2GPQ

Cap-free structure of eIF4E suggests basis for its allosteric regulation

SOLUTION NMR

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NMR Experiment
Experiment	Type	Sample Contents	Solvent	Ionic Strength	pH	Pressure	Temperature (K)	Spectrometer
1	HNCA	0.3mM eIF4E U-98% 15N, U-13C; 50mM phosphate buffer; 100mM NaCl; 1mM DTT; 0.02% NaN3; 90% H2O, 10% D2O	50mM phosphate buffer; 100mM NaCl; 1mM DTT; 0.02% NaN3; 90% H2O, 10% D2O	100 mM NaCl	7.4	ambient	293
2	HNCO	0.3mM eIF4E U-98% 15N, U-13C; 50mM phosphate buffer; 100mM NaCl; 1mM DTT; 0.02% NaN3; 90% H2O, 10% D2O	50mM phosphate buffer; 100mM NaCl; 1mM DTT; 0.02% NaN3; 90% H2O, 10% D2O	100 mM NaCl	7.4	ambient	293
3	HCCH-TOCSY	0.3mM eIF4E U-98% 15N, U-13C; 50mM phosphate buffer; 100mM NaCl; 1mM DTT; 0.02% NaN3; 90% H2O, 10% D2O	50mM phosphate buffer; 100mM NaCl; 1mM DTT; 0.02% NaN3; 90% H2O, 10% D2O	100 mM NaCl	7.4	ambient	293
4	3D 15N-edited NOESY	0.3mM eIF4E U-98% 15N, U-13C; 50mM phosphate buffer; 100mM NaCl; 1mM DTT; 0.02% NaN3; 90% H2O, 10% D2O	50mM phosphate buffer; 100mM NaCl; 1mM DTT; 0.02% NaN3; 90% H2O, 10% D2O	100 mM NaCl	7.4	ambient	293
5	3D-13C-edited NOESY	0.3mM eIF4E U-98% 15N, U-13C; 50mM phosphate buffer; 100mM NaCl; 1mM DTT; 0.02% NaN3; 90% H2O, 10% D2O	50mM phosphate buffer; 100mM NaCl; 1mM DTT; 0.02% NaN3; 90% H2O, 10% D2O	100 mM NaCl	7.4	ambient	293
6	3D 15N-edited NOESY	0.3mM eIF4E U-98% 15N, U-95% D; 50mM phosphate buffer; 100mM NaCl; 1mM DTT; 0.02% NaN3; 90% H2O, 10% D2O	50mM phosphate buffer; 100mM NaCl; 1mM DTT; 0.02% NaN3; 90% H2O, 10% D2O	100 mM NaCl	7.4	ambient	293

NMR Spectrometer Information
Spectrometer	Manufacturer	Model	Field Strength
1	Varian	INOVA	600
2	Varian	INOVA	800

NMR Refinement
Method	Details	Software
simulated annealing	the structures are based on a total of 1973 restraints, 1697 are NOE-derived distance constraints, 276 dihedral angle restraints, 160 distance restraints from hydrogen bonds	VNMR

NMR Ensemble Information
Conformer Selection Criteria	structures with the least restraint violations,structures with the lowest energy
Conformers Calculated Total Number	50
Conformers Submitted Total Number	10
Representative Model	1 (closest to the average)

Additional NMR Experimental Information
Details	The structure was determined using triple-resonance NMR spectroscopy

Computation: NMR Software
#	Classification	Version	Software Name	Author
1	collection	VNMR	6.1C	Varian
2	processing	NMRPipe	2.3	Delaglio
3	data analysis	Sparky	3.112	Goddard & Kneller
4	refinement	CNS	1.1	Brunger