| MOLECULAR DYNAMICS, ENERGY MINIMIZATION |
ALL COORDINATES AROSE FROM ENERGY MINIMIZED AMBER4 FILES THAT WERE REFORMATTED FOR THE HELIX ANALYSIS PROGRAM CURVES. THEREFORE, ALL HYDROGEN ATOMS WERE REMOVED. THE DEPOSITORS HAVE PROVIDED THREE COORDINATE SETS FOR THIS
STRUCTURE. THE FIRST TWO COORDINATE SETS (PROTEIN DATA
BANK ENTRIES 140D AND 141D) CONTAIN THE RESULTS OF THE
NMR/RESTRAINED MOLECULAR DYNAMICS REFINEMENT WHERE A-DNA
AND B-DNA WERE USED AS STARTING MODELS, RESPECTIVELY. THE
AUTHORS DENOTED THESE STRUCTURES AS RMD-A AND RMD-B,
RESPECTIVELY. THE THIRD COORDINATE SET (PROTEIN DATA BANK
ENTRY 142D) REPRESENTS THE FINAL STRUCTURE, DENOTED
RMD-FINAL BY THE AUTHORS. ALL STRUCTURES WERE DERIVED BY
AVERAGING THE LAST 4 PS OF 30 PS RESTRAINED MD (AMBER4) AND
SUBSEQUENT RESTRAINED ENERGY MINIMIZATION. FIVE RMD RUNS
WERE AVERAGED TO EACH INTERIM STRUCTURE RMD-A AND RMD-B,
DEPENDING ON THE STARTING GEOMETRY. ALL TEN STRUCTURES
WERE AVERAGED, RESTRAINED ENERGY MINIMIZED AND A FINAL 20PS
RMD RUN WAS PERFORMED, THE LAST 4PS OF WHICH, AFTER
AVERAGING AND RESTRAINED ENERGY MINIMIZATION LEAD TO THE FINAL STRUCTURE: RMD-FINAL. |
1 |
