2N89

Tetrameric i-motif structure of dT-dC-dC-CFL-CFL-dC at acidic pH

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	0.5-2.0 mM DNA (5'-D(*TP*CP*CP*(CFL)P*(CFL)P*C)-3'), 10 mM sodium chloride	90% H2O/10% D2O	10	5.0	1 atm	278
2	2D 1H-1H NOESY	0.5-2.0 mM DNA/RNA (5'-R((CFZ)P*(GFZ)P*(CFZ)P*(GFZ)P*(AF2)P*(AF2)D(P*(TAF)P*(TAF)P*(CFL)P*(GFL)P*(CFL)P*(GFL))-3'), 10 mM sodium chloride	100% D2O	10	5.0	1 atm	298
3	2D DQF-COSY	0.5-2.0 mM DNA/RNA (5'-R((CFZ)P*(GFZ)P*(CFZ)P*(GFZ)P*(AF2)P*(AF2)D(P*(TAF)P*(TAF)P*(CFL)P*(GFL)P*(CFL)P*(GFL))-3'), 10 mM sodium chloride	100% D2O	10	5.0	1 atm	298
4	2D 1H-1H TOCSY	0.5-2.0 mM DNA/RNA (5'-R((CFZ)P*(GFZ)P*(CFZ)P*(GFZ)P*(AF2)P*(AF2)D(P*(TAF)P*(TAF)P*(CFL)P*(GFL)P*(CFL)P*(GFL))-3'), 10 mM sodium chloride	100% D2O	10	5.0	1 atm	298
5	2D 1H-19F HOESY	0.5-2.0 mM DNA/RNA (5'-R((CFZ)P*(GFZ)P*(CFZ)P*(GFZ)P*(AF2)P*(AF2)D(P*(TAF)P*(TAF)P*(CFL)P*(GFL)P*(CFL)P*(GFL))-3'), 10 mM sodium chloride	100% D2O	10	5.0	1 atm	298

NMR Spectrometer Information
Spectrometer	Manufacturer	Model	Field Strength
1	Bruker	AVANCE	600
2	Bruker	AVANCE	800
3	Bruker	AVANCE	700

NMR Refinement
Method	Details	Software
molecular dynamics		Amber

NMR Ensemble Information
Conformer Selection Criteria	structures with the lowest energy
Conformers Calculated Total Number	20
Conformers Submitted Total Number	10
Representative Model	1 (closest to the average)

Computation: NMR Software
#	Classification	Version	Software Name	Author
1	geometry optimization	Amber		Case, Darden, Cheatham, III, Simmerling, Wang, Duke, Luo, ... and Kollman
2	data analysis	MOLMOL		Koradi, Billeter and Wuthrich
3	peak picking	Sparky		Goddard
4	refinement	Amber		Case, Darden, Cheatham, III, Simmerling, Wang, Duke, Luo, ... and Kollman