1MPV

Structure of bhpBR3, the BAFF-binding loop of BR3 embedded in a beta-hairpin peptide

SOLUTION NMR

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NMR Experiment
Experiment	Type	Sample Contents	Solvent	Ionic Strength	pH	Pressure	Temperature (K)	Spectrometer
1	2D NOESY	2.9 mM bhpBR3 peptide	92% H2O, 8% D2O, 0.1 mM DSS, pH 4.5	no added salt	4.5	ambient	293
2	2D TOCSY	2.9 mM bhpBR3 peptide	92% H2O, 8% D2O, 0.1 mM DSS, pH 4.5	no added salt	4.5	ambient	293
3	DQF-COSY	2.9 mM bhpBR3 peptide	92% H2O, 8% D2O, 0.1 mM DSS, pH 4.5	no added salt	4.5	ambient	293
4	2D NOESY	2.9 mM bhpBR3 peptide	100% D2O, 0.1 mM DSS, pH 4.5	no added salt	4.5	ambient	293
5	COSY-35	2.9 mM bhpBR3 peptide	100% D2O, 0.1 mM DSS, pH 4.5	no added salt	4.5	ambient	293

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

NMR Refinement
Method	Details	Software
hybrid distance geometry/simulated annealing followed by restrained molecular dynamics.	Complete 1H resonance assignments were obtained using standard 2D homonuclear NMR methods. Distance restraints were derived from analysis of a 2D NOESY spectrum (250ms mixing time); HN-Ha coupling constants were obtained from analysis of a DQF-COSY spectrum acquired in water; and HaHb values were obtained from analysis of a COSY-35 spectrum acquired in D2O. Structures were calculated from a total of 119 NOE-derived (including 46 long-range) distance restraints and 16 dihedral angle restraints. Structures satisfy the experimental data very well with no distance or dihedral angle violations greater than 0.1 angstrom or 1 degree, respectively.	XwinNMR

NMR Ensemble Information
Conformer Selection Criteria	structures with the least restraint violations
Conformers Calculated Total Number	80
Conformers Submitted Total Number	20
Representative Model	1 (closest to the average)

Computation: NMR Software
#	Classification	Version	Software Name	Author
1	collection	XwinNMR	1.37.4.2	Bruker
2	data analysis	Felix	98.0	Accelrys
3	structure solution	DGII	98.0	Accelrys
4	refinement	Discover	98.0	Accelrys