1F6G
POTASSIUM CHANNEL (KCSA) FULL-LENGTH FOLD
SOLUTION NMR
NMR Experiment | ||||||||
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Experiment | Type | Sample Contents | Solvent | Ionic Strength | pH | Pressure | Temperature (K) | Spectrometer |
1 | Power Saturation Experiments in 21% O2 or 10 mM NiEdda | 50-100 uM KcsA, PBS pH 7.2, reconstituted into asolectin vesicles at a 1:500 protein:lipid ratio (molar) | 100% H2O | 50-100 mM | 7.2 | ambient | 293 | |
2 | Dipolar couplings derived from underlabeled samples |
NMR Spectrometer Information | |||
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Spectrometer | Manufacturer | Model | Field Strength |
1 | Bruker | EMX | 3400 |
NMR Refinement | ||
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Method | Details | Software |
simulated annealing | structures are based on a total of 438 restraints, with 84 intra-subunit distance constraints per subunit and 15 inter-subunit constraints | EPR Aquisit |
NMR Ensemble Information | |
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Conformer Selection Criteria | structures with the lowest energy |
Conformers Calculated Total Number | 32 |
Conformers Submitted Total Number | 8 |
Representative Model | 4 (closest to the average) |
Additional NMR Experimental Information | |
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Details | This structure was determined using secondary structure assignments from frequency analysis of solvent accessibility data and tertiary and quaternary structural information from spin-spin dipolar couplings |
Computation: NMR Software | ||||
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# | Classification | Version | Software Name | Author |
1 | collection | EPR Aquisit | 2.32 | Bruker Instruments |
2 | structure solution | Discover | 3 | MSI |
3 | refinement | Discover | 3 | MSI |