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CONFORMATIONAL MAPPING OF THE N-TERMINAL SEGMENT OF SURFACTANT PROTEIN B IN LIPID USING 13C-ENHANCED FOURIER TRANSFORM INFRARED SPECTROSCOPY (FTIR)
INFRARED SPECTROSCOPY
NMR Experiment
Experiment
Type
Sample Contents
Solvent
Ionic Strength
pH
Pressure
Temperature (K)
Spectrometer
1
13-C isotope enhanced FTIR
This structure was determined using 13-C isotope enhanced FTIR spectroscopy on a family of selectively labeled chemically synthesized peptides. 13-C carbonyl labels included residues 1,3,5,8,10,11,13,14,15,16,18,25.
Liposomes of 1-palmitoyl-2-oleoyl phosphatidylglycerol (POPG)
10 mM phosphate
7.4
1 atm
298
NMR Spectrometer Information
Spectrometer
Manufacturer
Model
Field Strength
1
Mattson FTIR
Research Series
NMR Refinement
Method
Details
Software
molecular dynamics, simulated annealing
Molecular dynamics (simulated annealing) was used to generate an ensemble of conformers consistent with the FTIR data.
Winfirst
NMR Ensemble Information
Conformer Selection Criteria
structures with acceptable covalent geometry
Conformers Calculated Total Number
15
Conformers Submitted Total Number
10
Representative Model
8 (closest to the average)
Additional NMR Experimental Information
Details
13-C isotope enhanced FTIR study. The coordinates in this entry were generated from 13-C induced spectral shifts which give residue-specific secondary structure information.