配对的Su(Hw) 染色体绝缘体对绝缘体活动的损失
E Muravyova1, A Golovnin, E Gracheva
1Department of the Control of Genetic Processes, Institute of Gene Biology, Russian Academy of Sciences, Moscow 117334.
Science (New York, N.Y.)
|February 13, 2001
概括
染色素绝缘剂通常会阻断增强剂-促进剂相互作用. 然而,插入Drosophila Suppressor of Hairy-wing绝缘体的两个副本令人惊地中和了这种阻断效应,这表明蛋白质复杂相互作用可能参与其中.
科学领域:
- 分子生物学分子生物学
- 遗传学 是一个遗传学.
- 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:
- 染色素绝缘体是关键的调节性DNA元素.
- 它们防止转录增强剂激活意想不到的促进剂.
- 毛翅膀的Drosophila抑制剂 [Su(Hw]蛋白质结合绝缘体序列,但其作用机制尚不清楚.
研究的目的:
- 为了研究Su(Hw) 蛋白调解绝缘体功能的机制.
- 为了确定绝缘体复制号对阻断增强剂-促进剂相互作用的影响.
主要方法:
- 使用Drosophila melanogaster作为一个模型生物.
- 使用基因操纵,在增强剂和促进剂之间插入Su(Hw) 绝缘体元素的单个和双个副本.
- 评估增强剂-促进剂相互作用和基因表达水平.
主要成果:
- 一个单一的Su(Hw) 绝缘体副本有效地阻止了增强剂-促进剂相互作用.
- 意想不到的是,Su(Hw) 绝缘体的两个并列副本未能阻止,而是促进了增强剂-促进剂相互作用.
- 这表明绝缘体复合体的作用取决于剂量或形状.
结论:
- Su(Hw) 染色质绝缘体的活性不仅仅是添加的.
- 与多个绝缘体元素结合的蛋白质复合体之间的相互作用可能在调节它们的功能方面发挥关键作用.
- 这一发现为通过染色体绝缘体对基因调节的复杂机制提供了新的见解.
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