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NMR STRUCTURE OF HOLO CELLULAR RETINOL-BINDING PROTEIN II
SOLUTION NMR
NMR Experiment
Experiment
Type
Sample Contents
Solvent
Ionic Strength
pH
Pressure
Temperature (K)
Spectrometer
1
3D_15N-separated_NOESY
1.5 mM CELLULAR RETINOL-BINDING PROTEIN II U-15N,13C, complexed with all-trans retinol in 1-to-1 molar ratio; 20 mM phosphate buffer
95% H2O/5% D2O
0.081
7.4
ambient
298
2
3D_13C-separated_NOESY
1.5 mM CELLULAR RETINOL-BINDING PROTEIN II U-15N,13C, complexed with all-trans retinol in 1-to-1 molar ratio; 20 mM phosphate buffer
99% D2O
0.081
7.4
ambient
298
3
2D NOESY
1.5 mM CELLULAR RETINOL-BINDING PROTEIN II U-15N,13C, complexed with all-trans retinol in 1-to-1 molar ratio; 20 mM phosphate buffer
95% H2O/5% D2O
0.081
7.4
ambient
298
NMR Spectrometer Information
Spectrometer
Manufacturer
Model
Field Strength
1
Varian
UNITY
500
2
Varian
UNITYPLUS
500
NMR Refinement
Method
Details
Software
distance geometry & simulated annealing
The structure calculations were carried out using TINKER, a software package for molecular mechanics and dynamics. The protocol employs metric matrix distance geometry with pairwise Gaussian metrization followed by simulated annealing. The unique distance geometry algorithm implemented in TINKER overcomes the sampling and scaling problems of earlier distance geometry methods and is computationally more efficient.
Tinker
NMR Ensemble Information
Conformer Selection Criteria
FINAL PENALTY FUNCTION VALUES WITHIN 2 STANDARD DEVIATIONS FROM THE MEAN
Conformers Calculated Total Number
30
Conformers Submitted Total Number
25
Representative Model
2 (closest to the average)
Additional NMR Experimental Information
Details
The structure was determined using triple-resonance NMR spectroscopy