Experiment: 2B6G

SOLUTION NMR

NMR Experiment
Experiment	Type	Sample Contents	Solvent	Ionic Strength	pH	Pressure	Temperature (K)	Spectrometer
1	3D_13C-separated_NOESY	0.2-0.8 mM U-15N,13C; 20 mM sodium phosphate buffer, pH 7.8, 150 mM sodium chloride, 0.02 % sodium azide	90% H2O/10% D2O	150 mM NaCl	7.8	ambient	293
2	3D_15N-separated_NOESY	0.2-0.8 mM U-15N,13C; 20 mM sodium phosphate buffer, pH 7.8, 150 mM sodium chloride, 0.02 % sodium azide	90% H2O/10% D2O	150 mM NaCl	7.8	ambient	293
3	2D NOESY	0.2-0.8 mM U-15N,13C; 20 mM sodium phosphate buffer, pH 7.8, 150 mM sodium chloride, 0.02 % sodium azide	90% H2O/10% D2O	150 mM NaCl	7.8	ambient	293
4	2D_12C-filtered_13C-edited_NOESY	0.2-0.8 mM U-15N,13C; 20 mM sodium phosphate buffer, pH 7.8, 150 mM sodium chloride, 0.02 % sodium azide	90% H2O/10% D2O	150 mM NaCl	7.8	ambient	293

NMR Spectrometer Information
Spectrometer	Manufacturer	Model	Field Strength
1	Bruker	AVANCE	600
2	Varian	INOVA	500
3	Varian	INOVA	500

NMR Refinement
Method	Details	Software
simulated annealing	Protein NOE restraints were calibrated from peak volumes to distances ranging from 1.8-5.0 using the CANDID module of CYANA v2.1. Initially, 100 structures were calculated with XPLOR-NIH v2.11.0 starting from a partially docked protein-RNA complex. A simulated annealing approach with internal torsion angle dynamics, delphic database potentials and RNA planarity restraints was used. From the initial ensemble of structures, 20 were selected based upon low energy, no NOE violations > 0.5 angstroms and no dihedral angle violations > 5 degrees. Restraints used for the structure calculation: 882 intraresidue protein-protein NOE, 435 sequential protein-protein NOE, 335 medium range protein-protein NOE, 263 long range protein-protein NOE, 80 protein hydrogen bonds, 60 RNA-RNA NOE, 23 protein-RNA NOE, 140 protein dihedral angle, 93 RNA dihedral angle.	CYANA

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

Computation: NMR Software
#	Classification	Version	Software Name	Author
1	structure solution	CYANA	2.1	Guentert
2	structure solution	XPLOR-NIH	2.11.0	Schweiters
3	refinement	XPLOR-NIH	2.11.0	Schweiters

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 R01GM157729.