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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.
XwinNMR
NMR Ensemble Information
Conformer Selection Criteria
structures with the lowest energy
Conformers Calculated Total Number
100
Conformers Submitted Total Number
20
Representative Model
1 (closest to the average)
Additional NMR Experimental Information
Details
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.