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相关概念视频

Ligand Binding Sites02:40

Ligand Binding Sites

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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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A High Throughput MHC II Binding Assay for Quantitative Analysis of Peptide Epitopes
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对MHC-I复合物的高特异性结合剂的设计

Bingxu Liu1,2, Nathan F Greenwood1,2, Julia E Bonzanini1,2,3

  • 1Department of Biochemistry, University of Washington, Seattle, WA, USA.

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概括

科学家通过识别特定的MHC-I (pMHCI) 复合体来设计针对病细胞的新型蛋白质. 这些工程结合剂在仿真抗原受体中使用时成功激活T细胞,显示出新的癌症疗法潜力.

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Immunopeptidomics: Isolation of Mouse and Human MHC Class I- and II-Associated Peptides for Mass Spectrometry Analysis
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科学领域:

  • 免疫学
  • 蛋白质工程
  • 计算生物学

背景情况:

  • 一级主要组织相容性复合物 (MHC-I) 分子呈现细胞内,用于免疫监测.
  • 针对疾病特异性MHC-I (pMHCI) 复合体提供治疗潜力.
  • 实现特异性需要识别与疾病相关的,同时避免无处不在的MHC相互作用.

研究的目的:

  • 为患病细胞设计具有高特异性的新型pMHCI结合蛋白.
  • 针对特定的pMHCI目标使用计算方法来设计蛋白质.
  • 验证设计的结合剂在T细胞激活中的治疗潜力.

主要方法:

  • 使用RF扩散,一种蛋白质设计算法,产生pMHCI结合剂.
  • 从实验或预测的pMHCI结构开始设计过程.
  • 用于功能测试的合成抗原受体 (CAR) 中的设计结合剂.

主要成果:

  • 成功确定了11种不同的目标pMHCI复合物的特定结合剂.
  • 设计表明与pMHCI的部分有广泛的接触.
  • 包含8种设计的结合剂的CARs通过特异性T细胞激活.

结论:

  • 开发的蛋白质设计方法可以有针对性地识别与疾病相关的pMHCI.
  • 设计的pMHCI结合剂显示出开发新型免疫疗法的前景.
  • 这一策略对于基于蛋白质和基于细胞的pMHCI向具有广泛的适用性.