1I02
NMR STRUCTURE OF CTX A3 AT NEUTRAL PH (20 STRUCTURES)
SOLUTION NMR
NMR Experiment | ||||||||
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Experiment | Type | Sample Contents | Solvent | Ionic Strength | pH | Pressure | Temperature (K) | Spectrometer |
1 | 2D NOESY | 5mM Cardiotoxin A3; 10mM phosphate buffer | 90% H2O/10% D2O | 6.0 | 1 atm | 300 | ||
2 | 2D NOESY | 5mM Cardiotoxin A3; 10mM phosphate buffer | 90% H2O/10% D2O | 6.0 | 1 atm | 283 | ||
3 | DQF-COSY | 5mM Cardiotoxin A3; 10mM phosphate buffer | 90% H2O/10% D2O | 6.0 | 1 atm | 300 | ||
4 | DQF-COSY | 5 mM Cardiotoxin A3; 10mM phosphate buffer | 100% D2O | 6.0 | 1 atm | 300 |
NMR Spectrometer Information | |||
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Spectrometer | Manufacturer | Model | Field Strength |
1 | Bruker | AMX | 500 |
NMR Refinement | ||
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Method | Details | Software |
distance geometry and simulated annealing | The NMR structures are based on a total of 680 NOE restraints, 40 dihedral angle restraints, 19 distance restraints from hydrogen bonds and 4 disulfide bond linkages. | XwinNMR |
NMR Ensemble Information | |
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Conformer Selection Criteria | The submitted structures are the 20 structures with the lowest energy. |
Conformers Calculated Total Number | 50 |
Conformers Submitted Total Number | 20 |
Representative Model | 1 (closest to the average) |
Additional NMR Experimental Information | |
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Details | This structure was determined using standard 2D homonuclear techniques. |
Computation: NMR Software | ||||
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# | Classification | Version | Software Name | Author |
1 | collection | XwinNMR | 2.1 | |
2 | data analysis | XwinNMR | 2.1 | |
3 | structure solution | X-PLOR | 3.1 | Brunger |
4 | refinement | X-PLOR | 3.1 | Brunger |