The conformational behaviour of phosphatidylinositol in model membranes: 2H-NMR studies

Molecular dynamics study of an ?-cyclodextrin-phosphatidylinositol inclusion complex

“…Equilibrium values for dihedrals in the phosphate-inositol link were set to the values suggested by Hansbro et al (1992). In the case of ~CD, force-field parameters were taken from the QUANTA library for glucose molecules and were similar to those proposed by other workers (Koehler et al 1987).…”

Surface potential of phosphoinositide membranes: Comparison between theory and experiment

“…The orientation of the PPI head group in membranes has been studied by using magnetic resonance and neutron diffraction methods (Bushby et al [21]; Hansbro et al [22]; Bradshaw et al [23][24][25]). Some of their conclusions were that the PI molecule in the membrane extends into the aqueous phase more or less perpendicularly to the membrane surface, comparable to our results, and as the inositol ring is more phosphorylated, the inositol ring is more tilted toward the membrane surface (Bradshaw et al [25]).…”

“…Specific non-covalent inositol/protein interaction has been described, including those of the PI transfer protein (Cockcroft [19]) and the glycerol phosphatidylinositol-anchored protein as important functional rafts within membranes (Udenfriend and Kodukula [20]). With respect to the overall picture of such lipid-protein interaction, the preferred orientation of the inositol head group of the phosphoinositides has been investigated with nuclear magnetic resonance (NMR) and neutron diffraction techniques by several investigators (Bushby et al [21]; Hansbro et al [22]; Bradshaw et al [23][24][25]; Kishore and Prestegard [26]). Their data indicate that the inositol group of PI is perpendicular to the membrane surface and extends into the aqueous phase, while the phosphorylated inositol ring in PIP 2 is slightly more tilted to the membrane surface.…”

NMR spectroscopy of basic/aromatic amino acid clusters in membrane proteins

“…Reviews have focused on both lipid systems (e.g. [130]) and lipid-protein interactions [131][132][133][134] As a simple introduction to 31 P NMR, Fig. 7 shows static and MAS 31 P spectra of DMPC:DMPG bilayers containing the bound basic-aromatic model peptide, Ac-KKFSFKK-NH 2 , described above.…”