SOLUTION NMR Experimental Data

Experimental Details
Sample Conditions
Sample Contents2.5 mM Pi4, 5 mM CD3COONa, pH 4.0, 10% D2O
Solvent90% H2O, 10% D2O
Ionic Strength5
Temperature (K)303
Experiment(s):2D NOESY, P-COSY
Sample Contents3.2 mM Pi4, 5 mM CD3COONa, pD 4.0, 100% D2O
Solvent100% D2O
Ionic Strength5
Temperature (K)303
Experiment(s):2D NOESY
Spectrometer Information
Manufacturer Model Field Strength
Varian INOVA 500.0
NMR Refinement
Method torsion angle dynamics
Details Structures are based on a total of 705 constraints, 679 are meaningful nOe derived constraints (642 unambiguous, 37 ambiguous), 16 are dihedral (phi) angle constraints and 10 are hydrogen bonds. The four disulfide bridges (CYS 6-27, 12-32, 16-34, 22-37) were included in the topology file used for the calculations.
NMR Ensemble Information
Conformer Selection Criteria structures with the lowest energy
Conformers Calculated Total Number 20
Conformers Submitted Total Number 10
Representative Model Choice Rationale
1 lowest energy
Additional NMR Experimental Information
1 Disulfide bridges were determined by NMR and by N-terminal sequencing of proteolysis peptides. Distance constraints were derived from initial nOe build up rates using 2D NOESY experiments with mixing times of 70, 100, 150, 200 and 250 ms in H2O and D2O.
Computation: NMR Software
# Classification Software Name Author
1 refinement CNS 1.1 Brunger
2 structure solution CNS 1.1 Brunger
3 structure solution ARIA 1.2 Nilges
4 data analysis NMRView 5.03 Johnson
5 collection VNMR 6.1C Varian Inc.