量化转录因子特异性,使用先进的DNA通用微阵列,具有长和修改的结合点
Yuval Bayer1, Michael P O'Hagan1, Irina Miodownik1
1Department of Chemical and Structural Biology, Weizmann Institute of Science, 234 Herzl St., 7610001 Rehovot, Israel.
Nucleic acids research
|December 29, 2025
概括
新的微阵列平台Ex-uPBM和Mod-uPBM增强了对转录因子 (TF) DNA结合的研究. 它们捕捉了更长的动机和像5-甲基细胞素这样的表观遗传修饰,为基因调节提供了更深入的见解.
科学领域:
- 分子生物学分子生物学
- 基因组学就是基因组学.
- 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:
- 转录因子 (TF) 的DNA结合特异性对于基因调节至关重要.
- 通用蛋白结合微阵列 (uPBM) 用于研究TF特异性,但仅限于短DNA图案和正规基.
- 现有的方法无法解决扩展序列背景或表观遗传修饰对TF结合的影响.
研究的目的:
- 开发用于TF-DNA结合分析的增强平台,克服传统PBMs的局限性.
- 为了能够直接测量较长的DNA基因和修改基因对TF结合特异性的影响.
- 为了更全面地了解基因调节中的TF结合动态.
主要方法:
- 开发Ex-uPBM (扩展的高阶德布莱恩序列) 用于更长的动机分析.
- 为表观遗传修饰研究开发Mod-uPBM (具有修饰基的德布赖恩序列).
- 应用Ex-uPBM和Mod-uPBM来测量TF与扩展和修改的DNA序列的结合.
主要成果:
- 前-uPBM允许直接测量高达10bp的图案,并揭示了侧边区域的特异性.
- Mod-uPBM在所有序列环境中量化了5-甲基细胞素 (5mC) 的能量效应.
- 一个完整的能量位置重量矩阵 (PWM) 在单核酸分辨率上揭示了特定于背景的5mC效应.
结论:
- 前-uPBM和Mod-uPBM提供了强大的和可扩展的策略,用于TF约束量化.
- 这些平台能够捕捉出超出标准UPBM能力的序列和修改复杂性.
- 改进的方法可以更深入地了解TFs对基因调节的机制.
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