2E4I

Human Telomeric DNA mixed-parallel/antiparallel quadruplex under Physiological Ionic Conditions Stabilized by Proper Incorporation of 8-Bromoguanosines

SOLUTION NMR

NMR Experiment
Experiment	Type	Sample Contents	Solvent	Ionic Strength	pH	Pressure	Temperature (K)	Spectrometer
1	2D NOESY	0.6mM DNA; 100mM KCl; 10mM K-phosphate (pH 6.3); 0.01mM DSS	100% D2O	110mM Potassium Ion	6.3	ambient	298
2	2D TOCSY	0.6mM DNA; 100mM KCl; 10mM K-phosphate (pH 6.3); 0.01mM DSS	100% D2O	110mM Potassium Ion	6.3	ambient	298
3	DQF-COSY	0.6mM DNA; 100mM KCl; 10mM K-phosphate (pH 6.3); 0.01mM DSS	100% D2O	110mM Potassium Ion	6.3	ambient	298
4	2D NOESY	0.6mM DNA; 100mM KCl; 10mM K-phosphate (pH 6.3); 0.01mM DSS, 95% H2O, 5% D2O	95% H2O/5% D2O	110mM Potassium Ion	6.3	ambient	298
5	JR-HMBC	1.3mM DNA; 100mM KCl; 10mM K-phosphate (pH 6.3); 0.01mM DSS, 95% H2O, 5% D2O	95% H2O/5% D2O	110mM Potassium Ion	6.3	ambient	298
6	13C-HSQC	1.3mM DNA; 100mM KCl; 10mM K-phosphate (pH 6.3); 0.01mM DSS, 95% H2O, 5% D2O	95% H2O/5% D2O	110mM Potassium Ion	6.3	ambient	298
7	H, P HSQC	0.6mM DNA; 100mM KCl; 10mM K-phosphate (pH 6.3); 0.01mM DSS	100% D2O	110mM Potassium Ion	6.3	ambient	298

NMR Spectrometer Information
Spectrometer	Manufacturer	Model	Field Strength
1	Bruker	AVANCE	800
2	Bruker	AVANCE	600
3	Bruker	AVANCE	500

NMR Refinement
Method	Details	Software
simulated annealing	the structures are based on a total of 752 restraints, 582 are NOE-derived distance constraints, 110 dihedral angle restraints,48 distance restraints from hydrogen bonds, 12 planarity restraints for tetrad planes.	NMRPipe

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

Computation: NMR Software
#	Classification	Version	Software Name	Author
1	processing	NMRPipe	2.4	F. Delaglio
2	processing	XwinNMR	3.5	Bruker
3	data analysis	PIPP	4.3.2	D. Garrett
4	data analysis	Spaky	3.112	T.D. Goddard
5	structure solution	X-PLOR	3.851	A.T. Brunger
6	refinement	X-PLOR	3.851	A.T. Brunger

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.