2MH6

Solution structure of DNA duplex containing N3T-ethylene-N1I interstrand cross-link

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 mM 5'-D(*CP*AP*GP*TP*TP*CP*CP*A)-3', 0.5 mM 5'-D(*TP*GP*GP*AP*IP*CP*TP*G)-3', 0.5 mM ethane	100% D2O	0.1	7.5	ambient	298
2	2D 1H-1H TOCSY	0.5 mM 5'-D(*CP*AP*GP*TP*TP*CP*CP*A)-3', 0.5 mM 5'-D(*TP*GP*GP*AP*IP*CP*TP*G)-3', 0.5 mM ethane	100% D2O	0.1	7.5	ambient	298
3	2D DQF-COSY	0.5 mM 5'-D(*CP*AP*GP*TP*TP*CP*CP*A)-3', 0.5 mM 5'-D(*TP*GP*GP*AP*IP*CP*TP*G)-3', 0.5 mM ethane	100% D2O	0.1	7.5	ambient	298
4	2D 1H-31P HSQC	0.5 mM 5'-D(*CP*AP*GP*TP*TP*CP*CP*A)-3', 0.5 mM 5'-D(*TP*GP*GP*AP*IP*CP*TP*G)-3', 0.5 mM ethane	100% D2O	0.1	7.5	ambient	298
5	2D 1H-1H NOESY	0.5 mM 5'-D(*CP*AP*GP*TP*TP*CP*CP*A)-3', 0.5 mM 5'-D(*TP*GP*GP*AP*IP*CP*TP*G)-3', 0.5 mM ethane	90% H2O/10% D2O	0.1	7.5	ambient	273

NMR Spectrometer Information
Spectrometer	Manufacturer	Model	Field Strength
1	Varian	Unity Inova	500
2	Varian	VNMRS	500

NMR Refinement
Method	Details	Software
simulated annealing		CNS

NMR Ensemble Information
Conformer Selection Criteria	structures with the least restraint violations and the lowest energy
Conformers Calculated Total Number	25
Conformers Submitted Total Number	11
Representative Model	1 (minimized average structure)

Computation: NMR Software
#	Classification	Version	Software Name	Author
1	refinement	CNS	1.2	Brunger, Adams, Clore, Gros, Nilges and Read
2	processing	NMRPipe		Delaglio, Grzesiek, Vuister, Zhu, Pfeifer and Bax
3	data analysis	NMRView		Johnson, One Moon Scientific
4	collection	VnmrJ		Varian