5W8Z

Solution Structure of XPH2, a Hybrid Sequence of Xfaso 1 and Pfl 6, Two Cro Proteins With Different Folds

SOLUTION NMR

NMR Experiment
Experiment	Type	Sample Contents	Solvent	Ionic Strength	pH	Pressure	Temperature (K)	Spectrometer
1	3D_15N-separated_NOESY	0.9 mM [U-15N] XPH2, 50 mM NA- potassium phosphate, 150 mM NA- potassium chloride, 0.01 % NA- sodium azide, 0.1 mM NA- DSS	90% H2O/10% D2O	150 mM	6.5	1 atm	293	Varian INOVA 600
2	3D_13C-separated_NOESY	0.6 mM [U-13C; U-15N] XPH2, 50 mM NA- potassium phosphate, 150 mM NA- potassium chloride, 0.01 % NA- sodium azide, 0.1 mM NA- DSS, 1 M [U-2H] trimethylamine oxide	100% D2O	150 mM	6.5	1 atm	293	Varian INOVA 600
3	3D HNCO	0.8 mM [U-13C; U-15N] XPH2, 50 mM NA- potassium phosphate, 150 mM NA- potassium chloride, 0.01 % NA- sodium azide, 0.1 mM NA- DSS, 1 M [U-2H] trimethylamine oxide	90% H2O/10% D2O	150 mM	6.5	1 atm	293	Varian INOVA 600
4	3D HNCACB	0.8 mM [U-13C; U-15N] XPH2, 50 mM NA- potassium phosphate, 150 mM NA- potassium chloride, 0.01 % NA- sodium azide, 0.1 mM NA- DSS, 1 M [U-2H] trimethylamine oxide	90% H2O/10% D2O	150 mM	6.5	1 atm	293	Varian INOVA 600
5	3D CBCA(CO)NH	0.8 mM [U-13C; U-15N] XPH2, 50 mM NA- potassium phosphate, 150 mM NA- potassium chloride, 0.01 % NA- sodium azide, 0.1 mM NA- DSS, 1 M [U-2H] trimethylamine oxide	90% H2O/10% D2O	150 mM	6.5	1 atm	293	Varian INOVA 600
6	3D HCCH-TOCSY	0.8 mM [U-13C; U-15N] XPH2, 50 mM NA- potassium phosphate, 150 mM NA- potassium chloride, 0.01 % NA- sodium azide, 0.1 mM NA- DSS, 1 M [U-2H] trimethylamine oxide	90% H2O/10% D2O	150 mM	6.5	1 atm	293	Varian INOVA 600
7	2D 1H-13C HSQC aliphatic	1.6 mM [U-10% 13C] XPH2, 50 mM NA- potassium phosphate, 150 mM NA- potassium chloride, 0.01 % NA- sodium azide, 0.1 mM NA- DSS	90% H2O/10% D2O	150 mM	6.5	1 atm	293	Varian INOVA 600
8	2D 1H-15N HSQC	0.9 mM [U-15N] XPH2, 50 mM NA- potassium phosphate, 150 mM NA- potassium chloride, 0.01 % NA- sodium azide, 0.1 mM NA- DSS	90% H2O/10% D2O	150 mM	6.5	1 atm	293	Varian INOVA 600

NMR Spectrometer Information
Spectrometer	Manufacturer	Model	Field Strength
1	Varian	INOVA	600

NMR Refinement
Method	Details	Software
CYANA	Water refinement of the lowest energy 20 structures was performed using CNS	CNS

NMR Ensemble Information
Conformer Selection Criteria	lowest energy
Conformers Calculated Total Number	100
Conformers Submitted Total Number	20
Representative Model	1 (lowest energy)

Computation: NMR Software
#	Classification	Version	Software Name	Author
1	refinement	CNS		Brunger A. T. et.al.
2	structure calculation	CYANA		Guntert, Mumenthaler and Wuthrich
3	chemical shift assignment	Sparky		Goddard
4	peak picking	Sparky		Goddard
5	processing	NMRPipe		Delaglio, Grzesiek, Vuister, Zhu, Pfeifer and Bax

RCSB PDB Core Operations are funded by the U.S. National Science Foundation (DBI-2321666), the US Department of Energy (DE-SC0019749), and the National Cancer Institute, National Institute of Allergy and Infectious Diseases, and National Institute of General Medical Sciences of the National Institutes of Health under grant R01GM133198.