SOLUTION NMR Experimental Data


Experimental Details
Sample Conditions
Sample Contents90% WATER/10% D2O
Solventn/a
Ionic Strength0.250 M
pH6.5
Pressure1
Temperature (K)303
Experiment(s):HNCA
Spectrometer Information
Manufacturer Model Field Strength
n/a n/a 800.0
n/a n/a 600.0
VARIAN UNITY INOVA 500.0
NMR Refinement
Method SIMULATED ANNEALING
Details THE STRUCTURE WAS DETERMINED USING 1104 DISTANCE RESTRAINTS, 42 DIHEDRAL ANGLE RESTRAINTS AND 14 HYDROGEN BOND RESTRAINTS. 50 STRUCTURES WERE CALCULATED AND REFINED USING AN AB INITIO SIMULATED ANNEALING PROTOCOL FOR X- PLOR AND THEN REFINED IN TWO STEPS. AN R-6 AVERAGING PROTOCOL WAS USED FOR NON-STEREOSPECIFICALLY ASSIGNED PROTONS [1]. DURING THE SIMULATED ANNEALING STEP AND THE FIRST REFINEMENT STEP ONLY THE REPULSIVE PART OF THE VAN DER WAALS INTERACTION WAS INCLUDED. IN THE SECOND REFINEMENT STEP THE VAN DER WAALS INTERACTION WAS PARAMETERIZED USING A LENNARD-JONES POTENTIAL INCLUDING THE ATTRACTIVE PART. 21 STRUCTURES WERE SELECTED ON THE BASIS OF CUMULATIVE RMSD VALUES OF STRUCTURES, ORDERED AFTER OVERALL ENERGY, AND RAMACHANDRAN BEHAVIOR FOR REGIONS WITH LOW RESTRAINT DENSITIES. [1] BRUNGER, A. T., CLORE, G. M., GRONENBORN, A. M. & KARPLUS, M. (1986). THREE-DIMENSIONAL STRUCTURE OF PROTEINS DETERMINED BY MOLECULAR DYNAMICS WITH INTERPROTON DISTANCE RESTRAINTS: APPLICATION TO CRAMBIN. PROC NATL ACAD SCI USA 83, 3801-3805. OTHER DETAILS OF STRUCTURE REFINEMENT CAN BE FOUND IN THE JRNL CITATION.
NMR Ensemble Information
Conformer Selection Criteria CUMULATIVE RMSD OF STRUCTURES SORTED AFTER TOTAL ENERGY
Conformers Calculated Total Number 21
Conformers Submitted Total Number 1
Representative Model Choice Rationale
1 n/a
Additional NMR Experimental Information
1 MINIMIZED AVERAGE STRUCTURE.
Computation: NMR Software
# Classification Software Name Author
1 structure solution PROCHECK-NMR n/a
2 structure solution MOLMOL (VERSION 2.6) n/a
3 structure solution X-PLOR (VERSION 3.851) n/a
4 structure solution PRONTO (VERSION 970523) n/a
5 structure solution VNMR 5.3 n/a
6 refinement M IDEAL GEOMETRY BONDS 0.0045 A 0.0041 A ANGLES 0.71 DEG 0.66 DEG IMPROPERS 0.54 DEG 0.49 DEG DEG 0.49 DEG BRUNGER STRUCTURAL STATISTICS: 21 SA STRUCTURES SAAVEMIN[A] RMS DEVIATIONS FROM EXP. RESTRAINTS NOE DISTANCE RESTRAINTS (1104) 0.036 A 0.032 A DIHEDRAL ANGLE RESTRAINTS (42) 0.380 DEG 0.380 DEG DEVIATIONS FRO