在大规模生产烟草蚀刻病毒蛋白酶的改进
Simon Messing1, Kirsten Barnhart1, Matthew Drew1
1Protein Expression Laboratory, NCI RAS Initiative, Frederick National Laboratory for Cancer Research, Frederick, MD, 21702, USA.
Protein expression and purification
|December 16, 2024
概括
我们优化了烟草蚀刻病毒 (TEV) 蛋白酶的大规模生产,这是蛋白质净化的关键酶. 我们的方法产生高纯度的TEV蛋白酶,克服了翻译后修改等挑战.
科学领域:
- 生物化学 生化学
- 分子生物学分子生物学
- 蛋白质表达方式
背景情况:
- 烟草蚀刻病毒 (TEV) 蛋白酶对于裂解蛋白质表达中的融合标签至关重要.
- 它的序列特异性和实用性使其成为分子生物学实验室中宝贵的工具.
- 大规模生产和纯度方面的挑战影响了其广泛应用.
研究的目的:
- 为了优化TEV蛋白酶的大规模生产.
- 调查和减轻影响TEV蛋白酶纯度的翻译后修改.
- 为TEV蛋白酶生产和活性测量开发高效的协议和测试.
主要方法:
- 探索各种促进剂,介质,融合标签和TEV蛋白酶生产的表达平台.
- 鉴定和表征葡萄糖基和糖基转化后的修饰.
- 开发一种修改后的细菌菌株 (pgl plus) 来抵消这些修改.
- 建立基于GFP的测定方法来测量TEV蛋白酶活性.
主要成果:
- 在优化条件下成功大规模生产TEV蛋白酶.
- 证明翻译后的修改会对蛋白质纯度产生负面影响.
- 验证pgl加菌株用于生产未经修改的高纯度TEV蛋白酶.
- 开发产生400-500 mg/L活性TEV蛋白酶的协议.
结论:
- 优化协议和修改后的细菌菌株显著提高了TEV蛋白酶生产产量和纯度.
- 了解和控制翻译后修改对于获得高质量的重组蛋白质至关重要.
- 开发的基于GFP的测定方法为评估TEV蛋白酶活性提供了可靠的方法.
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