SOLUTION NMR Experimental Data


Experimental Details
Sample Conditions
Spectrometer Information
Manufacturer Model Field Strength
Varian UNITYPLUS 750 750.0
Varian 600 MHZ SPECTROMETERS 600.0
NMR Refinement
Method RELAXATION MATRIX REFINEMENT OF NOE DISTANCE RESTRAINTS AND RESTRAINED MOLECULAR DYNAMICS WITH SIMULATED ANNEALING
Details THE FOLLOWING RESTRAINTS WERE APPLIED IN THE MOLECULAR DYNAMICS/ENERGY MINIMIZATION CALCULATIONS: (1) INTER-PROTON DISTANCE RESTRAINTS DIRECTLY DERIVED FROM RELAXATION MATRIX ANALYSIS OF NOE DATA; (2) IMINO PROTON HYDROGEN BOND RESTRAINTS FOR ALL BASE PAIRS EXCEPT THE CENTRAL DA-DG MISMATCH PAIR. THE MODIFIED DA RESIDUE OF THIS MINOR CONFORMER DISPLAYED A C2'-ENDO SUGAR PUCKER AND AN ANTI GLYCOSIDIC BOND. IT FORMED AN ANTI:ANTI BASE PAIR CONTAINING TWO HYDROGEN BONDS WITH THE OPPOSITE DG. THE MODIFIED DA RESIDUE OF THE MAJOR CONFORMER OF THIS MOLECULE [YEH ET AL. (1995) BIOCHEMISTRY 34, 13570-13581] DISPLAYED C3'-ENDO SUGAR PUCKER AND A SYN GLYCOSIDIC BOND. THE MAJOR CONFORMER MODIFIED DA RESIDUE FORMED A SYN:ANTI BASE PAIR CONTAINING NON-WATSON CRICK HYDROGEN BONDS WITH THE OPPOSITE DG. MORE REFINEMENT DETAILS CAN BE FOUND IN THE PRIMARY JOURNAL CITATION (SCHWARTZ ET AL.,1997).
NMR Ensemble Information
Conformers Calculated Total Number 1
Conformers Submitted Total Number 1
Additional NMR Experimental Information
1 MINIMIZED AVERAGE STRUCTURE. THE STRUCTURE WAS DETERMINED USING DISTANCE RESTRAINTS DERIVED FROM 2D NOESY EXPERIMENTS DONE IN 99.999% D2O AND 90% H2O/ 10% D2O. 2D ROESY, TOCSY, AND EXCHANGE-ONLY EXPERIMENTS WERE USED IN THE CHEMICAL SHIFT ASSIGNMENT PROCESS.
Computation: NMR Software
# Classification Software Name Author
1 refinement version: 4.1 AMBER PEARLMAN,CASE,CALDWELL,ROSS,CHEATHAM, FERGUSON,SEIBEL,SINGH,WEINER,KOLLMAN
2 structure solution version: 2.2 MORASS --
3 structure solution version: 4.1 AMBER --