不同的SWI/SNF复合体协调地促进R-循环和RAD52依赖的转录合同源复合
Carlota Davó-Martínez1, Angela Helfricht1, Cristina Ribeiro-Silva1
1Department of Molecular Genetics, Erasmus MC Cancer Institute, Erasmus University Medical Center, Rotterdam 3015 GD, The Netherlands.
Nucleic acids research
|July 20, 2023
概括
多个SWI/SNF复合体,包括BAF,PBAF和ncBAF,被招募到活性基因中的DNA双链断裂 (DSB). 这些复合物促进同源重组和转录沉默,以有效修复DNA.
科学领域:
- 细胞生物学 细胞生物学
- 分子生物学分子生物学
- 癌症研究 癌症研究
背景情况:
- 依赖ATP的染色体重塑复合物的SWI/SNF家族在DNA损伤反应中发挥着关键作用.
- BAF,PBAF和ncBAF是不同的SWI/SNF复合体,在子单元组成上有所不同.
- 同源重组是修复转录活性DNA中的双链断裂 (DSB) 的关键途径.
研究的目的:
- 研究不同SWI/SNF复合体在DNA双链断裂修复中的特定作用.
- 阐明SWI/SNF复合体在DNA修复过程中调节转录的机制.
- 了解SWI/SNF复合体如何促进同源重组和R循环分辨率.
主要方法:
- 染色体免疫沉以评估SWI/SNF复合物的DSB招募.
- RNA测序用于监测DNA损伤部位附近的转录变化.
- 生物化学试验研究R循环分辨率和DNA修复因子招募.
主要成果:
- BAF,PBAF和ncBAF子单位以转录依赖的方式迅速被招募到DSB.
- PBAF和ncBAF复合体诱导RNA聚合酶II驱逐用于转录沉默.
- BAF复合体,特别是含有ARID1A的复合体,促进RNaseH1和RAD52的招募,以解决和修复R循环.
结论:
- 独特的SWI/SNF复合体通过协调的行动,在活跃转录的基因上编排DNA修复.
- 这些复合物促进同源重组,转录沉默和R循环分辨率,以有效修复DNA损伤.
- 了解SWI/SNF复杂功能,可以了解癌症的发展和潜在的治疗策略.
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