2YH0

Solution structure of the closed conformation of human U2AF65 tandem RRM1 and RRM2 domains

SOLUTION NMR

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NMR Experiment
Experiment	Type	Sample Contents	Solvent	Ionic Strength	pH	Pressure	Temperature (K)	Spectrometer
1	1H	90% WATER/10% D2O		70 mM	6.5	1.0 atm	295.0
2	15N HSQC (PRE)	90% WATER/10% D2O		70 mM	6.5	1.0 atm	295.0

NMR Spectrometer Information
Spectrometer	Manufacturer	Model	Field Strength
1	Bruker	AVANCE	600

NMR Refinement
Method	Details	Software
MODIFIED ARIA	FINAL WATER REFINEMENT. THE STRUCTURE WAS DETERMINED USING A MULTI-STEP PROTOCOL. FIRST WITH REFINEMENT OF INDIVIDUAL STRUCTURED DOMAINS FOR RRM1 AND RRM2 OF U2AF65. THE INITIAL COORDINATES OF THE ISOLATED DOMAINS WERE BASED ON PDB ID 2G4B BY SICKMIER ET AL. 2006. MOL. CELL 23, 49- 59. SECOND STEP IS ADDITION AND RANDOMIZATION OF FLEXIBLE AND LINKER RESIDUES. THE THIRD STEP IS MODEL CALCULATION USING RDC ORIENTATION, PRE-BASED DISTANCE, TALOS DIHEDRAL AND HYDROGEN BOND RESTRAINTS WITH THE RRM1 AND RRM2 DOMAINS RESTRAINED TO THEIR INITIAL STARTING STRUCTURES. STRUCTURE CALCULATION INCLUDED DISTANCE RESTRAINTS BASED ON PARAMAGNETIC RELAXATION ENHANCEMENT DATA FROM SEVEN INDEPENDENT CYSTEINE MUTANTS (N155C, A164C, A171C, T209C, D273C, A287C AND A318C) COVALENTLY MODIFIED BY 3-(2- IODOACETAMIDO)-2,2,5,5, TETRAMETHYL-1- PYRROLIDINYLOXY RADICAL (IODOACETAMIDO-PROXYL).	CNS

NMR Ensemble Information
Conformer Selection Criteria	LOWEST ENERGY
Conformers Calculated Total Number	500
Conformers Submitted Total Number	10
Representative Model	1 (n/a)

Computation: NMR Software
#	Classification	Version	Software Name	Author
1	refinement	CNS		BRUNGER,ADAMS,CLORE,DELANO,GROS,GROSSE- KUNSTLEVE,JIANG,KUSZEWSKI,NILGES,PANNU,READ, RICE,SIMONSON,WARREN
2	structure solution	Sparky