1TTK
NMR solution structure of omega-conotoxin MVIIA, a N-type calcium channel blocker
SOLUTION NMR
NMR Experiment | ||||||||
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Experiment | Type | Sample Contents | Solvent | Ionic Strength | pH | Pressure | Temperature (K) | Spectrometer |
1 | 2D NOESY | 2mM MVIIA, 95% H2O, D2O, DSS | 95% H2O/5% D2O | 3.5 | ambient | 293 | ||
2 | 2D TOCSY | 2mM MVIIA, 95% H2O, D2O, DSS | 95% H2O/5% D2O | 3.5 | ambient | 293 | ||
3 | DQF-COSY | 2mM MVIIA, 95% H2O, D2O, DSS | 95% H2O/5% D2O | 3.5 | ambient | 293 | ||
4 | 2D NOESY | 2mM MVIIA | 100% D2O | 3.5 | ambient | 293 | ||
5 | 2D TOCSY | 2mM MVIIA | 100% D2O | 3.5 | ambient | 293 | ||
6 | E-COSY | 2mM MVIIA | 100% D2O | 3.5 | ambient | 293 |
NMR Spectrometer Information | |||
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Spectrometer | Manufacturer | Model | Field Strength |
1 | Bruker | DRX | 500 |
2 | Bruker | AMX | 750 |
NMR Refinement | ||
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Method | Details | Software |
Solution structures were calculated using torsion angle dynamics/simulated annealing techniques. | A total of 456 distance restraints (including H-bonds) and 31 dihedral distance restraints (including 22 phis and 9 chi angles) were used to calculate the structure. | XwinNMR |
NMR Ensemble Information | |
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Conformer Selection Criteria | structures with the lowest energy |
Conformers Calculated Total Number | 50 |
Conformers Submitted Total Number | 17 |
Representative Model | 11 (lowest energy) |
Additional NMR Experimental Information | |
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Details | This structure was detrmined using standard 2D homonucelar NMR techniques. |
Computation: NMR Software | ||||
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# | Classification | Version | Software Name | Author |
1 | collection | XwinNMR | 3.5 | |
2 | structure solution | X-PLOR | 3.851 | |
3 | refinement | X-PLOR | 3.851 |