...
  • 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Biophysical Chemistry: An International Journal Devoted to the Physical Chemistry of Biological Phenomena >Peptide-bilayer interactions: simulations of dermaseptin B, an antimicrobial peptide.
【24h】

Peptide-bilayer interactions: simulations of dermaseptin B, an antimicrobial peptide.

机译：肽-双层相互作用：抗菌肽dermaseptin B的模拟。

获取原文
获取原文并翻译 | 示例
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

Dermaseptins, a family of antimicrobial peptides, are believed to act by forming amphipathic alpha-helices which associate with the cell membrane, leading to its permeabilisation and disruption. A simple mean field method is described for simulation of the interactions of peptides with lipid bilayers which includes an approximate representation of the electrostatic effects of the head-group region of the bilayer. Starting from an atomistic model of a PC phospholipid bilayer we calculate an average electrostatic potential along the bilayer normal. By combining the interaction of the peptide with this electrostatic potential and with the hydrophobic core of the membrane we arrive at a more complete description of peptide-bilayer energetics than would be obtained using sidechain hydrophobicities alone. Using this interaction potential in MD simulations of the frog skin peptide dermaseptin B reveals that the lipid bilayer stabilises the alpha-helical conformation of the peptide. This is in agreement with FTIR data. A surface associated orientation thus appears to be the most stable arrangement of the peptide, at least at zero ionic strength and without taking account of possible peptide-peptide interactions.
机译：据信皮肤抗菌素家族Dermaseptins可通过形成与细胞膜结合的两亲性α螺旋来起作用，从而导致其通透性和破坏。描述了一种简单的平均场方法，用于模拟肽与脂质双层的相互作用，该方法包括双层头部组区域静电效应的近似表示。从PC磷脂双层的原子模型开始，我们计算沿双层法线的平均静电势。通过结合肽与这种静电势以及膜的疏水核的相互作用，我们得到的肽-双层能量学比单独使用侧链疏水性更完整。在青蛙皮肤肽dermaseptin B的MD模拟中使用这种相互作用潜能表明，脂质双层可稳定肽的α-螺旋构象。这与FTIR数据一致。因此，表面相关的取向似乎是肽的最稳定的排列，至少在零离子强度下并且没有考虑可能的肽-肽相互作用。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号