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Updated: Jul 4, 2025

Identifying Amino Acid Overproducers Using Rare-Codon-Rich Markers

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Published on: June 24, 2019

改变P. pastoris基因组的编码偏差,以克服编码优化策略开发中的瓶,并改善蛋白质表达

Siyu Zhang¹, Ru Lin¹, Luyao Cui¹

¹State Key Laboratory of Bioreactor Engineering, East China University of Science and Technology, Shanghai 200237, China.

Microbiological research

|February 8, 2024

概括

子偏差调节了mRNA水平. 在Pichia pastoris中,一种新的GC倾向的密码子优化策略和tRNA工程可以将蛋白质产量提高4-5倍,克服传统方法的局限性.

科学领域:

分子生物学分子生物学
生物技术是生物技术.
合成生物学合成生物学

背景情况:

带偏差显著影响mRNA水平和蛋白质表达.
传统的基于频率的编码子优化在Pichia pastoris中效果不佳,因为它具有丰富的AU首选编码子,导致转录问题.
这就需要采用替代策略,在P. pastoris.中有效地表达异质蛋白质.

研究的目的:

为Pichia pastoris. 开发一种替代的编码子优化策略.
增强mRNA稳定性,减少P. pastoris.中过早的转录终止.
为了提高P. pastoris.中异质蛋白的产量.

主要方法:

研究了使用P. pastoris.中的三种记者基因进行GC倾向的密码体优化.
通过引入额外的罕见tRNA基因副本来改造P. pastoris.
构建了IPTG可诱导的tRNA基因,以动态调节编码子偏差.

主要成果:

GC倾向的编码子优化在P. pastoris.中显示了mRNA水平的显著优势.
经过工程设计的底盘细胞具有改变的编码子偏差配置,显示蛋白质产量增加.
报告者基因表达 (luc和0788) 在改性P. pastoris.中增加了4-5倍.

结论:

一种基于GC易受影响的代码子的替代代码子优化策略对P. pastoris.有效.
tRNA基因增强和诱导性表达为编码子偏差工程提供了一种多功能方法.
这项研究提供了一种新的方法来增强酵母宿主中异质蛋白质的产生.

关键词:

底盘细胞是底盘细胞.在Codon优化优化中.这就是Pichia pastoris.蛋白质表达方式蛋白质表达方式

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