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The transient complex of poplar plastocyanin with turnip cytochrome f determined with paramagnetic NMR
SOLUTION NMR
NMR Experiment
Experiment
Type
Sample Contents
Solvent
Ionic Strength
pH
Pressure
Temperature (K)
Spectrometer
1
2D 15N HSQC
0.5 mM Cd-substituted poplar plastocyanin + 0.35 mM soluble fragment of turnip cytochrome f in oxidized state
in 10 mM sodium phosphate pH 6.0
94% H2O, 6% D2O
10 mM
6.0
1 atm
303
2
2D 15N HSQC
0.5 mM Cd-substituted poplar plastocyanin + 0.35 mM soluble fragment of turnip cytochrome f in reduced state
in 10 mM sodium phosphate pH 6.0 + 1 mM sodium ascorbate
94% H2O, 6% D2O
11 mM
6.0
1 atm
303
NMR Spectrometer Information
Spectrometer
Manufacturer
Model
Field Strength
1
Bruker
DMX
600
NMR Refinement
Method
Details
Software
Rigid body docking using intermolecular pseudocontact shifts restraints, chemical shift perturbation restraints and electrostatic restraints.
The structures are based on 38 chemical shift perturbation restraints, 42 pseudocontact shifts restraints, 42 pseudocontact angle restraints, 120 minimal distance restraints and 4 electrostatic restraints.
Backbone RMSD (in Angstrom) with the mean for each model:
1: 1.28,
2: 2.26,
3: 1.29,
4: 3.12,
5: 1.52,
6: 1.49,
7: 3.68,
8: 2.68,
9: 1.58,
10: 3.43,
average=2.23+/-0.88
Azara
NMR Ensemble Information
Conformer Selection Criteria
structures with the least restraint violations
Conformers Calculated Total Number
104
Conformers Submitted Total Number
10
Representative Model
1 (closest to the average)
Additional NMR Experimental Information
Details
This structure was determined using the XRD structures of plastocyanin and cytochrome f, docked on the basis of intermolecular pseudocontact shifts and chemical shift perturbations due to binding.