2L4N

Solution Structure of the Chemokine CCL21

SOLUTION NMR

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NMR Experiment
Experiment	Type	Sample Contents	Solvent	Ionic Strength	pH	Pressure	Temperature (K)	Spectrometer
1	3D_15N-separated_NOESY	0.500 mM [U-100% 13C; U-100% 15N] CCL21/SLC/6Ckine/Exodus-2, 10 % D2O, 25 mM [U-2H] MES, 0.02 % sodium azide, 90% H2O, 10% D2O	90% H2O/10% D2O	21 mM	6.1	AMBIENT	298
2	3D_13C-separated_NOESY	0.500 mM [U-100% 13C; U-100% 15N] CCL21/SLC/6Ckine/Exodus-2, 10 % D2O, 25 mM [U-2H] MES, 0.02 % sodium azide, 90% H2O, 10% D2O	90% H2O/10% D2O	21 mM	6.1	AMBIENT	298
3	3D_13C-separated_NOESY (AROMATIC)	0.500 mM [U-100% 13C; U-100% 15N] CCL21/SLC/6Ckine/Exodus-2, 10 % D2O, 25 mM [U-2H] MES, 0.02 % sodium azide, 90% H2O, 10% D2O	90% H2O/10% D2O	21 mM	6.1	AMBIENT	298

NMR Spectrometer Information
Spectrometer	Manufacturer	Model	Field Strength
1	Bruker	DRX	500

NMR Refinement
Method	Details	Software
AUTOMATED METHODS WERE USED FOR BACKBONE CHEMICAL SHIFT ASSIGNMENT AND ITERATIVE NOE REFINEMENT. FINAL STRUCTURES WERE OBTAINED BY MOLECULAR DYNAMICS IN EXPLICIT SOLVENT	CCL21 STRUCTURES ARE BASED ON A TOTAL OF 743 NOE CONSTRAINTS (355 INTRA, 170 SEQUENTIAL, 64 MEDIUM, 154 LONG RANGE AND 90 PHI AND PSI DIHEDRAL ANGLE CONSTRAINTS)	CYANA

NMR Ensemble Information
Conformer Selection Criteria	target function
Conformers Calculated Total Number	100
Conformers Submitted Total Number	20
Representative Model	1 (lowest energy)

Computation: NMR Software
#	Classification	Version	Software Name	Author
1	structure solution	CYANA		Guntert, Mumenthaler and Wuthrich
2	chemical shift assignment	XEASY		Bartels et al.
3	data analysis	XEASY		Bartels et al.
4	chemical shift assignment	GARANT		Bartels, Guntert, Billeter and Wuthrich
5	processing	NMRPipe		Delaglio, Grzesiek, Vuister, Zhu, Pfeifer and Bax
6	collection	XwinNMR		Bruker Biospin
7	refinement	CYANA		Guntert, Mumenthaler and Wuthrich