1BY6

Peptide of human apolipoprotein C-II

SOLUTION NMR

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NMR Experiment
Experiment	Type	Sample Contents	Solvent	Ionic Strength	pH	Pressure	Temperature (K)	Spectrometer
1	2D NOESY	PERDEUTERATED SODIUM DODECYL SULFATE (SDS) IN 160 FOLD MOLAR EXCESS RELATIVE TO PEPTIDE CONCENTRATION	90% H2O/10% D2O		4.1		310
2	2D-TOCSY	PERDEUTERATED SODIUM DODECYL SULFATE (SDS) IN 160 FOLD MOLAR EXCESS RELATIVE TO PEPTIDE CONCENTRATION	90% H2O/10% D2O		4.1		310
3	DQF-COSY	PERDEUTERATED SODIUM DODECYL SULFATE (SDS) IN 160 FOLD MOLAR EXCESS RELATIVE TO PEPTIDE CONCENTRATION	90% H2O/10% D2O		4.1		310

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

NMR Refinement
Method	Details	Software
DISTANCE GEOMETRY/SIMULATED ANNEALING/RELAXATION MATRIX REFINEMENT	THE STRUCTURE OF APOC-II(44-79) IN THE PRESENCE OF SODIUM DODECYL SULFATE WAS REFINED USING A RELAXATION MATRIX REFINEMENT PROTOCOL BASED ON 241 NOESY CROSS- PEAK INTENSITIES MEASURED AT SEVEN DIFFERENT NOESY MIXING TIMES BETWEEN 75 MS AND 300 MS. NO DIHEDRAL RESTRAINTS WERE USED. THIS ENTRY CONTAINS 19 ACCEPTED STRUCTURES. ONE CALCULATED STRUCTURE WAS REJECTED BECAUSE OF HIGH COVALENT ENERGY. STRUCTURE CALCULATIONS WERE PERFORMED WITH THE PROGRAM X-PLOR (AXEL BRUNGER) INCLUDING DISTANCE GEOMETRY CALCULATIONS, SIMULATED ANNEALING (BOTH UNDER THE ISOLATED SPIN PAIR APPROXIMATION AND COMPLETE RELAXATION MATRIX CALCULATIONS) AS WELL AS ENERGY MINIMIZATION WITH A CONJUGATED GRADIENT. THE CHARMM FORCEFIELD WAS USED. FOR DETAILS ON STRUCTURE CALCULATION PLEASE SEE REFERENCE CITED UNDER "JRNL".	X-PLOR

NMR Ensemble Information
Conformer Selection Criteria	structures with acceptable covalent geometry
Conformers Calculated Total Number	20
Conformers Submitted Total Number	19
Representative Model	19 (lowest energy)

Additional NMR Experimental Information
Details	USING WATERGATE FOR WATER SUPPRESSION

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