Experiment: 2YH1

SOLUTION NMR

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
3	1H	90% WATER/10% D2O		70 mM	6.5	1.0 atm	295.0
4	15N TROSY (HN-N RDC)	90% WATER/10% D2O		70 mM	6.5	1.0 atm	295.0
5	3D HNCO (N-CO RDC)	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
2	Bruker	AVANCE	600
3	Bruker	AVANCE	600

NMR Refinement
Method	Details	Software
MODIFIED ARIA	STRUCTURE CALCULATION INCLUDED DISTANCE RESTRAINTS BASED ON PARAMAGNETIC RELAXATION ENHANCEMENT DATA FROM TEN INDEPENDENT CYSTEINE MUTANTS (N155C, A164C, A171C, L187C, A188C, T209C, D273C, S281C, A287C AND A318C) COVALENTLY MODIFIED BY 3-(2-IODOACETAMIDO)-2,2,5,5, TETRAMETHYL-1-PYRROLIDINYLOXY RADICAL (IODOACETAMIDO- PROXYL). 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 ENTRY 2G4B BY SICKMIER ET AL. 2006 (SEE REMARK 1 REFERENCE). SECOND STEP WAS ADDITION AND RANDOMIZATION OF FLEXIBLE AND LINKER RESIDUES. THE THIRD STEP WAS 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. INTER- MOLECULAR PROTEIN-RNA DISTANCE RESTRAINTS WERE BASED ON ATOMIC DETAILS FROM PDB ENTRY 2G4B AND ASSUMED AN EIGHT- URIDINE BINDING MODE FOR U2AF65 RRM1-RRM2.	CNS

NMR Ensemble Information
Conformer Selection Criteria	LOWEST ENERGY
Conformers Calculated Total Number	125
Conformers Submitted Total Number	10
Representative Model	1 (n/a)

Additional NMR Experimental Information
Details	THE STRUCTURE WAS DETERMINED USING A MULTI-STEP PROTOCOL AS DESCRIBED IN REMARK 3.

Computation: NMR Software
#	Classification	Version	Software Name	Author
1	refinement	CNS	1.2	BRUNGER,ADAMS,CLORE,DELANO,GROS,GROSSE- KUNSTLEVE,JIANG,KUSZEWSKI,NILGES,PANNU, READ,RICE,SIMONSON,WARREN
2	structure solution	Sparky

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.