罗纪NLR:非典型的古代免疫受体ZAR1的保存和动态进化特征
Hiroaki Adachi1,2,3, Toshiyuki Sakai1,2, Jiorgos Kourelis1
1The Sainsbury Laboratory, University of East Anglia, Norwich Research Park, Norwich NR4 7UH, UK.
植物免疫受体ZAR1是一种古老且保存的核酸结合蛋白,富含氨酸的重复 (NLR) 蛋白. 它的早期进化涉及与类似受体的细胞质激酶 (RLCKs) 合作,以激活植物的防御反应.
科学领域:
- 植物免疫学 植物免疫学
- 进化生物学是进化的生物学.
- 分子遗传学 分子遗传学
背景情况:
- 植物免疫受体,特别是核酸结合性氨酸丰富的重复 (NLR) 蛋白质,通常迅速演变.
- 霍普兹激活抵抗1 (ZAR1) 受体是一个例外,在植物系中显示出异常的保护性.
研究的目的:
- 为了重建ZAR1 NLR受体的进化历史.
- 研究ZAR1及其相互作用伙伴的保护和功能进化.
- 确定ZAR1.1.的新型分子特征和进化轨迹.
主要方法:
- 代序列相似性搜索 代序列相似性搜索
- 人类遗传学分析
- 功能重建ZAR1和RLCK活动的功能重建.
- 奥尔托洛格序列分析分析
主要成果:
- 扎尔1起源于2亿到1.5亿年前的早期开花植物,在88个物种中有120个正义基因.
- 确定了用于效应因子识别和细胞死亡激活的高度保存的功能区域.
- 在功能上,ZAR1与类似受体的细胞质激酶 (RLCKs) 建立了合作伙伴关系,这种相互作用是在其演化早期建立的.
- 新的特征包括一些物种的C-终端硫素类域和重复成具有明显进化路径的相似家族.
- 与其他血管精子NLR相比,ZAR1的重复性有限,但导致了非正规的NLR.
结论:
- ZAR1是一种古老的,保存的NLR免疫受体,具有深刻的进化历史.
- 它的早期进化涉及与RLCK的保护伙伴关系,以激活防御.
- 在保持核心功能的同时,ZAR1获得了新的分子特征,并通过重复实现多样化.
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