1JJD

NMR structure of the Cyanobacterial Metallothionein SmtA

SOLUTION NMR

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NMR Experiment
Experiment	Type	Sample Contents	Solvent	Ionic Strength	pH	Pressure	Temperature (K)	Spectrometer
1	2D NOESY	3mM Zn4SmtA; 50 mM [D-11]TRIS/HCl buffer; 50mM NaCl;	90% H2O/10% D2O	50mM NaCl	7.0	ambient	308
2	HNHA	0.4mM 15N labelled Zn-SmtA; 50 mM [D-11]TRIS/HCl buffer; 50mM NaCl;	90% H2O/10% D2O	50mM NaCl	7.0	ambient	308
3	2D [1H,111Cd] HSQC	3mM Cd4SmtA; 50 mM [D-11]TRIS/HCl buffer; 50mM NaCl;	90% H2O/10% D2O	50mM NaCl	7.0	ambient	308

NMR Spectrometer Information
Spectrometer	Manufacturer	Model	Field Strength
1	Varian	UNITY	600
2	Bruker	DMX	500
3	Bruker	DMX	360

NMR Refinement
Method	Details	Software
distance geometry, torsion angle dynamics	the structure is based on a total of 380 restraints, 291 are NOE-derived distance restraints, 37 are dihedral angle restraints, and 52 are zinc-ligand distance restraints.	VNMR

NMR Ensemble Information
Conformer Selection Criteria	DIANA target function
Conformers Calculated Total Number	500
Conformers Submitted Total Number	1
Representative Model	1 (minimized average structure)

Additional NMR Experimental Information
Details	the average structure was calculated from the best 20 conformers.

Computation: NMR Software
#	Classification	Version	Software Name	Author
1	collection	VNMR	6.1c	Varian
2	processing	XwinNMR	2.1	Bruker
3	data analysis	SYBYL	6.3	Tripos inc.
4	structure solution	DIANA	2.2.1	Wuethrich et al
5	refinement	SYBYL	6.3	Tripos, Inc.