𝔖 Bobbio Scriptorium
✦   LIBER   ✦

A raman study of the interaction of Mg2+, Ca2+, and Ba2+ ions with an acidic model membrane

✍ Scribed by Heino Susi

Publisher
Elsevier Science
Year
1981
Tongue
English
Weight
447 KB
Volume
29
Category
Article
ISSN
0009-3084

No coin nor oath required. For personal study only.

✦ Synopsis

The interaction of dipalmitoylphosphatidylglycerol (DPPG) liposomes with divalent ions of magnesium, calcium and barium has been investigated with laser-Raman spectroscopy over the temperature range of 0-60Β°C. The effect of Ca 2+ ions was also investigated as a function of concentration. At a Ca2+/DPPG molar ratio of 0.1, the number of trans carbon to carbon bonds in the hydrocarbon domain of the phospholipid and the lateral order of the hydrocarbon chains was increased both below and above the gel to liquid crystal transition. At higher Ca 2+ concentrations the number of trans bonds and the lateral order is further increased over the entire temperature range studied, while the transition disappears. Magnesium and barium ions have a much smaller ordering effect on the side-chain packing of DPPG llposomes. At a molar ratio of 0.3, the gel to liquid crystal transition is still discernible for DPPG liposomes in the presence of Ba ~+ ions, but not in the presence of Mg 2+ ions.

πŸ“œ SIMILAR VOLUMES

Raman spectroscopic study of the effects
Raman spectroscopic study of the effects of Ca2+, Mg2+, Zn2+, and Cd2+ ions on calf thymus DNA: Binding sites and conformational changes
✍ Marc Langlais; Heidar All Tajmir-Riahi; Rodrigue Savoie πŸ“‚ Article πŸ“… 1990 πŸ› Wiley (John Wiley & Sons) 🌐 English βš– 903 KB

The interaction of Mg2+, Ca2+, Zn2+, and Cd2' with calf thymus DNA has been investigated by Raman spectroscopy. These spectra reveal that all of these ions, and particularly Zn2+, bind to phosphate groups of DNA, causing a slight structural change in the polynucleotide at very small metal : D N A (

Interaction of Ca2+ and Mg2+ with Ionoph
Interaction of Ca2+ and Mg2+ with Ionophores Studied by Using a Pair-Potential Model Based on ab initio Calculations
✍ Martin Welti; ErnΓΆ Pretsch; Enrico Clementi; Wilhelm Simon πŸ“‚ Article πŸ“… 1982 πŸ› John Wiley and Sons 🌐 German βš– 559 KB

## Abstract Atom pair potentials are obtained from __ab initio__ SCF‐LCAO‐MO calculations for model complexes of Mg^2+^ and Ca^2+^ with __N__, __N__‐dimethylacetamide, and malonamide. The SCF‐LCAO‐MO interaction energies for 271 complexes of Mg^2+^ and 271 complexes of Ca^2+^ with these amides were

Multinuclear NMR Study of the Conformati
Multinuclear NMR Study of the Conformational Changes in MepdG and dGpMe upon Interaction with Mg2+, Zn2+ and Hg2+ Ions Reveals the Strengthening of the Anomeric Effect by Soft M2+ Ions
✍ MatjaΕΎ Polak; Janez Plavec πŸ“‚ Article πŸ“… 1999 πŸ› John Wiley and Sons 🌐 English βš– 380 KB πŸ‘ 2 views

A conformational study is reported on 2Ј-deoxyguanosine 5Ј-pseudorotational equilibrium, whereas the interactions of Zn 2+ and Hg 2+ ions with N7 resulted in the shift towards N-methylmonophosphate [MepdG (1)] and 2Ј-deoxyguanosine 3Ј-methylmonophosphate [dGpMe (2)] and their interactions type pseud

Interaction of guanylic acid with the Mg
Interaction of guanylic acid with the Mg(II), Ca(II), Sr(II), and Ba(II) ions in the crystalline solid and aqueous solution: Evidence for the ribose C2β€²-endo/anti and C3β€²-endo/anti conformational changes
✍ Heidar-Ali Tajmir-Riahi πŸ“‚ Article πŸ“… 1991 πŸ› Wiley (John Wiley & Sons) 🌐 English βš– 655 KB

The interaction of guanosine-5'-monophosphoric acid ( H,-GMP ) with the alkaline earth metal ions has been studied in aqueous solution at neutral pH. The crystalline salts of the type Mg-GMP 5H20, Ca-GMP 6H20, Sr-GMP \* 7H20, and Ba-GMP \* 7H20 were isolated and characterized by Fourier transform ir