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化学修饰辅助双硫酸盐测序 (CAB-Seq) 用于在DNA中检测5 - 碳基细胞素
Xingyu Lu1, Chun-Xiao Song, Keith Szulwach
1Department of Chemistry and Institute for Biophysical Dynamics, University of Chicago, 929 East 57th Street, Chicago, Illinois 60637, United States.
Journal of the American Chemical Society
|June 14, 2013
概括
我们开发了化学修饰辅助双硫酸盐测序 (CAB-Seq) 来检测DNA中的5 - 碳素细胞素 (5caC). 这种方法使5caC的精确,单基分辨率映射成为可能,这对于理解DNA脱甲基化至关重要.
科学领域:
- 表观遗传学和分子生物学
- 修改和修复DNA的方法
背景情况:
- 通过TET家族蛋白质的介导,5-甲基细胞因子 (5mC) 逐步氧化为5-基甲基细胞因子 (5hmC),5-甲基细胞因子 (5fC) 和5-基细胞因子 (5caC).
- 5fC和5caC是胺DNA糖酶的基质,将5mC氧化与活性DNA脱甲基化途径联系起来.
研究的目的:
- 开发一种新的方法,以单基分辨率检测5 - 碳基细胞素 (5caC).
- 建立一种可靠的技术来绘制基因组DNA中的5caC修饰.
主要方法:
- 开发了化学修饰辅助的二硫酸盐测序 (CAB-Seq).
- 优化1-乙基-3-[3-二甲基氨基]碳二胺化 (EDC) 在5caC和初级氨基之间形成胺键.
- 修改后的5caC对二硫酸盐诱导的除的耐药性的验证.
主要成果:
- CAB-Seq成功检测了5caC,使用单基分辨率.
- 由EDC催化的修饰保护5caC在双硫酸盐处理过程中免受去胺.
- 这种化学标签策略与标准的二硫酸盐测序协议兼容.
结论:
- CAB-Seq提供了一种强大而准确的5caC测序方法.
- 这种技术有助于研究活性DNA脱甲基和表观遗传调节.
- CAB-Seq是表观基因组研究的一个有价值的工具,需要精确地绘制5caC.
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