Experiment: 1SX1

Solution NMR Structure and X-ray Absorption Analysis of the C-Terminal Zinc-Binding Domain of the SecA ATPase

SOLUTION NMR

NMR Experiment
Experiment	Type	Sample Contents	Solvent	Ionic Strength	pH	Pressure	Temperature (K)	Spectrometer
1	DQF-COSY	1.7mM SecA Zinc Binding Domain NA; 20mM deuterated Pipes buffer, 50mM NaCl, 5mM NaN3, 0.5mM TCEP, 3.4mM ZnCl2	100% D2O	50mM NaCl, 5mM NaN3, 3.4mM ZnCl2	7.0	ambient	298
2	2D NOESY	3.5mM SecA Zinc Binding Domain NA; 20mM deuterated Pipes buffer, 50mM NaCl, 5mM NaN3, 0.5mM TCEP, 7mM ZnCl2, 90% H2O, 10% D2O	90% H2O/10% D2O	50mM NaCl, 5mM NaN3, 7mM ZnCl2	7.0	ambient	298
3	2D NOESY	3.5mM SecA Zinc Binding Domain NA; 20mM deuterated Pipes buffer, 50mM NaCl, 5mM NaN3, 0.5mM TCEP, 7mM ZnCl2	100% D2O	50mM NaCl, 5mM NaN3, 7mM ZnCl2	7.0	ambient	298

NMR Spectrometer Information
Spectrometer	Manufacturer	Model	Field Strength
1	Varian	UNITY	500
2	Varian	INOVA	600

NMR Refinement
Method	Details	Software
simulated annealing	structures based on 317 restraints, 274 are NOE-derived distance restraints, 33 are dihedral angle restraints, and 10 are restraints for the tetrahedral coordination of zinc by 3Cys and 1 His.	CNS

NMR Ensemble Information
Conformer Selection Criteria	structures with the least restraint violations
Conformers Calculated Total Number	100
Conformers Submitted Total Number	20
Representative Model	1 (closest to the average)

Additional NMR Experimental Information
Details	This structure was determined using standard two-dimensional 1H NMR techniques. This set of structures is the calculation of the final fold of the domain using restraints for zinc coordination based on EXAFS data for this domain. A second set of structures has been deposited that shows the calculation of the initial fold of the ZBD without using zinc restraints. For remark 500: The bond length is specificed by CNS and not a problem with the structure refinement.

Additional NMR Experimental Information

Details

This structure was determined using standard two-dimensional 1H NMR techniques. This set of structures is the calculation of the final fold of the domain using restraints for zinc coordination based on EXAFS data for this domain. A second set of structures has been deposited that shows the calculation of the initial fold of the ZBD without using zinc restraints. For remark 500: The bond length is specificed by CNS and not a problem with the structure refinement.

Computation: NMR Software
#	Classification	Version	Software Name	Author
1	structure solution	CNS	1.1	Brunger et al.
2	processing	NMRPipe	2.1	Delaglio et al.
3	processing	VNMR	6.1c	Varian
4	data analysis	Pipp/Stapp	4.3.3	Garrett et al.
5	refinement	CNS	1.1	Brunger et al.

1SX1 | pdb_00001sx1

Solution NMR Structure and X-ray Absorption Analysis of the C-Terminal Zinc-Binding Domain of the SecA ATPase