在阿斯基迪亚动物中,细胞质形态发生的分子控制
Maxence Lanoizelet1,2, Christel Elkhoury Youhanna3,4, Agnès Roure3
1Sorbonne Université, CNRS, Biologie Intégrative Des Organismes Marins (BIOM), Banyuls/Mer, 66650, France. maxence.lanoizelet@kuleuven.be.
BMC biology
|April 2, 2024
概括
长袍幼虫使用尾部表皮的图案,从它们的纤维素长袍中形成. 这项研究揭示了复杂的基因进化和调节形的过程,将水平转移的基因整合到发育网络中.
科学领域:
- 发展生物学 发展生物学
- 进化生物学 进化生物学
- 海洋生物学 海洋生物学
背景情况:
- 与脊椎动物密切相关的衣动物拥有独特的基于纤维素的外骨架,称为衣.
- 虫幼虫表现出状的特征,如一条记带和神经管,子分化为.
- 长袍是长袍动物的决定性特征,尽管一些物种失去了其他状动物的特征.
研究的目的:
- 为了研究控制3D形态生成的3D分子机制的 tunicate子,特别是翅膀形成在 ascidian幼虫.
- 了解尾部表皮在衣延长和翅膀发育中的作用.
- 探索涉及突尼克合成的水平转移基因 (CesA和Gh6) 的进化历史和调控作用.
主要方法:
- 实验是在虫Phallusia mammillata进行的.
- 使用BMP信号抑制和CRISPR/Cas9基因失活 (Msx,Klf1/2/4/17) 来研究表皮的模式.
- 对CesA (纤维素合成酶) 和Gh6 (纤维素酶) 的基因表达分析在不同的虫物种中进行.
- 功能性研究评估了Gh6在尾形成中的作用.
主要成果:
- 尾部表皮的中侧图案对于子延长成翅膀至关重要;破坏导致中端翅膀缺失.
- 转录因子Msx和Klf1/2/4/17参与确定尾部表皮中线标识的细发育.
- 从细菌中通过横向基因转移 (HGT) 获得的CesA和Gh6基因显示出动态的进化历史和突变性表达.
- 虽然Gh6在Phallusia表皮中区域表达,但其在尾形成中的功能较小.
结论:
- 这项研究促进了对水平转移的基因如何融入动物发育网络的理解.
- 它提供了洞察力,以纤维素为基础的外细胞材料的外细胞材料的形态发生.
- 这项研究突出了复杂的进化轨迹和调节机制,这些机制控制了这个族群中衣的形成.
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