA7 in an open state and in a nucleotide-bound, closed state at resolutions between 3.6 and 4.0 Å. The former reveals an ordered patch of bilayer lipids traversing the transmembrane domain (TMD), while the latter reveals a lipid-free, closed TMD with a small extracellular opening. These structures offer a structural framework for both substrate entry and exit from the ABCA7 TMD and highlight conserved rigid-body motions that underlie the associated conformational transitions. Combined with functional analysis and molecular dynamics (MD) simulations, our data also shed light on lipid partitioning into the ABCA7 TMD and localized membrane perturbations that underlie ABCA7 function and have broader implications for other ABCA family transporters. | ||||||
履歴 |
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-構造の表示
構造ビューア | 分子: MolmilJmol/JSmol |
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-ダウンロードとリンク
-ダウンロード
PDBx/mmCIF形式 | 8edw.cif.gz | 335.6 KB | 表示 | PDBx/mmCIF形式 |
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PDB形式 | pdb8edw.ent.gz | 263.2 KB | 表示 | PDB形式 |
PDBx/mmJSON形式 | 8edw.json.gz | ツリー表示 | PDBx/mmJSON形式 | |
その他 | その他のダウンロード |
-検証レポート
文書・要旨 | 8edw_validation.pdf.gz | 1.5 MB | 表示 | wwPDB検証レポート |
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文書・詳細版 | 8edw_full_validation.pdf.gz | 1.5 MB | 表示 | |
XML形式データ | 8edw_validation.xml.gz | 60.7 KB | 表示 | |
CIF形式データ | 8edw_validation.cif.gz | 89.1 KB | 表示 | |
アーカイブディレクトリ | https://data.pdbj.org/pub/pdb/validation_reports/ed/8edw ftp://data.pdbj.org/pub/pdb/validation_reports/ed/8edw | HTTPS FTP |
-関連構造データ
-リンク
-集合体
登録構造単位 |
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-要素
#1: タンパク質 | 分子量: 234598.578 Da / 分子数: 1 / 由来タイプ: 組換発現 / 由来: (組換発現) Homo sapiens (ヒト) / 遺伝子: ABCA7 / 発現宿主: Homo sapiens (ヒト) / 参照: UniProt: Q8IZY2, P-type phospholipid transporter | ||||||||||
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#2: 多糖 | #3: 糖 | ChemComp-NAG / #4: 化合物 | ChemComp-UNL / 分子量: 622.834 Da / 分子数: 18 / 由来タイプ: 合成 / タイプ: SUBJECT OF INVESTIGATION #5: 化合物 | 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 |
-試料調製
構成要素 | 名称: Human ABCA7 in Porcine BPL/Ch/MSP1D1 nanodiscs / タイプ: COMPLEX 詳細: Human ABCA7 recombinantly expressed in HEK293 TREX cell line and reconstituted in MSP1D1 nanodiscs comprising 4:1 mixture of Porcine Brain Polar Lipids:Cholesterol Entity ID: #1 / 由来: RECOMBINANT |
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分子量 | 値: 0.234350 MDa / 実験値: YES |
由来(天然) | 生物種: Homo sapiens (ヒト) |
由来(組換発現) | 生物種: Homo sapiens (ヒト) |
緩衝液 | pH: 7.5 詳細: 25mM HEPES pH 7.5, 150mM NaCl, 5mM ATP gammaS, 10mM Magnesium Chloride |
試料 | 濃度: 0.5 mg/ml / 包埋: NO / シャドウイング: NO / 染色: NO / 凍結: YES |
試料支持 | 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: 90 % / 凍結前の試料温度: 277 K |
-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: FIELD EMISSION GUN / 加速電圧: 300 kV / 照射モード: FLOOD BEAM |
電子レンズ | モード: BRIGHT FIELD / 最大 デフォーカス(公称値): 2400 nm / 最小 デフォーカス(公称値): 800 nm |
撮影 | 平均露光時間: 60 sec. / 電子線照射量: 60 e/Å2 / 検出モード: COUNTING フィルム・検出器のモデル: FEI FALCON III (4k x 4k) |
-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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EMソフトウェア |
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CTF補正 | タイプ: PHASE FLIPPING AND AMPLITUDE CORRECTION | ||||||||||||||||||||||||||||||||||||
対称性 | 点対称性: C1 (非対称) | ||||||||||||||||||||||||||||||||||||
3次元再構成 | 解像度: 3.6 Å / 解像度の算出法: FSC 0.143 CUT-OFF / 粒子像の数: 91381 / 対称性のタイプ: POINT | ||||||||||||||||||||||||||||||||||||
原子モデル構築 | プロトコル: AB INITIO MODEL / 空間: REAL | ||||||||||||||||||||||||||||||||||||
原子モデル構築 | PDB-ID: 6JBJ Accession code: 6JBJ / Source name: PDB / タイプ: experimental model | ||||||||||||||||||||||||||||||||||||
拘束条件 |
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