Modeling of 31P-NMR spectra of magnetically oriented phospholipid liposomes: A new analytical solution.
31P-NMR spectroscopy is widely used for studies of phospholipid liposomes, a commonly used model of a biological membrane. For the correct analysis of 31P-NMR spectra of the liposomes it is necessary to take into account that they are deformed by the magnetic field of the spectrometer. The liposomes become ellipsoidal and this affects the lineshape of the spectrum. In the present communication we suggest a new analytical formula for modeling of 31P-NMR spectra of the prolate phospholipid liposomes. The formula assumes a Lorentzian broadening function and exactly ellipsoidal shape of the liposomes. Based on the formula a program called P-FIT is designed for the practical analysis of the experimental multicomponent spectra of the prolate liposomes. The versatility of the program developed in a Mathematica environment is demonstrated by simulations of a number of 31P-NMR spectra with different complexity.
Dubinnyi
Maxim A
MA
Shemyakin & Ovchinnikov Institute of Bioorganic Chemistry, Russian Academy of Sciences, 16/10 Miklukho-Maklaya str., V-437, Moscow 117997, Russia Federation.
Lesovoy
Dmitry M
DM
Dubovskii
Peter V
PV
Chupin
Vladimir V
VV
Arseniev
Alexander S
AS
D003198:Computer Simulation; D008081:Liposomes / Q000032:analysis / Q000737:chemistry*; D009682:Magnetic Resonance Spectroscopy / Q000379:methods*; D008560:Membrane Fluidity; D008956:Models, Chemical; D008958:Models, Molecular; D008968:Molecular Conformation; D010743:Phospholipids / Q000032:analysis / Q000737:chemistry*; D010761:Phosphorus Radioisotopes; D013057:Spectrum Analysis / Q000379:methods*
D008081:Liposomes; D010743:Phospholipids; D010761:Phosphorus Radioisotopes