重组表达和净化TANB77衍生的皮林样蛋白935和938的重组表达和净化
Tham Truong Phuong Tran1, Linh Thanh Nguyen1, Byeong-Gu Han1
1Department of Nano-bioengineering, Incheon National University, Incheon, 22012 Republic of Korea.
Protein expression and purification
|February 3, 2026
概括
研究人员开发了一种新方法来产生TANB77类似皮林的蛋白质,这对于增强癌症免疫治疗至关重要. 这一突破促进了对这些蛋白质的进一步研究.
科学领域:
- 微生物学 微生物学
- 免疫学 免疫学 免疫学
- 生物化学 生物化学
背景情况:
- 肠道微生物群影响抗瘤免疫和癌症免疫疗法.
- 来自TANB77类的皮林类蛋白质显示出增强免疫检查点阻塞疗法的潜力.
- 目前缺乏这些蛋白质的重组生产协议.
研究的目的:
- 建立和优化一种用于重组表达和净化两个TANB77衍生型皮林样蛋白的方法,指定935和938.
- 描述935和938蛋白的表达特征和生物物理特性.
- 为未来研究这些蛋白质在癌症免疫治疗中的治疗潜力提供框架.
主要方法:
- 使用大肠杆菌 (E. coli) BL21(DE3) /pET系统进行蛋白质表达.
- 实现了优化的表达条件.
- 采用了两步净化策略,包括Ni-NTA亲和染色学和尺寸排除染色学 (SEC),然后进行内毒素去除.
主要成果:
- 成功开发了一种可复制的工作流程,用于生产 TANB77 类似柱状蛋白质.
- 蛋白935在高产量 (∼2.5毫克/100毫升) 中得到表达,并显示出稳定的寡合化.
- 蛋白938的产量显著降低 (∼0.08毫克/100毫升),并且具有相当大的碎片化,这表明其内在的不稳定性.
结论:
- 介绍了第一个优化协议,用于TANB77的重组生成皮林类蛋白935和938.
- 突出了蛋白质935和938之间的明显表达和稳定性差异.
- 已建立的框架允许进一步研究这些蛋白质用于癌症免疫疗法应用.
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