5IEW | pdb_00005iew

NMR Structures Show Unwinding of the GCN4p Coiled Coil Superhelix Accompanying Disruption of Ion Pairs at Acidic pH

SOLUTION NMR

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NMR Experiment
Experiment	Type	Sample Contents	Solvent	Ionic Strength	pH	Pressure	Temperature (K)	Spectrometer
1	3D HNCACB	1.5 mM [U-99% 13C; U-99% 15N] GCN4p	90% H2O/10% D2O	20 mM	6.6	1 atm	298	Varian INOVA 600
2	2D 1H-15N HSQC	1.5 mM [U-99% 13C; U-99% 15N] GCN4p	90% H2O/10% D2O	20 mM	6.6	1 atm	298	Varian INOVA 600
3	3D 1H-15N NOESY	1.5 mM [U-99% 13C; U-99% 15N] GCN4p	90% H2O/10% D2O	20 mM	6.6	1 atm	298	Varian INOVA 600
4	3D 1H-13C NOESY	1.5 mM [U-99% 13C; U-99% 15N] GCN4p	90% H2O/10% D2O	20 mM	6.6	1 atm	298	Varian INOVA 600
5	3D HNCO	1.5 mM [U-99% 13C; U-99% 15N] GCN4p	90% H2O/10% D2O	20 mM	6.6	1 atm	298	Varian INOVA 600
6	3D IF 1H-13C NOESY	1.5 mM 66%-13C 33%-12C GCN4p	100% D2O	20 mM	6.6	1 atm	298	Varian VNMRS 800

NMR Spectrometer Information
Spectrometer	Manufacturer	Model	Field Strength
1	Varian	INOVA	600
2	Varian	VNMRS	800

NMR Ensemble Information
Conformer Selection Criteria
Conformers Calculated Total Number
Conformers Submitted Total Number	20

Computation: NMR Software
#	Classification	Version	Software Name	Author
1	processing	Felix		Accelrys Software Inc.
2	chemical shift assignment	CcpNMR		CCPN
3	structure calculation	X-PLOR NIH		Schwieters, Kuszewski, Tjandra and Clore
4	refinement	ARIA		Linge, O'Donoghue and Nilges