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基本情報
登録情報 | データベース: PDB / ID: 1n14 | ||||||
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タイトル | Structure and Dynamics of Thioguanine-modified Duplex DNA in Comparison with Unmodified DNA; Structure of Unmodified Duplex DNA | ||||||
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![]() | DNA / mercaptopurine / thioguanine / anti-cancer therapy | ||||||
機能・相同性 | DNA / DNA (> 10)![]() | ||||||
手法 | 溶液NMR / restrained molecular dynamics, relaxation matrix analysis | ||||||
![]() | Somerville, L. / Krynetski, E.Y. / Krynetskaia, N.F. / Beger, R.D. / Zhang, W. / Marhefka, C.A. / Evans, W.E. / Kriwacki, R.W. | ||||||
![]() | ![]() タイトル: Structure and dynamics of thioguanine-modified duplex DNA 著者: Somerville, L. / Krynetski, E.Y. / Krynetskaia, N.F. / Beger, R.D. / Zhang, W. / Marhefka, C.A. / Evans, W.E. / Kriwacki, R.W. | ||||||
履歴 |
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構造の表示
構造ビューア | 分子: ![]() ![]() |
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ダウンロードとリンク
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PDBx/mmCIF形式 | ![]() | 379.6 KB | 表示 | ![]() |
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PDB形式 | ![]() | 272 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: DNA鎖 | 分子量: 4009.637 Da / 分子数: 1 / 由来タイプ: 合成 |
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#2: DNA鎖 | 分子量: 3933.558 Da / 分子数: 1 / 由来タイプ: 合成 |
-実験情報
-実験
実験 | 手法: 溶液NMR | ||||||||||||||||
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NMR実験 |
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試料調製
詳細 | 内容: Single-stranded oligodeoxyribonucleotides, d(5-GCTAAGGAAAGCC-3) and the complementary strand d(5-GGCTTTCCTTAGC-3), were synthesized using standard phosphoramidite chemistry. Single-stranded ...内容: Single-stranded oligodeoxyribonucleotides, d(5-GCTAAGGAAAGCC-3) and the complementary strand d(5-GGCTTTCCTTAGC-3), were synthesized using standard phosphoramidite chemistry. Single-stranded DNA molecules were purified using anion exchange chromatography (MonoQ HR 5/5, Pharmacia Biotech). Purity was confirmed by UV spectroscopy, analytical anion exchange chromatography, and mass spectrometry. The GC and thioGC DNA duplexes were each prepared by annealing either equimolar amounts of complimentary strands or a 1.2 molar excess of the unmodified strand to the modified strand in Buffer A (10 mM sodium phosphate, 50 mM NaCl, pH 7.0) at 70 C for 5 min., followed by slow cooling over 12 hours to room temperature. DNA duplexes were purified using gel filtration chromatography (Superdex Peptide HR 10/30, Pharmacia Biotech) in Buffer A. 溶媒系: Buffer A (10 mM sodium phosphate, 50 mM NaCl, pH 7.0) |
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試料状態 | イオン強度: approx. 65 mM / pH: 7 / 圧: ambient / 温度: 293 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 |
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解析
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精密化 | 手法: restrained molecular dynamics, relaxation matrix analysis ソフトェア番号: 1 詳細: Restrained molecular dynamics (rMD) structure refinement of B-DNA starting structures was performed using an XPLOR 3.1 (26) simulated annealing protocol employing the Cheatham, et al. (19), ...詳細: Restrained molecular dynamics (rMD) structure refinement of B-DNA starting structures was performed using an XPLOR 3.1 (26) simulated annealing protocol employing the Cheatham, et al. (19), force field. This force field was modified to include parameterization of thioG, as described above. Starting structures were energy minimized by 160 steps of Powells conjugate gradient minimization followed by rMD while heating to 600 K at 50 K sec-1, cooling to 300 K at 25 K sec-1, and equilibrating at 293 K over 250 ps. | ||||||||||||
NMRアンサンブル | コンフォーマー選択の基準: back calculated data agree with experimental NOESY spectrum 計算したコンフォーマーの数: 200 / 登録したコンフォーマーの数: 20 |