1RK7
Solution structure of apo Cu,Zn Superoxide Dismutase: role of metal ions in protein folding
SOLUTION NMR
NMR Experiment | ||||||||
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Experiment | Type | Sample Contents | Solvent | Ionic Strength | pH | Pressure | Temperature (K) | Spectrometer |
1 | CBCA(CO)NH, HNCACB,HNCO,HN(CA)CO,13C H(C)CH-TOCSY,13CC(CO)NH-TOCSY,13C NOESY-HSQC | Apo SOD 2mM enriched in 15N and 13C | 20mM phosphate buffer pH5.0, 10% D2O | 5.0 | 1 atm | 298 | ||
2 | HNHA,HNHB,15N HSQC NOESY,15N HSQC | Apo SOD 2mM enriched in 15N | 20mM phosphate buffer pH5.0, 10% D2O | 5.0 | 1 atm | 298 | ||
3 | 2D NOESY | Apo SOD 2mM | 20mM phosphate buffer pH5.0, 10% D2O | 5.0 | 1 atm | 298 |
NMR Spectrometer Information | |||
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Spectrometer | Manufacturer | Model | Field Strength |
1 | Bruker | AVANCE | 600 |
2 | Bruker | AVANCE | 700 |
3 | Bruker | AVANCE | 800 |
NMR Refinement | ||
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Method | Details | Software |
simulated annealing and restrained energy minimization in vacuum | The structures were calculated using the constraints: 2382 meaningful upper distance limits, 42 dihedral phi angles, 41 dihedral psi angles and 42 proton pairs stereospecifically assigned. The disulphide bridge between C57 and C146 was introduced with the upper and lower distances limits between the CB and SG atoms of the two side chains. | CALIBA |
NMR Ensemble Information | |
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Conformer Selection Criteria | structures with the lowest energy,target function |
Conformers Calculated Total Number | 400 |
Conformers Submitted Total Number | 30 |
Additional NMR Experimental Information | |
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Details | The solution structure of Apo SOD was determined using triple resonance three and bi dimensional and homonuclear bidimensional techniques |
Computation: NMR Software | ||||
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# | Classification | Version | Software Name | Author |
1 | structure solution | CALIBA | Guenter et al. | |
2 | structure solution | GLOMSA | Guenter et al. | |
3 | structure solution | DYANA | Guenter et al. | |
4 | refinement | Amber | Pearlman et al. | |
5 | collection | XwinNMR | ||
6 | data analysis | PROCHECK-NMR AQUA | Laskowski et al. |