+データを開く
-基本情報
登録情報 | データベース: PDB / ID: 7zk5 | |||||||||
---|---|---|---|---|---|---|---|---|---|---|
タイトル | ABCB1 L335C mutant (mABCB1) in the outward facing state bound to AAC | |||||||||
要素 | ATP-dependent translocase ABCB1 | |||||||||
キーワード | MEMBRANE PROTEIN / ABC transporter | |||||||||
機能・相同性 | 機能・相同性情報 hormone transport / cellular response to borneol / response to codeine / response to cyclosporin A / Atorvastatin ADME / cellular response to mycotoxin / daunorubicin transport / positive regulation of response to drug / response to quercetin / cellular response to external biotic stimulus ...hormone transport / cellular response to borneol / response to codeine / response to cyclosporin A / Atorvastatin ADME / cellular response to mycotoxin / daunorubicin transport / positive regulation of response to drug / response to quercetin / cellular response to external biotic stimulus / regulation of intestinal absorption / negative regulation of sensory perception of pain / response to antineoplastic agent / positive regulation of establishment of Sertoli cell barrier / Prednisone ADME / response to alcohol / terpenoid transport / ceramide floppase activity / response to glycoside / floppase activity / ceramide translocation / establishment of blood-retinal barrier / protein localization to bicellular tight junction / cellular response to L-glutamate / ABC-family proteins mediated transport / response to thyroxine / establishment of blood-brain barrier / phosphatidylethanolamine flippase activity / xenobiotic transport across blood-brain barrier / phosphatidylcholine floppase activity / xenobiotic detoxification by transmembrane export across the plasma membrane / intercellular canaliculus / export across plasma membrane / ABC-type xenobiotic transporter / response to vitamin D / P-type phospholipid transporter / ABC-type xenobiotic transporter activity / response to vitamin A / response to glucagon / intestinal absorption / phospholipid translocation / cellular response to antibiotic / cellular hyperosmotic salinity response / maintenance of blood-brain barrier / cellular response to alkaloid / efflux transmembrane transporter activity / xenobiotic transmembrane transporter activity / transmembrane transporter activity / ATPase-coupled transmembrane transporter activity / cellular response to dexamethasone stimulus / response to cadmium ion / cellular response to estradiol stimulus / lactation / placenta development / response to progesterone / female pregnancy / brush border membrane / circadian rhythm / cellular response to tumor necrosis factor / cellular response to lipopolysaccharide / response to hypoxia / apical plasma membrane / response to xenobiotic stimulus / ATP hydrolysis activity / ATP binding / plasma membrane / cytoplasm 類似検索 - 分子機能 | |||||||||
生物種 | Mus musculus (ハツカネズミ) | |||||||||
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: 2.6 Å | |||||||||
データ登録者 | Parey, K. / Januliene, D. / Gewering, T. / Moeller, A. | |||||||||
資金援助 | ドイツ, 2件
| |||||||||
引用 | ジャーナル: Elife / 年: 2024 タイトル: Tracing the substrate translocation mechanism in P-glycoprotein. 著者: Theresa Gewering / Deepali Waghray / Kristian Parey / Hendrik Jung / Nghi N B Tran / Joel Zapata / Pengyi Zhao / Hao Chen / Dovile Januliene / Gerhard Hummer / Ina Urbatsch / Arne Moeller / Qinghai Zhang / 要旨: P-glycoprotein (Pgp) is a prototypical ATP-binding cassette (ABC) transporter of great biological and clinical significance.Pgp confers cancer multidrug resistance and mediates the bioavailability ...P-glycoprotein (Pgp) is a prototypical ATP-binding cassette (ABC) transporter of great biological and clinical significance.Pgp confers cancer multidrug resistance and mediates the bioavailability and pharmacokinetics of many drugs (Juliano and Ling, 1976; Ueda et al., 1986; Sharom, 2011). Decades of structural and biochemical studies have provided insights into how Pgp binds diverse compounds (Loo and Clarke, 2000; Loo et al., 2009; Aller et al., 2009; Alam et al., 2019; Nosol et al., 2020; Chufan et al., 2015), but how they are translocated through the membrane has remained elusive. Here, we covalently attached a cyclic substrate to discrete sites of Pgp and determined multiple complex structures in inward- and outward-facing states by cryoEM. In conjunction with molecular dynamics simulations, our structures trace the substrate passage across the membrane and identify conformational changes in transmembrane helix 1 (TM1) as regulators of substrate transport. In mid-transport conformations, TM1 breaks at glycine 72. Mutation of this residue significantly impairs drug transport of Pgp in vivo, corroborating the importance of its regulatory role. Importantly, our data suggest that the cyclic substrate can exit Pgp without the requirement of a wide-open outward-facing conformation, diverting from the common efflux model for Pgp and other ABC exporters. The substrate transport mechanism of Pgp revealed here pinpoints critical targets for future drug discovery studies of this medically relevant system. | |||||||||
履歴 |
|
-構造の表示
構造ビューア | 分子: MolmilJmol/JSmol |
---|
-ダウンロードとリンク
-ダウンロード
PDBx/mmCIF形式 | 7zk5.cif.gz | 225.4 KB | 表示 | PDBx/mmCIF形式 |
---|---|---|---|---|
PDB形式 | pdb7zk5.ent.gz | 174.9 KB | 表示 | PDB形式 |
PDBx/mmJSON形式 | 7zk5.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 | 7zk5_validation.pdf.gz | 1.6 MB | 表示 | wwPDB検証レポート |
---|---|---|---|---|
文書・詳細版 | 7zk5_full_validation.pdf.gz | 1.6 MB | 表示 | |
XML形式データ | 7zk5_validation.xml.gz | 48.5 KB | 表示 | |
CIF形式データ | 7zk5_validation.cif.gz | 72.1 KB | 表示 | |
アーカイブディレクトリ | https://data.pdbj.org/pub/pdb/validation_reports/zk/7zk5 ftp://data.pdbj.org/pub/pdb/validation_reports/zk/7zk5 | HTTPS FTP |
-関連構造データ
関連構造データ | 14755MC 7zk4C 7zk6C 7zk8C 7zk9C 7zkaC 7zkbC 8avyC 8peeC M: このデータのモデリングに利用したマップデータ C: 同じ文献を引用 (文献) |
---|---|
類似構造データ | 類似検索 - 機能・相同性F&H 検索 |
-リンク
-集合体
登録構造単位 |
|
---|---|
1 |
|
-要素
-タンパク質 , 1種, 1分子 A
#1: タンパク質 | 分子量: 146063.859 Da / 分子数: 1 / 由来タイプ: 組換発現 / 由来: (組換発現) Mus musculus (ハツカネズミ) / 遺伝子: Abcb1a, Abcb4, Mdr1a, Mdr3, Pgy-3, Pgy3 / 発現宿主: Komagataella pastoris (菌類) 参照: UniProt: P21447, ABC-type xenobiotic transporter, P-type phospholipid transporter |
---|
-非ポリマー , 5種, 43分子
#2: 化合物 | #3: 化合物 | #4: 化合物 | ChemComp-Y01 / #5: 化合物 | ChemComp-JIZ / ( | #6: 水 | ChemComp-HOH / | |
---|
-詳細
研究の焦点であるリガンドがあるか | Y |
---|
-実験情報
-実験
実験 | 手法: 電子顕微鏡法 |
---|---|
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: ABCB1 / タイプ: COMPLEX / Entity ID: #1 / 由来: RECOMBINANT |
---|---|
分子量 | 値: 140 kDa/nm / 実験値: NO |
由来(天然) | 生物種: Mus musculus (ハツカネズミ) |
由来(組換発現) | 生物種: Komagataella pastoris (菌類) |
緩衝液 | pH: 7.5 |
試料 | 包埋: NO / シャドウイング: NO / 染色: NO / 凍結: YES |
試料支持 | グリッドの材料: COPPER |
急速凍結 | 凍結剤: ETHANE |
-電子顕微鏡撮影
実験機器 | モデル: Titan Krios / 画像提供: FEI Company |
---|---|
顕微鏡 | モデル: TFS 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): 2500 nm / 最小 デフォーカス(公称値): 1000 nm |
撮影 | 電子線照射量: 75 e/Å2 フィルム・検出器のモデル: GATAN K3 BIOQUANTUM (6k 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 | ||||||||||||||||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
EMソフトウェア |
| ||||||||||||||||||||||||
CTF補正 | タイプ: PHASE FLIPPING AND AMPLITUDE CORRECTION | ||||||||||||||||||||||||
3次元再構成 | 解像度: 2.6 Å / 解像度の算出法: FSC 0.143 CUT-OFF / 粒子像の数: 1184253 / 対称性のタイプ: POINT | ||||||||||||||||||||||||
原子モデル構築 | プロトコル: FLEXIBLE FIT / 空間: REAL | ||||||||||||||||||||||||
原子モデル構築 | PDB-ID: 6C0V Accession code: 6C0V / Source name: PDB / タイプ: experimental model | ||||||||||||||||||||||||
拘束条件 |
|