对异构体的研究揭示了关于恐龙体进化的新见解
Elizabeth C Cooney1, Corey C Holt1, Elisabeth Hehenberger2
1Department of Botany, University of British Columbia, 3156-6270 University Blvd., Vancouver, BC V6T 1Z4, Canada; Hakai Institute, 1747 Hyacinthe Bay Rd., Heriot Bay, BC V0P 1H0, Canada.
Molecular phylogenetics and evolution
|April 27, 2024
概括
恐龙鞭状动物表现出独特的特征,如巨大的基因组和复杂的光生物学. 这项研究使用单细胞转录组学揭示了至少21个独立的光合作用损失和对基因获取的新见解.
科学领域:
- 海洋生物学 海洋生物学
- 亲生组织学 亲生组织学 亲生组织学
- 进化生物学 进化生物学
背景情况:
- 丁诺鞭状动物是具有独特基因组和光生物学特征的生态重要原生体.
- 现有的分子数据偏向光合作用物种,阻碍了进化研究.
- 了解恐龙状动物的基因是解释它们多样性特征的演变至关重要的.
研究的目的:
- 通过单细胞转录学来扩大异构性恐龙鞭状体的分子数据.
- 为了重建一个更平衡的类遗传代表的dinoflagellate血统.
- 为了研究光合作用,基因获取和染色质包装在dinoflagellates的进化.
主要方法:
- 从萨利什海中分离出个别的恐龙鞭状细胞.
- 应用单细胞,无培养的转录组学来生成分子数据.
- 对染色体包装,塑功能和光活性所涉及的蛋白质进行全面的生物信息学搜索.
主要成果:
- 光合作用已经至少失去了21次独立.
- 通过横向基因转移,同时获得两种类型的基因样蛋白 (HLPs).
- 多个罗多普辛多次从不同的细菌捐赠者获得.
- 克莱普托塑料恐龙鞭状动物拥有来自各种血统的塑性蛋白质的核编码基因.
- 华诺维类动物是唯一保留完整光系统的异质动物,尽管相关基因在其他异质动物中存在.
结论:
- 这项研究通过包括代表性不足的异性属种类,提供了更全面的恐龙鞭状动物进化的观点.
- 横向基因转移在恐龙的进化中发挥了重要作用,特别是在获得HLPs和Rhodopsins方面.
- 进一步阐明了恐龙鞭毛动物光合作用的复杂进化历史,揭示了许多损失和收益.
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