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基本情報
登録情報 | データベース: SASBDB / ID: SASDCL9 |
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![]() | Catalytic domain (AC) of B. Pertussis Adenylate Cyclase Toxin (CyaA) in complex with calmodulin
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機能・相同性 | ![]() calcium- and calmodulin-responsive adenylate cyclase activity / hemolysis in another organism / : / adenylate cyclase / establishment of protein localization to mitochondrial membrane / type 3 metabotropic glutamate receptor binding / cAMP biosynthetic process / adenylate cyclase activity / channel activity / regulation of synaptic vesicle endocytosis ...calcium- and calmodulin-responsive adenylate cyclase activity / hemolysis in another organism / : / adenylate cyclase / establishment of protein localization to mitochondrial membrane / type 3 metabotropic glutamate receptor binding / cAMP biosynthetic process / adenylate cyclase activity / channel activity / regulation of synaptic vesicle endocytosis / negative regulation of high voltage-gated calcium channel activity / positive regulation of cyclic-nucleotide phosphodiesterase activity / negative regulation of calcium ion export across plasma membrane / regulation of synaptic vesicle exocytosis / regulation of cardiac muscle cell action potential / response to corticosterone / nitric-oxide synthase binding / positive regulation of ryanodine-sensitive calcium-release channel activity / regulation of cell communication by electrical coupling involved in cardiac conduction / negative regulation of peptidyl-threonine phosphorylation / protein phosphatase activator activity / positive regulation of phosphoprotein phosphatase activity / adenylate cyclase binding / catalytic complex / detection of calcium ion / regulation of cardiac muscle contraction / negative regulation of ryanodine-sensitive calcium-release channel activity / positive regulation of DNA binding / regulation of cardiac muscle contraction by regulation of the release of sequestered calcium ion / phosphatidylinositol 3-kinase binding / regulation of release of sequestered calcium ion into cytosol by sarcoplasmic reticulum / enzyme regulator activity / positive regulation of protein dephosphorylation / regulation of calcium-mediated signaling / titin binding / positive regulation of protein autophosphorylation / voltage-gated potassium channel complex / calcium channel complex / response to amphetamine / activation of adenylate cyclase activity / substantia nigra development / adenylate cyclase activator activity / nitric-oxide synthase regulator activity / regulation of heart rate / sarcomere / protein serine/threonine kinase activator activity / regulation of cytokinesis / positive regulation of peptidyl-threonine phosphorylation / positive regulation of nitric-oxide synthase activity / mitochondrial membrane / positive regulation of protein serine/threonine kinase activity / spindle microtubule / synaptic vesicle membrane / spindle pole / response to calcium ion / G2/M transition of mitotic cell cycle / calcium-dependent protein binding / disordered domain specific binding / myelin sheath / toxin activity / positive regulation of cytosolic calcium ion concentration / growth cone / vesicle / transmembrane transporter binding / calmodulin binding / G protein-coupled receptor signaling pathway / protein domain specific binding / centrosome / calcium ion binding / protein kinase binding / host cell plasma membrane / protein-containing complex / extracellular region / ATP binding / membrane / nucleus / plasma membrane / cytoplasm 類似検索 - 分子機能 |
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![]() | ![]() タイトル: Calmodulin fishing with a structurally disordered bait triggers CyaA catalysis. 著者: Darragh P O'Brien / Dominique Durand / Alexis Voegele / Véronique Hourdel / Marilyne Davi / Julia Chamot-Rooke / Patrice Vachette / Sébastien Brier / Daniel Ladant / Alexandre Chenal / ![]() 要旨: Once translocated into the cytosol of target cells, the catalytic domain (AC) of the adenylate cyclase toxin (CyaA), a major virulence factor of Bordetella pertussis, is potently activated by binding ...Once translocated into the cytosol of target cells, the catalytic domain (AC) of the adenylate cyclase toxin (CyaA), a major virulence factor of Bordetella pertussis, is potently activated by binding calmodulin (CaM) to produce supraphysiological levels of cAMP, inducing cell death. Using a combination of small-angle X-ray scattering (SAXS), hydrogen/deuterium exchange mass spectrometry (HDX-MS), and synchrotron radiation circular dichroism (SR-CD), we show that, in the absence of CaM, AC exhibits significant structural disorder, and a 75-residue-long stretch within AC undergoes a disorder-to-order transition upon CaM binding. Beyond this local folding, CaM binding induces long-range allosteric effects that stabilize the distant catalytic site, whilst preserving catalytic loop flexibility. We propose that the high enzymatic activity of AC is due to a tight balance between the CaM-induced decrease of structural flexibility around the catalytic site and the preservation of catalytic loop flexibility, allowing for fast substrate binding and product release. The CaM-induced dampening of AC conformational disorder is likely relevant to other CaM-activated enzymes. |
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構造の表示
構造ビューア | 分子: ![]() ![]() |
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ダウンロードとリンク
-モデル
モデル #1694 | ![]() タイプ: mix / ソフトウェア: (08) / ダミー原子の半径: 1.90 A / カイ2乗値: 1.956 ![]() |
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モデル #1696 | ![]() タイプ: atomic / ソフトウェア: (2.1) / ダミー原子の半径: 1.90 A / カイ2乗値: 1.410 / P-value: 0.000713 ![]() |
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試料
![]() | 名称: Catalytic domain (AC) of B. Pertussis Adenylate Cyclase Toxin (CyaA) in complex with calmodulin Entity id: 904 / 905 |
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バッファ | 名称: 20 mM Hepes, 150 mM NaCl, 4 mM CaCl2 / pH: 7.4 |
要素 #904 | 名称: AC domain from CyaA / タイプ: protein / 記述: Bifunctional hemolysin/adenylate cyclase / 分子量: 39.38 / 分子数: 1 由来: Bordetella pertussis (strain Tohama I / ATCC BAA-589 / NCTC 13251) 参照: UniProt: P0DKX7 配列: MQQSHQAGYA NAADRESGIP AAVLDGIKAV AKEKNATLMF RLVNPHSTSL IAEGVATKGL GVHAKSSDWG LQAGYIPVNP NLSKLFGRAP EVIARADNDV NSSLAHGHTA VDLTLSKERL DYLRQAGLVT GMADGVVASN HAGYEQFEFR VKETSDGRYA VQYRRKGGDD ...配列: MQQSHQAGYA NAADRESGIP AAVLDGIKAV AKEKNATLMF RLVNPHSTSL IAEGVATKGL GVHAKSSDWG LQAGYIPVNP NLSKLFGRAP EVIARADNDV NSSLAHGHTA VDLTLSKERL DYLRQAGLVT GMADGVVASN HAGYEQFEFR VKETSDGRYA VQYRRKGGDD FEAVKVIGNA AGIPLTADID MFAIMPHLSN FRDSARSSVT SGDSVTDYLA RTRRAASEAT GGLDRERIDL LWKIARAGAR SAVGTEARRQ FRYDGDMNIG VITDFELEVR NALNRRAHAV GAQDVVQHGT EQNNPFPEAD EKIFVVSATG ESQMLTRGQL KEYIGQQRGE GYVFYENRAY GVAGKSLFDD GLGA |
要素 #905 | 名称: CaM / タイプ: protein / 記述: Calmodulin / 分子量: 16.837 / 分子数: 1 / 由来: Homo sapiens / 参照: UniProt: P62158 配列: MADQLTEEQI AEFKEAFSLF DKDGDGTITT KELGTVMRSL GQNPTEAELQ DMINEVDADG NGTIDFPEFL TMMARKMKDT DSEEEIREAF RVFDKDGNGY ISAAELRHVM TNLGEKLTDE EVDEMIREAD IDGDGQVNYE EFVQMMTAK |
-実験情報
ビーム | 設備名称: SOLEIL SWING ![]() ![]() | ||||||||||||||||||||||||||||||||||||||||||
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検出器 | 名称: AVIEX / タイプ: CCD | ||||||||||||||||||||||||||||||||||||||||||
スキャン | 測定日: 2015年6月19日 / 保管温度: 10 °C / セル温度: 15 °C / 照射時間: 1.5 sec. / フレーム数: 250 / 単位: 1/A /
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距離分布関数 P(R) |
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結果 | コメント: The scattered intensities were displayed on an absolute scale (cm-1) using the scattering of water. Frames were examined individually and 20 identical frames were averaged and further ...コメント: The scattered intensities were displayed on an absolute scale (cm-1) using the scattering of water. Frames were examined individually and 20 identical frames were averaged and further processed. The corresponding concentration was 0.82 g/L. Three independent determinations of the molecular mass were obtained from the value of I(0)/c, where c is the protein concentration, and using the programs SAXSMow2 and ScÅtter3 available at the URLs http://saxs.ifsc.usp.br/ and https://bl1231.als.lbl.gov/scatter/, respectively. The average value is The average value is MWexperimental=56.3 kDa. AC-CAM complex: Top panel: Comparison of the experimental data (blue dots) with the calculated scattering pattern (red line) of the BUNCH model shown on the right. chi2=1.96. Each CaM domain were handled as rigid bodies while the program searches an optimal conformation of the inter-domain helix of CaM. Bottom panel: Typical ensemble of conformations describing the AC:CaM complex, obtained using the program EOM and displayed after superimposition of the AC moiety of each conformation. chi2=1.41. The corresponding scattering curve is shown in red superimposed over experimental data (blue dots).
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