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相关概念视频

Chromatin Immunoprecipitation- ChIP02:36

Chromatin Immunoprecipitation- ChIP

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Chromatin immunoprecipitation, or ChIP, is an antibody-based technique used to identify sites on DNA that bind to transcription factors of interest or histone proteins. It also helps determine the type of histone modifications such as acetylation, phosphorylation, or methylation.
Types of ChIP
ChIP can be divided into two types - X-ChIP and N-ChIP. X-ChIP involves in vivo cross-linking of histones and regulatory proteins to DNA, fragmenting the DNA by sonication, and isolating the protein-DNA...
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一个圆形的工程排序酶用于查询染色质中的基因素H3.

Samuel D Whedon1,2, Kwangwoon Lee1,2, Zhipeng A Wang1,2

  • 1Division of Genetics, Department of Medicine, Brigham and Women's Hospital, Boston, Massachusetts 02115, United States.

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概括

研究人员开发了一种新工具,cW11排列酶,可以轻松创建修改的素H3尾巴. 这推动了表观遗传学和疾病的研究,通过更快地分析组织蛋白修饰及其在基因调节中的作用.

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科学领域:

  • 表观遗传学和分子生物学
  • 染色体生物学 染色体生物学
  • 蛋白质组学是指蛋白质组学.

背景情况:

  • 基因组H3 N-终端尾部修饰对于调节基因表达和细胞状态至关重要.
  • 这些修饰的失调与疾病的发病有关.
  • 在表观遗传学中,理解多个组素修饰之间的交叉交谈是一个重大挑战.

研究的目的:

  • 开发一种有效的方法来生产精确修饰的核细胞.
  • 为了研究多重组素修饰对酶处理和蛋白质识别的影响.
  • 为了使基因组修饰在内源性基因组中交叉的定量分析.

主要方法:

  • 工程类型酶转酶 (cW11) 用于无痕引入核体上素H3尾巴.
  • 产生对称和不对称地修改的核细胞.
  • 应用cW11为"切入和粘贴"中向下的蛋白质组学,使用对内源性组织蛋白质的双重质量标签.

主要成果:

  • cW11有助于快速产生修改后的核细胞体,使修改对酶和蛋白质相互作用的影响的剖析成为可能.
  • cW11有效地标记了内源性海斯顿H3尾巴,用于定量蛋白质组分析.
  • 在用胰腺激素脱乙酶抑制剂治疗后,证明了基因组H3修饰交叉的定量分析.

结论:

  • cW11排列酶是化学酶修饰和分离素H3尾巴的强大工具.
  • 这项技术加速了对基因组修饰交叉通话及其在表观遗传学中的作用的研究.
  • 开发的策略对表观遗传学发现和治疗开发具有重大潜力.