突发序列中的特定核酸替代增强了alphabaculoviruses中的多面体表达:改善了baculovirus表达载体
Susumu Katsuma1, Koshi Fukaura1, Noriko Matsuda-Imai1
1Department of Agricultural and Environmental Biology, Graduate School of Agricultural and Life Sciences, The University of Tokyo, Tokyo, Japan.
Applied and environmental microbiology
|April 7, 2025
概括
在baculovirus多面体 (POLH) 基因中的特定突变.
科学领域:
- 分子生物学分子生物学
- 病毒学 病毒学
- 生物技术是生物技术.
背景情况:
- 众所周知,αbaculoviruses产生了许多主要由多面体 (POLH) 组成的闭塞体 (OB).
- 波尔赫基因的高水平转录对OB产生至关重要,并且已被用于baculovirus表达载体系统 (BEVS).
- 波尔赫基因内的突破序列对于其超转录至关重要,但其精确的调节元素尚未完全理解.
研究的目的:
- 为了研究在POLH基因爆发序列中的A丰富区域的作用.
- 通过使用BEVS.来识别可以增强POLH表达的特定突变,以改善外来蛋白质的产生.
主要方法:
- 在爆发序列的A丰富区域中产生具有A-到-T替代的Bombyx mori核多重体病毒 (BmNPV) 突变.
- 对突变病毒中POLH促销器驱动的记者基因表达的分析.
- 在Autographa californica多重核聚合体病毒 (AcMNPV) 载体系统中对突变的评估.
- 在受感染细胞中量化POLH mRNA和蛋白质水平.
主要成果:
- 在POLH上游区域的位置 -16到 -14的三重A到T突变 (TTT) 显著增加了记者基因表达的4到5倍.
- 在这些位置的单个和双个A-to-T突变显示出较小但显著的影响.
- 在BmNPV和AcMNPV系统中,TTT突变增强了POLH表达.
- 这种突变还增加了OB产生的病毒中POLH mRNA和蛋白质的积累.
结论:
- 在baculovirus爆发序列中的特定核酸替代可以显著增强POLH基因转录.
- 在POLH上游区域的 -16至 -14位置的三重TTT突变特别有效地促进表达.
- 这些发现提供了一种简单的方法来改善baculovirus表达载体系统中的外来蛋白质产量.
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