Experiment: 2KEC

Structure of SDF-1/CXCL12

SOLUTION NMR

NMR Experiment
Experiment	Type	Sample Contents	Solvent	Ionic Strength	pH	Pressure	Temperature (K)	Spectrometer
1	3D_15N-separated_NOESY	1.56 mM [U-100% 13C; U-100% 15N] CXCL12/SDF1-alpha, 90% H2O, 10% D2O	90% H2O/10% D2O	50	5.5	AMBIENT	298
2	3D_13C-separated_NOESY	1.56 mM [U-100% 13C; U-100% 15N] CXCL12/SDF1-alpha, 90% H2O, 10% D2O	90% H2O/10% D2O	50	5.5	AMBIENT	298
3	3D_13C-separated_NOESY (AROMATIC)	1.56 mM [U-100% 13C; U-100% 15N] CXCL12/SDF1-alpha, 90% H2O, 10% D2O	90% H2O/10% D2O	50	5.5	AMBIENT	298

NMR Spectrometer Information
Spectrometer	Manufacturer	Model	Field Strength
1	Bruker	AVANCE	600

NMR Refinement
Method	Details	Software
molecular dynamics	AUTOMATED METHODS WERE USED FOR BACKBONE CHEMICAL SHIFT ASSIGNMENT AND ITERATIVE NOE REFINEMENT. FINAL STRUCTURES WERE OBTAINED BY MOLECULAR DYNAMICS IN EXPLICIT SOLVENT, CXCL12 STRUCTURES ARE BASED ON A TOTAL OF 1196 NOE CONSTRAINTS ( 336 INTRA, 251 SEQUENTIAL, 218 MEDIUM, 391 LONG RANGE) AND 72 PHI AND PSI DIHEDRAL ANGLE CONSTRAINTS.	Xplor-NIH

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	refinement	Xplor-NIH	2.9.3	SCHWIETERS,C.D.,KUSZEWSKI,J.J.,TJANDRA,N.,CLORE,G.M.
2	collection	XwinNMR	3.5	Bruker
3	processing	NMRPipe	2004	Delagio,F. et al.
4	data analysis	XEASY	1.3	Eccles, C., Guntert, P., Billeter, M., Wuthrich, K.
5	data analysis	GARANT	2.1	C. Bartels
6	structural calculation	CYANA	2.1	Guntert, P.