精确量化和合理调节蛋白质表达与双电磁带的精确量化和合理调节用于高效的生物素生产
Shun Li1, Xuan Zhou1, Ye Chen1
1School of Biotechnology and Key Laboratory of Industrial Biotechnology of Ministry of Education, Jiangnan University, 1800 Lihu Road, Wuxi, Jiangsu 214122, China.
Journal of agricultural and food chemistry
|March 5, 2025
概括
这项研究介绍了一种二基斯特龙设计 (BCD) 库,用于在微生物细胞工厂中高效的酶表达查. 这种定量策略优化了酶水平,显著提高了生物素的产量,高达3.03倍.
科学领域:
- 合成生物学 合成生物学
- 代谢工程是代谢工程.
- 生物技术是生物技术.
背景情况:
- 由于低于最佳的酶表达而导致的代谢失衡,阻碍了微生物细胞工厂中的向产品合成.
- 目前的酶表达查方法往往是试错的,限制了效率和适用性.
研究的目的:
- 开发一种定量和有效的策略,用于选微生物细胞工厂中的酶表达水平.
- 优化生物合成中限制速率酶BioB的表达,使用一种新的二基斯特龙设计 (BCD) 库.
主要方法:
- 开发一个二基斯特龙设计 (BCD) 库,使992倍的酶表达范围.
- 使用光强度与蛋白质丰度的相关性进行定量选 (r = 0.96).
- 两步选过程:表达式分析和集中选择,需要最小的测试.
主要成果:
- 鉴定不同遗传背景的最佳BCD强度 (BCD6和BCD7) (生物操作子与生物+ISC操作子).
- 通过优化菌株实现了1.47倍和3.03倍的生物素标位增加.
- 通过Western Blot分析证实了BioB蛋白丰度的显著增加 (2.38倍和2.71倍).
结论:
- 在微生物细胞工厂建设中,BCD库提供了一种多功能和合理的方法来调整酶表达.
- 这一策略克服了传统选方法的局限性,使得提高产品产量的高效优化成为可能.
- 为微调BioB表达而先进的BCD应用显著改善了生物素的产生,证明了其广泛的实用性.
相关概念视频
01:27Upstream Processing
Upstream processing represents a critical phase in biomanufacturing, wherein biological systems such as microorganisms, mammalian cells, or insect cells are cultivated to produce therapeutic proteins, vaccines, enzymes, or other biologically derived products. This phase encompasses all steps from the selection and genetic manipulation of the production organism to the cultivation of cells in bioreactors under tightly controlled environmental conditions.Host Selection and Genetic OptimizationThe...
01:30Production of Pharmaceuticals
Industrial insulin production uses genetically engineered E. coli expressing a proinsulin gene controlled by a tryptophan promoter and containing a methionine linker for later cleavage. The cells also carry ampicillin resistance for selective growth. Seed cultures are stored at −80 °C and production begins by thawing a small amount to inoculate starter cultures, which are progressively scaled to a 50,000-L bioreactor. In the bioreactor, E. coli grow in nutrient-rich media under sterile, tightly...