クロマチン 変種 の 特徴
Andrew Flaus1, Tom Owen-Hughes2
1Centre for Chromosome Biology, Biochemistry, School of Natural Sciences, National University of Ireland Galway, Ireland.
Cell
|September 7, 2019
まとめ
ある研究では ヒストンの変種と SRCAP 酵素の単一のメチル群の区別が 人間の顔の形状の発達に 極めて重要であることが示されています この発見は 分子メカニズムと 観察可能な形態学的欠陥を結びつけています
科学分野:
- 分子生物学
- 発達生物学
- 遺伝学
背景:
- 人間の顔の形は 複雑な発達過程です
- ヒストンの改変は,発達中の遺伝子調節において重要な役割を果たします.
- 染色体改造酵素SRCAPは遺伝子発現の調節に関与する.
研究 の 目的:
- 人間の顔の形状の発達に伴う 分子メカニズムを調査する
- ヒストン変種差別とSRCAPが頭蓋骨の形態変生における役割を調査する.
- 原子レベルの構造変化と 顕微鏡の形質学的欠陥を結びつけるため
主な方法:
- ヒストン変異異体とメチル化状態の分析
- 細胞と発達モデルのSRCAP酵素の機能を研究する.
- タンパク質と酵素の相互作用を理解するために 構造生物学技術を活用する.
主要な成果:
- ヒストン変異異体間の単一のメチル群を区別する能力は,正常な顔の発達に不可欠である.
- 染色体再構成酵素SRCAPは この過程で重要な役割を果たします
- これらの分子のメカニズムの障害は 頭蓋の形態学的欠陥につながる.
結論:
- この研究では,特定の分子現象 (ヒストンのメチル化差別,SRCAP活動) と人間の顔の形との間の直接的な関連が確認された.
- これらのメカニズムを理解することで 面発達障害の洞察が得られます
- この研究は 発達と病気におけるクロマチンの再構成の重要性を強調しています
関連する概念動画
04:41Mapping Alzheimer's Disease Variants to Their Target Genes Using Computational Analysis of Chromatin Configuration
19.3K
We present a protocol to identify functional implications of non-coding variants identified by genome-wide association studies (GWAS) using three-dimensional chromatin...
19.3K
02:30Histone Variants at the Centromere
5.0K
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...
5.0K
03:17Inheritance of Chromatin Structures
7.3K
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...
7.3K
02:21Chromatin Packaging
21.7K
Each human somatic cell contains 6 billion base-pairs of DNA. Each base-pair is 0.34 nm long, which means that each diploid cell contains a staggering 2 meters of DNA. How is such a long DNA strand packed inside a nucleus measuring only 10 - 20 microns in diameter?
The chromatin
In combination with specialized DNA binding protein called Histones, the DNA double helix forms a compact DNA: protein complex called chromatin. The chromatin itself is further compacted into higher-order...
The chromatin
In combination with specialized DNA binding protein called Histones, the DNA double helix forms a compact DNA: protein complex called chromatin. The chromatin itself is further compacted into higher-order...
21.7K
02:41Chromatin Structure Regulates pre-mRNA Processing
8.1K
In eukaryotic cells, nascent mRNA transcripts need to undergo many post-transcriptional modifications to reach the cell cytoplasm and translate into functional proteins. For a long time, transcription and pre-mRNA processing were considered two independent events that occur sequentially in the cell. However, it has now been well established that transcription and pre-mRNA processing are two simultaneous processes that are precisely regulated inside the cell.
The chromatin structure, especially...
The chromatin structure, especially...
8.1K
02:25Spreading of Chromatin Modifications
9.3K
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...
Writers
The writer...
9.3K