NMR STRUCTURE OF A CONCATEMER OF THE FIRST AND SECOND LIGAND-BINDING MODULES OF THE HUMAN LDL RECEPTOR
SOLUTION NMR
| NMR Experiment | ||||||||
|---|---|---|---|---|---|---|---|---|
| Experiment | Type | Sample Contents | Solvent | Ionic Strength | pH | Pressure | Temperature (K) | Spectrometer |
| 1 | 2D-TOCSY | 1 mM LB1-2, 15 mM CaCl2, pH 5.5 | 95% H2O/5% D2O | 0.045 | 5.5 | atmospheric atm | 310 | |
| 2 | DQF-COSY | 1 mM LB1-2, 15 mM CaCl2, pH 5.5 | 95% H2O/5% D2O | 0.045 | 5.5 | atmospheric atm | 310 | |
| 3 | 2D NOESY | 1 mM LB1-2, 15 mM CaCl2, pH 5.5 | 95% H2O/5% D2O | 0.045 | 5.5 | atmospheric atm | 310 | |
| 4 | E-COSY | 1 mM LB1-2, 15 mM CaCl2, pH 5.5 | 99% D2O | 0.045 | 5.5 | atmospheric atm | 310 | |
| NMR Spectrometer Information | |||
|---|---|---|---|
| Spectrometer | Manufacturer | Model | Field Strength |
| 1 | Bruker | DMX | 750 |
| NMR Refinement | ||
|---|---|---|
| Method | Details | Software |
| Torsion angle dynamics (DYANA) followed by simulated annealing and molecular dynamics (X-PLOR) for calcium coordination | NMR inputs: NOE total 889: 286 intra, 273 sequential, 184 medium, 146 long range; Others: 32 dihedral restraints, 13 h-bonds, 12 calcium coordination | XwinNMR |
| NMR Ensemble Information | |
|---|---|
| Conformer Selection Criteria | structures with the lowest energy |
| Conformers Calculated Total Number | 50 |
| Conformers Submitted Total Number | 20 |
| Representative Model | 2 (lowest energy) |
| Additional NMR Experimental Information | |
|---|---|
| Details | This structure was determined using standard 2D homonuclear techniques |
| Computation: NMR Software | ||||
|---|---|---|---|---|
| # | Classification | Version | Software Name | Author |
| 1 | collection | XwinNMR | 2 | BRUKER |
| 2 | data analysis | XEASY | 1.4 | ETH-Zurich |
| 3 | structure solution | DYANA | 1.5 | Guntert |
| 4 | refinement | X-PLOR | 3.85 | Brunger |
| 5 | data analysis | MOLMOL | 2.6 | Koradi |
