2M18

Structure of stacked G-quadruplex formed by human TERRA sequence in potassium solution

SOLUTION NMR

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NMR Experiment
Experiment	Type	Sample Contents	Solvent	Ionic Strength	pH	Pressure	Temperature (K)	Spectrometer
1	2D 1H-13C HSQC aliphatic	1.25 mM RNA (5'-R(*GP*GP*GP*UP*UP*AP*GP*GP*GP*U)-3')-1	90% H2O/10% D2O	90	7	ambient	298
2	2D 1H-13C HSQC aromatic	1.25 mM RNA (5'-R(*GP*GP*GP*UP*UP*AP*GP*GP*GP*U)-3')-1	90% H2O/10% D2O	90	7	ambient	298
3	2D 1H-1H TOCSY	1.25 mM RNA (5'-R(*GP*GP*GP*UP*UP*AP*GP*GP*GP*U)-3')-1	90% H2O/10% D2O	90	7	ambient	298
4	2D 1H-1H COSY	1.25 mM RNA (5'-R(*GP*GP*GP*UP*UP*AP*GP*GP*GP*U)-3')-1	90% H2O/10% D2O	90	7	ambient	298
5	2D 1H-1H NOESY	1.25 mM RNA (5'-R(*GP*GP*GP*UP*UP*AP*GP*GP*GP*U)-3')-1	90% H2O/10% D2O	90	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		X-PLOR NIH

NMR Ensemble Information
Conformer Selection Criteria	structures with the lowest energy
Conformers Calculated Total Number	100
Conformers Submitted Total Number	10
Representative Model	1 (lowest energy)

Additional NMR Experimental Information
Details	The structure was determined using NOE

Computation: NMR Software
#	Classification	Version	Software Name	Author
1	structure solution	X-PLOR NIH		Schwieters, Kuszewski, Tjandra and Clore
2	refinement	X-PLOR NIH		Schwieters, Kuszewski, Tjandra and Clore
3	chemical shift assignment	Felix		Accelrys Software Inc.
4	peak picking	Felix		Accelrys Software Inc.