1YBR

Solution structure of the 5'E topology of the i-motif tetramer of d(CCCCAA)

SOLUTION NMR

NMR Experiment
Experiment	Type	Sample Contents	Solvent	Ionic Strength	pH	Pressure	Temperature (K)	Spectrometer
1	2D NOESY	pH 4.5	H2O/D2O	no added salt	4.5	normal	273
2	2D TOCSY	pH 4.5	H2O/D2O	no added salt	4.5	normal	273
3	HMBC	pH 4.5	H2O/D2O	no added salt	4.5	normal	273

NMR Spectrometer Information
Spectrometer	Manufacturer	Model	Field Strength
1	Varian	GX	500

NMR Refinement
Method	Details	Software
simulated annealing	352 NOE-derived distances restraints and 12 H-bonding restraints derived from proton exchange measurements	X-PLOR

NMR Ensemble Information
Conformer Selection Criteria	back calculated data agree with experimental NOESY spectrum
Conformers Calculated Total Number	10
Conformers Submitted Total Number	1
Representative Model	1 (fewest violations)

Additional NMR Experimental Information
Details	Standard 2D methods

Computation: NMR Software
#	Classification	Version	Software Name	Author
1	structure solution	X-PLOR	3.851	Brunger, A.T.
2	refinement	X-PLOR	3.851	Brunger, A.T.

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.