SOLUTION NMR Experimental Data

Experimental Details
Sample Conditions
Sample Contents3.06MM GRAMICIDIN A
Solventn/a
Ionic Strengthn/a
pH4.0
PressureAMBIENT
Temperature (K)328
Experiment(s):2D NOESY
Spectrometer Information
Manufacturer Model Field Strength
Varian VXRS 500.0
NMR Refinement
Method DISTANCE GEOMETRY, SIMULATED ANNEALING, RELAXATION MATRIX CALCULATION, MINIMIZATION
Details THE STRUCTURE WAS MODELED USING 705 DISTANCE CONSTRAINTS AND 13 HYDROGEN BOND CONSTRAINTS PER MONOMER, INCLUDING CONSTRAINTS BETWEEN THE MONOMERS. THE C2 SYMMETRY CONSTRAINT DOUBLES THIS NUMBER OF CONSTRAINTS FOR THE DIMER. 100 STRUCTURES WERE GENERATED USING DSPACE, OF WHICH THE 10 WITH THE FEWEST VIOLATIONS FROM THE DISTANCE CONSTRAINTS WERE CHOSEN FOR THE AVERAGE STRUCTURE. THIS AVERAGE STRUCTURE WAS FURTHER REFINED BY CONSTRAINED MINIMIZATION WITH DISCOVER USING THE ALL-ATOM AMBER FORCE FIELD AND A DIELECTRIC CONSTANT OF 2.0 TO EMULATE THAT OF THE MICELLE INTERIOR.
NMR Ensemble Information
Conformers Submitted Total Number 1
Representative Model Choice Rationale
1 minimized average structure
Additional NMR Experimental Information
1 A 65MSEC MIXING TIME WAS USED IN THE NOESY EXPERIMENT FROM WHICH DISTANCE CONSTRAINTS WERE OBTAINED.
Computation: NMR Software
# Classification Software Name Author
1 refinement DISCOVER 97.2 BIOSYM/MSI
2 structure solution VNMR 3.2 --
3 structure solution FELIX 95.0 --
4 structure solution DSPACE 4.0 --