1EL0 | pdb_00001el0

SOLUTION STRUCTURE OF THE HUMAN CC CHEMOKINE, I-309

SOLUTION NMR

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NMR Experiment
Experiment	Type	Sample Contents	Solvent	Ionic Strength	pH	Pressure	Temperature (K)	Spectrometer
1	2D NOESY	2 mM I-309, 20 mM sodium acetate buffer, DSS	90% H2O/10% D2O	20 mM	5	ambient	303
2	DQF-COSY	2 mM I-309, 20 mM sodium acetate buffer, DSS	90% H2O/10% D2O	20 mM	5	ambient	303

NMR Spectrometer Information
Spectrometer	Manufacturer	Model	Field Strength
1	Varian	UNITY	600

NMR Refinement
Method	Details	Software
distance geometry, simulated annealing, molecular dynamics	The structures are based on a total of 978 restraints, 911 are NOE-derived distance constraints, 59 dihedral angle restraints, 10 distance restraints from hydrogen bonds.	VNMR

NMR Ensemble Information
Conformer Selection Criteria	structures with favorable non-bond energy
Conformers Calculated Total Number	100
Conformers Submitted Total Number	30
Representative Model	22 (lowest energy)

Additional NMR Experimental Information
Details	This structure was determined using standard 2D homonuclear techniques

Computation: NMR Software
#	Classification	Version	Software Name	Author
1	collection	VNMR	6.1B	Varian
2	refinement	X-PLOR	3.851	Brunger
3	data analysis	NMRView	4.1.2	Johnson