1MPE
Ensemble of 20 structures of the tetrameric mutant of the B1 domain of streptococcal protein G
SOLUTION NMR
NMR Experiment | ||||||||
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Experiment | Type | Sample Contents | Solvent | Ionic Strength | pH | Pressure | Temperature (K) | Spectrometer |
1 | 3D_15N-separated_NOESY | 2.89 mM (in monomer) U-15N, 50 mM sodium phosphate buffer, 0.02% sodium azide | 90% H2O/10% D2O | 50 mM sodium phosphate, 0.02% sodium azide | 5.45 | 1 atm | 313 | |
2 | HNHA | 2.89 mM (in monomer) U-15N, 50 mM sodium phosphate buffer, 0.02% sodium azide | 90% H2O/10% D2O | 50 mM sodium phosphate, 0.02% sodium azide | 5.45 | 1 atm | 313 | |
3 | 3D_13C-separated_NOESY | 3.5 mM (in monomer) U-15N,13C, 50 mM sodium phosphate buffer, 0.02% sodium azide | 90% H2O/10% D2O | 50 mM sodium phosphate, 0.02% sodium azide | 5.45 | 1 atm | 313 | |
4 | 4D_13C-separated_NOESY | 3.5 mM (in monomer) U-15N,13C, 50 mM sodium phosphate buffer, 0.02% sodium azide | 100% D2O | 50 mM sodium phosphate, 0.02% sodium azide | 5.45 | 1 atm | 313 | |
5 | 4D_13C/15N-separated_NOESY | 3.5 mM (in monomer) U-15N,13C, 50 mM sodium phosphate buffer, 0.02% sodium azide | 90% H2O/10% D2O | 50 mM sodium phosphate, 0.02% sodium azide | 5.45 | 1 atm | 313 | |
6 | 3D_12C-filtered_13C-separated_NOESY | 1.4 mM (in monomer) 1:1 mixture unlabelled:U-15N,13C, 50 mM sodium phosphate buffer, 0.02% sodium azide | 100% D2O | 50 mM sodium phosphate, 0.02% sodium azide | 5.45 | 1 atm | 313 |
NMR Spectrometer Information | |||
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Spectrometer | Manufacturer | Model | Field Strength |
1 | Bruker | DRX | 800 |
2 | Bruker | DMX | 750 |
3 | Bruker | DMX | 600 |
4 | Bruker | DMX | 500 |
NMR Refinement | ||
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Method | Details | Software |
simulated annealing | NMR constraints (per monomer) 822 NOE-derived distance restraints (534 intramonomer, 288 intermonomer) 42 distance restraints from hydrogen bonds (20 intramonomer, 22 intermonomer) 30 J-coupling restraints, 33 Residual dipolar couplings (HN) 66 backbone dihedral angle restraints 31 sidechain dihedral angle restraints | NMRPipe |
NMR Ensemble Information | |
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Conformer Selection Criteria | structures with least restraint violations and phi, psi angles of residue 46 in allowed region of Ramachrandran plot |
Conformers Calculated Total Number | 100 |
Conformers Submitted Total Number | 21 |
Representative Model | 1 (minimized average structure) |
Additional NMR Experimental Information | |
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Details | T1,T2, and heteronuclear NOEs collected. Dipolar couplings (N-H) were collected as well. Dipolar coupling and chemical shifts from residues with heteronuclear NOE below 0.6 were not used. |
Computation: NMR Software | ||||
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# | Classification | Version | Software Name | Author |
1 | processing | NMRPipe | 2.2 | Frank Delaglio |
2 | data analysis | PIPP | 4.3.2 | Dan Garrett |
3 | collection | XwinNMR | 2.6 | Bruker Corp. |
4 | refinement | X-PLOR | 4.0 | Brunger |
5 | structure solution | CNS | 1.0 | Brunger |