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NMR solution structure refinement of yeast iso-1-ferrocytochrome c
SOLUTION NMR
NMR Experiment
Experiment
Type
Sample Contents
Solvent
Ionic Strength
pH
Pressure
Temperature (K)
Spectrometer
1
2D NOESY
2-3 mM cytochrome c, 50 mM phosphate buffer, pH 7.0, 90% H2O, 10% D2O
90% H2O/10% D2O
50 mM phosphate buffer
7
ambient
303
2
2D TOCSY
2-3 mM cytochrome c, 50 mM phosphate buffer, pH 7.0, 90% H2O, 10% D2O
90% H2O/10% D2O
50 mM phosphate buffer
7
ambient
303
3
3D_15N-separated_NOESY
2-3 mM cytochrome c U-15N, 50 mM phosphate buffer, pH 7.0, 90% H2O, 10% D2O
90% H2O/10% D2O
50 mM phosphate buffer
7
ambient
303
4
HNHA
2-3 mM cytochrome c U-15N, 50 mM phosphate buffer, pH 7.0, 90% H2O, 10% D2O
90% H2O/10% D2O
50 mM phosphate buffer
7
ambient
303
5
3D_13C-separated_NOESY
2-3 mM cytochrome c U-15N,13C, 50 mM phosphate buffer, pH 7.0, 90% H2O, 10% D2O
90% H2O/10% D2O
50 mM phosphate buffer
7
ambient
303
NMR Spectrometer Information
Spectrometer
Manufacturer
Model
Field Strength
1
Bruker
AVANCE
700
2
Bruker
AVANCE
800
NMR Refinement
Method
Details
Software
simulated annealing in torsion angle space followed by restrained energy minimization
XwinNMR
NMR Ensemble Information
Conformer Selection Criteria
target function
Conformers Calculated Total Number
500
Conformers Submitted Total Number
35
Representative Model
1 (fewest violations)
Additional NMR Experimental Information
Details
The present structure is a refinement of 1YFC obtained through heteronuclear nmr experiments at higher magnetic field, and additional structural constraints. Resonances assignment was based on HNCA, HN(CO)CA, (H)CCH-TOCSY, H(C)CH-TOCSY, CBCA(CO)NH, and CCC(CO)NH experiments