2MPJ

NMR structure of Xenopus RecQ4 zinc knuckle

SOLUTION NMR

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NMR Experiment
Experiment	Type	Sample Contents	Solvent	Ionic Strength	pH	Pressure	Temperature (K)	Spectrometer
1	1D 1H	1.1 mM RecQ4 zinc knuckle-1, 1.25 mM ZnCl2-2, 10 % D2O-3, 20 mM sodium phosphate pH 6.3-4, 150 mM potassium chloride-5, 4 mM DTT-6, 0.3 mM DSS-7	90% H2O/10% D2O	170	6.3	ambient	298
2	2D 1H-15N HSQC	1.1 mM RecQ4 zinc knuckle-1, 1.25 mM ZnCl2-2, 10 % D2O-3, 20 mM sodium phosphate pH 6.3-4, 150 mM potassium chloride-5, 4 mM DTT-6, 0.3 mM DSS-7	90% H2O/10% D2O	170	6.3	ambient	298
3	2D 1H-13C HSQC	1.1 mM RecQ4 zinc knuckle-1, 1.25 mM ZnCl2-2, 10 % D2O-3, 20 mM sodium phosphate pH 6.3-4, 150 mM potassium chloride-5, 4 mM DTT-6, 0.3 mM DSS-7	90% H2O/10% D2O	170	6.3	ambient	298
4	2D 1H-1H TOCSY	1.1 mM RecQ4 zinc knuckle-1, 1.25 mM ZnCl2-2, 10 % D2O-3, 20 mM sodium phosphate pH 6.3-4, 150 mM potassium chloride-5, 4 mM DTT-6, 0.3 mM DSS-7	90% H2O/10% D2O	170	6.3	ambient	298
5	2D 1H-1H NOESY	1.1 mM RecQ4 zinc knuckle-1, 1.25 mM ZnCl2-2, 10 % D2O-3, 20 mM sodium phosphate pH 6.3-4, 150 mM potassium chloride-5, 4 mM DTT-6, 0.3 mM DSS-7	90% H2O/10% D2O	170	6.3	ambient	298

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

NMR Refinement
Method	Details	Software
simulated annealing, molecular dynamics		TopSpin

NMR Ensemble Information
Conformer Selection Criteria	structures with the lowest energy
Conformers Calculated Total Number	100
Conformers Submitted Total Number	15
Representative Model	1 (lowest energy)

Computation: NMR Software
#	Classification	Version	Software Name	Author
1	collection	TopSpin	2.0	Bruker Biospin
2	chemical shift assignment	CcpNMR	2.5.1	CCPN
3	peak picking	CcpNMR	2.5.1	CCPN
4	structure solution	ARIA	2.3.1	Linge, O'Donoghue and Nilges
5	refinement	ARIA	2.3.1	Linge, O'Donoghue and Nilges
6	dihedral angle calculations	TALOS		Cornilescu, Delaglio and Bax
7	geometry optimization	ProcheckNMR		Laskowski and MacArthur
8	refinement	ProcheckNMR		Laskowski and MacArthur