8CF2

Solution structure of the RNA helix formed by the 5'-end of U1 snRNA and an A-1 bulged 5'-splice site in complex with SMN-CY

SOLUTION NMR

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NMR Experiment
Experiment	Type	Sample Contents	Solvent	Ionic Strength	pH	Pressure	Temperature (K)	Spectrometer
1	2D 1H-1H TOCSY	1 mM unlableled RNA helix, 1.5 mM unlabeld SMN-CY, 10 mM deuterated MES, 50 mM unlabeld sodium chloride	100% D2O	50 mM	5.5	atm atm	293	Bruker AVIII 700
2	2D 1H-1H NOESY	1 mM unlableled RNA helix, 1.5 mM unlabeld SMN-CY, 10 mM deuterated MES, 50 mM unlabeld sodium chloride	100% D2O	50 mM	5.5	atm atm	293	Bruker AVIII 900
3	2D 1H-13C HSQC	1 mM unlableled RNA helix, 1.5 mM unlabeld SMN-CY, 10 mM deuterated MES, 50 mM unlabeld sodium chloride	100% D2O	50 mM	5.5	atm atm	293	Bruker AVIII 700
4	2D 1H-1H COSY	1 mM unlableled RNA helix, 1.5 mM unlabeld SMN-CY, 10 mM deuterated MES, 50 mM unlabeld sodium chloride	100% D2O	50 mM	5.5	atm atm	293	Bruker AVIII 700

NMR Spectrometer Information
Spectrometer	Manufacturer	Model	Field Strength
1	Bruker	AVIII	900
2	Bruker	AVIII	700

NMR Refinement
Method	Details	Software
simulated annealing		Amber
molecular dynamics		Amber

NMR Ensemble Information
Conformer Selection Criteria	structures with acceptable covalent geometry
Conformers Calculated Total Number	20
Conformers Submitted Total Number	14
Representative Model	1 (lowest energy)

Computation: NMR Software
#	Classification	Version	Software Name	Author
1	refinement	Amber	22	Case, Darden, Cheatham III, Simmerling, Wang, Duke, Luo, ... and Kollman
2	structure calculation	CYANA	3.98	Guntert, Mumenthaler and Wuthrich
3	chemical shift assignment	CARA		Keller and Wuthrich
4	peak picking	CARA		Keller and Wuthrich
5	data analysis	Amber	22	Case, Darden, Cheatham III, Simmerling, Wang, Duke, Luo, ... and Kollman