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相关概念视频

Heterochromatin02:38

Heterochromatin

11.7K
The extent of chromatin compaction can be studied by staining chromatin using specific DNA binding dyes. Under the microscope, the dense-compacted regions that take up more dye are called heterochromatin. Heterochromatin is further classified into two forms – constitutive heterochromatin and facultative heterochromatin.
Constitutive heterochromatin: It is a highly compact region of chromatin that is mostly concentrated in the centromere and telomere. Unlike euchromatin, the amino acid at...
11.7K
Euchromatin01:01

Euchromatin

6.8K
The extent of chromatin compaction can be studied by staining chromatin using specific DNA binding dyes. Under the microscope, the dense-compacted regions take up more dye, appearing darker, while the less-compact areas take up less dye and appear lighter. Based on the compaction level, chromatins are classified into two primary forms – euchromatin and heterochromatin.
Euchromatin is the less dense region of the chromatin and stains lighter. Euchromatin contains histone H3 extensively...
6.8K
Chromatin Immunoprecipitation- ChIP02:36

Chromatin Immunoprecipitation- ChIP

11.1K
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...
11.1K
Chromatin Modification in iPS Cells01:32

Chromatin Modification in iPS Cells

1.6K
Chromatin modification alters gene expression; therefore, scientists can add histone-modifying enzymes, histone variants, and chromatin remodeling complexes to somatic cells to aid reprogramming into pluripotent stem (iPS) cells.
Compact chromatin makes reprogramming difficult. Enzymes, such as histone demethylases and acetyltransferases, are often added during reprogramming to loosen the chromatin, making the DNA more accessible to transcription factors. Molecules that inhibit histone...
1.6K
Spreading of Chromatin Modifications02:25

Spreading of Chromatin Modifications

8.2K
The histone proteins in the nucleosomes are post-translationally modified (PTM) to increase or decrease access to DNA. The commonly observed PTMs are methylation, acetylation, phosphorylation, and ubiquitination of lysine amino acids in the histone H3 tail region. These histone modifications have specific meaning for the cell. Hence, they are called "histone code". The protein complex involved in histone modification is termed as "reader-writer" complex.
Writers
The writer...
8.2K

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相关实验视频

Updated: Jun 15, 2025

Mapping Genome-wide Accessible Chromatin in Primary Human T Lymphocytes by ATAC-Seq
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MINGLE:基于相互信息的可解释框架,用于在单细胞染色体可访问性数据中自动注释细胞类型.

Siyu Li1, Yifan Huang1, Shengquan Chen2

  • 1School of Mathematical Sciences and LPMC, Nankai University, Tianjin, 300071, China.

Genome biology
|June 11, 2025
PubMed
概括
此摘要是机器生成的。

MINGLE通过使用细胞相似性和拓学准确注释细胞类型来增强单细胞染色体可访问性测序 (scCAS) 分析. 这种可解释的框架还可以识别新型细胞类型,提供有价值的生物学见解.

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Single-Cell Factor Localization on Chromatin using Ultra-Low Input Cleavage Under Targets and Release using Nuclease
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Last Updated: Jun 15, 2025

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科学领域:

  • 基因组学就是基因组学.
  • 计算生物学 计算生物学
  • 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:

  • 单细胞染色体可访问性测序 (scCAS) 对于理解表观基因异质性至关重要.
  • 现有的方法在准确注释各种细胞类型,特别是罕见或新型细胞方面面临挑战.

研究的目的:

  • 引入MINGLE,这是一个可解释的框架,用于对scCAS数据进行准确的细胞类型注释.
  • 开发一种新的策略,在scCAS数据集中识别以前未被发现的细胞类型.
  • 为了增强从scCAS数据分析中获得的生物见解.

主要方法:

  • 开发了MINGLE,这是一个基于相互信息的框架,利用细胞相似性和拓结构.
  • 实施基于凸体外的战略,用于新型细胞类型识别.
  • 进行了广泛的实验,以评估MINGLE的性能与现有方法相比.

主要成果:

  • MINGLE表现出卓越的细胞类型注释准确性,特别是在罕见和新型细胞类型.
  • 该框架提供了有价值的生物见解,性能优于当前的注释工具.
  • 在跨批,跨组织和跨物种数据集中,MINGLE表现出强度和多功能性,有效地处理数据不平衡和大小变化.

结论:

  • 在scCAS数据中,MINGLE为复杂的细胞类型注释任务提供了通用和准确的解决方案.
  • 该框架识别新型细胞类型的能力为生物发现开辟了新的途径.
  • 在各种数据场景中MINGLE的表现强调了其在表观基因组研究中的广泛适用性.