1J5C

SOLUTION STRUCTURE OF OXIDIZED PARAMAGNETIC CU(II) PLASTOCYANIN FROM SYNECHOCYSTIS PCC6803

SOLUTION NMR

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NMR Experiment
Experiment	Type	Sample Contents	Solvent	Ionic Strength	pH	Pressure	Temperature (K)	Spectrometer
1	2D NOESY	3 mM plastocyanin U-15N 50 mM phosphate buffer	90% H2O/10% D2O	50 mM phosphate	5.2	ambient	295
2	HNHA	3 mM plastocyanin U-15N 50 mM phosphate buffer	90% H2O/10% D2O	50 mM phosphate	5.2	ambient	295
3	NOE	3 mM plastocyanin U-15N 50 mM phosphate buffer	90% H2O/10% D2O	50 mM phosphate	5.2	ambient	295
4	proton T1 (HSQC)	3 mM plastocyanin U-15N 50 mM phosphate buffer	90% H2O/10% D2O	50 mM phosphate	5.2	ambient	295

NMR Spectrometer Information
Spectrometer	Manufacturer	Model	Field Strength
1	Bruker	AVANCE	600
2	Bruker	AVANCE	800

NMR Refinement
Method	Details	Software
torsion angle dynamics	The protein contains paramagnetic copper(II), whose electronic relaxation times are quite unfavorable for NMR solution studies. The structure has been solved on the basis of 1041 meaningful NOESY cross peaks, 18 1D NOEs, 26 T1 values, 96 dihedral angle constraints and 18 H-bonds. The detection of broad hyperfine shifted signals and their full assignment allowed the identification of the copper(II) ligands and the determination of the Cu-S-C-H dihedral angle for the coordinated cysteine. The global root mean square deviation from the mean structure for the solution structure family is 0.72 and 1.16 for backbone and heavy atoms, respectively.	XwinNMR

NMR Ensemble Information
Conformer Selection Criteria	target function
Conformers Calculated Total Number	400
Conformers Submitted Total Number	35
Representative Model	1 (fewest violations)

Computation: NMR Software
#	Classification	Version	Software Name	Author
1	collection	XwinNMR	2.0	Bruker
2	data analysis	XwinNMR	2.0	Bruker
3	data analysis	XEASY	1.3.13	Xia, Bartels
4	refinement	DYANA	1.5	Guentert