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在翻译中丢失:尽管在foraminifera中极端的密码偏差,但保留了氨基酸的使用

Auden E Cote-L'Heureux¹, Elinor G Sterner¹, Xyrus X Maurer-Alcalá²

¹Department of Biological Sciences, Smith College, Northampton, Massachusetts, USA.

|March 5, 2025

概括

甲菌在DNA组成中表现出极端的变异,但保持了保存的氨基酸使用,挑战了进化模型. 这项研究揭示了这个古老的原生群体内基因组进化中的令人惊的模式.

科学领域:

* 进化生物学进化生物学
* 基因组学是一个学科.
* 分子进化过程中的分子进化.

背景情况:

*真核细胞的子使用通常反映了GC压力,影响了氨基酸频率.
*Foraminifera是一种古老而多样化的原生类,在很大程度上是无法培养的,这限制了基因组研究.
*以前对微生物真核生物的研究往往集中在模型生物体上,可能会忽视独特的进化模式.

研究的目的:

* 通过单细胞转录学和基因组学来调查子使用模式和虫中的组成偏差.
*分析核酸,和氨基酸组成在多种类型的类.
* 了解一种主要无法培养的真核细胞系中的基因组进化.

主要方法:

* 精选了来自1044个基因家族的数据,这些基因家族来自28个类动物的49个个体.
* 采用单细胞转录组学和基因组学分析.
*分析了四倍退化沉默部位的组合偏差和子使用情况.

主要成果:

*观察到GC含量的极端变化,一些物种在静音地点显示<3%GC,而其他物种显示>75%.
*在多样化,非单体的血统中发现了具有AT偏见的物种.
* 尽管构成分歧,但氨基酸的使用在所有分析的类动物中仍然高度保持.

结论:

* Foraminifera表现出一种独特的进化悖论:尽管核酸组成的极端变化,但氨基酸的使用高度保守.
*这些发现挑战了微生物真核生物分子进化的传统模型.
*动态的基因组结构,包括内复制和染色质挤出,可能有助于这些观察到的模式foraminifera.

关键词:

GC内容GC内容的内容氨基酸的使用氨基酸的使用.codon 的使用情况构成偏差是一种组成偏差.对于有信仰的人来说.

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