1BWX

THE SOLUTION STRUCTURE OF HUMAN PARATHYROID HORMONE FRAGMENT 1-39, NMR, 10 STRUCTURES

SOLUTION NMR

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NMR Experiment
Experiment	Type	Sample Contents	Solvent	Ionic Strength	pH	Pressure	Temperature (K)	Spectrometer
1	NOESY	10% D2O/90% H2O		320 mM	5.8	1 atm	298
2	COSY	10% D2O/90% H2O		320 mM	5.8	1 atm	298
3	TOCSY	10% D2O/90% H2O		320 mM	5.8	1 atm	298

NMR Spectrometer Information
Spectrometer	Manufacturer	Model	Field Strength
1	Bruker	AMX600	600

NMR Refinement
Method	Details	Software
SIMULATED ANNEALING, RESTRAINED MOLECULAR DYNAMICS	THE STRUCTURE CALCULATION FOLLOWED STANDARD PROCEDURES EMPLOYING A HYBRID DISTANCE GEOMETRY MOLECULAR DYNAMICS APPROACH WITH SIMULATED ANNEALING REFINEMENT AND SUBSEQUENT ENERGY MINIMIZATION. FOR THE REFINEMENT THE DIELECTRIC CONSTANT WAS CHANGED TO 4. STRUCTURE PARAMETERS WERE EXTRACTED FROM THE STANDARD FILES PARALLHDG.PRO AND TOPALLHDG.PRO OF X-PLOR 3.1. IN EACH ROUND OF THE STRUCTURE CALCULATION 30 STRUCTURES WERE CALCULATED. OF THE 30 STRUCTURES RESULTING FROM THE FINAL ROUND OF STRUCTURE CALCULATION, THOSE 10 STRUCTURES THAT SHOWED THE LOWEST TOTAL ENERGY VALUES WERE SELECTED FOR FURTHER CHARACTERIZATION.	X-PLOR

NMR Ensemble Information
Conformer Selection Criteria	ENERGY, AGREEMENT WITH EXPERIMENTAL DATA
Conformers Calculated Total Number	30
Conformers Submitted Total Number	10

Additional NMR Experimental Information
Details	THE DISTANCE RESTRAINTS USED FOR STRUCTURE CALCULATION WERE OBTAINED FROM TWO-DIMENSIONAL HOMONUCLEAR 1H- NOESY SPECTRA.

Computation: NMR Software
#	Classification	Version	Software Name	Author
1	refinement	X-PLOR	3.1	BRUNGER
2	structure solution	NDEE
3	structure solution	X-PLOR