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Updated: Jun 21, 2025

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大多数玉米中高度可变的NLR共享基因组位置,并包含额外的目标绑定域
Daniil M Prigozhin1, Chandler A Sutherland2, Sanjay Rangavajjhala1
1Molecular Biophysics and Integrated Bioimaging Division, Berkeley Center for Structural Biology, Lawrence Berkeley National Laboratory, Berkeley, CA 94720, U.S.A.
Molecular plant-microbe interactions : MPMI
|July 16, 2024
概括
玉米免疫受体,核酸结合,富含白素的重复 (LRR) 蛋白 (NLRs),在四个关键子家族中表现出快速演变. 在第10染色体上,有三种不同的基因系聚集在一起,其中新的域可能有助于目标识别.
科学领域:
- 植物免疫学 植物免疫学
- 分子进化的分子进化.
- 基因组学就是基因组学.
背景情况:
- 结合核酸,富含白素的重复蛋白 (LRR) (NLRs) 是关键的植物免疫受体.
- 农作物中NLRs的进化历史尚不清楚.
- 农作物泛基因组为研究最近NLR基因家族演变提供了机会.
研究的目的:
- 使用嵌套关联映射 (NAM) 创始人线研究玉米中NLR基因家族演变.
- 描述玉米NLR的多样性和进化模式,特别是高度可变的NLR (hvNLR).
- 开发一种用于分析和语境化新发现的NLR序列的工具.
主要方法:
- 分析了NLR对26个玉米NAM创始人线的补充.
- 利用序列多样性分析和AlphaFold2进行结构预测和结合体结合位点识别.
- 开发了NLRCladeFinder,这是谷歌协作笔记本用于NLR分析.
主要成果:
- 确定了四个主要的玉米NLR子家族,包括快速演变的hvnlr.
- 发现三种不同的hvnlr系在第10号染色体上相邻地聚集在一起.
- 在hvNLR基团中观察到可变表达和甲基化,表明快速演变.
- 在hvNLRs的LRR区域中预测的联结位点和确定的新插入域.
结论:
- 玉米NLRs,特别是hvnLRs,表现出快速的进化和特定的基因组组织.
- 在 hvNLR 中的新域可能在目标识别中发挥作用.
- NLRCladeFinder为正在进行的玉米和其他物种的NLR研究提供了宝贵的资源.
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