1AXH

SOLUTION NMR

NMR Spectrometer Information
Spectrometer	Manufacturer	Model	Field Strength
1	Bruker	AMX600	600

NMR Refinement
Method	Details	Software
DISTANCE GEOMETRY AND DYNAMICAL SIMULATED ANNEALING	INITIAL STRUCTURES (5000) WERE CALCULATED USING THE DISTANCE GEOMETRY PROGRAMME DIANA, USING A SINGLE CYCLE OF REDUNDANT DIHEDRAL ANGLE RESTRAINTS [GUNTERT, P. AND WUTHRICH, K. (1991) J. BIOMOL. NMR 1, 447-456]. THE 100 STRUCTURES WITH LOWEST RESIDUAL RESTRAINT VIOLATIONS WERE THEN REFINED USING DYNAMICAL SIMULATED ANNEALING [NILGES, M. CLORE, G.M. AND GRONENBORN, A.M. (1988) FEBS LETT. 229, 317-324] IN X-PLOR. STRUCTURES WERE CALCULATED USING 419 NON-REDUNDANT INTERPROTON DISTANCE RESTRAINTS, 43 DIHEDRAL-ANGLE RESTRAINTS (27 PHI, 16 CHI1), AND 28 RESTRAINTS DEFINING 14 HYDROGEN BONDS, GIVING AN AVERAGE OF 13.2 RESTRAINTS/RESIDUE. THE ATOMIC RMS DIFFERENCES FOR RESIDUES 4 - 37 OF THE FINAL FAMILY OF 20 CONFORMERS WITH RESPECT TO THE MEAN COORDINATE POSITIONS ARE 0.22 /- 0.06 AND 0.62 +/- 0.08 ANGSTROMS FOR THE BACKBONE AND HEAVY ATOMS, RESPECTIVELY. THE CORRESPONDING PAIRWISE RMS DIFFERENCES ARE 0.31 +/- 0.07 AND 0.90 +/- 0.12 ANGSTROMS. RESIDUES 1 - 3 ARE DISORDERED. THE DEPOSITED STRUCTURES HAVE BEEN SUPERIMPOSED FOR MINIMUM RMSD OVER THE HEAVY ATOMS OF THE MEAN COORDINATE STRUCTURE. THE FIRST STRUCTURE IS THAT WITH THE LOWEST OVERALL ENERGY IN THE SIMPLIFIED ALL-HYDROGEN CHARMM FORCE FIELD AS IMPLEMENTED IN X-PLOR.	X-PLOR

NMR Ensemble Information
Conformer Selection Criteria	LOWEST RESIDUAL RESTRAINT VIOLATIONS
Conformers Calculated Total Number	100
Conformers Submitted Total Number	20