通过核氨酸氧化酶同类物LSD1调解的素脱甲基化
Yujiang Shi1, Fei Lan, Caitlin Matson
1Department of Pathology, Harvard Medical School, 77 Avenue Louis Pasteur, Boston, MA 02115, USA.
Cell
|December 29, 2004
概括
这项研究确定了氨酸特异性脱甲基酶1 (LSD1) 作为一个关键的基因素脱甲基酶. LSD1从基因组H3 lysine4中去除甲基,调节基因转录,并揭示了基因组甲基化的动态控制.
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
- 基因规则 基因规则
背景情况:
- 基因组尾巴的翻译后修饰,如乙化和甲基化,是染色质结构和基因转录的关键调节者.
- 虽然基因素乙化是由相反的酶 (乙转移酶和脱乙酶) 动态调节的,但对基因素甲基化相反的酶活性的存在尚不清楚.
研究的目的:
- 为了调查质子甲基化是否也由具有相反活动的酶调节.
- 识别和描述一种新型的基因组脱甲基酶的功能.
主要方法:
- 利用RNA干扰 (RNAi) 抑制LSD1.1的表达.
- 评估 histone H3 lysine 4 甲基化水平的变化.
- 监测目标基因的转录活性.
主要成果:
- Lysine-Specific Demethylase 1 (LSD1) 被确定为一个核胺氧化酶,其功能是基因素甲基酶.
- 具体来说,LSD1会去甲基化素4的组合素H3,这是一种与活跃转录相关的标记.
- 通过RNAi抑制LSD1导致H3氨酸4甲基化和目标基因脱抑制的增加,这表明LSD1在转录抑制中的作用.
结论:
- LSD1作为基因组脱甲基酶起作用,通过氧化反应催化基因组从基因组H3 lysine 4中去除.
- 这些发现揭示了基因组甲基化的动态调节,涉及基因组甲基酶和脱甲基酶,从酵母保存到人类.
- 4. LSD1通过积极去甲基化组织素H3氨酸,作为转录核心压缩剂.
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