#1: ジャーナル: Eur.J.Biochem. / 年: 1990 タイトル: Secondary and tertiary structure characteristics of Megasphaera elsdenii flavodoxin in the reduced state as determined by two-dimensional 1H NMR 著者: van Mierlo, C.P.M. / Mueller, F. / Vervoort, J.
#2: ジャーナル: Eur.J.Biochem. / 年: 1990 タイトル: A two-dimensional 1H NMR study on Megasphaera elsdenii flavodoxin in the reduced state: sequential assignments 著者: van Mierlo, C.P.M. / Vervoort, J. / Mueller, F. / Bacher, A.
Text: NOESY spectra had mixing times 50, 100, 150 and 200 ms. Double Quantum spectra had a delay of 32 ms. Homonuclear Hartmann Hahn transfer spectra (using MLEV-17 composite pulse cycling) had mixing times 10-160 ms
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試料調製
詳細
Solution-ID
内容
溶媒系
1
6-10 mM protein, potassium phosphate/potassium pyrophosphate 75-200 mM, pH 8.3, 90% H2O, 10% D2O
90% H2O/10% D2O
2
6-10 mM protein, potassium phosphate/potassium pyrophosphate 75-200 mM, pH 8.3, 99.9% D2O
99.9% D2O
試料状態
Conditions-ID
pH
温度 (K)
1
8.3
303K
2
8.3
306K
3
8.3
310K
4
8.3
314K
5
8.3
316K
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NMR測定
放射
プロトコル: SINGLE WAVELENGTH / 単色(M)・ラウエ(L): M
放射波長
相対比: 1
NMRスペクトロメーター
タイプ
製造業者
モデル
磁場強度 (MHz)
Spectrometer-ID
Bruker WM
Bruker
WM
500
1
Bruker AM
Bruker
AM
500
2
Bruker AM
Bruker
AM
600
3
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解析
NMR software
名称
開発者
分類
DISNMR
Bruker
collection
GROMOS
vanGunsterenandBerendsen
構造決定
GROMOS
vanGunsterenandBerendsen
精密化
精密化
手法: restrained molecular dynamics / ソフトェア番号: 1 詳細: The Xray structure of the semiquinone state of Clostridium MP flavodoxin was used as a starting structure for restrained molecular dynamics (RMD) calculations in vacuo (van Mierlo et al. Eur. ...詳細: The Xray structure of the semiquinone state of Clostridium MP flavodoxin was used as a starting structure for restrained molecular dynamics (RMD) calculations in vacuo (van Mierlo et al. Eur. J. Biochem. 194, 185 - 198 (1990)). 509 distance restraints, 293 medium, 216 long-range were used in refinement. One repulsive restraint, between N5H of FMN and NH of E60 was included. RMD run was of 120 ps. During the first 50 ps the force constant was gradually increased to a high value of 4000 kJmol-1nm-2. From 50 ps on, the force constant was kept constant. The time span of 60-120 ps, at a time resolution of 0.02 ps, was used for calculating the average structure. The time-averaged (not energy minimised) structure has a potential energy -2278 +/- 122 kJmol-1, time-averaged sum of all violations is 2.27 nm, largest occuring violation is 66 pm
代表構造
選択基準: averaging the restrained molecular dynamics trajectory in the range 60-120 ps.