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基本情報
登録情報 | データベース: EMDB / ID: EMD-30849 | |||||||||
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タイトル | Structure of a human NHE1-CHP1 complex under pH 7.5, bound by cariporide | |||||||||
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![]() | Transporter / MEMBRANE PROTEIN | |||||||||
機能・相同性 | ![]() negative regulation of phosphatase activity / positive regulation of sodium:proton antiporter activity / cation-transporting ATPase complex / Sodium/Proton exchangers / regulation of the force of heart contraction by cardiac conduction / Hyaluronan degradation / positive regulation of protein glycosylation / membrane docking / regulation of cardiac muscle cell membrane potential / positive regulation of protein transport ...negative regulation of phosphatase activity / positive regulation of sodium:proton antiporter activity / cation-transporting ATPase complex / Sodium/Proton exchangers / regulation of the force of heart contraction by cardiac conduction / Hyaluronan degradation / positive regulation of protein glycosylation / membrane docking / regulation of cardiac muscle cell membrane potential / positive regulation of protein transport / negative regulation of protein autophosphorylation / positive regulation of phospholipid biosynthetic process / cellular response to electrical stimulus / potassium:proton antiporter activity / positive regulation of action potential / sodium:proton antiporter activity / maintenance of cell polarity / regulation of pH / sodium ion export across plasma membrane / positive regulation of calcineurin-NFAT signaling cascade / cardiac muscle cell differentiation / response to acidic pH / protein phosphatase 2B binding / microtubule bundle formation / membrane organization / intracellular sodium ion homeostasis / regulation of stress fiber assembly / cellular response to acidic pH / sodium ion import across plasma membrane / cardiac muscle cell contraction / positive regulation of mitochondrial membrane permeability / regulation of cardiac muscle contraction by calcium ion signaling / negative regulation of calcineurin-NFAT signaling cascade / regulation of focal adhesion assembly / cellular response to antibiotic / negative regulation of NF-kappaB transcription factor activity / transporter complex / small GTPase-mediated signal transduction / negative regulation of protein import into nucleus / positive regulation of cardiac muscle hypertrophy / cellular response to cold / protein kinase inhibitor activity / endoplasmic reticulum-Golgi intermediate compartment / positive regulation of the force of heart contraction / negative regulation of protein phosphorylation / protein complex oligomerization / intercalated disc / positive regulation of protein targeting to membrane / potassium channel regulator activity / negative regulation of protein kinase activity / transport vesicle / monoatomic ion transport / response to muscle stretch / phosphatidylinositol-4,5-bisphosphate binding / cytoplasmic microtubule organization / cellular response to epinephrine stimulus / potassium ion transmembrane transport / negative regulation of protein ubiquitination / T-tubule / proton transmembrane transport / protein export from nucleus / regulation of intracellular pH / stem cell differentiation / cellular response to mechanical stimulus / phospholipid binding / potassium ion transport / kinase binding / cellular response to insulin stimulus / calcium-dependent protein binding / cell migration / lamellipodium / microtubule cytoskeleton / positive regulation of cell growth / protein-macromolecule adaptor activity / cellular response to hypoxia / basolateral plasma membrane / microtubule binding / molecular adaptor activity / membrane fusion / calmodulin binding / protein stabilization / apical plasma membrane / positive regulation of apoptotic process / membrane raft / Golgi membrane / focal adhesion / calcium ion binding / negative regulation of apoptotic process / perinuclear region of cytoplasm / cell surface / endoplasmic reticulum / positive regulation of transcription by RNA polymerase II / mitochondrion / extracellular exosome / nucleoplasm / identical protein binding / nucleus / membrane / plasma membrane / cytoplasm 類似検索 - 分子機能 | |||||||||
生物種 | ![]() | |||||||||
手法 | 単粒子再構成法 / クライオ電子顕微鏡法 / 解像度: 3.5 Å | |||||||||
![]() | Dong Y / Gao Y / Li B / Zhang XC / Zhao Y | |||||||||
![]() | ![]() タイトル: Structure and mechanism of the human NHE1-CHP1 complex. 著者: Yanli Dong / Yiwei Gao / Alina Ilie / DuSik Kim / Annie Boucher / Bin Li / Xuejun C Zhang / John Orlowski / Yan Zhao / ![]() ![]() 要旨: Sodium/proton exchanger 1 (NHE1) is an electroneutral secondary active transporter present on the plasma membrane of most mammalian cells and plays critical roles in regulating intracellular pH and ...Sodium/proton exchanger 1 (NHE1) is an electroneutral secondary active transporter present on the plasma membrane of most mammalian cells and plays critical roles in regulating intracellular pH and volume homeostasis. Calcineurin B-homologous protein 1 (CHP1) is an obligate binding partner that promotes NHE1 biosynthetic maturation, cell surface expression and pH-sensitivity. Dysfunctions of either protein are associated with neurological disorders. Here, we elucidate structures of the human NHE1-CHP1 complex in both inward- and inhibitor (cariporide)-bound outward-facing conformations. We find that NHE1 assembles as a symmetrical homodimer, with each subunit undergoing an elevator-like conformational change during cation exchange. The cryo-EM map reveals the binding site for the NHE1 inhibitor cariporide, illustrating how inhibitors block transport activity. The CHP1 molecule differentially associates with these two conformational states of each NHE1 monomer, and this association difference probably underlies the regulation of NHE1 pH-sensitivity by CHP1. | |||||||||
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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: 1.04 Å | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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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 : Human NHE1-CHP1 complex under pH 7.5, bound by cariporide
全体 | 名称: Human NHE1-CHP1 complex under pH 7.5, bound by cariporide |
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要素 |
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-超分子 #1: Human NHE1-CHP1 complex under pH 7.5, bound by cariporide
超分子 | 名称: Human NHE1-CHP1 complex under pH 7.5, bound by cariporide タイプ: complex / ID: 1 / 親要素: 0 / 含まれる分子: #1-#2 |
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由来(天然) | 生物種: ![]() |
分子量 | 理論値: 230 KDa |
-超分子 #2: Sodium/protein exchanger 1 (NHE1) under pH 7.5, bound by cariporide
超分子 | 名称: Sodium/protein exchanger 1 (NHE1) under pH 7.5, bound by cariporide タイプ: complex / ID: 2 / 親要素: 1 / 含まれる分子: #1 |
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由来(天然) | 生物種: ![]() |
分子量 | 理論値: 182 KDa |
-超分子 #3: Calcineurin B homologous protein 1 (CHP1) under pH 7.5
超分子 | 名称: Calcineurin B homologous protein 1 (CHP1) under pH 7.5 タイプ: complex / ID: 3 / 親要素: 1 / 含まれる分子: #2 |
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-分子 #1: Calcineurin B homologous protein 1
分子 | 名称: Calcineurin B homologous protein 1 / タイプ: protein_or_peptide / ID: 1 / コピー数: 2 / 光学異性体: LEVO |
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由来(天然) | 生物種: ![]() |
分子量 | 理論値: 21.36983 KDa |
組換発現 | 生物種: ![]() |
配列 | 文字列: DEELEEIKKE TGFSHSQITR LYSRFTSLDK GENGTLSRED FQRIPELAIN PLGDRIINAF FPEGEDQVNF RGFMRTLAHF RPIEDNEKS KDVNGPEPLN SRSNKLHFAF RLYDLDKDEK ISRDELLQVL RMMVGVNISD EQLGSIADRT IQEADQDGDS A ASFTEFVK VLEKVDVEQK MSIRFLH UniProtKB: Calcineurin B homologous protein 1 |
-分子 #2: Sodium/hydrogen exchanger 1
分子 | 名称: Sodium/hydrogen exchanger 1 / タイプ: protein_or_peptide / ID: 2 / コピー数: 2 / 光学異性体: LEVO |
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由来(天然) | 生物種: ![]() |
分子量 | 理論値: 57.100363 KDa |
組換発現 | 生物種: ![]() |
配列 | 文字列: PRKAFPVLGI DYTHVRTPFE ISLWILLACL MKIGFHVIPT ISSIVPESCL LIVVGLLVGG LIKGVGETPP FLQSDVFFLF LLPPIILDA GYFLPLRQFT ENLGTILIFA VVGTLWNAFF LGGLMYAVCL VGGEQINNIG LLDNLLFGSI ISAVDPVAVL A VFEEIHIN ...文字列: PRKAFPVLGI DYTHVRTPFE ISLWILLACL MKIGFHVIPT ISSIVPESCL LIVVGLLVGG LIKGVGETPP FLQSDVFFLF LLPPIILDA GYFLPLRQFT ENLGTILIFA VVGTLWNAFF LGGLMYAVCL VGGEQINNIG LLDNLLFGSI ISAVDPVAVL A VFEEIHIN ELLHILVFGE SLLNDAVTVV LYHLFEEFAN YEHVGIVDIF LGFLSFFVVA LGGVLVGVVY GVIAAFTSRF TS HIRVIEP LFVFLYSYMA YLSAELFHLS GIMALIASGV VMRPYVEANI SHKSHTTIKY FLKMWSSVSE TLIFIFLGVS TVA GSHHWN WTFVISTLLF CLIARVLGVL GLTWFINKFR IVKLTPKDQF IIAYGGLRGA IAFSLGYLLD KKHFPMCDLF LTAI ITVIF FTVFVQGMTI RPLVDLLAVK KKQETKRSIN EEIHTQFLDH LLTGIEDICG HYGHHHWKDK LNRFNKKYVK KCLIA GERS KEPQLIAFYH KMEMKQAIEL VESGG UniProtKB: Sodium/hydrogen exchanger 1 |
-分子 #3: (1S)-2-{[{[(2R)-2,3-DIHYDROXYPROPYL]OXY}(HYDROXY)PHOSPHORYL]OXY}-...
分子 | 名称: (1S)-2-{[{[(2R)-2,3-DIHYDROXYPROPYL]OXY}(HYDROXY)PHOSPHORYL]OXY}-1-[(PALMITOYLOXY)METHYL]ETHYL STEARATE タイプ: ligand / ID: 3 / コピー数: 6 / 式: PGT |
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分子量 | 理論値: 751.023 Da |
Chemical component information | ![]() ChemComp-PGT: |
-分子 #4: N-[bis(azanyl)methylidene]-3-methylsulfonyl-4-propan-2-yl-benzamide
分子 | 名称: N-[bis(azanyl)methylidene]-3-methylsulfonyl-4-propan-2-yl-benzamide タイプ: ligand / ID: 4 / コピー数: 2 / 式: HG0 |
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分子量 | 理論値: 283.347 Da |
Chemical component information | ![]() ChemComp-HG0: |
-実験情報
-構造解析
手法 | クライオ電子顕微鏡法 |
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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 | 6 mg/mL |
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緩衝液 | pH: 7.5 |
グリッド | モデル: Quantifoil / 材質: COPPER / メッシュ: 200 / 支持フィルム - 材質: CARBON / 支持フィルム - トポロジー: HOLEY |
凍結 | 凍結剤: ETHANE / チャンバー内湿度: 100 % / チャンバー内温度: 277 K / 装置: FEI VITROBOT MARK III |
詳細 | The NHE1-CHP1 complex was reconstituted into lipid nanodiscs. |
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電子顕微鏡法
顕微鏡 | FEI TITAN KRIOS |
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特殊光学系 | エネルギーフィルター - 名称: GIF Bioquantum / エネルギーフィルター - スリット幅: 20 eV |
撮影 | フィルム・検出器のモデル: GATAN K2 SUMMIT (4k x 4k) 検出モード: SUPER-RESOLUTION / デジタル化 - サイズ - 横: 3838 pixel / デジタル化 - サイズ - 縦: 3710 pixel / デジタル化 - 画像ごとのフレーム数: 1-32 / 撮影したグリッド数: 1 / 実像数: 3855 / 平均電子線量: 60.0 e/Å2 |
電子線 | 加速電圧: 300 kV / 電子線源: ![]() |
電子光学系 | 照射モード: FLOOD BEAM / 撮影モード: BRIGHT FIELD / Cs: 2.7 mm / 最大 デフォーカス(公称値): 2.2 µm / 最小 デフォーカス(公称値): 1.2 µm / 倍率(公称値): 13000 |
試料ステージ | 試料ホルダーモデル: FEI TITAN KRIOS AUTOGRID HOLDER ホルダー冷却材: NITROGEN |
実験機器 | ![]() モデル: Titan Krios / 画像提供: FEI Company |
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画像解析
-原子モデル構築 1
精密化 | プロトコル: AB INITIO MODEL |
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得られたモデル | ![]() PDB-7dsx: |