1SX0

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	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 307 restraints, 274 are NOE-derived distance restraints, 33 are dihedral angle restraints.	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 initial fold of the domain without using restraints for zinc coordination. A second set of structures has been deposited that is a refinement of this fold using zinc coordination restraints based on EXAFS data for this domain.

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.

RCSB PDB Core Operations are funded by the U.S. National Science Foundation (DBI-2321666), the US Department of Energy (DE-SC0019749), and the National Cancer Institute, National Institute of Allergy and Infectious Diseases, and National Institute of General Medical Sciences of the National Institutes of Health under grant R01GM133198.