6T51

NMR structure of KRAS22RT G-quadruplex forming within KRAS promoter region at physological temperature

SOLUTION NMR

NMR Experiment
Experiment	Type	Sample Contents	Solvent	Ionic Strength	pH	Pressure	Temperature (K)	Spectrometer
1	2D 1H-1H NOESY	2 mM KRAS22RT	90% H2O/10% D2O	50 KCl; 10KPi mM	6.66	1 atm	310	Bruker AVANCE III 950
2	2D 1H-13C HSQC	0.5 mM [U-99% 13C; U-99% 15N] KRAS22RT	90% H2O/10% D2O	50 KCl; 10KPi mM	6.66	1 atm	310	Bruker AVANCE III 800
3	2D 1H-15N HSQC	0.5 mM [U-99% 13C; U-99% 15N] KRAS22RT	90% H2O/10% D2O	50 KCl; 10KPi mM	6.66	1 atm	310	Bruker AVANCE III 950

NMR Spectrometer Information
Spectrometer	Manufacturer	Model	Field Strength
1	Bruker	AVANCE III	950
2	Bruker	AVANCE III	800
3	Bruker	AVANCE III	700

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		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

RCSB PDB Core Operations are funded by the U.S. National Science Foundation (DBI-2321666), 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.