1Z1V

NMR structure of the Saccharomyces cerevisiae Ste50 SAM domain

SOLUTION NMR

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NMR Experiment
Experiment	Type	Sample Contents	Solvent	Ionic Strength	pH	Pressure	Temperature (K)	Spectrometer
1	3D_13C-separated_NOESY	0.8 mM Ste50 SAM U-15N,13C, 20 mM sodium phosphate buffer, pH 7.8, 150 mM sodium chloride, 0.02 % sodium azide, 90% H2O, 10% D2O	90% H2O/10% D2O	150 mM NaCl	7.8	1 atm	293
2	3D_15N-separated_NOESY	0.8 mM Ste50 SAM U-15N,13C, 20 mM sodium phosphate buffer, pH 7.8, 150 mM sodium chloride, 0.02 % sodium azide, 90% H2O, 10% D2O	90% H2O/10% D2O	150 mM NaCl	7.8	1 atm	293

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

NMR Refinement
Method	Details	Software
simulated annealing	Experimental observations: 615 intermolecular NOE distance restraints, 328 short range NOE distance restraints, 163 medium range NOE distance restraints, 149 long range NOE restraints, 42 pairs of hydrogen bond distance restraints and 69 pairs of phi/psi dihedral angle restraints. An initial ensemble of 500 structures were calculated with CYANA 2.0. The top 25 structures with minimum restraint violations were refined in water using XPLOR-NIH and a protocol by C. Spronk. All 25 water refined structures had no NOE violations > 0.5 A and no dihedral violations > 5 degrees. For residues 35-100, the backbone RMSD of the ensemble is 0.75 +/- 0.14 A. Residues 28-32 and 101-107 are disordered.	NMRPipe

NMR Ensemble Information
Conformer Selection Criteria
Conformers Calculated Total Number
Conformers Submitted Total Number	1
Representative Model	1 (lowest energy)

Additional NMR Experimental Information
Details	This structure was determined using standard 3D heteronuclear techniques

Computation: NMR Software
#	Classification	Version	Software Name	Author
1	processing	NMRPipe		Delagio
2	data analysis	NMRView	5.2	Johnson
3	structure solution	CYANA	2.0	Guntert
4	refinement	XPLOR-NIH	2.9.9