在基于SHAPE实验的潮间牛中探索mRNA的二次结构对温度的适应性
Ya-Jie Zhu1, Ming-Ling Liao1, Yun-Wei Dong1
1The Key Laboratory of Mariculture, Ministry of Education, Fisheries College, Ocean University of China, Qingdao 266003, PR China.
The Journal of experimental biology
|September 28, 2023
概括
潮间牛表现出明显的RNA结构稳定性差异,影响它们适应不同温度的能力. 这些RNA适应可能解释了沿海岸的牛物种分布的变化.
科学领域:
- 海洋生物学 海洋生物学
- 分子生物学分子生物学
- 生态生态学 生态生态学
背景情况:
- 潮间物种面临温度波动,需要热适应策略.
- 虽然生理适应已知,但潮间物种的RNA级热适应仍未得到充分研究.
- 细胞质酸脱酶 (cMDH) mRNA对于细胞能量代谢至关重要.
研究的目的:
- 为了研究mRNA结构稳定性和潮间牛的物种分布之间的关系.
- 确定cMDHmRNA的二次结构和热稳定性在三个关键的潮间牛物种中.
- 探索RNA结构变化如何与温度相关,并可能影响物种的地理范围.
主要方法:
- 通过初始扩展 (SHAPE) 分析的选择性2'-基化被用于确定mRNA二次结构.
- 形成的折叠自由能量 (ΔGfold) 的变化被计算为量化mRNA的结构稳定性.
- 在不同温度下进行了ΔGfold,ΔΔGfold和结构参数 (茎,环) 的跨种类比较.
主要成果:
- 在所有三种物种中,mRNA结构稳定性 (ΔGfold) 随着温度的增加而增加.
- 在 ΔΔGfold 中观察到显著的跨物种差异,Echinolittorina malaccana 显示较低的值.
- 温度的增加减少了mRNA茎和循环的数量,同时增加了循环长度,E. malaccana表现出最高的断点温度.
结论:
- 在潮间牛中存在RNA二级结构热稳定性的跨物种变异.
- 这些基于RNA的热适应可能在这些物种的分布模式中发挥作用.
- 在cMDH mRNA中的结构变化可能会影响翻译效率,从而有助于热耐受性.
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