在小鼠和人类细胞中NF-Y的基因组结合
Mirko Ronzio1, Andrea Bernardini1, Valentina Taglietti1
1Dipartimento di Bioscienze, Università degli Studi di Milano, Milano, Italy.
Genomics
|July 18, 2024
概括
在哺乳动物细胞中的促进体和可移植元素中确定了NF-Y转录因子结合位. NF-Y似乎在基因促进者中发挥了先驱作用,但在可移植元素中没有.
科学领域:
- 分子生物学分子生物学
- 基因组学就是基因组学.
- 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:
- NF-Y是一种关键的转录因子,它与CCAAT盒动机结合.
- 了解NF-Y的调节机制对于理解基因表达控制至关重要.
研究的目的:
- 阐明NF-Y在不同哺乳动物细胞类型中的全基因组结合策略.
- 调查NF-Y及其辅因子USF1在目标位置之间的功能关系.
主要方法:
- 分析了来自人类和小鼠细胞的16个ChIP-seq数据集.
- 分享和特定于细胞类型的NF-Y结合位点的识别.
- 评估在NF-Y位点发生的组素修饰和辅助因子结合.
- 在NF-YB失活时对USF1的约束评估.
主要成果:
- NF-Y通常与参与细胞循环,新陈代谢和基因表达的活跃转录基因的促进体结合.
- 此外,NF-Y还与增强剂和特定的类似逆转录病毒的可移植元素 (TE) 结合.
- 在NF-YB无活化后,促进剂的USF1结合显著降低,但在MLT1 TEs中仅受轻微影响.
结论:
- 在哺乳动物细胞中,NF-Y向了一组保存的功能位点.
- NF-Y在基因促进剂中发挥着先驱性的作用,促进了染色体的可访问性.
- NF-Y在可转移元素中的作用不同于其在促进者的作用,这表明了不同的监管机制.
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