在Camellia sinensis中的多氧化酶基因的Codon使用偏差:全面分析
1Department of Biology, Faculty of Arts and Sciences, Recep Tayyip Erdoğan University, 53100 Rize, Türkiye.
Plants (Basel, Switzerland)
|October 16, 2025
概括
这项研究揭示了茶叶多氧化酶 (PPO) 基因表现出弱码子使用偏差和低表达潜力,主要是由自然选择塑造的. 这些发现为茶叶PPO基因的异质表达提供了洞察力.
科学领域:
- 植物分子生物学 植物分子生物学
- 基因组学就是基因组学.
- 进化生物学 进化生物学
背景情况:
- 多氧化酶 (PPO) 是茶叶植物 (Camellia sinensis) 中的关键酶,影响新陈代谢和色.
- 的使用偏差 (CUB) 提供了对基因进化和功能的见解,但CsPPO基因的CUB模式以前没有被记录.
研究的目的:
- 在24个CsPPO基因中进行首次全面分析CUB.
- 将CsPPO CUB与其他Camellia和非Camellia物种进行比较,以了解进化关系和功能约束.
- 为了确定CsPPO基因异质表达的潜在宿主.
主要方法:
- 分析核酸组成和编码子使用指数 (RSCU,RFSC).
- 使用独立于长度和组成的测量 (MILC) 评估表达水平.
- 使用ENC-GC3s,PR2和中性图表对CUB的突变和选择力进行评估.
主要成果:
- CsPPO基因显示出富含AT的偏差,偏好G/C结尾的密码子.
- 在CsPPO基因中观察到低表达水平和弱CUB.
- 自然选择被确定为CsPPO基因中影响CUB的主导因素,比突变更重要.
结论:
- 在CsPPO基因中,Codon的使用主要是由自然选择形成的,表现出弱偏差和低表达潜力.
- 建议Zea mays作为适合CsPPO基因异质表达的宿主.
- 这些发现为未来的基因工程和茶叶PPO基因异质表达策略提供了宝贵的见解.
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