假设的瘤基因GASC1在素H3上去甲基化三甲基化和二甲基化素9
Paul A C Cloos1, Jesper Christensen, Karl Agger
1Biotech Research & Innovation Centre, Fruebjergvej 3, 2100 Copenhagen, Denmark.
Nature
|May 30, 2006
概括
在状细胞癌1 (GASC1) 中增强的基因,一种基因素脱甲基酶,去除了抑制的H3K9me3标记. 这一发现表明GASC1.
科学领域:
- 表观遗传学 在表观遗传学中,表观遗传学是指表观遗传学.
- 分子生物学分子生物学
- 癌症研究 癌症研究
背景情况:
- 基因组甲基化,特别是H3K9me3/me2,对于异性染色素的形成和基因沉默至关重要.
- 传统上,H3K9me3被认为是一种稳定,永久的表观遗传修饰.
- 与H3K9me3结合的HP1蛋白调解了转录抑制.
研究的目的:
- 为了识别与H3K9me3.3相互作用的蛋白质.
- 调查GASC1 (JMJD2C) 和其子家族成员在H3K9me3.3上的酶活性.
- 阐明GASC1在染色体调节和癌症发展中的作用.
主要方法:
- 在体外测试GASC1和JMJD2家族成员的脱甲基酶活性的生物化学测试.
- 分析H3K9me3 / me2,H3K9me1水平和HP1局部化在子宫外GASC1表达的体内.
- 在GASC1抑制后细胞增殖的评估.
主要成果:
- GASC1和其他JMJD2成员被确定为H3K9me3 / me2脱甲基酶,需要铁和α-甲酸盐.
- 在体内,GASC1的宫外表达降低了H3K9me3/me2水平,并增加了H3K9me1水平.
- GASC1的枯竭抑制了细胞增殖,这表明它在瘤发育中的作用.
结论:
- GASC1是一种新型的基因组三甲基脱甲酶,可以去除H3K9me3标记.
- GASC1的活动会影响异色素蛋白的结构和基因表达.
- GASC1在癌症发展中的作用将其定位为潜在的治疗点.
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