2HEM

NMR structure and Mg2+ binding of an RNA segment that underlies the L7/L12 stalk in the E.coli 50S ribosomal subunit.

SOLUTION NMR

NMR Experiment
Experiment	Type	Sample Contents	Solvent	Ionic Strength	pH	Pressure	Temperature (K)	Spectrometer
1	NOESY	RNA	D2O	0.1	6.5	1 atm	298
2	TOCSY	RNA	H2O/D2O	0.1	6.5	1 atm	298
3	P-HSQC	RNA	H2O/D2O	0.1	6.5	1 atm	298
4	15N-HSQC	RNA	H2O/D2O	0.1	6.5	1 atm	298
5	2D NOESY	RNA	H2O/D2O	0.1	6.5	1 atm	276
6	15N-1H HSQC	RNA	H2O/D2O	0.1	6.5	1 atm	285
7	13C-1H HSQC	RNA	H2O/D2O	0.1	6.5	1 atm	285
8	HNN-COSY	RNA	H2O/D2O	0.1	6.5	1 atm	285

NMR Spectrometer Information
Spectrometer	Manufacturer	Model	Field Strength
1	Bruker		600

NMR Refinement
Method	Details	Software
distance geometry simulated annealing		CNS

NMR Ensemble Information
Conformer Selection Criteria	Lowest energy, fewest VDW violations
Conformers Calculated Total Number
Conformers Submitted Total Number	9
Representative Model	1 (lowest energy)

Computation: NMR Software
#	Classification	Version	Software Name	Author
1	refinement	CNS		Brunger, et. al
2	structure solution	CNS		Brunger, et. al

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.