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THE STRUCTURES ARE BASED ON 823 INTERPROTON DISTANCE
RESTRAINTS FROM NOE MEASUREMENTS; 98 HYDROGEN-BONDING
DISTANCE RESTRAINTS FOR 49 HYDROGEN-BONDS IDENTIFIED ON
THE BASIS OF THE NOE AND AMIDE PROTON EXCHANGE DATA, AS
WELL AS THE INITIAL STRUCTURE CALCULATIONS; AND 101 PHI
AND 82 PSI BACKBONE TORSION ANGLE RESTRAINTS DERIVED FROM
COUPLING CONSTANTS, NOE DATA, AND 13C SECONDARY CHEMICAL
SHIFTS.
THE METHOD USED TO DETERMINE THE STRUCTURES IS THE HYBRID
METRIC MATRIX DISTANCE GEOMETRY-DYNAMICAL SIMULATED
ANNEALING METHOD (M. NILGES, G. M. CLORE, AND A. M.
GRONENBORN FEBS LETT. 229, 317-324 (1988)).
DETAILS OF THE STRUCTURE DETERMINATION AND ALL STRUCTURAL
STATISTICS ARE GIVEN IN REFERENCE 1 (I.E. AGREEMENT WITH
EXPERIMENTAL RESTRAINTS, DEVIATIONS FROM IDEALITY FOR BOND
LENGTHS, ANGLES, PLANES AND CHIRALITY, NON-BONDED CONTACTS,
ATOMIC RMS DIFFERENCES BETWEEN THE CALCULATED STRUCTURES.
RESIDUES 1 - 6 AND 132 - 133 AT THE N- AND C-TERMINI ARE
DISORDERED.
THE RESTRAINED MINIMIZED AVERAGE STRUCTURE IS PRESENTED IN
THIS ENTRY. THIS WAS OBTAINED BY AVERAGING THE COORDINATES
OF THE INDIVIDUAL STRUCTURES AND SUBJECTING THE RESULTING
COORDINATES TO RESTRAINED MINIMIZATION. MODELS 1 - 22,
PRESENTED IN PROTEIN DATA BANK ENTRY 1BCN, REPRESENT THE
INDIVIDUAL MODELS.
THE (SA)R RESTRAINED MINIMIZED MEAN STRUCTURE WAS DERIVED
BY AVERAGING THE COORDINATES OF THE INDIVIDUAL SA
STRUCTURES (BEST FITTED TO RESIDUES 7 - 131), AND
SUBJECTING THE RESULTING COORDINATES TO RESTRAINED
MINIMIZATION. THE QUANTITY PRESENTED IN COLUMNS 61 - 66 IN
THIS ENTRY REPRESENTS THE ATOMIC RMS DEVIATIONS OF THE 22
INDIVIDUAL SA STRUCTURES ABOUT THE MEAN STRUCTURE. |
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