2KJJ

Dynamics of insulin probed by 1H-NMR amide proton exchange anomalous flexibility of the receptor-binding surface

SOLUTION NMR

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NMR Experiment
Experiment	Type	Sample Contents	Solvent	Ionic Strength	pH	Pressure	Temperature (K)	Spectrometer
1	2D TOCSY	0.5 mM INSULIN A CHAIN-1, 0.5 mM INSULIN B CHAIN-2	90% H2O/10% D2O	0.1	7.4	AMBIENT	298
2	NOESY	0.5 mM INSULIN A CHAIN-1, 0.5 mM INSULIN B CHAIN-2	90% H2O/10% D2O	0.1	7.4	AMBIENT	298
3	COSY	0.5 mM INSULIN A CHAIN-1, 0.5 mM INSULIN B CHAIN-2	90% H2O/10% D2O	0.1	7.4	AMBIENT	298

NMR Spectrometer Information
Spectrometer	Manufacturer	Model	Field Strength
1	Bruker	DRX	700

NMR Refinement
Method	Details	Software
DISTANCE GEOMETRY, SIMULATED ANNEALING	RMSD VALUES FOR ALL 20 STRUCTURES VERSUS GEOMETRIC AVERAGE: (BACKBONE, A2-A19, B3-B26) 0.21 ANGSTR	X-PLOR

NMR Ensemble Information
Conformer Selection Criteria	structures with the lowest energy
Conformers Calculated Total Number	40
Conformers Submitted Total Number	20
Representative Model	1 (closest to the average)

Additional NMR Experimental Information
Details	THIS STRUCTURE WAS DETERMINED USING STANDARD 2D HOMONUCLEAR NMR TECHNIQUES.

Computation: NMR Software
#	Classification	Version	Software Name	Author
1	refinement	X-PLOR	3.85	BRUNGER, A.T. ET AL.
2	structure solution	VNMR_6.1B	6.1B	Varian