相关实验视频

Updated: Jul 2, 2025

Deciphering Molecular Mechanism of Histone Assembly by DNA Curtain Technique

Deciphering Molecular Mechanism of Histone Assembly by DNA Curtain Technique

Published on: March 9, 2022

在CAF-1中,无序的区域和折叠的模块促进了Schizosaccharomyces pombe中素沉积

Fouad Ouasti¹, Maxime Audin¹, Karine Fréon²

¹Université Paris-Saclay, CEA, CNRS, Institute for Integrative Biology of the Cell (I2BC), Institute Joliot, Gif-sur-Yvette, France.

|February 20, 2024

概括

这项研究揭示了基因组辅导体CAF-1的作用.

科学领域:

分子生物学分子生物学
表观遗传学在表观遗传学中,表观遗传学是指表观遗传学.
染色体生物学染色体生物学

背景情况:

基因组和表观基因组的完整性依赖于与DNA合成相结合的基因组沉积.
基因组辅导体CAF-1对于这一过程至关重要,但其结构功能关系尚不清楚.
了解CAF-1与PCNA的相互作用对其一般机制至关重要.

研究的目的:

为了复制和描述裂变酵母CAF-1 (SpCAF-1).
阐明SpCAF-1的动态结构和功能机制.
研究SpCAF-1的结构特征在基因素沉积和基因组稳定性中的作用.

主要方法:

复制完整的SpCAF-1复合体. 复制完整的SpCAF-1复合体. 这是一个非常好的方法.
使用NMR,SAXS和分子建模进行结构性表征.
在体外和体内功能研究与相互作用突变物.

主要成果:

确定了一种内在展开的酸性域,该域在组素结合时折叠.
证明KER螺旋介导DNA结合并增强SpCAF-1-PCNA关联.
揭示了CAF-1的模块化组织如何促进激素沉积的动态相互作用.

结论:

SpCAF-1的结构,有无序和折叠的区域,可以实现动态的相互作用.
这种机制对于合成合的基因组沉积,DNA复制,异性染色质维护和基因组稳定性至关重要.
这些发现为了解真核细胞中CAF-1功能提供了一个框架.

关键词:

核组合组合的核组合.在S. pombe.这是表观遗传学.基因组的完整性基因组的完整性希斯辅导者希斯辅导者分子生物物理学分子生物物理学这就是NMR.萨克斯的萨克斯的结构生物学结构生物学

更多相关视频

Chromatin Immunoprecipitation ChIP of Histone Modifications from Saccharomyces cerevisiae

Chromatin Immunoprecipitation ChIP of Histone Modifications from Saccharomyces cerevisiae

Published on: December 29, 2017

Characterizing Histone Post-translational Modification Alterations in Yeast Neurodegenerative Proteinopathy Models

Characterizing Histone Post-translational Modification Alterations in Yeast Neurodegenerative Proteinopathy Models

Published on: March 24, 2019

相关概念视频

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...

Histone Modification

Histone 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...

Spreading of Chromatin Modifications

Spreading of Chromatin Modifications

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...

Separation of Sister Chromatids

Separation of Sister Chromatids

At the transition from prophase to metaphase, there is a reduction in cohesion along the chromosomal arms, resulting in the resolution of sister chromatids. However, residual cohesin connections remain to hold the sister chromatids together until the transition from metaphase to anaphase. The residual connection prevents any premature separation of sister chromatids, blocking the risks of aneuploidy within the daughter cells.
At the onset of anaphase, separase, a proteolytic enzyme, is...

Duplication of Chromatin Structure

Duplication of Chromatin Structure

The process of chromosome duplication during cell division requires genome-wide disruption and re-assembly of chromatin. The chromatin structure must be accurately inherited, reassembled, and maintained in the daughter cells to ensure lineage propagation.
The basic unit of the chromatin is the nucleosome, consisting of DNA wrapped around octameric histone proteins and short stretches of linker DNA separating individual nucleosomes. The histone proteins within the nucleosome have their...

Cytoskeletal Accessory Proteins

Cytoskeletal Accessory Proteins

The cytoskeleton is an essential cell component that plays several structural and functional roles. However, the filaments that make up the cytoskeleton cannot function independently and depend on the accessory or ancillary proteins to effectively carry out their function. Accessory proteins associate with cytoskeletal filaments and their monomers, aiding filament formation and function. They also help in the cross-communication among cytoskeletal filaments. Cytoskeletal accessory proteins are...