کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
5371729 1503966 2009 7 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Molecular modeling of amphotericin B-ergosterol primary complex in water II
موضوعات مرتبط
مهندسی و علوم پایه شیمی شیمی تئوریک و عملی
پیش نمایش صفحه اول مقاله
Molecular modeling of amphotericin B-ergosterol primary complex in water II
چکیده انگلیسی
The work presented is a part of our continual study on the behavior of the polyene macrolide antibiotic amphotericin B (AmB) complexes with sterols on the molecular level. In contrast to the previously researched AmB-ergosterol binary complex, the AmB-ergosterol-AmB aggregates simulated of 2:1 stoichiometry retain significantly higher stability and relatively rigid, “sandwich” geometry. Van der Waals forces with a considerable share of the electrostatic interactions are responsible for such behavior. System of the intermolecular hydrogen bonds also seems to be of notable importance for the complex's structure preservation. The most energetically favored geometries match fairly close the geometric criteria and the network of interactions postulated in the contemporary hypothetical and computational models of antibiotic-sterol complexes. On the basis of works previously published and the present study novel hypotheses on the AmB selectivity towards sterols varying in chemical structure and on the possible mechanisms of channel structure formation were presented.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Biophysical Chemistry - Volume 141, Issues 2–3, May 2009, Pages 162-168
نویسندگان
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