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相关概念视频

Epigenetic Regulation01:37

Epigenetic Regulation

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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...
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Seed Structure and Early Development of the Sporophyte02:33

Seed Structure and Early Development of the Sporophyte

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Seed structures are composed of a protective seed coat surrounding a plant embryo, and a food store for the developing embryo. The embryo contains the precursor tissues for leaves, stem, and roots. The endosperm and cotyledons—seed leaves—act as the food reserves for the growing embryo.
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Genomic Imprinting and Inheritance02:30

Genomic Imprinting and Inheritance

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Diploid organisms inherit genetic material through chromosomes from both parents. Copies of the same gene are known as alleles. In most cases, both alleles are simultaneously expressed and allow various cellular processes to function optimally. If one of the alleles is missing or mutated, the expression of the other allele can compensate; however, this is not true for all genes.
The expression of some genes depends on which parent passed the gene to the offspring, through a phenomenon known as...
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Histone Modification02:32

Histone Modification

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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...
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Covalently Linked Protein Regulators02:04

Covalently Linked Protein Regulators

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Proteins can undergo many types of post-translational modifications, often in response to changes in their environment. These modifications play an important role in the function and stability of these proteins. Covalently linked molecules include functional groups, such as methyl, acetyl, and phosphate groups, and also small proteins, such as ubiquitin. There are around 200 different types of covalent regulators that have been identified.
These groups modify specific amino acids in a protein....
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相关实验视频

Updated: Jul 20, 2025

Determination of DNA Methylation of Imprinted Genes in Arabidopsis Endosperm
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Determination of DNA Methylation of Imprinted Genes in Arabidopsis Endosperm

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在花生种子发育过程中的动态DNA甲基化修饰.

Zhongfeng Li1, Qian Liu2, Kai Zhao1

  • 1College of Agronomy, Henan Agricultural University, Zhengzhou 450046, Henan Province, China.

iScience
|August 3, 2023
PubMed
概括
此摘要是机器生成的。

基因甲基化对植物发育至关重要. 这项研究揭示了花生种子中关键的DNA甲基化变化,突出了它在调节花生种子发育中的作用,并确定了突变系中与种子大小相关的变异.

关键词:
表观遗传学 在表观遗传学中,表观遗传学是指表观遗传学.植物开发 植物开发文字转录学 (Transcriptomics) 是一个学科.

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相关实验视频

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科学领域:

  • 表观遗传学 在表观遗传学中,表观遗传学是指表观遗传学.
  • 植物生物学 植物生物学
  • 分子生物学分子生物学

背景情况:

  • 细胞因子甲基化是植物发育中的关键表观遗传调节剂.
  • 控制花生种子发育的特定表观遗传机制尚不清楚.

研究的目的:

  • 在花生种子发育过程中调查DNA甲基化概况.
  • 为了比较野生类型花生线和较小的种子突变体之间的甲基化模式.
  • 识别差异甲基化区域 (DMR) 和它们与基因表达的关联.

主要方法:

  • 在定后15天和60天对发育中的花生种子 (野生型H2014和突变型H1314) 进行DNA甲基化分析.
  • 在发起体和基因区域中对差异甲基化区域 (DMR) 的分析.
  • 综合的甲基组和转录组分析.

主要成果:

  • 全球DNA甲基化水平随着两条线的花生种子发育而增加.
  • 较小的种子突变 (H1314) 与野生类型 (H2014) 相比,在60 DAP时表现出更高的甲基化水平.
  • 显著比例的DMR位于促进体或基因区域,其中一些显示甲基化和基因表达之间存在负相关性.

结论:

  • 基因甲基化在调节花生种子发育方面起着重要作用.
  • 不同的甲基化模式与种子发育和大小的变化有关.
  • 表观遗传修饰,特别是DNA甲基化,为理解和改进花生种子特性提供了潜在的目标.