通过基因组,结构和表达分析重新定义Ciona robusta中类似收费的受体谱
Akira Shiraishi1, Shin Matsubara1, Sakura Kikuchi2,3
1Bioorganic Research Institute, Suntory Foundation for Life Sciences, Kyoto, Japan.
Frontiers in cellular and infection microbiology
|January 22, 2026
概括
这项研究将Ciona中的托尔类受体 (TLRs) 的谱系修订为三种真正的基因 (CiTLR1,CiTLR2,CiTLRs1). 它强调了结构和功能验证的重要性,超越了序列同质性,以准确识别免疫基因.
科学领域:
- 无脊椎动物免疫学 无脊椎动物免疫学
- 天生的免疫机制天生的免疫机制.
- 免疫基因的分子进化
背景情况:
- 收费类受体 (TLRs) 对于先天免疫至关重要,识别病原体相关的分子模式 (PAMPs).
- 罗布斯塔的基因组包含注释的TLRs (CiTLR1,CiTLR2) 和假定的TLR类基因 (TLR3, -4, -6, -7, -13).
- 这些Ciona类TLR基因的真实性需要进一步的结构和功能验证.
研究的目的:
- 系统地重新分析Ciona基因组的真实托尔类受体 (TLR).
- 验证Ciona中注释的TLR和TLR类基因的结构和功能特征.
- 改进对TLR谱系和ascidians中的免疫基因多样性的理解.
主要方法:
- 使用最新的Ciona组件 (HT基因组) 重新分析基因组.
- 域预测和三维结构建模 (AlphaFold3).
- 转录表达在不同的组织中进行剖析.
主要成果:
- TLR13与CiTLR1完全相同;TLR3, -6,和 -7缺乏完整的Toll/互白素-1受体 (TIR) 域,并且不是正规的TLRs.
- 一个新的TLR基因CiTLRs1被确定,它编码了富含白的重复 (LRR) 和TIR域.
- 结构建模证实了CiTLR1,CiTLR2和CiTLRs1的正规折叠;转录组学揭示了不同的表达模式.
结论:
- 在Ciona中真正的TLR曲目被修改为三个基因:CiTLR1,CiTLR2和CiTLRs1.
- 仅基于序列同质性的TLR多样性的过高估计是值得注意的,强调域和功能验证.
- 这项研究提供了一个精细的 ascidian TLRs 的结构和功能景观,推进先天免疫研究.
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