6EZ0

Specific phosphorothioate substitution within domain 6 of a group II intron ribozyme leads to changes in local structure and metal ion binding

SOLUTION NMR

NMR Experiment
Experiment	Type	Sample Contents	Solvent	Ionic Strength	pH	Pressure	Temperature (K)	Spectrometer
1	2D 1H-1H NOESY	2 mM alpha-thio-D6-27	100% D2O	50 mM	6.7	1 atm	303	Bruker AVANCE 600
2	2D 1H-1H TOCSY	2 mM alpha-thio-D6-27	100% D2O	50 mM	6.7	1 atm	303	Bruker AVANCE 600
3	2D 1H-13C HSQC aliphatic	2 mM alpha-thio-D6-27	100% D2O	50 mM	6.7	1 atm	303	Bruker AVANCE 600
4	2D 1H-13C HSQC aromatic	2 mM alpha-thio-D6-27	100% D2O	50 mM	6.7	1 atm	303	Bruker AVANCE 600
5	2D 1H-1H NOESY	0.7 mM na alpha-thio-D6-27	90% H2O/10% D2O	50 mM	6.7	1 atm	275	Bruker AVANCE 600

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

NMR Refinement
Method	Details	Software
simulated annealing		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 (lowest energy)

Computation: NMR Software
#	Classification	Version	Software Name	Author
1	refinement	Xplor-NIH		Schwieters, Kuszewski, Tjandra and Clore
2	structure calculation	Xplor-NIH		Schwieters, Kuszewski, Tjandra and Clore
3	chemical shift assignment	Sparky		Goddard
4	peak picking	Sparky		Goddard

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.