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基本情報
登録情報 | データベース: PDB / ID: 2n7j | ||||||
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タイトル | Sidechain chi1 distribution in B3 domain of protein G from extensive sets of residual dipolar couplings | ||||||
![]() | Immunoglobulin G-binding protein G | ||||||
![]() | SIGNALING PROTEIN | ||||||
機能・相同性 | ![]() | ||||||
生物種 | ![]() | ||||||
手法 | 溶液NMR / simulated annealing | ||||||
![]() | Grishaev, A. / Li, F. / Ying, J. / Bax, A. | ||||||
![]() | ![]() タイトル: Side Chain Conformational Distributions of a Small Protein Derived from Model-Free Analysis of a Large Set of Residual Dipolar Couplings. 著者: Li, F. / Grishaev, A. / Ying, J. / Bax, A. | ||||||
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集合体
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NMR アンサンブル |
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要素
#1: 抗体 | 分子量: 6214.848 Da / 分子数: 1 / 断片: residues 299-352 / 由来タイプ: 組換発現 由来: (組換発現) ![]() 遺伝子: spg / 発現宿主: ![]() ![]() |
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-実験情報
-実験
実験 | 手法: 溶液NMR 詳細: The backbone structure of the B3 domain of protein G is obtained as a single-conformation fit of an extensive set of backbone and Ca-Cb RDCs measured under multiple alignment orientations. ...詳細: The backbone structure of the B3 domain of protein G is obtained as a single-conformation fit of an extensive set of backbone and Ca-Cb RDCs measured under multiple alignment orientations. Sidechain chi1 angle distributions are obtained from an ensemble fit to the experimental sidechain RDCs measured under six alignment orientations. Fitted data included separate CB-HB2 and CB-HB3 RDCs when available, as well as their sums (measured separately) as well as Cb-Cg RDCs where available. | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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NMR実験 |
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NMR実験の詳細 | Text: MODEL 1 SHOWS THE SIDECHAIN CONFORMERS IN THEIR MOST POPULATED CONFORMATIONS. MODELS 2-20 SHOW THE STATISTICAL DISTRIBUTION OF SIDECHAIN CONFORMERS CONSISTENT WITH THE SIDECHAIN RDC DATA. NOTE ...Text: MODEL 1 SHOWS THE SIDECHAIN CONFORMERS IN THEIR MOST POPULATED CONFORMATIONS. MODELS 2-20 SHOW THE STATISTICAL DISTRIBUTION OF SIDECHAIN CONFORMERS CONSISTENT WITH THE SIDECHAIN RDC DATA. NOTE THAT EXCEPT FOR RESIDUES POPULATING A SINGLE NARROWLY DISTRIBUTED RANGE OF CHI1 VALUES, SIDECHAIN RDCS ARE INCONSISTENT WITH ANY OF THE INDIVIDUAL MODELS. |
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試料調製
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試料状態 | イオン強度: 0.05 / pH: 6.5 / 圧: ambient / 温度: 293 K |
-NMR測定
NMRスペクトロメーター |
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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: 1 詳細: STRUCTURES WERE OBTAINED BY A SINGLE-CONFORMER SIMULATED ANNEALING REFINEMENT WITH VARIABLE ALIGNMENT TENSORS AGAINST AN EXTENSIVE SET OF BACKBONE AND CA-CB RDCS IN MULTIPLE ALIGNMENT MEDIA, ...詳細: STRUCTURES WERE OBTAINED BY A SINGLE-CONFORMER SIMULATED ANNEALING REFINEMENT WITH VARIABLE ALIGNMENT TENSORS AGAINST AN EXTENSIVE SET OF BACKBONE AND CA-CB RDCS IN MULTIPLE ALIGNMENT MEDIA, J-COUPLINGS INCLUDING HN-HA, C'-C', AND THROUGH HYDROGEN BOND N-C', AND A BACKBONE-BACKBONE HYDROGEN BONDING DATABASE-DERIVED POTENTIAL OF MEAN FORCE. BACKBONE GEOMETRIES RESULTING FROM THIS STEP WERE KEPT FIXED UP TO CB ATOMS AND CHI1 TORSION ANGLES WERE RANDOMLY SELECTED TO SAMPLE THE DISTRIBUTIONS DERIVED FROM THE ANALYSIS OF AN EXTENSIVE DATASET OF CB-CG AND CB-HB RDCS IN 6 ALIGNMENT MEDIA. CLASHING WAS MINIMIZED BY RANDOMLY SAMPLING CHI2, CHI3 AND CHI4 TORSION ANGLES SELECTED FROM THE KINEMAGE DATABASE. MODELS 2-20 SHOWING MINIMAL CLASHING WERE THEN SELECTED FOR DEPOSITION. | ||||||||||||
NMR constraints | Hydrogen bond constraints total count: 34 | ||||||||||||
代表構造 | 選択基準: sidechain conformers in their most populated conformations | ||||||||||||
NMRアンサンブル | コンフォーマー選択の基準: structures with favorable non-bond energy 計算したコンフォーマーの数: 100 / 登録したコンフォーマーの数: 20 |