1JRJ
Solution structure of exendin-4 in 30-vol% trifluoroethanol
SOLUTION NMR
NMR Experiment | ||||||||
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Experiment | Type | Sample Contents | Solvent | Ionic Strength | pH | Pressure | Temperature (K) | Spectrometer |
1 | 2D NOESY | Natural abundance | 2mg/ml in pH 5.9 15mM phosphate buffer with 30 vol-% trifluoroethanol added | 15mM potassium phosphate | 5.9 | ambient | 280 | |
2 | 2D TOCSY | Natural abundance | 2mg/ml in pH 5.9 15mM phosphate buffer with 30 vol-% trifluoroethanol added | 15mM potassium phosphate | 5.9 | ambient | 280 |
NMR Spectrometer Information | |||
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Spectrometer | Manufacturer | Model | Field Strength |
1 | Bruker | DMX | 750 |
NMR Refinement | ||
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Method | Details | Software |
simulated annealing | The structures were calculated using CNS 0.9 with 294 NOE distance constraints, 20 distance constraints from defined torsion angles, and 116 anti-distance constraints. No hydrogen bond constraints were employed. | XwinNMR |
NMR Ensemble Information | |
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Conformer Selection Criteria | structures with acceptable covalent geometry, structures with favorable non-bond energy, structures with the least restraint violations |
Conformers Calculated Total Number | 50 |
Conformers Submitted Total Number | 36 |
Additional NMR Experimental Information | |
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Details | 2D NOESYs performed with mixing times of 60, 150 (deuterated medium), 160ms. |
Computation: NMR Software | ||||
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# | Classification | Version | Software Name | Author |
1 | collection | XwinNMR | Bruker | |
2 | processing | Felix | 95 | MSI |
3 | structure solution | CNS | 0.9 | Brunger |
4 | refinement | CNS | 0.9 | Brunger |