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SOLUTION STRUCTURE OF THE ANALOGUE RETRO-INVERSO (mA-R)REGRIGGC IN CONTACT WITH THE MONOCLONAL ANTIBODY MAB 4X11, NMR, 6 STRUCTURES
SOLUTION NMR
NMR Experiment
Experiment
Type
Sample Contents
Solvent
Ionic Strength
pH
Pressure
Temperature (K)
Spectrometer
1
COSY, TOCSY, NOESY
5 mM peptide, 0.1 mM mAb; 100 mM phosphate buffer containning 0.02% sodium azide
95% H2O/5% D2O
0.1M phosphate
7
1 atm
277
NMR Spectrometer Information
Spectrometer
Manufacturer
Model
Field Strength
1
Bruker
DRX
400
NMR Refinement
Method
Details
Software
Energy minimisation Molecular dynamics (Simulated Annealing)
The structures are based on a set of 35 to 60 backbone-backbone, backbone-side chain and side chain-side chain distance restraints. The phi angle for the non glycine D-residues was constrained between 0 and 175. A distance dependent dielectric constant equal to 4r was applied. The net electric charges were decreased, while those of the N and C terminal charged groups were neglected.
DYANA
NMR Ensemble Information
Conformer Selection Criteria
structures with the lowest energy
Conformers Calculated Total Number
50
Conformers Submitted Total Number
6
Representative Model
5 (lowest energy)
Additional NMR Experimental Information
Details
The peptide/mAb molar ratio was adjusted to 50/1(i.e. 5 mM of peptide and 0.1 mM of mAb)