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- W2113236461 abstract "27Al and 31P nuclear magnetic resonance (NMR) spectroscopies were used to investigate aluminum interactions at pH 3.4 with model membranes composed of 1-palmitoyl-2-oleoyl-sn-glycero-3-phosphocholine (POPC). A solution state 27Al NMR difference assay was developed to quantify aluminum binding to POPC multilamellar vesicles (MLVs). Corresponding one-dimensional (1D) fast magic angle spinning (MAS) 31P NMR spectra showed that aluminum induced the appearance of two new isotropic resonances for POPC shifted to -6.4 ppm and -9.6 ppm upfield relative to, and in slow exchange with, the control resonance at -0.6 ppm. Correlation of the (27)Al and (31)P NMR binding data revealed a 1:2 aluminum:phospholipid stoichiometry in the aluminum-bound complex at -9.6 ppm and a 1:1 aluminum:phospholipid stoichiometry in that at -6.4 ppm. Slow MAS 31P NMR spectra demonstrated shifts in the anisotropic chemical shift tensor components of the aluminum-bound POPC consistent with a close coordination of aluminum with phosphorus. A model of the aluminum-bis-phospholipid complex is proposed on the basis of these findings." @default.
- W2113236461 created "2016-06-24" @default.
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- W2113236461 date "2004-11-01" @default.
- W2113236461 modified "2023-10-18" @default.
- W2113236461 title "Aluminum binding to phosphatidylcholine lipid bilayer membranes: 27Al and 31P NMR spectroscopic studies" @default.
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- W2113236461 doi "https://doi.org/10.1016/j.chemphyslip.2004.09.003" @default.
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