At pH 7.5, theoretically, both dihydrogen phosphate and hydrogen phosphate ions are present with a ...At pH 7.5, theoretically, both dihydrogen phosphate and hydrogen phosphate ions are present with a ratio around 1:2. In the crystal structure of F95H EIZS, the dihydrogen phosphate /hydrogen phosphate ion is surrounded and stabilized by three Arginine side chains, one Histidine side chain, one glycerol and two water molecules. The contacts involving hydrogen bonding interaction and salt bridge interaction between each oxygen of dihydrogen phosphate /hydrogen phosphate ion and surrounding molecules indicates that hydrogen phosphate ion would be a reasonable fit in such electropositive environment.
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実験情報
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実験
実験
手法: X線回折 / 使用した結晶の数: 1
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試料調製
結晶
マシュー密度: 2.17 Å3/Da / 溶媒含有率: 43.41 %
結晶化
温度: 298 K / 手法: 蒸気拡散法, シッティングドロップ法 / pH: 7.5 詳細: A 0.6 uL drop of protein solution [10 mg/mL F95H EIZS, 20 mM Tris-HCl (pH 7.5), 300 mM NaCl, 10 mM MgCl2, 10% glycerol, 2 mM TCEP, 2 mM sodium pyrophosphate, 2 mM BTAC] was added to 0.6 uL of ...詳細: A 0.6 uL drop of protein solution [10 mg/mL F95H EIZS, 20 mM Tris-HCl (pH 7.5), 300 mM NaCl, 10 mM MgCl2, 10% glycerol, 2 mM TCEP, 2 mM sodium pyrophosphate, 2 mM BTAC] was added to 0.6 uL of precipitant solution [40 mM KH2PO4, 16% polyethylene glycol 8000, and 20% glycerol] and equilibrated against a 110 uL well reservoir of precipitant solution., VAPOR DIFFUSION, SITTING DROP, temperature 298K
タイプ: ADSC QUANTUM 315 / 検出器: CCD / 日付: 2013年2月2日 詳細: Monochromator: Double silicon (111) crystal monochromator with cryogenically-cooled first crystal and sagittally-bent second crystal horizontally-focusing at 3.3:1 demagnification. Mirror: ...詳細: Monochromator: Double silicon (111) crystal monochromator with cryogenically-cooled first crystal and sagittally-bent second crystal horizontally-focusing at 3.3:1 demagnification. Mirror: Meridionally-bent fused silica mirror with palladium and uncoated stripes vertically focusing at 6.6:1 demagnification.
放射
モノクロメーター: Double silicon (111) crystal monochromator with cryogenically-cooled first crystal and sagittally-bent second crystal horizontally-focusing at 3.3:1 demagnification. プロトコル: SINGLE WAVELENGTH / 単色(M)・ラウエ(L): M / 散乱光タイプ: x-ray