SOLUTION STRUCTURE OF PCP, A PROTOTYPE FOR THE PEPTIDYL CARRIER DOMAINS OF MODULAR PEPTIDE SYNTHETASES
SOLUTION NMR
NMR Experiment | ||||||||
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Experiment | Type | Sample Contents | Solvent | Ionic Strength | pH | Pressure | Temperature (K) | Spectrometer |
1 | 2D NOESY | 1.8 mM PCP; 50 mM Na-phosphate buffer pH 5.05 | 90% H2O/10% D2O | 50 mM Na-Phosphate | 5.05 | ambient | 300 | |
2 | 2D NOESY | 1.8 mM PCP; 50 mM Na-phosphate buffer pH 5.05 | 100% D2O | 50 mM Na-Phosphate | 5.05 | ambient | 300 | |
3 | 3D_15N-separated_NOESY | 1.8 mM PCP U-15N; 50 mM Na-phosphate buffer pH 5.05 | 90% H2O/10% D2O | 50 mM Na-Phosphate | 5.05 | ambient | 300 | |
4 | 3D_13C-separated_NOESY | 1.8 mM PCP U-15N,13C; 50 mM Na-phosphate buffer pH 5.05 | 100% D2O | 50 mM Na-Phosphate | 5.05 | ambient | 300 | |
5 | HNHA | 1.8 mM PCP U-15N; 50 mM Na-phosphate buffer pH 5.05 | 90% H2O/10% D2O | 50 mM Na-Phosphate | 5.05 | ambient | 300 |
NMR Spectrometer Information | |||
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Spectrometer | Manufacturer | Model | Field Strength |
1 | Bruker | AMX | 500 |
2 | Bruker | DRX | 500 |
3 | Bruker | DRX | 600 |
4 | Bruker | DMX | 750 |
NMR Refinement | ||
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Method | Details | Software |
simulated annealing | USED DISTANCE CONSTRAINTS: 856; intra-residue: 47; sequential: 287; medium range (2<|i-j|<5): 215; long range (|i-j|>4): 253; hydrogen bonds (2 restraints per H-bond): 54;DIHEDRAL ANGLE CONSTRAINTS: 104 | CC-NMR |
NMR Ensemble Information | |
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Conformer Selection Criteria | structures with the lowest energy |
Conformers Calculated Total Number | 100 |
Conformers Submitted Total Number | 21 |
Representative Model | 1 (minimized average structure) |
Additional NMR Experimental Information | |
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Details | All spectrometers were equipped with triple resonance (1H, 13C, 15N) probeheads and pulsed-field gradient accessories. The structure was determined using triple-resonance NMR techniques. BEST REPRESENTATIVE CONFORMER 1 IN THIS ENSEMBLE is the minimized mean structure of the remaining 20 conformers. |
Computation: NMR Software | ||||
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# | Classification | Version | Software Name | Author |
1 | refinement | CC-NMR | Cieslar | |
2 | structure solution | X-PLOR | 3.1 | Brunger |