SOLUTION NMR Experimental Data

Experimental Details
Sample Conditions
Sample Contents1R-trans-anti-BPh (carcinogen) covalently bound to 11mer DNA duplex
Solventaqueous solution
Ionic Strength0.10
Temperature (K)277
Experiment(s):2D NOESY, P-COSY, 1H-31P HSQC
Spectrometer Information
Manufacturer Model Field Strength
Varian INOVA 500.0
Varian INOVA 400.0
Varian INOVA 600.0
NMR Refinement
Method torsion angle dynamics, simulated annealing, relaxation matrix refinements, energe minimization
Details Nonexchangeable interproton distance restraints were obtained from the buildup of NOE cross peak volumes in NOESY data sets (55, 100, 150 and 200 ms mixing times) on the 1S-(-)-trans-anti-(BPh)G*C and the 1R-(+)-trans-anti-(BPh)G*C 11-mer DNA duplex adducts in D2O buffer at 23 and 18 sC, respectively, and bounds were set between 15% and 25% of the calculated distances using the fixed cytidine H5-H6 reference distance of 2.45 . Non-stereospecific assignments were treated with r-6 averaging. Interproton distance restraints involving exchangeable protons of the same complex were obtained from NOESY spectra (90 and 150 ms mixing times) in H2O buffer at 4 sC with bounds set between 20% and 25% of the calculated distance using the thymine imino to adenine H2 reference distance of 2.91 across an A*T base pair.
NMR Ensemble Information
Conformer Selection Criteria structures with the lowest energy
Conformers Calculated Total Number 9
Conformers Submitted Total Number 9
Representative Model Choice Rationale
1 fewest violations
Additional NMR Experimental Information
1 D2O NMR experiments were performed at 13 degree C, H2O NMR experiments were performed at 4 degree C
Computation: NMR Software
# Classification Software Name Author
1 processing version: 6.1 VNMR Varian Associates Inc.
2 data analysis version: felix2000 FELIX MSI
3 refinement version: 3.1 X-PLOR Brunger, A. T.