1J5M

SOLUTION STRUCTURE OF THE SYNTHETIC 113CD_3 BETA_N DOMAIN OF LOBSTER METALLOTHIONEIN-1

SOLUTION NMR

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NMR Experiment
Experiment	Type	Sample Contents	Solvent	Ionic Strength	pH	Pressure	Temperature (K)	Spectrometer
1	2D-TOCSY	5mM (113Cd)3-beta_N, 5mM d-Tris-HCl	90% H2O/10% D2O	5mM Tris-HCl	7.4	ambient	278
2	2D-NOESY	5mM (113Cd)3-beta_N, 5mM d-Tris-HCl	90% H2O/10% D2O	5mM Tris-HCl	7.4	ambient	278
3	DQF-COSY	5mM (113Cd)3-beta_N, 5mM d-Tris-HCl	90% H2O/10% D2O	5mM Tris-HCl	7.4	ambient	278
4	PE-COSY	5mM (113Cd)3-beta_N, 5mM d-Tris-HCl	90% H2O/10% D2O	5mM Tris-HCl	7.4	ambient	278
5	2D-113Cd-HSQC-TOCSY	5mM (113Cd)3-beta_N, 5mM d-Tris-HCl	90% H2O/10% D2O	5mM Tris-HCl	7.4	ambient	278
6	2D-TOCSY	5mM (113Cd)3-beta_N, 5mM d-Tris-HCl	90% H2O/10% D2O	5mM Tris-HCl	7.4	ambient	298

NMR Spectrometer Information
Spectrometer	Manufacturer	Model	Field Strength
1	Bruker	DRX	500
2	Bruker	DPX	300

NMR Refinement
Method	Details	Software
Ab initio simulated annealing	The structure is based on 276 distance restraints, 240 derived from NOE, 33 metal cluster restraints from 113Cd HSQC TOCSY and 6 restraints from HN-S hydrogen bonds. A total of 27 dihedral angle restraints was applied, 13 phi, 10 chi1 and 4 Cys-Cd chi2 angles. Methylene protons for which no stereospecific assignment could be obtained were treated with the floating chirality procedure in XPLOR.	XwinNMR

NMR Ensemble Information
Conformer Selection Criteria
Conformers Calculated Total Number
Conformers Submitted Total Number	1

Additional NMR Experimental Information
Details	HN-S hydrogen bonds were determined using a 2D long range 1H{113Cd} HMQC experiment

Computation: NMR Software
#	Classification	Version	Software Name	Author
1	collection	XwinNMR	2.5	Bruker
2	processing	XwinNMR	2.5	Bruker
3	data analysis	Felix	2000	MSI
4	structure solution	X-PLOR	3.851	Axel Brunger
5	data analysis	MOLMOL	2k.1	Reto Koradi
6	refinement	X-PLOR	3.851	Axel Brunger