视觉化表观遗传学:对研究DNA甲基化模式,染色体结构和基因表达的显微镜技术的审查
Anna-Lee C Thompson1, Judith L M Wopereis1, Yonas I Tekle2
1Department of Biological Sciences, Smith College, 44 College Ln, Northampton, MA 01063, USA.
概括
显微镜可视化表观遗传修饰,如DNA甲基化和细胞内的基因素标记. 这种成像为理解基因表达和染色体重塑提供了至关重要的空间背景.
科学领域:
- 细胞生物学 细胞生物学
- 分子生物学分子生物学
- 遗传学 是一个遗传学.
背景情况:
- 表观遗传修饰调节基因表达以应对环境因素.
- 传统的分子和奥米克方法缺乏表观遗传机制的空间背景.
- 显微镜提供了一个强大的工具,可以在现场可视化和量化表观遗传点.
研究的目的:
- 综合关于显微镜方法可视化表观遗传标记的信息.
- 突出空间数据在理解表观遗传调节方面的重要性.
- 展示成像如何帮助辨别表观遗传修饰的功能.
主要方法:
- 对光显微镜技术的审查.
- 电子显微镜用于表观遗传可视化的应用.
- 使用超分辨率显微镜进行高分辨率成像.
- 对表观遗传点的标签策略的开发.
主要成果:
- 显微镜可以可视化DNA甲基化,基因素修饰和RNA局部化.
- 图像检测提供了单细胞内表观遗传标记的空间和定量数据.
- 不同的显微镜技术为表观遗传学研究提供了不同的分辨率和能力.
结论:
- 显微镜对于理解表观遗传标记的结构和功能作用至关重要.
- 成像方法为表观遗传机制提供了关键的空间背景.
- 可视化表观遗传修饰可以提高我们对基因表达和染色质重塑的理解.
相关概念视频
01:46Epigenetic Regulation
Epigenetic mechanisms play an essential role in healthy development. Conversely, precisely regulated epigenetic mechanisms are disrupted in diseases like cancer.
02:32Histone Modification
The histone proteins have a flexible N-terminal tail extending out from the nucleosome. These histone tails are often subjected to post-translational modifications such as acetylation, methylation, phosphorylation, and ubiquitination. Particular combinations of these modifications form “histone codes” that influence the chromatin folding and tissue-specific gene expression.
Acetylation
The enzyme histone acetyltransferase adds acetyl group to the histones. Another enzyme, histone deacetylase,...
Acetylation
The enzyme histone acetyltransferase adds acetyl group to the histones. Another enzyme, histone deacetylase,...
03:17Inheritance of Chromatin Structures
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 DNA...
01:46Epigenetic Regulation
Epigenetic mechanisms play an essential role in healthy development. Conversely, precisely regulated epigenetic mechanisms are disrupted in diseases like cancer.
01:37Epigenetic Regulation
Epigenetic changes alter the physical structure of the DNA without changing the genetic sequence and often regulate whether genes are turned on or off. This regulation ensures that each cell produces only proteins necessary for its function. For example, proteins that promote bone growth are not produced in muscle cells. Epigenetic mechanisms play an essential role in healthy development. Conversely, precisely regulated epigenetic mechanisms are disrupted in diseases like cancer.
X-chromosome...
X-chromosome...
02:32Histone Modification
The histone proteins have a flexible N-terminal tail extending out from the nucleosome. These histone tails are often subjected to post-translational modifications such as acetylation, methylation, phosphorylation, and ubiquitination. Particular combinations of these modifications form “histone codes” that influence the chromatin folding and tissue-specific gene expression.
Acetylation
The enzyme histone acetyltransferase adds acetyl group to the histones. Another enzyme, histone deacetylase,...
Acetylation
The enzyme histone acetyltransferase adds acetyl group to the histones. Another enzyme, histone deacetylase,...