表达,净化和结晶的Vγ9Vδ2 T细胞受体识别蛋白质/抗原的表达,净化和结晶
Chaofei Cheng1,2,3, Zhendong Zhao4,5, Guangzhi Liu6,7
1Stem Cell Research Center, Henan Key Laboratory of Stem Cell Differentiation and Modification, Henan Provincial People's Hospital, People's Hospital of Zhengzhou University, Zhengzhou, 450003, China.
The protein journal
|August 24, 2023
概括
研究人员开发了一种表达和净化Vγ9Vδ2T细胞受体 (TCRs) 的方法,这对于识别菌根抗原至关重要. 这一突破有助于了解对结核病的免疫反应和潜在的临床应用.
科学领域:
- 免疫学 免疫学 免疫学
- 结构生物学 结构生物学
- 微生物学 微生物学
背景情况:
- 马三角 (γδ) T 细胞,特别是 Vγ9Vδ2 T 细胞,对于对抗菌根菌感染至关重要.
- 这些T细胞识别了菌根细菌的抗原,可能触发了保护性免疫力.
研究的目的:
- 阐明Vγ9Vδ2 T细胞受体 (TCR) 识别菌根抗原的结构基础.
- 为结构研究建立一种可靠的表达和净化Vγ9Vδ2 TCR的方法.
主要方法:
- 对Vγ9Vδ2 TCR的原生生物和细菌病毒表达系统的探索,取得了有限的成功.
- 优化哺乳动物细胞表达系统以产生可溶性Vγ9Vδ2 TCR异构体.
- 应用降温栽培 (冷冲击) 来提高复合TCR产量.
- 净化复合Vγ9Vδ2 TCR,用于随后的结晶试验.
主要成果:
- 在传统系统中,Vγ9Vδ2 TCR表达具有挑战性,但在哺乳动物细胞中作为可溶性异构分子成功.
- 冷冲击培养显著提高了复合Vγ9Vδ2 TCR的产量.
- 从纯化的Vγ9Vδ2 TCR中获得了适合X射线衍射的晶体.
结论:
- 已经建立了一个强大的Vγ9Vδ2 TCR表达和净化协议.
- 这种方法促进了对Vγ9Vδ2TCR-抗原相互作用的结构研究,这对于理解菌根免疫至关重要.
- 已建立的程序对未来的基础研究和潜在的临床应用在诊断或治疗菌根菌感染方面充满希望.
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