7T1O

Solution structure of 7SK stem-loop 1 with HIV-1 Tat Subtype G Arginine Rich Motif

SOLUTION NMR - SOLUTION SCATTERING

Solution Scattering Data Acquistion	1
Scattering Type	neutron
Radiation/Neutron Source	12.3.1 (SIBYLS) beam line
Synchrotron	Y
Beamline Type	12.3.1
Detector Type	Pilatus3 2M pixel array detector
Detector Manufacturer Details	Dectris
Temperature (K)	283
pH	5.6
Numer of Time Frames Used	10
Protein Concentration Range (mg/mL)
Sample Buffer	10 mM phosphate, 70 mM NaCl, 0.1 mM EDTA
Data Reduction Software	ATSAS
Guiner Mean Radius Of Gyration (nm)	2.3
Sigma Mean Radius Of Gyration
R(XS-1) Mean Cross Sectional Radii (nm)
R(XS-1) Sigma Mean Cross Sectional Radii
R(XS-2) Mean Cross Sectional Radii (nm)
R(XS-2) Sigma Mean Cross Sectional Radii
P(R) Protein Length (nm)

Solution Scattering Data Analysis and Model Fitting
Method	Software	Software Authors	Starting Model	Conformers, Number Calculated	Conformers, Number Submitted	Conformers, Selection Criteria	Best Representative Conformer	Other Details
This structure was calculated with XPLOR-NIH with a CYANA input and minimized with SAXS.

NMR Experiment
Experiment	Type	Sample Contents	Solvent	Ionic Strength	pH	Pressure	Temperature (K)	Spectrometer
1	2D 1H-1H NOESY	0.5 mM Tat G, 0.5 mM 7SK	100% D2O	10mM Phosphate, 70mM NaCl, 0.1mM EDTA mM	5.6	100000 Pa	298	Bruker DMX 700
2	2D 1H-1H NOESY	0.5 mM Tat G, 0.5 mM 7SK	90% H2O/10% D2O	10mM Phosphate, 70mM NaCl, 0.1mM EDTA mM	5.6	100000 Pa	298	Bruker DMX 700

NMR Spectrometer Information
Spectrometer	Manufacturer	Model	Field Strength
1	Bruker	DMX	700

NMR Refinement
Method	Details	Software
simulated annealing		X-PLOR NIH

NMR Ensemble Information
Conformer Selection Criteria	structures with the lowest energy
Conformers Calculated Total Number	100
Conformers Submitted Total Number	10
Representative Model	1 (lowest energy)

Computation: NMR Software
#	Classification	Version	Software Name	Author
1	collection	TopSpin		Bruker Biospin
2	peak picking	NMRView		Johnson, One Moon Scientific
3	chemical shift assignment	NMRView		Johnson, One Moon Scientific
4	data analysis	CYANA		Guntert, Mumenthaler and Wuthrich
5	processing	CYANA		Guntert, Mumenthaler and Wuthrich
6	structure calculation	CYANA		Guntert, Mumenthaler and Wuthrich
7	structure calculation	X-PLOR NIH		Schwieters, Kuszewski, Tjandra and Clore
8	refinement	X-PLOR NIH		Schwieters, Kuszewski, Tjandra and Clore

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.