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Quantum-chemical and empirical calculations on phospholipids: I. The charge distribution of model headgroups of phospholipids obtained by a CNDO-APSG procedure

โœ Scribed by Gustav Peinel


Publisher
Elsevier Science
Year
1975
Tongue
English
Weight
206 KB
Volume
14
Category
Article
ISSN
0009-3084

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โœฆ Synopsis


A modified CNDO-APSG procedure to obtain the charge distributions of the headgroups of phosphatidylserine, -ethanolamine and -choline as monomers and as constituents of hexagonal lattice is presented. The calculated charge distributions are typically zwitter-ionic. There is only a small difference between the charges for the monomer and as constituent of the lattice, from which it may be assumed that the main characteristics of the headgroups are the same in both cases.

Es wird ein modifiziertes CNDO-APSG-Verfahren dargestellt und damit die Landungsverteilung der Kopfgruppen yon Phosphatidylserin, qithanolamin und -cholin als Monomer und als Bestandteil eines ebenen hexagonalen Gitters berechnet. Die erhaltenen Ladungsverteilungen sind typisch zwitterionisch. Es kann nur eine geringe Differenz zwischen den Ladungen fiir das Monomer und als Teil des Gitters festgesteUt werden, woraus man schliessen kann, dass die charakteristischen GriSssen der Kopfgruppen in beiden F~illen gleich sind.


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Quantum-chemical and empirical calculati
โœ T. Weller; H. Frischleder ๐Ÿ“‚ Article ๐Ÿ“… 1975 ๐Ÿ› Elsevier Science ๐ŸŒ English โš– 144 KB

The conformational behaviour and the charge distribution of methylphosphorylcholine has been analyzed within the framework of the PCILO method including phosphorus-oxygen o-and 7r-bonds. In the global minimum of energy the -O-P-O-C-C chain has a (-synclinal, -synclinal, -syn/anticlinal, +anticlinal)