工程 CCL2 化学基因单体的结构-动力学-功能关系的NMR阐明
Deepak Kumar Tripathi1, Khushboo Gulati1, Siddhartha Das Pramanik1
1Department of Biosciences and Bioengineering, Indian Institute of Technology Roorkee, Roorkee, Uttarakhand, India.
设计的单体单细胞化学吸引蛋白-1 (CCL2-M) 呈现出与其二维形式 (CCL2-WT) 不同的结构动态和稳定性. 尽管稳定性较低,但CCL2-M有效诱导单细胞迁移,类似于CCL2-WT.
科学领域:
- 生物化学 生化学
- 分子生物学分子生物学
- 免疫学 免疫学 免疫学
背景情况:
- 单细胞化学吸引蛋白-1 (CCL2) 调节单细胞迁移到炎症部位.
- 在生理条件下,CCL2存在单体和二元形式之间的平衡状态.
- 了解CCL2单体和双体之间的结构和功能差异对于药物发现至关重要.
研究的目的:
- 为了比较工程化小鼠CCL2单体 (CCL2-M) 与野生型CCL2二分体 (CCL2-WT) 的结构,稳定性和功能.
- 阐明CCL2单体的结构动态和原始状态的性.
- 为了研究CCL2单体在单细胞/巨细胞迁移中的化疗活性.
主要方法:
- 核磁共振 (NMR) 光谱用于分配和结构特征.
- 生物物理技术,包括原始状态交换,以评估稳定性和动态.
- 基于细胞的跨井迁移测试以评估化学作用的功能.
主要成果:
- CCL2-M的整体拓与CCL2-WT的单体子单元相似.
- 与CCL2二次体相比,CCL2-M表现出广泛的形状波动和较少的原生状态性.
- 原始状态交换表明CCL2单体的稳定性低于二元体.
- CCL2单体诱导单细胞/巨细胞的化学转移,与CCL2二元体相比较.
结论:
- 工程CCL2单体具有独特的结构动力学和较其二维对应物低的稳定性.
- 尽管存在稳定性差异,但CCL2单体保留了单细胞/巨细胞的功能化疗活性.
- 这些发现为基于结构的药物发现提供了基础,针对CCL2-CCR2轴.
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