设计者TALEs能够发现诱导细胞死亡的基因
Roxana A Roeschlin1, Sepideh M Azad2, René P Grove3
1Instituto de Biología Molecular y Celular de Rosario (IBR)-Consejo Nacional de Investigaciones Científicas y Tecnológicas (CONICET), Ocampo y Esmeralda S/n, S2002LRK, Rosario, Argentina.
Plant physiology
|May 9, 2024
概括
来自Xanthomonas细菌的转录激活器样效应体 (TALEs) 可以触发植物细胞死亡. 研究人员确定了两种植物基因负责TALE诱导的细胞死亡,揭示了植物病原体相互作用的新见解.
科学领域:
- 植物病理学 植物病理学
- 分子生物学分子生物学
- 遗传学 是一个遗传学.
背景情况:
- 转录激活器样效应体 (TALEs) 是Xanthomonas细菌分泌的,用于操纵植物基因表达,影响感染和耐药性.
- 带有截断的DNA结合域的TALE PthA4AT诱导了Nicotiana benthamiana的细胞死亡,但其遗传标仍然未确定.
研究的目的:
- 识别TALE PthA4AT准的植物基因,这些基因在N. benthamiana中介于细胞死亡.
- 为了研究PthA4AT诱导的细胞死亡的序列特异性.
- 探索TALE依赖执行器抗性基因的起源.
主要方法:
- 利用TALE模块化来提高特异性并减少目标地点.
- 在TALE重复区域内执行特定序列替换.
- 进行了转录组分析和in silico目标预测.
- 识别和验证的细胞死亡诱导基因.
主要成果:
- PthA4AT依赖的细胞死亡是特定于序列的.
- 逐步修改TALE重复缩小了主办方的认可.
- 发现了两种新型的细胞死亡诱导基因:一种是编码类似帕他丁的蛋白质,另一种是双功能单酸缩酶/碳酸无水酶.
- 这些基因与已知的TALE-依赖性耐药性无关.
结论:
- 特定内源植物基因的异常表达可以触发细胞死亡.
- 支持这样一个假设,即TALE执行器耐药性基因可以从各种植物过程中产生的.
- 证明 TALEs 是一种用于全基因组选诱导细胞死亡等特定表型的基因的工具.
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