首页> 外文期刊>Journal of Molecular Biology >Enhancing the contrast of ApoB to locate the surface components in the 3D density map of human LDL.
【24h】

Enhancing the contrast of ApoB to locate the surface components in the 3D density map of human LDL.

机译:增强ApoB的对比度,以在人LDL的3D密度图中定位表面成分。

获取原文
获取原文并翻译 | 示例
           

摘要

A 26 A resolution map of the structure of human low-density lipoprotein (LDL) was obtained from electron cryomicroscopy and single-particle image reconstruction. The structure showed a discoidal-shaped LDL particle with high-density regions mainly distributed at the edge of the particle and low-density regions at the flat surface that covers the core region. To determine the chemical components that correspond to these density regions and to delineate the distribution of protein and phospholipid located at the particle surface at the resolution of the map, we used Mono-Sulfo-NHS-Undecagold labeling to increase preferentially the contrast of the apolipoprotein B component on the LDL particle. In the three-dimensional map from the image reconstruction of the undecagold-labeled LDL particles, the high-density region from the undecagold label was distributed mainly at the edge of the particle, and lower density regions were found at the flat surfaces that cover the neutral lipid core. This suggests that apolipoprotein B mainly encircles LDL at the edge of the particle and the phospholipid monolayers are located at the flat surfaces, which are parallel to the cholesterol ester layers in the core and may interact with the core lipid layers through the acyl chains.
机译:通过电子冷冻显微镜和单颗粒图像重建获得了人低密度脂蛋白(LDL)结构的26 A分辨率图。该结构显示出盘状LDL粒子,其高密度区域主要分布在粒子的边缘,而低密度区域分布在覆盖核心区域的平面上。为了确定与这些密度区域相对应的化学成分,并在图的分辨率下描绘位于颗粒表面的蛋白质和磷脂的分布,我们使用了单磺基-NHS-十一碳标记来优先增加载脂蛋白的对比度LDL粒子上的B成分。在未经十足金标记的LDL粒子的图像重建的三维图中,来自未十足金标记的高密度区域主要分布在粒子的边缘,而低密度区域则在覆盖LDL粒子的平面上发现。中性脂质核心。这表明载脂蛋白B主要在颗粒边缘环绕LDL,而磷脂单层位于平面上,该平面与核心中的胆固醇酯层平行,并可能通过酰基链与核心脂质层相互作用。

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