6FY6

Concerted dynamics of metallo-base pairs in an A/B-form helical transition (major species)

SOLUTION NMR

NMR Experiment
Experiment	Type	Sample Contents	Solvent	Ionic Strength	pH	Pressure	Temperature (K)	Spectrometer
1	2D 1H-1H NOESY	0.4 mM polydeoxyribonucleotide, 1.2 mM MERCURY (II) ION	100% D2O	50 mM	7.35	ambient atm	298	Bruker AVANCE 700
6	2D 1H-1H NOESY	0.4 mM polydeoxyribonucleotide, 1.2 mM MERCURY (II) ION	100% D2O	50 mM	7.35	ambient atm	298	Bruker AVANCE 600
2	2D 1H-1H COSY	0.4 mM polydeoxyribonucleotide, 1.2 mM MERCURY (II) ION	100% D2O	50 mM	7.35	ambient atm	298	Bruker AVANCE 600
3	2D 1H-1H TOCSY	0.4 mM polydeoxyribonucleotide, 1.2 mM MERCURY (II) ION	100% D2O	50 mM	7.35	ambient atm	298	Bruker AVANCE 600
7	2D 1H-13C HSQC aliphatic	0.4 mM polydeoxyribonucleotide, 1.2 mM MERCURY (II) ION	100% D2O	50 mM	7.35	ambient atm	298	Bruker AVANCE 600
8	2D 1H-13C HSQC aromatic	0.4 mM polydeoxyribonucleotide, 1.2 mM MERCURY (II) ION	100% D2O	50 mM	7.35	ambient atm	298	Bruker AVANCE 600
4	2D 1H-1H NOESY	0.4 mM polydeoxyribonucleotide, 1.2 mM MERCURY (II) ION	90% H2O/10% D2O	50 mM	7.75	ambient atm	277	Bruker AVANCE 600

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

NMR Refinement
Method	Details	Software
simulated annealing	2000 preliminary structures were calculated. The 20 lowest energy structures were selected and subsequently refined. Of the 200 refined conformers calculated the 20 lowest energy structures were chosen	Xplor-NIH

NMR Ensemble Information
Conformer Selection Criteria	structures with the lowest energy
Conformers Calculated Total Number	200
Conformers Submitted Total Number	20
Representative Model	1 (fewest violations)

Computation: NMR Software
#	Classification	Version	Software Name	Author
1	collection	TopSpin	4.0.0.b.16	Bruker Biospin
2	structure calculation	Xplor-NIH	2.46	G. Marius Clore , Guillermo Bermejo, , John Kuszewski, Charles D. Schwieters, and Nico Tjandra
3	chemical shift assignment	Sparky		Goddard
4	peak picking	Sparky		Goddard
5	refinement	Xplor-NIH	2.46	G. Marius Clore , Guillermo Bermejo, , John Kuszewski, Charles D. Schwieters, and Nico Tjandra

RCSB PDB Core Operations are funded by the National Science Foundation (DBI-1832184), 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.