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基本情報
登録情報 | データベース: PDB / ID: 1n8m | ||||||
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タイトル | Solution structure of Pi4, a four disulfide bridged scorpion toxin active on potassium channels | ||||||
![]() | Potassium channel blocking toxin 4 | ||||||
![]() | TOXIN / potassium channel blocker / disulfide bridge stabilized alpha beta motif | ||||||
機能・相同性 | Scorpion short toxins signature. / Scorpion short chain toxin, potassium channel inhibitor / Scorpion short toxin, BmKK2 / Knottin, scorpion toxin-like superfamily / ion channel inhibitor activity / potassium channel regulator activity / toxin activity / extracellular region / Potassium channel toxin alpha-KTx 6.4![]() | ||||||
手法 | 溶液NMR / torsion angle dynamics | ||||||
![]() | Guijarro, J.I. / M'Barek, S. / Olamendi-Portugal, T. / Gomez-Lagunas, F. / Garnier, D. / Rochat, H. / Possani, L.D. / Sabatier, J.M. / Delepierre, M. | ||||||
![]() | ![]() タイトル: Solution structure of Pi4, a short four-disulfide-bridged scorpion toxin specific of potassium channels. 著者: Guijarro, J.I. / M'Barek, S. / Gomez-Lagunas, F. / Garnier, D. / Rochat, H. / Sabatier, J.M. / Possani, L.D. / Delepierre, M. #1: ![]() タイトル: Two similar peptides from the venom of the scorpion Pandinus imperator, one highly effective blocker and the other inactive on K+ channels 著者: Olamendi-Portugal, T. / Gomez-Lagunas, F. / Gurrola, G.B. / Possani, L.D. | ||||||
履歴 |
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構造の表示
構造ビューア | 分子: ![]() ![]() |
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PDBx/mmCIF形式 | ![]() | 115.9 KB | 表示 | ![]() |
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PDB形式 | ![]() | 94.2 KB | 表示 | ![]() |
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その他 | ![]() |
-検証レポート
アーカイブディレクトリ | ![]() ![]() | HTTPS FTP |
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-関連構造データ
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リンク
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集合体
登録構造単位 | ![]()
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NMR アンサンブル |
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要素
#1: タンパク質・ペプチド | 分子量: 4195.964 Da / 分子数: 1 / 由来タイプ: 合成 詳細: This sequence occurs naturally in the venom of Pandinus imperator scorpions, with an amidated C-terminus. It was established by NMR that the structure of the natural toxin extracted from ...詳細: This sequence occurs naturally in the venom of Pandinus imperator scorpions, with an amidated C-terminus. It was established by NMR that the structure of the natural toxin extracted from scorpion venom is effectively identical to the structure of the synthetic toxin, which has a carboxylated C-terminus. 参照: UniProt: P58498 |
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Has protein modification | Y |
-実験情報
-実験
実験 | 手法: 溶液NMR | ||||||||||||||||
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NMR実験 |
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NMR実験の詳細 | Text: Disulfide bridges were determined by NMR and by N-terminal sequencing of proteolysis peptides. Distance constraints were derived from initial nOe build up rates using 2D NOESY experiments with ...Text: Disulfide bridges were determined by NMR and by N-terminal sequencing of proteolysis peptides. Distance constraints were derived from initial nOe build up rates using 2D NOESY experiments with mixing times of 70, 100, 150, 200 and 250 ms in H2O and D2O. |
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試料調製
詳細 |
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試料状態 | イオン強度: 5 / pH: 4 / 圧: ambient / 温度: 303 K | |||||||||
結晶化 | *PLUS 手法: other / 詳細: NMR |
-NMR測定
放射 | プロトコル: SINGLE WAVELENGTH / 単色(M)・ラウエ(L): M |
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放射波長 | 相対比: 1 |
NMRスペクトロメーター | タイプ: Varian INOVA / 製造業者: Varian / モデル: INOVA / 磁場強度: 500 MHz |
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解析
NMR software |
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精密化 | 手法: torsion angle dynamics / ソフトェア番号: 1 詳細: Structures are based on a total of 705 constraints, 679 are meaningful nOe derived constraints (642 unambiguous, 37 ambiguous), 16 are dihedral (phi) angle constraints and 10 are hydrogen ...詳細: Structures are based on a total of 705 constraints, 679 are meaningful nOe derived constraints (642 unambiguous, 37 ambiguous), 16 are dihedral (phi) angle constraints and 10 are hydrogen bonds. The four disulfide bridges (CYS 6-27, 12-32, 16-34, 22-37) were included in the topology file used for the calculations. | ||||||||||||||||||||||||
代表構造 | 選択基準: lowest energy | ||||||||||||||||||||||||
NMRアンサンブル | コンフォーマー選択の基準: structures with the lowest energy 計算したコンフォーマーの数: 20 / 登録したコンフォーマーの数: 10 |