SOLID-STATE NMR

NMR Experiment
Experiment Type Sample Contents Ionic Strength Solvent pH Pressure Temprature (K)
1 PISEMA 5-15 mM [U-15N] entity-1, 5-15 mM [U-15N]-Leu entity-2, 5-15 mM [U-15N]-Ile entity-3, 5-15 mM [U-15N]-Val entity-4, 5-15 mM [U-15N]-Phe entity-5, 100% H2O 10 100% H2O 7.5 ambient 303
2 PISEMA 5-15 mM [U-15N] entity-1, 5-15 mM [U-15N]-Leu entity-2, 5-15 mM [U-15N]-Ile entity-3, 5-15 mM [U-15N]-Val entity-4, 5-15 mM [U-15N]-Phe entity-5, 100% H2O 10 100% H2O 7.5 ambient 303
NMR Spectrometer Information
Spectrometer Manufacturer Model Field Strength
NMR Refinement
Method Details Software
simulated annealing and molecular dynamics, molecular dynamics Monomer structure was calculated using solid state NMR constraints by simulated annealing. A preliminary model for tetramer was assembled placing four copies of monomer consistent with NMR derived tilt angles and rotation. The model was annealed again by incorporating distance and orientational restraints.The tetramer model was placed in explicit hydrated lipid bilayer and tetramer model was refined with solid state NMR orientational restraints using NAMD. Finally, The His37-Trp41 geometry was optimized using QM/MM calculations keeping backbone fixed. Note the His-His geometry is consistent with the experimental NMR observation. 1
NMR Ensemble Information
Conformer Selection Criteria structures with the least restraint violations
Conformers Calculated Total Number 8
Conformers Submitted Total Number 8
Representative Model 1 (fewest violations)
Computation: NMR Software
# Classification Version Software Name Author
1 refinement 2.23 X-PLOR NIH Schwieters, Kuszewski, Tjandra and Clore
2 structure solution 2.23 X-PLOR NIH Schwieters, Kuszewski, Tjandra and Clore
3 collection 3.6 XwinNMR Bruker Biospin
4 refinement 2.7b NAMD Phillips,Braun,Wang,Gumbart ,Tajkhorshid , Villa ,Chipot ,Skeel, Kale , Schulten
5 chemical shift assignment ? PIPATH Asbury, Quine,Achuthan, Hu, Chapman, Bertram, Cross