Conformational Analysis of Amphotericin B — Cholesterol Channel Complex

Conformational Analysis of Amphotericin B — Cholesterol Channel Complex A molecular model of ionic channel formed by flexible molecules of amphotericin B and cholesterol is proposed. Complexes with axial symmetry from 5 to 11 were simulated. In contrast to the model of the channel formed from rigid molecules, flexible molecules form a tightly packed structure consolidated by both dispersive forces and intermolecular hydrogen bonds. Contributions of a lactone ring, polar heads, cholesterol and lipid environments to the global energy of the complex formation are discussed. Among the complexes capable of ionic transport, that of axial symmetry eight is preferable. Two types of complexes, differing by the number of intramolecular hydrogen bonds, are shown to be possible. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png The Journal of Membrane Biology Springer Journals

Conformational Analysis of Amphotericin B — Cholesterol Channel Complex

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Publisher
Springer-Verlag
Copyright
Copyright © Inc. by 1998 Springer-Verlag New York
Subject
Life Sciences; Biochemistry, general; Human Physiology
ISSN
0022-2631
eISSN
1432-1424
D.O.I.
10.1007/s002329900349
Publisher site
See Article on Publisher Site

Abstract

A molecular model of ionic channel formed by flexible molecules of amphotericin B and cholesterol is proposed. Complexes with axial symmetry from 5 to 11 were simulated. In contrast to the model of the channel formed from rigid molecules, flexible molecules form a tightly packed structure consolidated by both dispersive forces and intermolecular hydrogen bonds. Contributions of a lactone ring, polar heads, cholesterol and lipid environments to the global energy of the complex formation are discussed. Among the complexes capable of ionic transport, that of axial symmetry eight is preferable. Two types of complexes, differing by the number of intramolecular hydrogen bonds, are shown to be possible.

Journal

The Journal of Membrane BiologySpringer Journals

Published: Mar 15, 1998

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