hCAS/CSE1L与染色质相关,并调节选择p53向基因的表达
Tomoaki Tanaka1, Shuichi Ohkubo, Ichiro Tatsuno
1Department of Biological Sciences, Columbia University, New York, NY 10027, USA.
Cell
|August 28, 2007
概括
人类细胞亡敏感性蛋白 (hCAS/CSE1L) 结合特定的基因促进体,影响p53介导的转录和细胞结局,如亡. 它的下调影响基因表达和基因素甲基化.
科学领域:
- 分子生物学分子生物学
- 细胞生物学 细胞生物学
- 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:
- 瘤抑制蛋白p53控制了对细胞命运至关重要的基因,包括生长停止和亡.
- 对于这些结果来说,p53的促销者选择性交易活化至关重要,但仍然不太了解.
- 了解调节p53点基因活性的因素是解读细胞反应的关键.
研究的目的:
- 研究人类细胞亡敏感性蛋白 (hCAS/CSE1L) 在p53介导的基因调节中的作用.
- 要确定hCAS/CSE1L是否与p53标促进体结合并影响其转录.
- 阐明hCAS/CSE1L结合对细胞结果和表观遗传修饰的功能后果.
主要方法:
- 研究了hCAS/CSE1L与p53向基因促进者的关联,包括PIG3.
- 评估了hCAS/CSE1L下调对基因转录和亡率的影响.
- 在hCAS/CSE1L沉默后,分析了基因素甲基化模式的变化,特别是H3K27甲基化.
主要成果:
- 发现hCAS/CSE1L与p53标促进体的子集结合,例如PIG3,独立于p53.
- 降低的hCAS/CSE1L水平导致其首选标促进体的转录减少,并减少了亡.
- 静止hCAS/CSE1L导致在PIG3基因位点增加了基因素H3氨酸27的甲基化.
结论:
- 人类CAS/CSE1L作为一种与染色质相关的蛋白质,可以结合特定的基因.
- hCAS/CSE1L在p53介导的转录和细胞结局的确定中发挥着重要作用.
- 核细胞质运输因子hCAS/CSE1L通过促进体结合和表观遗传修饰影响基因表达.
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