Experiment: 1U2U

Nmr solution structure of a designed heterodimeric leucine zipper

SOLUTION NMR

NMR Experiment
Experiment	Type	Sample Contents	Solvent	Ionic Strength	pH	Pressure	Temperature (K)	Spectrometer
1	DQF-COSY	2.6mM, 90% H2O, 10% D2O	90% H2O/10% D2O	10mM	5.7	AMBIENT	310.00
2	2D TOCSY	2.6mM, 90% H2O, 10% D2O	90% H2O/10% D2O	10mM	5.7	AMBIENT	310.00
3	2D NOESY	2.6mM, 90% H2O, 10% D2O	90% H2O/10% D2O	10mM	5.7	AMBIENT	310.00
4	2D 1H-15N HSQC	2.6mM, 90% H2O, 10% D2O	90% H2O/10% D2O	10mM	5.7	AMBIENT	310.00
5	2D 1H-13C HSQC	2.6mM, 90% H2O, 10% D2O	90% H2O/10% D2O	10mM	5.7	AMBIENT	310.00

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

NMR Refinement
Method	Details	Software
DISTANCE GEOMETRY/ REGULARIZATION, SIMULATED ANNEALING, MOLECULAR DYNAMICS SIMULATION IN VACUO	STRUCTURES WERE CALCULATED ON THE BASIS OF 1246 NOE DERIVED DISTANCE CONSTRAINTS AND 44 PHI ANGLE RESTRAINTS	XwinNMR

NMR Ensemble Information
Conformer Selection Criteria	structures with the least restraint violations, structures with the lowest energy, low deviation of experimental pKa values from pKa derived by continuum electrostatics calculations on structures
Conformers Calculated Total Number	50
Conformers Submitted Total Number	27
Representative Model	25 (closest to the average)

Additional NMR Experimental Information
Details	STRUCTURE WAS DETERMINED USING STANDARD 2D NMR TECHNIQUES

Computation: NMR Software
#	Classification	Version	Software Name	Author
1	collection	XwinNMR	3.0	Bruker
2	data analysis	Felix	2000	Accelrys
3	structure solution	CNS	1.1
4	data analysis	PROCHECK	3.4.4	Laskowski
5	data analysis	WHAT IF	19991018	Vriend
6	refinement	CNS	1.1