1Q75
Solution structure of the dyskeratosis congenita mutant P2b hairpin from human telomerase RNA
SOLUTION NMR
NMR Experiment | ||||||||
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Experiment | Type | Sample Contents | Solvent | Ionic Strength | pH | Pressure | Temperature (K) | Spectrometer |
1 | 2D NOESY (1,1echo and watergate) | 1mM unlabeled RNA, 10mM sodium phosphate buffer, pH 6.3, 200mM KCl, 50uM EDTA, 0.2% sodium azide, 95% H2O,5% D2O | 95% H2O/5% D2O | 200mM KCl | 6.3 | ambient | 283 | |
2 | 2D 15N-HMQC, 2D 15N-CPMG-NOESY, 2D JNN-HNN-COSY | 1mM 13C,15N-labeled RNA, 10mM sodium phosphate buffer, pH 6.3, 200mM KCl, 50uM EDTA, 0.2% sodium azide, 95% H2O,5% D2O | 95% H2O/5% D2O | 200mM KCl | 6.3 | ambient | 283 | |
3 | 2D NOESY, 2D TOCSY | 1mM unlabeled RNA, 10mM sodium phosphate buffer, pH 6.3, 200mM KCl, 50uM EDTA, 0.2% sodium azide | 100% D2O | 200mM KCl | 6.3 | ambient | 293 | |
4 | 31P-spin echo difference CT HSQC | 1mM 13C,15N-labeled RNA, 10mM sodium phosphate buffer, pH 6.3, 200mM KCl, 50uM EDTA, 0.2% sodium azide | 100% D2O | 200mM KCl | 6.3 | ambient | 293 | |
5 | 3D 13C-NOESY HMQC, 2D 13C-HMQC,2D HCCH COSY, 3D HCCH TOCSY | 1mM 13C,15N-labeled RNA, 10mM sodium phosphate buffer, pH 6.3, 200mM KCl, 50uM EDTA, 0.2% sodium azide | 100% D2O | 200mM KCl | 6.3 | ambient | 293 | |
6 | CT-CE-HSQC | 1mM 13C,15N-labeled RNA, 10mM sodium phosphate buffer, pH 6.3, 200mM KCl, 50uM EDTA, 0.2% sodium azide | 100% D2O | 200mM KCl | 6.3 | ambient | 293 |
NMR Spectrometer Information | |||
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Spectrometer | Manufacturer | Model | Field Strength |
1 | Bruker | DRX | 500 |
2 | Bruker | DRX | 600 |
NMR Refinement | ||
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Method | Details | Software |
simulated annealing | Structures are based on 283 NOE-derived distance constraints, 86 dihedral angle restraints, 16 distance restraints from hydrogen bonds, and 14 H-C residual dipolar couplings. | XwinNMR |
NMR Ensemble Information | |
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Conformer Selection Criteria | structures with the lowest energy |
Conformers Calculated Total Number | 200 |
Conformers Submitted Total Number | 20 |
Representative Model | 1 (lowest energy) |
Additional NMR Experimental Information | |
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Details | CT-CE-HSQC was used for determining residual dipolar couplings |
Computation: NMR Software | ||||
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# | Classification | Version | Software Name | Author |
1 | collection | XwinNMR | 2.6 | Bruker |
2 | processing | XwinNMR | 2.6 | Bruker |
3 | data analysis | AURELIA | 3.108 | Brunger |
4 | structure solution | X-PLOR | 3.851 | NIH |
5 | refinement | X-PLOR | 3.851 | NIH |