| simulated annealing |
30 CONFORMERS WERE DETERMINED BY RESTRAINED MOLECULAR DYNAMICS/SIMULATED ANNEALING METHOD USING THE PROGRAM X-PLOR 3.84. THE STRUCTURES ARE BASED ON 1908 INTERPROTON DISTANCE RESTRAINTS DERIVED FROM NOE MEASUREMENTS; 88 HYDROGEN-BONDING DISTANCE RESTRAINTS FOR 44 HYDROGEN-BONDS IDENTIFIED ON THE BASIS OF THE NOE AND AMIDE PROTON EXCHANGE DATA; 25 TORSION ANGLE RESTRAINTS DERIVED FROM COUPLING CONSTANTS AND NOE DATA. THE RMS DISTRIBUTION ABOUT THE MEAN COORDINATE POSITIONS IS 0.57 ANGSTROMS FOR ALL BACKBONE ATOMS AND 1.12 ANGSTROMS FOR ALL ATOMS. THE AVERAGE STRUCTURE WAS THEN CALCULATED BY BEST FIT SUPERPOSITION, COORDINATE AVERAGING AND RESTRAINED ENERGY MINIMIZATION. |
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