SOLUTION NMR
| NMR Experiment | ||||||||
|---|---|---|---|---|---|---|---|---|
| Experiment | Type | Sample Contents | Solvent | Ionic Strength | pH | Pressure | Temperature (K) | Spectrometer |
| 1 | 3D_13C-separated_NOESY | 13C,15N-REF2-I; 20 mM Na phosphate buffer pH 6.3, 100 mM NaCl, 50 mM L-Arg, 50 mM L-Glu, 5 mM EDTA, 50 mM 2-mercaptoethanol, 10 mM DTT, 95% H2O, 5% D2O. | 20 mM Na phosphate buffer pH 6.3, 100 mM NaCl, 50 mM L-Arg, 50 mM L-Glu, 5 mM EDTA, 50 mM 2-mercaptoethanol, 10 mM DTT, 95% H2O, 5% D2O. | 0.12 | 6.3 | ambient | 303 | |
| 2 | 3D_15N-separated_NOESY | 15N-REF2-I; 20 mM Na phosphate buffer pH 6.3, 100 mM NaCl, 50 mM L-Arg, 50 mM L-Glu, 5 mM EDTA, 50 mM 2-mercaptoethanol, 10 mM DTT, 95% H2O, 5% D2O. | 20 mM Na phosphate buffer pH 6.3, 100 mM NaCl, 50 mM L-Arg, 50 mM L-Glu, 5 mM EDTA, 50 mM 2-mercaptoethanol, 10 mM DTT, 95% H2O, 5% D2O. | 0.12 | 6.3 | ambient | 303 | |
| 3 | 2D NOESY | 15N-REF2-I; 20 mM Na phosphate buffer pH 6.3, 100 mM NaCl, 50 mM L-Arg, 50 mM L-Glu, 5 mM EDTA, 50 mM 2-mercaptoethanol, 10 mM DTT, 95% H2O, 5% D2O. | 20 mM Na phosphate buffer pH 6.3, 100 mM NaCl, 50 mM L-Arg, 50 mM L-Glu, 5 mM EDTA, 50 mM 2-mercaptoethanol, 10 mM DTT, 95% H2O, 5% D2O. | 0.12 | 6.3 | ambient | 303 | |
| 4 | HSQC-IPAP | 15N,2H-REF2-I; 20 mM Na phosphate buffer pH 6.3, 100 mM NaCl, 50 mM L-Arg, 50 mM L-Glu, 5 mM EDTA, 50 mM 2-mercaptoethanol, 10 mM DTT, 95% H2O, 5% D2O, 5% liquid crystal media made of C12E5 and hexanol. | 20 mM Na phosphate buffer pH 6.3, 100 mM NaCl, 50 mM L-Arg, 50 mM L-Glu, 5 mM EDTA, 50 mM 2-mercaptoethanol, 10 mM DTT, 95% H2O, 5% D2O, 5% liquid crystal media made of C12E5 and hexanol. | 0.12 | 6.3 | ambient | 303 | |
| NMR Spectrometer Information | |||
|---|---|---|---|
| Spectrometer | Manufacturer | Model | Field Strength |
| 1 | Bruker | DRX | 600 |
| 2 | Varian | INOVA | 800 |
| NMR Refinement | ||
|---|---|---|
| Method | Details | Software |
| ARIA protocol (Nilges et al., 1997, J. Mol. Biol. 269, 408-422) used for structure calculation. | Residual dipolar couplings were measured in 5% PEG liquid crystal media (C12E5 + hexane, Ruckert and Otting, 2000, J. Am. Chem. Soc. 122, 7793) and used as SANI restraints in ARIA. | XwinNMR |
| NMR Ensemble Information | |
|---|---|
| Conformer Selection Criteria | structures with the lowest energy |
| Conformers Calculated Total Number | 20 |
| Conformers Submitted Total Number | 14 |
| Representative Model | 1 (lowest energy) |
| Additional NMR Experimental Information | |
|---|---|
| Details | The protein construct contains 14-residue N-terminal T7 tag (MASMTGGQQMGRDP), and C-terminal tag (LEHHHHHH). The T7 tag is unstructured and is omitted in the coordinate file, where residue numbering starts from residue 1 of REF2-I. Last three residues (LEH) in the coordinate file originate from the beginning of C-terminal tag. The N-terminal domain (1-74) of REF2-I is flexible and is largely unstructured, apart from the region 8-18 which forms a transient helix. |
| Computation: NMR Software | ||||
|---|---|---|---|---|
| # | Classification | Version | Software Name | Author |
| 1 | collection | XwinNMR | 3.5 | Bruker |
| 2 | processing | NMRPipe | Delaglio et al. | |
| 3 | data analysis | NMRView | 5.1 | Johnson and Blevins |
| 4 | structure solution | ARIA | 1.1 | Nilges et al. |
| 5 | structure solution | CNS | 1.0 | Brunger |
| 6 | refinement | CNS | 1.0 | Brunger |
