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Designing Silk-silk Protein Alloy Materials for Biomedical Applications
Published on: August 13, 2014
对于一个分子内蛋白质-连接体系统,有效的度取决于链接体的长度
Vijay M Krishnamurthy1, Vincent Semetey, Paul J Bracher
1Department of Chemistry and Chemical Biology, Harvard University, 12 Oxford Street, Cambridge, Massachusetts 02138, USA.
Journal of the American Chemical Society
|February 1, 2007
概括
这项研究研究了脂乙烯糖醇 (EGn) 连接器长度如何影响连接蛋白与蛋白质的结合. 最佳结合发生在特定的链接器长度,随着链接器变长,结合强度下降,这表明性贡献是关键.
科学领域:
- 生物化学 生物化学
- 聚合物科学 聚合物科学
- 分子生物物理学 分子生物物理学
背景情况:
- 了解分子内结合对于设计向疗法至关重要.
- 奥利戈乙烯甘醇 (EGn) 连接剂被广泛用于将连接物连接到蛋白质上.
- 连接器长度对结合热力学的影响需要进一步研究.
研究的目的:
- 用不同长度的EG (n) 连接器来实验确定连接蛋白与连接蛋白结合的解离常数和有效度 (M(eff)).
- 将实验结果与聚合物理论的理论预测进行比较.
- 阐明链接器对结合亲和力的热力学贡献.
主要方法:
- 通过EG (n) 连接器 (n=0,2,5,10,20) 将一个连接体对蛋白质表面进行共价附着.
- 测量解离常数和有效度 (M(eff)).
- 热量测量以评估体贡献.
- 与随机卷轴聚合物模型的比较.
主要成果:
- 有效度 (M(eff)) 在最佳链接器长度 (n=2) 中最高,并且随着长度的增加而下降.
- 实验结果与链接器的随机线圈聚合物模型保持一致.
- 结合的热力学主要由性因素控制,链接器的性贡献最小.
结论:
- 连接器长度显著影响分子内结合亲和力,具有最大结合的最佳长度.
- 链接体-蛋白相互作用的性性质表明,灵活的链接体对于有效的多价值连接体设计至关重要.
- 有效度 (M(eff)) 可以预测多价值联体的度,指导开发新型治疗剂.
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