2KM3

Structure of an intramolecular G-quadruplex containing a G.C.G.C tetrad formed by human telomeric variant CTAGGG repeats

SOLUTION NMR

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NMR Experiment
Experiment	Type	Sample Contents	Solvent	Ionic Strength	pH	Pressure	Temperature (K)	Spectrometer
1	2D 1H-1H NOESY	0.5-2.0mM DNA (5'-D(*AP*GP*GP*GP*CP*TP*AP*GP*GP*GP*CP*TP*AP*GP*GP*GP*CP*TP*AP*GP*GP*G)-3')-1, 70mM potassium chloride, 20mM potassium phosphate	90% H2O/10% D2O	90mM K+	7.0	ambient	298
2	2D 1H-1H NOESY	0.5-2.0mM DNA (5'-D(*AP*GP*GP*GP*CP*TP*AP*GP*GP*GP*CP*TP*AP*GP*GP*GP*CP*TP*AP*GP*GP*G)-3')-2, 70mM potassium chloride, 20mM potassium phosphate	100% D2O	90mM K+	7.0	ambient	298
3	2D 1H-1H JR NOESY	0.5-2.0mM DNA (5'-D(*AP*GP*GP*GP*CP*TP*AP*GP*GP*GP*CP*TP*AP*GP*GP*GP*CP*TP*AP*GP*GP*G)-3')-2, 70mM potassium chloride, 20mM potassium phosphate	100% D2O	90mM K+	7.0	ambient	298
4	2D 1H-1H COSY	0.5-2.0mM DNA (5'-D(*AP*GP*GP*GP*CP*TP*AP*GP*GP*GP*CP*TP*AP*GP*GP*GP*CP*TP*AP*GP*GP*G)-3')-2, 70mM potassium chloride, 20mM potassium phosphate	100% D2O	90mM K+	7.0	ambient	298
5	2D 1H-1H TOCSY	0.5-2.0mM DNA (5'-D(*AP*GP*GP*GP*CP*TP*AP*GP*GP*GP*CP*TP*AP*GP*GP*GP*CP*TP*AP*GP*GP*G)-3')-2, 70mM potassium chloride, 20mM potassium phosphate	100% D2O	90mM K+	7.0	ambient	298
6	2D 1H-13C HSQC	0.5-2.0mM DNA (5'-D(*AP*GP*GP*GP*CP*TP*AP*GP*GP*GP*CP*TP*AP*GP*GP*GP*CP*TP*AP*GP*GP*G)-3')-2, 70mM potassium chloride, 20mM potassium phosphate	100% D2O	90mM K+	7.0	ambient	298
7	2D 1H-13C HMBC	0.5-2.0mM DNA (5'-D(*AP*GP*GP*GP*CP*TP*AP*GP*GP*GP*CP*TP*AP*GP*GP*GP*CP*TP*AP*GP*GP*G)-3')-2, 70mM potassium chloride, 20mM potassium phosphate	100% D2O	90mM K+	7.0	ambient	298
8	2D 1H-13C JR HMBC	0.5-2.0mM DNA (5'-D(*AP*GP*GP*GP*CP*TP*AP*GP*GP*GP*CP*TP*AP*GP*GP*GP*CP*TP*AP*GP*GP*G)-3')-2, 70mM potassium chloride, 20mM potassium phosphate	100% D2O	90mM K+	7.0	ambient	298
9	H-D EXCHANGE	0.5-2.0mM DNA (5'-D(*AP*GP*GP*GP*CP*TP*AP*GP*GP*GP*CP*TP*AP*GP*GP*GP*CP*TP*AP*GP*GP*G)-3')-2, 70mM potassium chloride, 20mM potassium phosphate	100% D2O	90mM K+	7.0	ambient	298
10	15N-FILTERED	0.5-2.0mM DNA (5'-D(*AP*GP*GP*GP*CP*TP*AP*GP*GP*GP*CP*TP*AP*GP*GP*GP*CP*TP*AP*GP*GP*G)-3')-2, 70mM potassium chloride, 20mM potassium phosphate	100% D2O	90mM K+	7.0	ambient	298
11	D-LABELED	0.5-2.0mM DNA (5'-D(*AP*GP*GP*GP*CP*TP*AP*GP*GP*GP*CP*TP*AP*GP*GP*GP*CP*TP*AP*GP*GP*G)-3')-2, 70mM potassium chloride, 20mM potassium phosphate	100% D2O	90mM K+	7.0	ambient	298

NMR Spectrometer Information
Spectrometer	Manufacturer	Model	Field Strength
1	Bruker	Avance	700
2	Bruker	Avance	600

NMR Refinement
Method	Details	Software
DGSA-distance geometry simulated annealing, molecular dynamics, matrix relaxation		TOPSPIN

NMR Ensemble Information
Conformer Selection Criteria	back calculated data agree with experimental NOESY spectrum
Conformers Calculated Total Number	100
Conformers Submitted Total Number	10
Representative Model	1 (lowest energy)

Computation: NMR Software
#	Classification	Version	Software Name	Author
1	processing	TOPSPIN		Bruker Biospin
2	peak picking	Felix	2007	Felix NMR, Inc.
3	structure solution	X-PLOR_NIH	2.21	Schwieters, Kuszewski, Tjandra, Clore
4	refinement	X-PLOR_NIH	2.21	Schwieters, Kuszewski, Tjandra, Clore