2OEY

Solution Structure of a Designed Spirocyclic Helical Ligand Binding at a Two-Base Bulge Site in DNA

SOLUTION NMR

NMR Experiment
Experiment	Type	Sample Contents	Solvent	Ionic Strength	pH	Pressure	Temperature (K)	Spectrometer
1	2D NOESY	10mM phosphate buffer; 100 mM NaCl	90% H2O/10% D2O	100 mM NaCl	6.8	ambient	273
2	2D NOESY	10mM phosphate buffer; 100 mM NaCl	100% D2O	100 mM NaCl	6.8	ambient	273
3	2D TOCSY	10mM phosphate buffer; 100 mM NaCl	100% D2O	100 mM NaCl	6.8	ambient	273
4	DQF-COSY	10mM phosphate buffer; 100 mM NaCl	100% D2O	100 mM NaCl	6.8	ambient	273

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

NMR Refinement
Method	Details	Software
simulated annealing molecular dynamics	the structures are based on a total of 531 restraints, 506 are NOE-derived distance constraints, 25 dihedral angle restraints,40 distance restraints from hydrogen bonds.	X-PLOR

NMR Ensemble Information
Conformer Selection Criteria	back calculated data agree with experimental NOESY spectrum
Conformers Calculated Total Number	10
Conformers Submitted Total Number	8
Representative Model	1 (lowest energy)

Additional NMR Experimental Information
Details	This structure was determined using standard methods for DNA-drug complex.

Computation: NMR Software
#	Classification	Version	Software Name	Author
1	refinement	X-PLOR	3.851	Bruger
2	data analysis	Felix	2000

RCSB PDB Core Operations are funded by the U.S. National Science Foundation (DBI-2321666), the US Department of Energy (DE-SC0019749), and the National Cancer Institute, National Institute of Allergy and Infectious Diseases, and National Institute of General Medical Sciences of the National Institutes of Health under grant R01GM133198.