手法: 溶液NMR 詳細: NMR solution structure of the cytotoxic cyclotide cycloviolacin O2 isolated from Viola odorata. This peptide is naturally head-to-tail cyclic, i.e. has a peptide bond between the N- and C-termini.
NMR実験
Conditions-ID
Experiment-ID
Solution-ID
タイプ
1
1
1
2D 1H-1H TOCSY
1
2
1
2D DQF-COSY
1
3
1
2D 1H-1H NOESY
1
4
2
2D 1H-1H TOCSY
1
5
2
2D 1H-1H NOESY
1
6
1
2D 1H-1H TOCSY
1
7
1
2D 1H-1H NOESY
-
試料調製
詳細
Solution-ID
内容
溶媒系
1
1-2 mM cycloviolacin O2, 90% H2O/10% D2O
90% H2O/10% D2O
2
1-2 mM cycloviolacin O2, 100% D2O
100% D2O
試料
単位
構成要素
Conc. range (mg/ml)
Solution-ID
mM
cycloviolacin O2-1
1-2
1
mM
cycloviolacin O2-2
1-2
2
試料状態
pH: 6.1 / 圧: ambient / 温度: 303 K
-
NMR測定
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
Varian INOVA
Varian
INOVA
500
1
Varian Avance
Varian
AVANCE
500
2
-
解析
NMR software
名称
バージョン
開発者
分類
VNMR
6.1
Varian
collection
VNMR
6.1
Varian
解析
CARA
KellerandWuthrich
データ解析
CARA
KellerandWuthrich
chemicalshiftassignment
CYANA
2
Guntert, MumenthalerandWuthrich
構造決定
CNS
1.2
Brunger, Adams, Clore, Gros, NilgesandRead
精密化
精密化
手法: simulated annealing / ソフトェア番号: 1 詳細: Structures were calculated using torsion angle dynamics within CNS and subsequently refined and energy minimised using cartesian dynamics in explicit water.
NMR constraints
NOE constraints total: 155 / NOE intraresidue total count: 0 / NOE long range total count: 38 / NOE medium range total count: 31 / NOE sequential total count: 86 / Hydrogen bond constraints total count: 32 / Protein chi angle constraints total count: 9 / Protein other angle constraints total count: 0 / Protein phi angle constraints total count: 14 / Protein psi angle constraints total count: 0
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: 50 / 登録したコンフォーマーの数: 20 / Maximum upper distance constraint violation: 0.273 Å