对平面基因组的比较分析揭示了面对快速结构分歧的调节性保护
Mario Ivanković1, Jeremias N Brand1, Luca Pandolfini2
1Department of Tissue Dynamics and Regeneration, Max Planck Institute for Multidisciplinary Sciences, Göttingen, Germany.
Nature communications
|September 18, 2024
概括
研究人员组装了平面 Schmidtea mediterranea 和亲属的高质量基因组. 这为研究再生提供了至关重要的资源,并为平虫基因组进化和染色体重排提供了洞察力.
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:
- 平面 Schmidtea mediterranea 是再生研究的一个关键模型生物.
- 在平面生物中基因组组装带来了重大挑战,阻碍了全面的遗传研究.
研究的目的:
- 为 Schmidtea mediterranea 的性 S2 菌株生成一个高质量的,分类组型阶段的,染色体规模的基因组组.
- 为三个密切相关的物种生产染色体规模的基因组组件:S. polychroa,S. nova和S. lugubris.
- 为平面基因组的进化提供一个比较的基因组视角.
主要方法:
- 混合基因注释用于准确的基因识别.
- 优化的ATAC-seq和ChIP-seq协议被用于监管元素注释.
- 对新组装的基因组进行了比较基因组分析.
主要成果:
- 在四种 Schmidtea 种类中成功生成了高质量的染色体规模的基因组组件.
- 分析显示,物种之间的蛋白质编码序列和调节区域存在显著差异.
- 在促进者和增强者区域内确定了保存的元素.
- 在Schmidtea属内观察到频繁的与逆转移素相关的染色体逆转变和转位.
- 在Schmidtea和其他平虫群体中发现了祖先甲动物合成的独立和近乎完全的损失.
结论:
- 产生的基因组组合为平面研究社区提供了宝贵的资源.
- 平面基因组在编码和调控序列中表现出相当大的进化分歧.
- 形虫基因组显示出一种非凡的进化能力,独立于祖先的合成约束.
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