Experiment: 1PXE

Solution Structure of a CCHHC Domain of Neural Zinc Finger Factor-1

SOLUTION NMR

NMR Experiment
Experiment	Type	Sample Contents	Solvent	Ionic Strength	pH	Pressure	Temperature (K)	Spectrometer
1	DQF-COSY	2.3 mM NZF-1(487-548) 2.3 mM ZnCl2 55 mM deuterated Tris	This sample was initially prepared in 100% D2O. It was then dried down and resuspended in 95% H2O/5% D2O.	no salt added	6.95	ambient	293
2	2D TOCSY	2.3 mM NZF-1(487-548) 2.3 mM ZnCl2 55 mM deuterated Tris	This sample was initially prepared in 100% D2O. It was then dried down and resuspended in 95% H2O/5% D2O.	no salt added	6.95	ambient	293
3	2D NOESY	2.3 mM NZF-1(487-548) 2.3 mM ZnCl2 55 mM deuterated Tris	This sample was initially prepared in 100% D2O. It was then dried down and resuspended in 95% H2O/5% D2O.	no salt added	6.95	ambient	293
4	15N_HSQC	2.8 mM NZF-1(487-548), U-15N 2.8 mM ZnCl2 36 mM deuterated Tris	98% H2O/2% D2O	no salt added	7.02	ambient	303
5	15N_HSQC_LongRange	2.8 mM NZF-1(487-548), U-15N 2.8 mM ZnCl2 36 mM deuterated Tris	98% H2O/2% D2O	no salt added	7.02	ambient	303
6	3D_HSQC-TOCSY	2.8 mM NZF-1(487-548), U-15N 2.8 mM ZnCl2 36 mM deuterated Tris	98% H2O/2% D2O	no salt added	7.02	ambient	303
7	3D_HSQC-NOESY	2.8 mM NZF-1(487-548), U-15N 2.8 mM ZnCl2 36 mM deuterated Tris	98% H2O/2% D2O	no salt added	7.02	ambient	303
8	15N_HSQC	1.5 mM NZF-1(487-548), U-15N 1.5 mM CdCl2 (Cd-113) 36 mM deuterated Tris	D2O	no salt added	7.00	ambient	303

NMR Spectrometer Information
Spectrometer	Manufacturer	Model	Field Strength
1	Varian	UNITYPLUS	500

NMR Refinement
Method	Details	Software
Torsion angle dynamics Simulated annealing	Zinc-ligand bond lengths were constrained as follows: Zn-S(Cys): 2.30 angstroms Zn-N(His): 2.00 angstroms The ligand configuration around the zinc ion was constrained to tetrahedral geometry by the following constraints: assign (resid 20 and name SG) (resid 25 and name SG) 3.76 0.20 0.20 assign (resid 20 and name SG) (resid 44 and name SG) 3.76 0.20 0.20 assign (resid 25 and name SG) (resid 44 and name SG) 3.76 0.20 0.20 assign (resid 20 and name SG) (resid 38 and name NE2) 3.52 0.20 0.20 assign (resid 25 and name SG) (resid 38 and name NE2) 3.52 0.20 0.20 assign (resid 44 and name SG) (resid 38 and name NE2) 3.52 0.20 0.20 Residues 4-63 were included in the structure calculations.	VNMR

NMR Ensemble Information
Conformer Selection Criteria	The submitted conformer models are those with the lowest energies.
Conformers Calculated Total Number	30
Conformers Submitted Total Number	21
Representative Model	1 (minimized average structure)

Computation: NMR Software
#	Classification	Version	Software Name	Author
1	collection	VNMR	6.1b
2	processing	Felix	98	Accelrys
3	data analysis	In house perl scripts		Berkovits-Cymet, H.J., Amann, B.T.
4	structure solution	CNS	1.1	Gregory Warren, Michael Nilges, John Kuszewski, Marius Clore and Axel Brunger
5	refinement	CNS	1.1	Warren, Nilges, Kuszewski, Clore, Brunger