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海基因组中的拓结构和合成保护
Bob Zimmermann1,2, Juan D Montenegro1,2, Sofia M C Robb3
1Department of Neurosciences and Developmental Biology, Faculty of Life Sciences, University of Vienna, Djerassiplatz 1, 1030, Vienna, Austria.
Nature communications
|December 13, 2023
概括
早期动物的基因组进化还不清楚. 安索索类类动物显示保存的染色体和基因集群,这表明复杂的基因调节在类动物和双胞胎分裂后进化.
科学领域:
- 基因组学就是基因组学.
- 进化生物学 进化生物学
- 进行比较基因组学.
背景情况:
- 在早期分支动物中对基因集群,基因组架构和型进化的理解有限.
- 安索索类类动物由于其缓慢的进化速率提供了洞察力.
- 在进化基因组研究中专注于海Nematostella vectensis和Scolanthus callimorphus.
研究的目的:
- 通过使用染色体水平组件,研究早期分支动物的基因组进化.
- 为了重建祖先的 cnidarian 和 metazoan 染色体块.
- 了解基因集群的进化和长距离基因调节.
主要方法:
- 染色体层次的基因组组合Nematostella vectensis和Scolanthus callimorphus. 这两种植物.
- 对比基因组分析以确定染色体的保存.
- 祖先链接组和染色体块的重建.
主要成果:
- 确定了15个保存的染色体,在两种物种之间存在一对一的对应.
- 重建了至少19个祖先的类动物和16个祖先的甲类动物链接群.
- 在类动物中观察到大部分解体的Hox和NK集群,与 Bilateria形成鲜明对比.
- 没有发现证据表明在cnidarian基因组中存在拓相关的域.
- 建议较短的 cis-regulatory 距离可能会促进微聚合物损失.
结论:
- 安索索的基因组表现出显著的染色体保护,有助于重建祖先状态.
- 类动物的Hox和NK基因集群分解表明,与双边动物相比,基因组织存在差异.
- 缺乏拓相关的域表明3D基因组架构进化中的差异.
- 复杂的,高阶基因调节和3D架构很可能是在鱼-双星分裂后演变的.
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