SOLUTION NMR Experimental Data


Experimental Details
Sample Conditions
Sample Contents2mM Lac-HP62-V52C U-15N,13C, 10mM KPi, 20mM KCl, 90% H2O, 10% D2O
Solvent90% H2O, 10% D2O
Ionic Strength10mM KPi, 20mM KCl
pH6.0
Pressureambient
Temperature (K)315
Experiment(s):3D_13C-separated_NOESY, 3D_15N-separated_NOESY, 2D NOESY
Spectrometer Information
Manufacturer Model Field Strength
Bruker DRX 600.0
Bruker DRX 750.0
NMR Refinement
Method SIMULATED ANNEALING FOLLOWED BY RESTRAINED MDR
Details The structure of the complex was calculated as follows. First the structure of the dimeric lac HP62-V52C was calculated using only protein NMR restraints. The 50 best structures were selected and docked onto the natural lac operator B-DNA using simulated annealing. Distance and planarity restraints for the DNA were incorporated in order to keep DNA close to B-DNA but allowing a bend necessary to accommodate the two headpiece molecules on the DNA.
NMR Ensemble Information
Conformer Selection Criteria STRUCTURES WITH THE LOWEST ENERGY
Conformers Calculated Total Number 100
Conformers Submitted Total Number 20
Representative Model Choice Rationale
1 closest to the average
Additional NMR Experimental Information
1 This structure was determined using standard 2D and 3D homo- and heteronuclearnuclear techniques. 13C-15N labeled protein was used and unlabeled nucleotide. IN ADDITION ISOTOPE FILTER EXPERIMENTS WERE APPLIED TO OBTAIN ADDITIONAL ASSIGNMENTS AND TO ASSIGN INTER-MOLECULAR NOES. FOR FURTHER DETAILS SEE THE REFERENCE DESCRIBING THE STRUCTURES.
Computation: NMR Software
# Classification Software Name Author
1 refinement CNS 1.1 Brunger
2 structure solution CNS 1.1 Brunger
3 data analysis NMRView 5.0.4 Johnson
4 processing NMRPipe 1.0 Delaglio
5 collection XWINNMR 3.1 Bruker