1LFU

NMR Solution Structure of the Extended PBX Homeodomain Bound to DNA

SOLUTION NMR

---

NMR Experiment
Experiment	Type	Sample Contents	Solvent	Ionic Strength	pH	Pressure	Temperature (K)	Spectrometer
1	3D_15N-separated_NOESY	1.5 mM U-15N PBX:DNA; 20 mM phophate buffer	90% H2O/10% D2O		7.0	ambient	303
2	HNHA	1.5 mM U-15N PBX:DNA; 20 mM phophate buffer	90% H2O/10% D2O		7.0	ambient	303
3	3D_13C-separated_NOESY	1.9 mM U-15N,13C PBX:DNA; 20 mM phosphate buffer	100% D2O		7.0	ambient	303
4	2D NOESY	1.4 mM PBX:DNA; 20 mM phosphate buffer	100% D2O		7.0	ambient	303
5	t1-1H coupled 15N HSQC	2.5 mM PBX:DNA; 5% q=3.0 DMPC:DHPC 20 mM phosphate buffer	100% D2O		6.6	ambient	310
6	t1-1H coupled 13C HSQC, 13C HMQC	1 mM U-15N PBX:DNA; 5% q=3.0 DMPC:DHPC; 20 mM sodium phosphate	90% H2O/10% D2O		6.6	ambient	310
7	t1-1H coupled 15N HSQC	1.5 mM U-15N PBX:DNA; 20 mM phophate buffer	90% H2O/10% D2O		7.0	ambient	303
8	t1-1H coupled 13C HSQC, 13C HMQC	1.4 mM PBX:DNA; 20 mM phosphate buffer	100% D2O		7.0	ambient	303
9	13C filtered 2D NOESY	1.9 mM U-15N,13C PBX:DNA; 20 mM phosphate buffer	100% D2O		7.0	ambient	303

NMR Spectrometer Information
Spectrometer	Manufacturer	Model	Field Strength
1	Bruker	DRX	500
2	Varian	INOVA	750
3	Varian	INOVA	800

NMR Refinement
Method	Details	Software
dynamical annealing	Structures based on a total of 2747 restraints: 2508 NOE-derived distance restraints, 84 hydrogen bonds, 68 dihedral angle and J-coupling restraints and 87 residual dipolar couplings.	XwinNMR

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

Computation: NMR Software
#	Classification	Version	Software Name	Author
1	collection	XwinNMR	2.1	proprietary software
2	collection	VNMR	6.1B	proprietary software
3	processing	Gifa	4.3	Pons, J. L., Malliavin, T. E., and Delsuc, M. A.
4	data analysis	XEASY	1.3.13	Bartels, C., Xia, T.-H., Billeter, M., Guntert, P., and Wuthrich K.
5	data analysis	ARIA	0.5	Nigles, M., Macias, M. J., O'Donoghue, S. I., and Oschkinat, H.
6	refinement	CNS	0.9, 1.1	Brunger, A. T., et al.