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基本情報
登録情報 | データベース: PDB / ID: 9kba | |||||||||||||||
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タイトル | The occluded structures of BjSemiSWEET in native cellular membranes determined by in situ solid-state NMR | |||||||||||||||
![]() | Sugar transporter SemiSWEET | |||||||||||||||
![]() | MEMBRANE PROTEIN / Membrane transporter / SemiSWEET / occluded / in situ Structure | |||||||||||||||
機能・相同性 | : / sugar transmembrane transporter activity / PQ-loop repeat / PQ loop repeat / plasma membrane / Sugar transporter SemiSWEET![]() | |||||||||||||||
生物種 | ![]() | |||||||||||||||
手法 | 個体NMR / simulated annealing | |||||||||||||||
![]() | Xie, H. / Yang, J. | |||||||||||||||
資金援助 | ![]()
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![]() | ![]() タイトル: Two functional conformations of a membrane transporter and their transition in native cellular membranes: distinct from those in synthetic membranes 著者: Xie, H. / Yang, J. | |||||||||||||||
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構造の表示
構造ビューア | 分子: ![]() ![]() |
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-検証レポート
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-関連構造データ
関連構造データ | ![]() 9kaxC C: 同じ文献を引用 ( |
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NMR アンサンブル |
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要素
#1: タンパク質 | 分子量: 9198.216 Da / 分子数: 2 / 由来タイプ: 組換発現 由来: (組換発現) ![]() 株: Bradyrhizobium diazoefficiens USDA 110 (strain: USDA110 遺伝子: bsr6460 / 発現宿主: ![]() ![]() Has protein modification | N | |
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-実験情報
-実験
実験 | 手法: 個体NMR | ||||||||||||||||||||||||||||||
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NMR実験 |
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試料調製
詳細 | タイプ: membrane 内容: 60 % w/w [U-13C; U-15N] Sucrose transport protein, Bradyrhizobium japonicum SemiSWEET (BjSemiSWEET), H2O 詳細: BjSemiSWEET cellular membrane samples were derived from Escherichia coli cells. The total cellular membrane fraction was obtained through density gradient centrifugation and subsequently ...詳細: BjSemiSWEET cellular membrane samples were derived from Escherichia coli cells. The total cellular membrane fraction was obtained through density gradient centrifugation and subsequently purified using an enhanced sucrose gradient centrifugation method50. The cellular membranes were resuspended in lysis buffer (20 mM Tris, 100 mM NaCl, pH 8.2) and homogenized via gentle sonication before centrifugation. A layering technique was then applied, sequentially adding 2.7 mL of 60% (w/v) sucrose, 3.5 mL of 51% (w/v) sucrose, 3 mL of 35% (w/v) sucrose, and 4 mL of the total membrane suspension from bottom to top in a tube. Centrifugation was carried out using an SW-40Ti rotor (Beckman) at 169818 g for 16 hours. The inner membrane fraction between the 35% and 51% (w/v) sucrose layers was collected, as well as the outer membranes at the 51%-60% sucrose interface. To collect the inner membranes, 2 mL of the sample was diluted with water to fill an 8.9 mL Beckman centrifuge tube and centrifuged at 419832 g for 3 hours. After freeze-drying, rehydration with 30% (w/w) water was followed by packing into a 3.2 mm thin-walled rotor for solid-state NMR (ssNMR) experiments. Label: [U-13C; U-15N] / 溶媒系: H2O |
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試料 | 濃度: 60 % w/w 構成要素: Sucrose transport protein, Bradyrhizobium japonicum SemiSWEET (BjSemiSWEET) Isotopic labeling: [U-13C; U-15N] |
試料状態 | 詳細: BjSemiSWEET cellular membrane samples were derived from Escherichia coli cells. The total cellular membrane fraction was obtained through density gradient centrifugation and subsequently ...詳細: BjSemiSWEET cellular membrane samples were derived from Escherichia coli cells. The total cellular membrane fraction was obtained through density gradient centrifugation and subsequently purified using an enhanced sucrose gradient centrifugation method50. The cellular membranes were resuspended in lysis buffer (20 mM Tris, 100 mM NaCl, pH 8.2) and homogenized via gentle sonication before centrifugation. A layering technique was then applied, sequentially adding 2.7 mL of 60% (w/v) sucrose, 3.5 mL of 51% (w/v) sucrose, 3 mL of 35% (w/v) sucrose, and 4 mL of the total membrane suspension from bottom to top in a tube. Centrifugation was carried out using an SW-40Ti rotor (Beckman) at 169818 g for 16 hours. The inner membrane fraction between the 35% and 51% (w/v) sucrose layers was collected, as well as the outer membranes at the 51%-60% sucrose interface. To collect the inner membranes, 2 mL of the sample was diluted with water to fill an 8.9 mL Beckman centrifuge tube and centrifuged at 419832 g for 3 hours. After freeze-drying, rehydration with 30% (w/w) water was followed by packing into a 3.2 mm thin-walled rotor for solid-state NMR (ssNMR) experiments. イオン強度: 1 M / Ionic strength err: 0.2 / Label: [U-13C; U-15N] / pH: 8.2 / PH err: 0.1 / 圧: 1 mbar / Pressure err: 0.01 / 温度: 298 K / Temperature err: 0.2 |
-NMR測定
NMRスペクトロメーター | タイプ: Bruker Bruker AVANCE III 800 / 製造業者: Bruker / モデル: Bruker AVANCE III 800 / 磁場強度: 800 MHz 詳細: Solid-state NMR experiments, including NCACX, NCOCX, CONCA, and NCACB, were conducted on BjSemiSWEET's cellular membrane samples using a standard Bruker Advance 800 MHz spectrometer equipped ...詳細: Solid-state NMR experiments, including NCACX, NCOCX, CONCA, and NCACB, were conducted on BjSemiSWEET's cellular membrane samples using a standard Bruker Advance 800 MHz spectrometer equipped with a 3.2-mm E-free HCN MAS probe spinning at 10.5 kHz and 273 K. |
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解析
NMR software |
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精密化 | 手法: simulated annealing / ソフトェア番号: 2 詳細: A total of 1000 structures were de novo generated through molecular dynamics simulated annealing in torsion angle space with two consecutive annealing schedules, followed by final gradient ...詳細: A total of 1000 structures were de novo generated through molecular dynamics simulated annealing in torsion angle space with two consecutive annealing schedules, followed by final gradient minimization in Cartesian space. Each structure was subject to specific constraints: 379*2 unique non-redundant 13C-13C distance constraints, 74*2 hydrogen bond constraints, and 81*2 TALOS-N derived torsion angle constrained chains for comformation I, per BjSemiSWEET dimer structure. | |||||||||||||||
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: 1000 / 登録したコンフォーマーの数: 10 |