酵母中的Codon使用偏差及其与基因表达,生长温度和蛋白质结构的相关性
Marcelo Baeza1, Dionisia Sepulveda2, Víctor Cifuentes1
1Departamento de Ciencias Ecológicas, Facultad de Ciencias, Universidad de Chile, Santiago, Chile.
Frontiers in microbiology
|July 23, 2024
概括
酵母中的使用偏差 (CUB) 与基因表达和蛋白质功能相关,而不是最佳生长温度. 首选的编码子调节蛋白质合成,以获得最佳的折叠和功能.
科学领域:
- 微生物学 微生物学
- 分子生物学分子生物学
- 遗传学 遗传学 是一个
背景情况:
- 子使用偏差 (CUB) 在各种生命形式中观察到,并受到温度和基因表达等因素的影响.
- 之前的CUB研究集中在细菌和更高的真核生物上,结果各不相同.
- 了解酵母中的CUB为进化适应和基因调节提供了洞察力.
研究的目的:
- 在来自不同环境的酵母中分析CUB.
- 评估CUB与最佳生长温度 (OTG),基因表达和蛋白质特征的相关性.
- 研究CUB在蛋白质折叠和合成调节中的作用.
主要方法:
- 在酵母分离物中对CUB进行比较分析.
- 在CUB,OTG和基因表达水平之间的相关性分析.
- 检查与蛋白质结构和细胞功能相关的编码子分布.
主要成果:
- 高表达的ORF在酵母物种内和酵母物种之间表现出类似的CUB.
- 在C和基因表达水平之间发现了直接的相关性.
- CUB与OTG的对应性很低,观察到一些反向相关性.
- 根据CUB的酵母聚类部分与OTG保持一致,特别是在较低的OTG酵母中.
- 在ORF 5'端的偏好色素较少,在β链区域更高,在翻译和能量代谢途径上更丰富,特别是在高度表达的ORF中.
结论:
- 酵母中的CUB主要与基因表达和蛋白质功能有关,而不是最佳生长温度.
- 沿着mRNA的偏好和非偏好子的分布调节了蛋白质合成速率,这对于蛋白质折叠和功能至关重要.
- 在需要酵母快速合成蛋白质的条件下,这种调节机制尤其重要.
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