6T2G

NMR structure of KRAS32R G25T conformer G-quadruplex within KRAS promoter region

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	2 mM KRAS32R G25T no labelled	90% H2O/10% D2O	50 KCl ; 10 KPi mM	6.66	1 atm	310	Bruker AVANCE III 850
2	2D 1H-15N HSQC	0.5 mM [U-99% 13C; U-99% 15N] KRAS32R G25T	90% H2O/10% D2O	50 KCl ; 10 KPi mM	6.66	1 atm	310	Bruker AVANCE III 850
3	2D 1H-13C HSQC aromatic	0.5 mM [U-99% 13C; U-99% 15N] KRAS32R G25T	90% H2O/10% D2O	50 KCl ; 10 KPi mM	6.66	1 atm	310	Bruker AVANCE III 850

NMR Spectrometer Information
Spectrometer	Manufacturer	Model	Field Strength
1	Bruker	AVANCE III	700
2	Bruker	AVANCE III	850

NMR Refinement
Method	Details	Software
molecular dynamics		Amber

NMR Ensemble Information
Conformer Selection Criteria	structures with the lowest energy
Conformers Calculated Total Number	750
Conformers Submitted Total Number	10
Representative Model	1 (lowest energy)

Computation: NMR Software
#	Classification	Version	Software Name	Author
1	refinement	Amber	12	Case, Darden, Cheatham III, Simmerling, Wang, Duke, Luo, ... and Kollman
2	structure calculation	ARIA		Linge, O'Donoghue and Nilges
3	chemical shift assignment	Sparky		Goddard
4	processing	TopSpin		Bruker Biospin
5	peak picking	CcpNmr Analysis		CCPN