1JWC

NMR SOLUTION STRUCTURE OF THE RNA HAIRPIN BINDING SITE FOR THE HISTONE STEM-LOOP BINDING PROTEIN

SOLUTION NMR

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NMR Experiment
Experiment	Type	Sample Contents	Solvent	Ionic Strength	pH	Pressure	Temperature (K)	Spectrometer
1	noesy	2.3 MM U-13C; 20 MM KPI, 20 MM KCL, 0.02 MM EDTA	100% D2O	100 mM	6.8	ambient	301
2	3D_13C-separated_NOESY	2.3 MM U-13C; 20 MM KPI, 20 MM KCL, 0.02 MM EDTA	100% D2O	100 mM	6.8	ambient	301
3	3D_15N-separated_NOESY	2.5 MM 15N-labeled; 20 MM KPI, 20 MM KCL, 0.02 MM EDTA	100% D2O	100 mM	6.8	ambient	278
4	DQF-COSY	2.5 MM 15N-labeled; 20 MM KPI, 20 MM KCL, 0.02 MM EDTA	100% D2O	100 mM	6.8	ambient	301
5	HetCor	2.5 MM 15N-labeled; 20 MM KPI, 20 MM KCL, 0.02 MM EDTA	100% D2O	100 mM	6.8	ambient	301

NMR Spectrometer Information
Spectrometer	Manufacturer	Model	Field Strength
1	Bruker	AMX	500

NMR Refinement
Method	Details	Software
simulated annealing	CALCULATIONS WERE PERFORMED USING 232 CONFORMATIONALLY RESTRICTIVE NOE DERIVED DISTANCE CONSTRAINTS AND 55 BACKBONE AND 15 RIBOSE TORSION ANGLE CONSTRAINTS. BASE PAIR CONSTRAINTS WERE INTRODUCED FOR SIX BASE PAIRS USING HEAVY ATOM-HEAVY ATOM CONSTRAINTS. COORDINATES ARE FOR THE HAIRPIN DOMAIN ONLY. 5' FLANKING (GGCCAAA) AND 3' FLANKING (ACCCA) COORDINATES ARE NOT INCLUDED WITH THIS DEPOSITION. FEW CONSTRAINTS WERE OBTAINED FOR THESE VERY DYNAMIC REGIONS AND ALTHOUGH THEY WERE INCLUDED AS PART OF THE STRUCTURE CALCULATION, THEIR CONFORMATIONS APPEAR TO BE RANDOMLY DISTRIBUTED.	X-PLOR

NMR Ensemble Information
Conformer Selection Criteria
Conformers Calculated Total Number
Conformers Submitted Total Number	1
Representative Model	1 (minimized average structure)

Additional NMR Experimental Information
Details	THIS STRUCTURE WAS DETERMINED USING A VARIETY OF 2D AND 3D HOMO- AND HETERO-NUCLEAR NMR METHODS

Computation: NMR Software
#	Classification	Version	Software Name	Author
1	refinement	X-PLOR	3.851	Brunger, A.
2	processing	Felix	980	Biosym