相关实验视频

Updated: Jul 5, 2025

An Efficient Method for Quantitative, Single-cell Analysis of Chromatin Modification and Nuclear Architecture in Whole-mount Ovules in Arabidopsis

An Efficient Method for Quantitative, Single-cell Analysis of Chromatin Modification and Nuclear Architecture in Whole-mount Ovules in Arabidopsis

Published on: June 19, 2014

结构变异和DNA甲基化塑造了Arabidopsis中的中心-近端介质交叉景观

Joiselle B Fernandes^1,2, Matthew Naish¹, Qichao Lian²

¹Department of Plant Sciences, University of Cambridge, Cambridge, CB2 3EA, UK.

|January 23, 2024

概括

中介质通过表观遗传因素抑制介质重组,特别是DNA甲基化,尽管DNA序列是可变的. 这项研究绘制了Arabidopsis thaliana中中间体周围的交叉抑制区域的地图.

科学领域:

遗传学是一个遗传学.
表观遗传学在表观遗传学中,表观遗传学是指表观遗传学.
分子生物学分子生物学

背景情况:

中介质对于细胞分裂期间的染色体分离至关重要.
中心基因DNA序列在物种之间高度可变,但普遍抑制介质重组.
基因和表观遗传机制的基因和表观遗传机制的基因和表观遗传机制的基因和表观遗传机制的基因和表观遗传机制的基因和表观遗传机制的基因和表观遗传机制的基因和表观遗传机制的基因和表观遗传机制的基因和表观遗传机制的基因和表观遗传机制的基因和表观遗传机制的基因和表观遗传机制的基因和表观遗传机制的基因和表观遗传机制的基因和表观遗传机制的基因和表观遗传机制的基因和表观遗传机制的基因和表观遗传机制.

研究的目的:

为了研究Arabidopsis thaliana的中心-近端介质重组景观.
识别导致中心分子交叉抑制的遗传和表观遗传因素.

主要方法:

在Arabidopsis thaliana基因组中对14397个交叉的高分辨率映射.
对重组模式的分析与中心层卫星重复,CENH3负载和逆转移素含量相关.
检查DNA甲基化突变 (met1和cmt3) 对重组抑制的影响.

主要成果:

阿拉比多普西斯·塔利亚纳的中间体具有巨基卫星重复阵列和结构多态区域,缺乏交叉.
重组抑制的区域侧面的中间体是丰富的吉普赛/Ty3逆转移体,并包含表达的基因.
基因甲基化对于调节重组至关重要,突变物改变了侧边区域交叉抑制的程度.
中心和近端热点重叠在异色染色体内的基因岛屿.

结论:

阿拉比多普西斯塔利亚纳的遗传和表观遗传组织的中间体和周围中心的异色素决定了交叉抑制区域.
基因甲基化在塑造围绕中心分子的介质重组景观方面发挥着重要作用.

关键词:

阿拉比多普西斯 (Arabidopsis) 是一种植物.中介质是中介质的组成部分.交叉式车辆交叉式车辆通过DNA甲基化.介质变化 (Meiosis) 是一个过程.再组合的重组方式

更多相关视频

Determination of DNA Methylation of Imprinted Genes in Arabidopsis Endosperm

Determination of DNA Methylation of Imprinted Genes in Arabidopsis Endosperm

Published on: January 28, 2011

Efficient and Rapid Isolation of Early-stage Embryos from Arabidopsis thaliana Seeds

Efficient and Rapid Isolation of Early-stage Embryos from Arabidopsis thaliana Seeds

Published on: June 7, 2013

相关概念视频

Crossing Over

Crossing Over

Crossing over is the exchange of genetic information between homologous chromosomes during prophase I of meiosis I. Genetic recombination gives rise to allelic diversity in the newly formed daughter cells. In humans, crossing over produces genetically distinct haploid egg and sperm cells that undergo fertilization to produce unique offspring. Before cell division starts, the germ cell’s chromosome(s) undergo duplication in the S phase of the cell cycle. As the cells enter prophase I,...

Histone Variants at the Centromere

Histone Variants at the Centromere

Histone variants are the histone proteins with structural and sequence variations. These variants may be regarded as “mutant” forms that replace their canonical histone counterparts in the nucleosomes. Specific post-translational modifications on the histone variants enable further chromatin complexity and regulate tissue-specific gene expression. The most common histone variants are from histone H2A, H2B, and linker histone H1 families. However, several variants of histone H3...

Meiosis I

Meiosis I

Meiosis is the division of a diploid cell into haploid cells forming sperm and eggs in animals through differentiation. Meiosis I is the first stage of meiosis, where the genetic recombination of homologous chromosomes and the reduction of the ploidy level by half occurs.
Prophase I is the most extended and complex step of meiosis I characterized by synapsis, chromosome pairing, and recombination of the homologous chromosomes. This process is facilitated by a proteinaceous structure called the...

Meiosis vs. Mitosis

Meiosis vs. Mitosis

Cell division is necessary for growth and reproduction in organisms. Mitosis aids cell growth and development by dividing somatic cells. In contrast, meiosis causes the division of germ cells and plays an essential role in sexual reproduction. Due to their unique functional requirements, mitosis and meiosis differ from each other in multiple aspects.
Before the start of mitosis and meiosis I, the cell synthesizes DNA, resulting in two homologous copies of each chromosome. DNA synthesis is...

Gene Conversion

Gene Conversion

Other than maintaining genome stability via DNA repair, homologous recombination plays an important role in diversifying the genome. In fact, the recombination of sequences forms the molecular basis of genomic evolution. Random and non-random permutations of genomic sequences create a library of new amalgamated sequences. These newly formed genomes can determine the fitness and survival of cells. In bacteria, homologous and non-homologous types of recombination lead to the evolution of new...

Meiosis II

Meiosis II

Meiosis II entails cell division and segregation of the sister chromatids, resulting in the production of four unique haploid gametes. The steps for meiosis II are similar to mitosis, except that meiosis II occurs in haploid cells, whereas mitosis occurs in diploid cells.
The timing and cell division patterns of meiosis differ between males and females. In male meiosis, the centrosomes are part of the formation of the meiotic spindle. However, in oocytes, including that of humans, Drosophila,...