Solution structure of the N-terminal membrane anchor of E. coli enzyme IIA(Glucose)
SOLUTION NMR
| NMR Experiment | ||||||||
|---|---|---|---|---|---|---|---|---|
| Experiment | Type | Sample Contents | Solvent | Ionic Strength | pH | Pressure | Temperature (K) | Spectrometer |
| 1 | 2D NOESY, TOCSY, DQF-COSY | natural abundance synthetic peptide 5 mM peptide and 50 mM dihexanoyl phosphatidylglycerol | 90% H2O and 10% D2O | no buffer | 5.4 | ambient | 298 | |
| NMR Spectrometer Information | |||
|---|---|---|---|
| Spectrometer | Manufacturer | Model | Field Strength |
| 1 | Varian | INOVA | 600 |
| NMR Refinement | ||
|---|---|---|
| Method | Details | Software |
| simulated annealing | The structures are based on 146 distances derived from the NOESY spectra. No dihedral angles or hydrogen-bond restraints were applied. | NMRPipe/nmrDraw |
| NMR Ensemble Information | |
|---|---|
| Conformer Selection Criteria | No NOE violations greater than 0.20 A; rms difference for bond deviations from ideality less than 0.01 A; rms difference for angle deviations from ideality less than 2 degrees; Structures with the lowerest energies in the ensemble; Structures most resemble the average structure. |
| Conformers Calculated Total Number | 100 |
| Conformers Submitted Total Number | 20 |
| Representative Model | 1 (most resemble the average structure.) |
| Additional NMR Experimental Information | |
|---|---|
| Details | This structure was determined using standard 2D homonuclear NMR techniques. |
| Computation: NMR Software | ||||
|---|---|---|---|---|
| # | Classification | Version | Software Name | Author |
| 1 | data processing | NMRPipe/nmrDraw | 2.1 | Delaglio, F. |
| 2 | noe picking | PIPP | 1.0 | Garrett, D. |
| 3 | structural calculations | XPLOR-NIH | 1.06 | Schwieters, C.D., Kuszewski, J., Tjandra, N, Clore, G.M. |
| 4 | structural analysis and viewing | MOLMOL | 2K.1 | Koradi, R. |
