相关实验视频
Updated: Jul 13, 2025

22:27
Hi-C: A Method to Study the Three-dimensional Architecture of Genomes.
Published on: May 6, 2010
409.1K
从使用DARIC的Hi-C数据中识别定量差异化的染色体细分变化及其生物学意义
Yan Kai1, Nan Liu2,3, Stuart H Orkin4,5
1Cancer and Blood Disorders Center, Boston Children's Hospital and Dana-Farber Cancer Institute, Harvard Medical School, Boston, MA, 02115, USA.
BMC genomics
|October 13, 2023
概括
我们开发了DARIC,这是一个计算框架,用于量化染色体分离的变化. DARIC揭示了影响基因调节的大量变化,并提供了对基因组组织的新见解.
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:
- 染色体细分对于细胞分化和瘤生成至关重要.
- 目前对分隔的比较分析仅限于定性切换分隔.
研究的目的:
- 从全基因组的染色质构成数据开发一个计算框架,用于识别基因组区域的定量差分分区分变化.
- 分析人类心肌细胞分化过程中的定量分隔变化.
- 为了剖析人类基因组中的区间变异性景观.
主要方法:
- 开发了DARIC,这是一个计算框架,包含对分隔量化,规范化和差异分析的模块.
- 应用DARIC对人类心肌细胞分化的Hi-C数据.
- 分析了来自4DN的32个Hi-C数据集的汇编,以研究区间变性.
主要成果:
- DARIC确定了大量的基因组区域,具有显著的定量分类变化,与定性切换不同.
- 这些定量变化与基因表达,染色质可访问性,H3K27ac强度和核层相互作用的变化相关.
- 在心肌细胞分化过程中剖析了两种不同的基因激活机制,并发现了分区变异性和子分区之间的相关性.
结论:
- DARIC是分析定量分隔变化和从高温数据中提取生物见解的宝贵工具.
- 定量分隔变化在基因调节中起着重要作用.
- 提供了对人类基因组中分区变异性和子分区之间的关系的新见解.
相关概念视频
Heterochromatin
13.7K
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...
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...
13.7K
Karyotyping
61.5K
Overview
61.5K
Euchromatin
6.9K
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...
Euchromatin is the less dense region of the chromatin and stains lighter. Euchromatin contains histone H3 extensively...
6.9K
Position-effect Variegation
6.3K
In 1928, a German botanist Emil Heitz observed the moss nuclei with a DNA binding dye. He observed that while some chromatin regions decondense and spread out in the interphase nucleus, others do not. He termed them euchromatin and heterochromatin, respectively. He proposed that the heterochromatin regions reflect a functionally inactive state of the genome. It was later confirmed that heterochromatin is transcriptionally repressed, and euchromatin is transcriptionally active chromatin.
6.3K
Inheritance of Chromatin Structures
6.3K
Epigenetics is the study of inherited changes in a cell's phenotype without changing the DNA sequences. It provides a form of memory for the differential gene expression pattern to maintain cell lineage, position-effect variegation, dosage compensation, and maintenance of chromatin structures such as telomeres and centromeres. For example, the structure and location of the centromere on chromosomes are epigenetically inherited. Its functionality is not dictated or ensured by the underlying...
6.3K
Polytene Chromosomes
10.1K
Polytene chromosomes are giant interphase chromosomes with several DNA strands placed side by side. They were discovered in the year 1881 by Balbiani in salivary glands, intestine, muscles, malpighian tubules, and hypoderm of larvae Chironomus plumosus. Hence, these are also called "Salivary gland chromosomes." These are found in insects of the order Diptera and Collembola; in certain organs of mammals; and synergids, antipodes of flowering plants. Polytene chromosomes are also...
10.1K

