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 1KCN | pdb_00001kcn

Structure of e109 Zeta Peptide, an Antagonist of the High-Affinity IgE Receptor


SOLUTION NMR
NMR Experiment
ExperimentTypeSample ContentsSolventIonic StrengthpHPressureTemperature (K)Spectrometer
12D NOESY2mM e109 peptide, pH 5.4, 0.1 mM NaN3, 0.1 mM DSS92% H2O/8% D2O5.4ambient288
2DQF-COSY2mM e109 peptide, pH 5.4, 0.1 mM NaN3, 0.1 mM DSS92% H2O/8% D2O5.4ambient288
32D TOCSY2mM e109 peptide, pH 5.4, 0.1 mM NaN3, 0.1 mM DSS92% H2O/8% D2O5.4ambient288
42D COSY-352mM e109 peptide, pH 5.4, 0.1 mM NaN3, 0.1 mM DSS100% D2O5.4ambient288
52D NOESY2mM e109 peptide, pH 5.4, 0.1 mM NaN3, 0.1 mM DSS100% D2O5.4ambient288
62D ROESY2mM e109 peptide, pH 5.4, 0.1 mM NaN3, 0.1 mM DSS92% H2O/8% D2O5.4ambient288
NMR Spectrometer Information
SpectrometerManufacturerModelField Strength
1BrukerDRX500
NMR Refinement
MethodDetailsSoftware
hybrid distance geometry/simulated annealing, then further refined by restrained molecular dynamicsThe structures are based on a total of 101 NOE-derived distance restraints, 18 dihedral angle restraints, and 12 distant restraints from 6 hydrogen bonds.XwinNMR
NMR Ensemble Information
Conformer Selection Criteriastructures with acceptable covalent geometry,structures with the least restraint violations
Conformers Calculated Total Number50
Conformers Submitted Total Number20
Representative Model1 (closest to the average)
Additional NMR Experimental Information
DetailsThis structure was determined using standard 2D homonuclear techniques. 3JHNHA WERE OBTAINED BY FITTING LORENTZIAN LINES TO THE ANTIPHASE DOUBLETS OF HN-HA PEAKS IN A 2QF-COSY SPECTRUM PROCESSED TO HIGH DIGITAL RESOLUTION IN F2. 3JHAHB WERE EXTRACTED FROM A COSY-35 SPECTRUM ACQUIRED IN D2O
Computation: NMR Software
#ClassificationVersionSoftware NameAuthor
1collectionXwinNMR2.1Bruker, Inc.
2data analysisFelix98.0Molecular Simulations, Inc.
3structure solutionDGII98.0Molecular Simulations, Inc.
4refinementDiscover98.0Molecular Simulations, Inc.