+データを開く
-基本情報
登録情報 | データベース: SASBDB / ID: SASDBH7 |
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試料 | Dps1 truncated, DNA binding protein under starvation conditions (SEC-SAXS)
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機能・相同性 | 機能・相同性情報 酸化還元酵素; 金属イオンを酸化する / oxidoreductase activity, acting on metal ions / nucleoid / ferric iron binding / intracellular iron ion homeostasis / DNA binding / cytoplasm 類似検索 - 分子機能 |
生物種 | Deinococcus radiodurans R1 (放射線耐性) |
引用 | ジャーナル: J Mol Biol / 年: 2017 タイトル: SAXS Structural Studies of Dps from Deinococcus radiodurans Highlights the Conformation of the Mobile N-Terminal Extensions. 著者: Sandra P Santos / Maxime G Cuypers / Adam Round / Stephanie Finet / Theyencheri Narayanan / Edward P Mitchell / Célia V Romão / 要旨: The radiation-resistant bacterium Deinococcus radiodurans contains two DNA-binding proteins from starved cells (Dps): Dps1 (DR2263) and Dps2 (DRB0092). These are suggested to play a role in DNA ...The radiation-resistant bacterium Deinococcus radiodurans contains two DNA-binding proteins from starved cells (Dps): Dps1 (DR2263) and Dps2 (DRB0092). These are suggested to play a role in DNA interaction and manganese and iron storage. The proteins assemble as a conserved dodecameric structure with structurally uncharacterised N-terminal extensions. In the case of DrDps1, these extensions have been proposed to be involved in DNA interactions, while in DrDps2, their function has yet to be established. The reported data reveal the relative position of the N-terminal extensions to the dodecameric sphere in solution for both Dps. The low-resolution small angle X-ray scattering (SAXS) results show that the N-terminal extensions protrude from the spherical shell of both proteins. The SAXS envelope of a truncated form of DrDps1 without the N-terminal extensions appears as a dodecameric sphere, contrasting strongly with the protrusions observed in the full-length models. The effect of iron incorporation into DrDps2 was investigated by static and stopped-flow SAXS measurements, revealing dynamic structural changes upon iron binding and core formation, as reflected by a quick alteration of its radius of gyration. The truncated and full-length versions of DrDps were also compared on the basis of their interaction with DNA to analyse functional roles of the N-terminal extensions. DrDps1 N-terminal protrusions appear to be directly involved with DNA, whilst those from DrDps2 are indirectly associated with DNA binding. Furthermore, detection of DrDps2 in the D. radiodurans membrane fraction suggests that the N-terminus of the protein interacts with the membrane. |
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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 #889 | タイプ: dummy / ソフトウェア: (2.2i) / ダミー原子の半径: 1.90 A / 対称性: P23 / カイ2乗値: 10.5625 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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-試料
試料 | 名称: Dps1 truncated, DNA binding protein under starvation conditions (SEC-SAXS) 試料濃度: 10 mg/ml |
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バッファ | 名称: 20 mM Tris-HCl, 150 mM NaCl / pH: 7.5 |
要素 #422 | 名称: Dps1t / タイプ: protein 記述: N-terminal truncated DNA protection during starvation protein 1 分子量: 18.037 / 分子数: 12 / 由来: Deinococcus radiodurans R1 / 参照: UniProt: Q9RS64 配列: HYLEEKEFQT VAETLQRNLA TTISLYLKFK KYHWDIRGRF FRDLHLAYDE FIAEIFPSID EQAERLVALG GSPLAAPADL ARYSTVQVPQ ETVRDARTQV ADLVQDLSRV GKGYRDDSQA CDEANDPVTA DMYNGYAATI DKIRWMLQAI MDDERLD |
-実験情報
ビーム | 設備名称: ESRF BM29 / 地域: Grenoble / 国: France / 線源: X-ray synchrotron / 波長: 0.09919 Å / スペクトロメータ・検出器間距離: 2.81 mm | |||||||||||||||||||||||||||||||||
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検出器 | 名称: Pilatus 1M | |||||||||||||||||||||||||||||||||
スキャン | タイトル: Dps1 truncated, DNA binding protein under starvati 測定日: 2013年11月22日 / 保管温度: 20 °C / セル温度: 20 °C / 照射時間: 1 sec. / フレーム数: 1500 / 単位: 1/nm /
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距離分布関数 P(R) | ソフトウェア P(R): GNOM 5.0 / ポイント数: 451 /
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結果 | カーブのタイプ: sec
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