1I25
Three dimensional solution structure of huwentoxin-II by 2D 1H-NMR
SOLUTION NMR
NMR Experiment | ||||||||
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Experiment | Type | Sample Contents | Solvent | Ionic Strength | pH | Pressure | Temperature (K) | Spectrometer |
1 | NOESY | 4 mM Huwentoxin-II; 20 mmol/l phosphate buffer; 90%H2O , 10%D2O | 90% H2O/10% D2O | 20 | 5.4 | 1 atm | 300 | |
2 | DQF-COSY | 4 mM Huwentoxin-II; 20 mmol/l phosphate buffer; 90%H2O , 10%D2O | 90% H2O/10% D2O | 20 | 5.4 | 1 atm | 300 | |
3 | TOCSY | 4 mM Huwentoxin-II; 20 mmol/l phosphate buffer; 90%H2O , 10%D2O | 90% H2O/10% D2O | 20 | 5.4 | 1 atm | 300 | |
4 | NOESY | 4 mM Huwentoxin-II; 20 mmol/l phosphate buffer; 100%D2O | 100% D2O | 20 | 5.4 | 1 atm | 300 | |
5 | E-COSY | 4 mM Huwentoxin-II; 20 mmol/l phosphate buffer; 100%D2O | 100% D2O | 20 | 5.4 | 1 atm | 300 | |
6 | TOCSY | 4 mM Huwentoxin-II; 20 mmol/l phosphate buffer; 100%D2O | 100% D2O | 20 | 5.4 | 1 atm | 300 | |
7 | NOESY | 4 mM Huwentoxin-II; 20 mmol/l phosphate buffer; 90%H2O , 10%D2O | 90% H2O/10% D2O | 5.4 | 1 atm | 290 | ||
8 | TOCSY | 4 mM Huwentoxin-II; 20 mmol/l phosphate buffer; 90%H2O , 10%D2O | 90% H2O/10% D2O | 5.4 | 1 atm | 290 |
NMR Spectrometer Information | |||
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Spectrometer | Manufacturer | Model | Field Strength |
1 | Bruker | DMX | 500 |
NMR Refinement | ||
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Method | Details | Software |
simulated annealing | The structures are based on 592 NOE-derived distance constraints, 16 dihedral angel restraints and 9 fake distance restraints from disulfide bonds. | FELIX |
NMR Ensemble Information | |
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Conformer Selection Criteria | structures with the lowest energy |
Conformers Calculated Total Number | 50 |
Conformers Submitted Total Number | 10 |
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 | data analysis | FELIX | 98.0 | Molecular Simulations, Inc. |
2 | refinement | X-PLOR | 3.851 | Brunger |