Experiment: 1ZQ3

NMR Solution Structure of the Bicoid Homeodomain Bound to the Consensus DNA Binding Site TAATCC

SOLUTION NMR

NMR Experiment
Experiment	Type	Sample Contents	Solvent	Ionic Strength	pH	Pressure	Temperature (K)	Spectrometer
1	3D_13C-separated_NOESY	1mM Bicoid Homeodomain (15N/13C), 1mM Duplex DNA (unlabeled), 10mM phosphate buffer, pH 7.0, 1mM DTT, 1mM PMSF, 1mM EDTA, 1mM sodium azide, 0.3mM leupeptin, 0.2mM pefabloc (Roche), 90% H2O, 10% D2O	90% H2O/10% D2O		7.0	1 atm	295
2	3D_15N-separated_NOESY	1mM Bicoid Homeodomain (15N/13C), 1mM Duplex DNA (unlabeled), 10mM phosphate buffer, pH 7.0, 1mM DTT, 1mM PMSF, 1mM EDTA, 1mM sodium azide, 0.3mM leupeptin, 0.2mM pefabloc (Roche), 90% H2O, 10% D2O	90% H2O/10% D2O		7.0	1 atm	295
3	HNHA	1mM Bicoid Homeodomain (15N/13C), 1mM Duplex DNA (unlabeled), 10mM phosphate buffer, pH 7.0, 1mM DTT, 1mM PMSF, 1mM EDTA, 1mM sodium azide, 0.3mM leupeptin, 0.2mM pefabloc (Roche), 90% H2O, 10% D2O	90% H2O/10% D2O		7.0	1 atm	295
4	2D NOESY	1mM Bicoid Homeodomain (15N/13C), 1mM Duplex DNA (unlabeled), 10mM phosphate buffer, pH 7.0, 1mM DTT, 1mM PMSF, 1mM EDTA, 1mM sodium azide, 0.3mM leupeptin, 0.2mM pefabloc (Roche), 90% H2O, 10% D2O	90% H2O/10% D2O		7.0	1 atm	295

NMR Spectrometer Information
Spectrometer	Manufacturer	Model	Field Strength
1	Varian	INOVA	600
2	Varian	INOVA	800

NMR Refinement
Method	Details	Software
protein structure - fast torsion angle dynamics algorithm (CYANA2.0), DNA structure - NUCGEN and simulated annealing with NMR-derived energy restraints (AMBER7.0), protein-DNA complex - simulated annealing with NMR-derived energy restraints (AMBER7.0), protein-DNA complex refinement - explicit solvent MD simulations (AMBER7.0)	1724 total restraints used, 1076 protein distance restraints(NOESY), 34 protein hydrogen bond restraints(3D NOESY ,i-i+4), 134 angle restraints(HNHA), 192 DNA distance restraints(2D NOESY), 55 watson-crick restraints(B-DNA), 200 DNA angle restraints(B-DNA), 33 protein-DNA distance restraints (2D NOESY)	CYANA

NMR Ensemble Information
Conformer Selection Criteria	structures with the lowest energy
Conformers Calculated Total Number	100
Conformers Submitted Total Number	20
Representative Model	3 (closest to the average)

Computation: NMR Software
#	Classification	Version	Software Name	Author
1	structure solution	CYANA	2.0	Peter Guntert
2	refinement	Amber	7.0	D.A. Case, T.A. Darden, T.E. Cheatham, III, C.L. Simmerling, J. Wang, R.E. Duke, R. Luo, K.M. Merz, B. Wang, D.A. Pearlman, M. Crowley, S. Brozell, V. Tsui, H. Gohlke, J. Mongan, V. Hornak, G. Cui, P. Beroza, C. Schafmeister, J.W. Caldwell, W.S. Ross, and P.A. Kollman.
3	data analysis	Sparky	3.109	T. D. Goddard and D. G. Kneller
4	processing	NMRPipe		F. Delaglio, S. Grzesiek, G. W. Vuister, G. Zhu, J. Pfeifer and A. Bax