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调控特征决定了植物中横向获得的基因的进化命运
Catherine F Collins1, Benjamin T Alston1, Samuel G S Hibdige1,2
1Ecology and Evolutionary Biology, School of Biosciences, University of Sheffield, Western Bank, Sheffield S10 2TN, UK.
Molecular biology and evolution
|February 28, 2026
概括
草种中的侧向基因转移 (LGT) 显示大多数基因降解. 然而,能够调节自身表达的基因更有可能持续存在并推动进化创新.
科学领域:
- 基因组学就是基因组学.
- 进化生物学 进化生物学
- 分子生物学分子生物学
背景情况:
- 侧向基因转移 (LGT) 是真核生物的一个重要的进化力量,有助于适应和创新.
- 影响LGT获取基因在动物和植物基因组中的整合和长期保留的因素尚不清楚.
- 草Alloteropsis通过LGT表现出高基因周转率,使其成为研究基因持久性的模型.
研究的目的:
- 研究促进草Alloteropsis中横向转移基因长期持久性的因素.
- 了解横向获得的基因退化和保留背后的机制.
- 确定与成功的LGT相关的基因组和基于表达的特征.
主要方法:
- 整合表达,甲基化和基因组数据分析.
- 对横向获得的基因与垂直继承的同类基因进行比较分析.
- 在转移的基因中评估序列切断和DNA甲基化水平.
主要成果:
- 大多数LGT获得的基因在Alloteropsis退化,表现出较低的表达和较高的序列截断与同类相比.
- 退化基因显示DNA甲基化增加,这表明转录沉默.
- 假定功能性LGT基因显示的表达模式更类似于它们的捐赠者正义基因,由内在的cis-regulatory元素促进.
结论:
- 大多数横向转移的基因在接受者基因组中随着时间的推移而降解.
- 转移基因调节自身表达的能力对于它们的长期持久性至关重要.
- 自律的LGT更有可能为进化新性和创新做出贡献.
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