复杂的细胞类型特异性转录调节由促进者和老鼠P-Cadherin基因的内部: (P-cadherin/细胞粘附分子/转录调节)
Masayuki Hatta1, Masatoshi Takeichi1
1Department of Biophysics, Faculty of Science, Kyoto University, Kitashirakawa, Sakyo-ku, Kyoto 606-01, Japan.
Development, growth & differentiation
|June 7, 2023
概括
鼠标P-cadherin基因促进体具有复杂的调控元素,包括重复序列和内基增强剂,影响其细胞类型特定的转录. 这些元素在不同的细胞系中表现出不同的活性,这表明对P-cadherin表达的复杂控制.
科学领域:
- 分子生物学分子生物学
- 发展生物学 发展生物学
- 遗传学 遗传学 是一个
背景情况:
- 卡德林,如P-cadherin,是重要的细胞-细胞粘附分子,在发育过程中具有动态调节的表达.
- 了解P-cadherin的转录调节对于破译发育过程和细胞粘附机制至关重要.
研究的目的:
- 阐明小鼠P-cadherin基因促进体的结构和转录活性.
- 为了确定P-cadherin基因中的调节元素,这些元素有助于其细胞类型特定表达.
主要方法:
- 对P-cadherin基因促进体结构的分析,包括重复的元素.
- 氨基酸转移酶 (CAT) 试验用于评估促进体的转录活性及其在各种细胞系中的5'删除.
- 在P-cadherin基因的第二个内基因内识别和表征增强剂类元素.
主要成果:
- 这种P-cadherin促销剂包含双联B2重复元素,类似于E-cadherin促销剂.
- P-cadherin促进体的转录活性在不同细胞系之间有显著的变化,甚至在P-cadherin阳性细胞系内也是如此.
- 该促进物在一些P-cadherin负细胞系中表现出活性,表明复杂的调节机制.
- 对5'删除的分析表明,不同的细胞类型对多个促进元的差异性利用.
- 在第二个内子中发现了类似增强剂的元素,能够激活P-cadherin和thymidine激酶促进体,其活性取决于细胞系.
结论:
- P-cadherin基因转录由位于促进子和第二个内突的调节元素的复杂相互作用来控制.
- 细胞类型特定的P-cadherin表达可能是通过这些调节元件的复杂组合以及潜在的其他未在这里研究的元素来实现的.
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