+データを開く
-基本情報
登録情報 | データベース: SASBDB / ID: SASDCY9 |
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試料 | Oxidised chloroplastic calvin cycle protein CP12 from C. reinhardtii
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機能・相同性 | 機能・相同性情報 supramolecular complex / negative regulation of reductive pentose-phosphate cycle / reductive pentose-phosphate cycle / nickel cation binding / chloroplast / positive regulation of protein-containing complex assembly / molecular adaptor activity / copper ion binding / enzyme binding / protein-containing complex 類似検索 - 分子機能 |
生物種 | Chlamydomonas reinhardtii (クラミドモナス) |
引用 | ジャーナル: J Mol Biol / 年: 2018 タイトル: Cryptic Disorder Out of Disorder: Encounter between Conditionally Disordered CP12 and Glyceraldehyde-3-Phosphate Dehydrogenase. 著者: Hélène Launay / Patrick Barré / Carine Puppo / Yizhi Zhang / Stéphanie Maneville / Brigitte Gontero / Véronique Receveur-Bréchot / 要旨: Among intrinsically disordered proteins, conditionally disordered proteins undergo dramatic structural disorder rearrangements upon environmental changes and/or post-translational modifications that ...Among intrinsically disordered proteins, conditionally disordered proteins undergo dramatic structural disorder rearrangements upon environmental changes and/or post-translational modifications that directly modulate their function. Quantifying the dynamics of these fluctuating proteins is extremely challenging but paramount to understanding the regulation of their function. The chloroplast protein CP12 is a model of such proteins and acts as a redox switch by formation/disruption of its two disulfide bridges. It regulates the Calvin cycle by forming, in oxidized conditions, a supramolecular complex with glyceraldehyde-3-phosphate dehydrogenase (GAPDH) and then phosphoribulokinase. In this complex, both enzymes are inactive. The highly dynamic nature of CP12 has so far hindered structural characterization explaining its mode of action. Thanks to a synergistic combination of small-angle X-ray scattering, nuclear magnetic resonance and circular dichroism that drove the molecular modeling of structural ensembles, we deciphered the structural behavior of Chlamydomonas reinhardtii oxidized CP12 alone and in the presence of GAPDH. Contrary to sequence-based structural predictions, the N-terminal region is unstable, oscillates at the ms timescale between helical and random conformations, and is connected through a disordered linker to its C-terminus, which forms a stable helical turn. Upon binding to GAPDH, oxidized CP12 undergoes an induced unfolding of its N-terminus. This phenomenon called cryptic disorder contributes to decrease the entropy cost and explains CP12 unusual high affinity for its partners. |
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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
-モデル
モデル #1697 | タイプ: dummy / ダミー原子の半径: 1.90 A / カイ2乗値: 2.84 / P-value: 0.000022 Omokage検索でこの集合体の類似形状データを探す (詳細) |
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モデル #1698 | タイプ: dummy / ダミー原子の半径: 2.00 A / 対称性: P1 / カイ2乗値: 2.367 / P-value: 0.793560 Omokage検索でこの集合体の類似形状データを探す (詳細) |
-試料
試料 | 名称: Oxidised chloroplastic calvin cycle protein CP12 from C. reinhardtii 試料濃度: 0.54 mg/ml |
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バッファ | 名称: 50 mM phosphate buffer, 50 mM NaCl, 20 mM oxidized DTT pH: 6.5 |
要素 #907 | 名称: CP12 / タイプ: protein / 記述: Calvin cycle protein CP12, chloroplastic / 分子量: 10.934 / 分子数: 1 / 由来: Chlamydomonas reinhardtii / 参照: UniProt: A6Q0K5 配列: HHHHHHHHHH SSGHIEGRHM SGQPAVDLNK KVQDAVKEAE DACAKGTSAD CAVAWDTVEE LSAAVSHKKD AVKADVTLTD PLEAFCKDAP DADECRVYED |
-実験情報
ビーム | 設備名称: SOLEIL SWING / 地域: Saint-Aubin / 国: France / 線源: X-ray synchrotron / 波長: 0.1033 Å / スペクトロメータ・検出器間距離: 1.79 mm | |||||||||||||||||||||||||||||||||||||||
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検出器 | 名称: AVIEX PCCD170170 / タイプ: CCD | |||||||||||||||||||||||||||||||||||||||
スキャン | タイトル: Oxidised chloroplastic calvin cycle protein CP12 from C. reinhardtii 測定日: 2015年11月3日 / 保管温度: 15 °C / セル温度: 20 °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) | ソフトウェア P(R): GNOM 4.6 / ポイント数: 398 /
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結果 | カーブのタイプ: sec
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