1ED7
SOLUTION STRUCTURE OF THE CHITIN-BINDING DOMAIN OF BACILLUS CIRCULANS WL-12 CHITINASE A1
SOLUTION NMR
NMR Experiment | ||||||||
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Experiment | Type | Sample Contents | Solvent | Ionic Strength | pH | Pressure | Temperature (K) | Spectrometer |
1 | 2D NOESY | 1.2 mM 15N-labeled ChBD-ChiA1 in 100 mM KH2PO4-K2HPO4 (pH 6.0) and 10 mM deuterated DTT | 99.8% D2O | 100 | 6.0 | ambient | 310 | |
2 | 3D_15N-separated_NOESY | 2.0 mM 15N-labeled ChBD-ChiA1 in 10 mM KH2PO4-K2HPO4 (pH 6.0) and 10 mM deuterated dithiothreitol (DTT) | 90% H2O/10% D2O | 10 | 6.0 | ambient | 310 | |
3 | HMQC-J | 2.0 mM 15N-labeled ChBD-ChiA1 in 10 mM KH2PO4-K2HPO4 (pH 6.0) and 10 mM deuterated dithiothreitol (DTT) | 90% H2O/10% D2O | 10 | 6.0 | ambient | 310 |
NMR Spectrometer Information | |||
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Spectrometer | Manufacturer | Model | Field Strength |
1 | Bruker | DRX | 500 |
2 | Bruker | DRX | 800 |
NMR Refinement | ||
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Method | Details | Software |
simulated annealing | The structures are based on 493 NOE-based distance, 20 hydrogen bond, and 33 dihedral angle constraints. | X-PLOR |
NMR Ensemble Information | |
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Conformer Selection Criteria | structures with the lowest energy |
Conformers Calculated Total Number | 100 |
Conformers Submitted Total Number | 30 |
Representative Model | 26 (closest to the average) |
Additional NMR Experimental Information | |
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Details | This structure was determined using a uniformly 15N-labeled ChBD-ChiA1. Stereospecific assignments of the methyl groups of the leucine and valine residues were achieved with 15% fractionally 13C-labeled ChBD-ChiA1 dissolved in 99.8% D2O. |
Computation: NMR Software | ||||
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# | Classification | Version | Software Name | Author |
1 | refinement | X-PLOR | 3.851 | Brunger |
2 | structure solution | DYANA | 1.5 | Guentert |
3 | processing | NMRPipe | 1.7 | Delaglio |
4 | collection | XwinNMR | 2.0 | Bruker |
5 | data analysis | nmrPipp | 4.2.4 | Garrett |
6 | data analysis | MOLMOL | 2.3 | Koradi |