Find PDB structures and Computed Structure Models (CSM) by combining queries from tools in this suite: Attribute Search, Sequence Similarity, Sequence Motif, 3D Similarity, and 3D Motif with 'AND' logic.
Solution structure of a 2:1C2-(2-naphthyl)pyrrolo[2,1-c][1,4]benzodiazepine (PBD) DNA adduct: molecular basis for unexpectedly high DNA helix stabilization.
SOLUTION NMR
NMR Experiment
Experiment
Type
Sample Contents
Solvent
Ionic Strength
pH
Pressure
Temperature (K)
Spectrometer
1
2D 1H-1H TOCSY
0.68 mM DNA (5'-D(*(DA)P*(DA)P*(DT)P*(DC)P*(DT)P*(DT)P*(DT)P*(DA)P*(DA)P*(DA)P*(DG)P*(DA)P*(DT)P*(DT))-3')
90% H2O/10% D2O
130
6.85
ambient
298
2
2D 1H-1H COSY
0.68 mM DNA (5'-D(*(DA)P*(DA)P*(DT)P*(DC)P*(DT)P*(DT)P*(DT)P*(DA)P*(DA)P*(DA)P*(DG)P*(DA)P*(DT)P*(DT))-3')
90% H2O/10% D2O
130
6.85
ambient
298
3
2D 1H-1H NOESY
0.68 mM DNA (5'-D(*(DA)P*(DA)P*(DT)P*(DC)P*(DT)P*(DT)P*(DT)P*(DA)P*(DA)P*(DA)P*(DG)P*(DA)P*(DT)P*(DT))-3')
90% H2O/10% D2O
130
6.85
ambient
298
NMR Spectrometer Information
Spectrometer
Manufacturer
Model
Field Strength
1
Bruker
AVANCE
500
NMR Refinement
Method
Details
Software
simulated annealing
DISTANCES RESTRAINTS WERE CALCULATED FROM THREE-DIMENSIONAL NOESY PEAK VOLUMES BY COMPARING TO REFERENCE VOLUME OF CYTOSINE (2.45 A BETWEEN H5 AND H6). ALL DISTANCE CONSTRAINTS WERE CLASSIFIED ACCORDING TO CROSSPEAK INTENSITIES AS (S) STRONG (1.80 TO 2.90), (M) MEDIUM (1.80 TO 4.00) AND (W) WEAK (D = 4.0, -2.2/+1.0 ). DISTANCE CONSTRAINS WITH METHYL PROTONS WERE CONSIDERED SEPARATELY (D = 4.0 , -2.2/+1.5 ). THE SIMULATED ANNEALING APPROACH WAS USED TO GENERATE 200 STRUCTURES. THE 10 LOWEST ENERGY STRUCTURES WERE CHOSEN AND THE ROOT MEAN SQUARE DEVIATION VALUES CALCULATED.