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Updated: Jul 17, 2025

Yeast As a Chassis for Developing Functional Assays to Study Human P53

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Published on: August 4, 2019

通过对合成TP53响应元素进行系统解剖来优化TP53报告器

Max Trauernicht^1,2, Chaitanya Rastogi³, Stefano G Manzo^1,2,4

¹Division of Gene Regulation, Netherlands Cancer Institute, 1066 CX Amsterdam, The Netherlands.

Nucleic acids research

|August 31, 2023

概括

瘤抑制蛋白p53 (TP53) 显示出矛盾的活性,中 afinity 的结合点比高 afinity 的更能驱动转录. 通过合作,TP53结合位点之间的最佳间距可以增强基因激活.

科学领域:

分子生物学分子生物学
遗传学是一个遗传学.
癌症研究癌症研究

背景情况:

瘤抑制蛋白p53 (TP53) 对于DNA修复和亡等细胞过程至关重要.
了解TP53结合部位架构如何影响基因表达对于癌症研究至关重要.

研究的目的:

研究TP53结合部位特征 (亲缘关系,拷贝数,间距,序列) 对转录输出的影响.
开发TP53驱动基因活动的预测模型.

主要方法:

在三个细胞系中对TP53结合部位变异的系统检查.
结合点亲和力,副本数,间隔器长度/序列和核心促进体效应的分析.
开发一个日志线性模型,以将序列特征与转录活动相关联.

主要成果:

发现中等亲和度的TP53结合部位是比高亲和度的部位更强大的转录激活剂.
最佳间隔的相邻TP53结合位点 (∼10-bp周期) 显示出超添加激活,表明合作性.
成功构建了一个日志线性模型,以基于序列特征来预测TP53活动.

结论:

TP53结合点的亲和和排列显著调节了转录输出.
合作结合和最佳的DNA螺旋位置是TP53-介导基因激活的关键机制.
开发的模型有助于设计用于研究和治疗应用的新,高度活跃的TP53记者系统.

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Reporter Genes

Reporter Genes

Reporter genes are a type of protein-coding gene that are often tagged to a gene of interest. Once inside a target cell, reporter genes usually produce visually identifiable characteristics like fluorescence and luminescence when expressed along with the gene of interest. Thus, reporter genes “report” the presence or absence of genes of interest in an organism, determine the gene expression pattern, or track the physical location of a DNA segment or protein in the cell.