1AWW

SH3 DOMAIN FROM BRUTON'S TYROSINE KINASE, NMR, 42 STRUCTURES

SOLUTION NMR

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NMR Experiment
Experiment	Type	Sample Contents	Solvent	Ionic Strength	pH	Pressure	Temperature (K)	Spectrometer
1	NOESY				6.5		303
2	TOCSY				6.5		303
3	DQF-COSY				6.5		303
4	15N-TOCSY-HSQC				6.5		303
5	15N-NOESY-HSQC				6.5		303
6	HNHA				6.5		303
7	HNHB				6.5		303

NMR Spectrometer Information
Spectrometer	Manufacturer	Model	Field Strength
1	Varian	UNITY 500	500

NMR Refinement
Method	Details	Software
AB INITIO-SIMULATED ANNEALING	THE STRUCTURE WAS DETERMINED USING 756 DISTANCE RESTRAINTS, 52 DIHEDRAL ANGLE RESTRAINTS AND 22 HYDROGEN BOND RESTRAINTS. THE HYDROGEN BOND RESTRAINTS WERE USED ONLY IN THE LAST STEP OF REFINEMENT. 50 STRUCTURES WERE CALCULATED AND REFINED USING AB INITIO SIMULATED ANNEALING PROTOCOL FOR X-PLOR (1). ALL FORCE CONSTANTS AND POTENTIALS WERE SET TO THE DEFAULT (PROTOCOL) VALUES EXCEPT FOR THE VAN DER WAALS' RADII SCALE FACTOR ("REPEL"), WHICH WAS DECREASED TO 0.80 INSTEAD OF 0.75 DURING THE FINAL COOLING STAGES IN THE REFINEMENT. THIS RESULTS IN MORE REASONABLE BACKBONE CONFORMATION AND SOMEWHAT HIGHER X-PLOR TOTAL ENERGIES. CENTER AVERAGING PSEUDOATOM CORRECTION WAS USED FOR ALL DISTANCE RESTRAINT S(2). ON THE BASIS OF X-PLOR TOTAL ENERGY 42 LOWEST ENERGY STRUCTURES WERE SELECTED.	X-PLOR

NMR Ensemble Information
Conformer Selection Criteria	LOWEST ENERGY
Conformers Calculated Total Number	50
Conformers Submitted Total Number	42

Computation: NMR Software
#	Classification	Version	Software Name	Author
1	refinement	X-PLOR	3.851	BRUNGER
2	structure solution	VNMR 4.3 AND	5.2
3	structure solution	ANSIG V.3.2	V.3.2
4	structure solution	X-PLOR	3.851