2KOW

Structure of a two-G-tetrad basket-type intramolecular G-quadruplex formed by Giardia telomeric repeat d(TAGGG)4 in K+ solution (with G18-to-INO substitution)

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(*TP*AP*GP*GP*GP*TP*AP*GP*GP*GP*TP*AP*GP*GP*GP*TP*AP*IP*GP*G)-3')-2	100% D2O	90mM K+	7	ambient	298
2	2D 1H-1H JR NOESY	0.5-2.0mM DNA (5'-D(*TP*AP*GP*GP*GP*TP*AP*GP*GP*GP*TP*AP*GP*GP*GP*TP*AP*IP*GP*G)-3')-1	90% H2O/10% D2O	90mM K+	7	ambient	298
3	2D 1H-1H COSY	0.5-2.0mM DNA (5'-D(*TP*AP*GP*GP*GP*TP*AP*GP*GP*GP*TP*AP*GP*GP*GP*TP*AP*IP*GP*G)-3')-2	100% D2O	90mM K+	7	ambient	298
4	2D 1H-1H TOCSY	0.5-2.0mM DNA (5'-D(*TP*AP*GP*GP*GP*TP*AP*GP*GP*GP*TP*AP*GP*GP*GP*TP*AP*IP*GP*G)-3')-2	100% D2O	90mM K+	7	ambient	298
5	2D 1H-13C HSQC	0.5-2.0mM DNA (5'-D(*TP*AP*GP*GP*GP*TP*AP*GP*GP*GP*TP*AP*GP*GP*GP*TP*AP*IP*GP*G)-3')-2	100% D2O	90mM K+	7	ambient	298
6	2D 1H-13C JR HMBC	0.5-2.0mM DNA (5'-D(*TP*AP*GP*GP*GP*TP*AP*GP*GP*GP*TP*AP*GP*GP*GP*TP*AP*IP*GP*G)-3')-1	90% H2O/10% D2O	90mM K+	7	ambient	298
7	15N-FILTERED	0.5-2.0mM DNA (5'-D(*TP*AP*GP*GP*GP*TP*AP*GP*GP*GP*TP*AP*GP*GP*GP*TP*AP*IP*GP*G)-3')-1	90% H2O/10% D2O	90mM K+	7	ambient	298
8	D-LABELED	0.5-2.0mM DNA (5'-D(*TP*AP*GP*GP*GP*TP*AP*GP*GP*GP*TP*AP*GP*GP*GP*TP*AP*IP*GP*G)-3')-1	90% H2O/10% D2O	90mM K+	7	ambient	298

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

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

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	peak picking	Felix	2007	Felix NMR, Inc.
2	processing	Felix	2007	Felix NMR, Inc.
3	collection	TopSpin		Bruker Biospin
4	processing	TopSpin		Bruker Biospin
5	structure solution	X-PLOR NIH	2.21	Schwieters, Kuszewski, Tjandra, Clore
6	refinement	X-PLOR NIH	2.21	Schwieters, Kuszewski, Tjandra, Clore