微小的DNA元素,在植物中起到绝缘体和沉声器的作用
Tobias Jores1,2,3, Nicholas A Mueth1, Jackson Tonnies1,4
1Department of Genome Sciences, University of Washington, Seattle, WA, USA.
bioRxiv : the preprint server for biology
|September 30, 2024
概括
用植物STARR-seq.来确定对基因调节至关重要的植物绝缘体和沉声器. 这些元素可以阻止增强剂或抑制转录,为植物生物技术提供有价值的工具.
科学领域:
- 植物分子生物学 植物分子生物学
- 基因调节 基因调节
- 表观遗传学 在表观遗传学中,表观遗传学是指表观遗传学.
背景情况:
- 绝缘体是 cis 调节元件,可以分离转录单元.
- 沉声器不论其基因组位置如何,都会抑制转录.
- 植物绝缘体和沉声器在很大程度上没有特征.
研究的目的:
- 识别和描述植物绝缘体和沉声器元件.
- 探索这些元素在基因调节中的双重功能.
- 为了验证生物技术应用的多种植物物种的发现.
主要方法:
- 使用了植物STARR-seq (用于调控DNA测序的特定转基因测试) 大规模并行记者测试.
- 测试了八个已知的大型绝缘体的短片段.
- 在稳定的转基因阿拉比多普西斯,玉米和大米植物中验证识别元素.
主要成果:
- 鉴定出超过100个有效阻止增强剂活性的DNA片段.
- 证明了短片段可以结合起来制造出强大的绝缘体.
- 观察到,当这些元素置于弱增强器的上游时,它们起到沉声器的作用.
- 证实了这些元素的取决于上下文的双重功能 (隔离或压制).
- 在不同的植物物种中验证了这些发现,包括Arabidopsis,玉米和大米.
结论:
- 发现了具有双重绝缘和抑制功能的新型植物 cis-regulatory 元素.
- 这些元素的活动取决于具体的监管环境.
- 鉴定到的短元素是植物生物技术和基因工程工作的宝贵基石.
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