1NZM

NMR structure of the parallel-stranded DNA quadruplex d(TTAGGGT)4 complexed with the telomerase inhibitor RHPS4

SOLUTION NMR

NMR Experiment
Experiment	Type	Sample Contents	Solvent	Ionic Strength	pH	Pressure	Temperature (K)	Spectrometer
1	2D NOESY	1.6mM 2:1 RHPS4-d(TTAGGGT)4, 100 mM KCl, 10 mM K2HPO4 buffer, 1 mM EDTA,90% H2O, 10% D2O	90% H2O/10% D2O		7.0	1 atm	318
2	2D TOCSY	1.6mM 2:1 RHPS4-d(TTAGGGT)4, 100 mM KCl, 10 mM K2HPO4 buffer, 1 mM EDTA,90% H2O, 10% D2O	90% H2O/10% D2O		7.0	1 atm	318
3	DQF-COSY	1.6mM 2:1 RHPS4-d(TTAGGGT)4, 100 mM KCl, 10 mM K2HPO4 buffer, 1 mM EDTA,90% H2O, 10% D2O	90% H2O/10% D2O		7.0	1 atm	318

NMR Spectrometer Information
Spectrometer	Manufacturer	Model	Field Strength
1	Bruker	DRX	500
2	Bruker	AVANCE	600

NMR Refinement
Method	Details	Software
Restrained molecular dynamics	The structures are based on a set of 668 NOE restraints, 161 per strand of the quadruplex DNA (TTAGGGT)4 and 24 for both RHPS4 ligands.No hydrogen-bond restraints used.	ANSIG

NMR Ensemble Information
Conformer Selection Criteria	structures with the least restraint violations
Conformers Calculated Total Number	100
Conformers Submitted Total Number	10
Representative Model	10 (fewest violation)

Additional NMR Experimental Information
Details	This structure was determined using standard 2D NMR techniques

Computation: NMR Software
#	Classification	Version	Software Name	Author
1	data analysis	ANSIG	3.3
2	collection	XwinNMR	2.7
3	processing	XwinNMR	2.7
4	structure solution	Amber	6
5	refinement	Amber	6

RCSB PDB Core Operations are funded by the National Science Foundation (DBI-1832184), 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.