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相关概念视频

Ligand Binding Sites02:40

Ligand Binding Sites

Proteins are dynamic macromolecules that carry out a wide variety of essential processes; however, the activities of most proteins depend on their interactions with other molecules or ions, known as ligands.
Protein-ligand interactions are quite specific; even though numerous potential ligands surround a cellular protein at any given time, only a particular ligand can bind to that protein. Moreover, a ligand binds only to a dedicated area on the surface of the protein, known as the...
Ligand Binding Sites02:40

Ligand Binding Sites

Proteins are dynamic macromolecules that carry out a wide variety of essential processes; however, the activities of most proteins depend on their interactions with other molecules or ions, known as ligands.
Protein-ligand interactions are quite specific; even though numerous potential ligands surround a cellular protein at any given time, only a particular ligand can bind to that protein. Moreover, a ligand binds only to a dedicated area on the surface of the protein, known as the...

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CS-35的联体特异性,一种识别菌根菌的单克隆抗体 lipoarabinomannan:一个模型系统的Oligofuranoside-蛋白质识别.

Christoph Rademacher1, Glen K Shoemaker, Hyo-Sun Kim

  • 1Institute of Chemistry, University of Lübeck, Ratzeburger Allee 160, 23538 Lübeck, Germany.

Journal of the American Chemical Society
|August 4, 2007
PubMed
概括

CS-35抗体识别了真菌细菌细胞壁中的四糖 (四糖) 结构. 这一D-阿拉比诺酸链两端的特定糖残留对抗体的强度结合至关重要.

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科学领域:

  • 碳水化合物的化学成分
  • 免疫学 免疫学 免疫学
  • 结构生物学是结构生物学.

背景情况:

  • CS-35抗体对于识别含有D-阿拉比诺的糖至关重要,这种糖在真菌菌细胞壁中很常见.
  • 了解CS-35结合是表征重要的含有阿拉比诺的葡萄糖结合物的关键.
  • 研究这种相互作用为我们提供了关于蛋白质如何结合含素的寡糖的见解,这是一个鲜为人知的领域.

研究的目的:

  • 阐明CS-35抗体的结合部位,并量化其与配体的相互作用.
  • 了解碳水化合物与蛋白质相互作用的结构基础,其中包括 furanose 环.
  • 使用CS-35.5来描述含有阿拉比诺的糖结合物.

主要方法:

  • 连接物的化学合成.
  • 质谱仪用于结构分析.
  • 定位微热量计用于测量结合亲和力.
  • 核磁共振 (NMR) 光谱仪用于详细的结构洞察.

主要成果:

  • 由CS-35识别的最小表位是线性四糖.
  • 寡糖的减少和非减少的末端残留物对于高亲缘关系结合至关重要.
  • 非减少的末端残留物结合在一个异形口袋中,而其他糖与芳香氨基酸相互作用.

结论:

  • 该研究定义了用于CS-35抗体识别的最小结合表位和关键结构特征.
  • 这项工作提供了一个详细的模型,说明CS-35如何与含有D-阿拉比诺富拉诺的甘氨酸相互作用.
  • 这些发现有助于对菌根细菌的甘氨酸和 furanose-oligosaccharide 识别机制的表征.