Solid State NMR Structure of the low-temperature form of the Pf1 Major Coat Protein in Magnetically Aligned Bacteriophage
SOLID-STATE NMR
| NMR Experiment | ||||||||
|---|---|---|---|---|---|---|---|---|
| Experiment | Type | Sample Contents | Solvent | Ionic Strength | pH | Pressure | Temperature (K) | Spectrometer |
| 1 | PISEMA | Approximately 50 mg/ml Pf1 bacteriophage, u-15N | 5 mM sodium borate buffer | 8 | ambient | 273 | ||
| NMR Spectrometer Information | |||
|---|---|---|---|
| Spectrometer | Manufacturer | Model | Field Strength |
| 1 | Bruker | AVANCE | 750 |
| NMR Refinement | ||
|---|---|---|
| Method | Details | Software |
| Determination of torsion angles between adjacent residues using solid-state NMR frequencies | This is a backbone only model. Constant peptide plane geometry was assumed. Torsion angles phi and psi were allowed to vary within 10-20 degrees relative to phi=-65, psi=-40. Radial and angular positioning of subunits in a manner similar to and in comparison with structure 1PJF, which involved minimization against published neutron diffraction distance constraints and energy minimization with sidechains using the program SCWRL. | NMRPipe |
| NMR Ensemble Information | |
|---|---|
| Conformer Selection Criteria | structural fitting of PISEMA spectrum with fixed peptide plane geometry |
| Conformers Calculated Total Number | 100 |
| Conformers Submitted Total Number | 27 |
| Representative Model | 1 (closest to the average) |
| Additional NMR Experimental Information | |
|---|---|
| Details | MODEL 1 IS THE BASIC SOLID-STATE NMR STRUCTURE (NO SIDECHAINS), WHILE MODELS 2-27 ARE IDENTICAL TRANSLATED AND ROTATED COPIES OF MODEL 1 INCLUDED TO PRESENT THE MODEL OF THE WHOLE BACTERIOPHAGE ASSEMBLY. |
| Computation: NMR Software | ||||
|---|---|---|---|---|
| # | Classification | Version | Software Name | Author |
| 1 | data analysis | NMRPipe | 2.2 | |
| 2 | data analysis | Felix | 2000.1 | |
| 3 | structure solution | Matlab scripts | 1.0 | Nevzorov A.A., Opella, S.J. |
| 4 | refinement | SCWRL | Bower et al. | |
