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Observing Mitotic Division and Dynamics in a Live Zebrafish Embryo
Published on: July 15, 2016
コルネリア・デ・ランジ症候群のHDAC8変異は,コヘシンアセチル化サイクルに影響する
Matthew A Deardorff1, Masashige Bando, Ryuichiro Nakato
1Division of Human Genetics and Molecular Biology, The Children’s Hospital of Philadelphia, Pennsylvania 19104, USA. deardorff@email.chop.edu
Nature
|August 14, 2012
まとめ
コルネリア・デ・ランジェ症候群 (CdLS) は,SMC3.3を脱酸化するタンパク質であるHDAC8の変異と関連しています. HDAC8機能の喪失は,SMC3アセチル化の増加を引き起こし,CdLS患者のコヘシン機能と遺伝子調節に影響します.
科学分野:
- 遺伝学 遺伝学とは
- 分子生物学は分子生物学である.
- 発達生物学 発達生物学について
背景:
- コルネリア・デ・ランジェ症候群 (CdLS) は,先天性異常を引き起こす遺伝疾患です.
- NIPBLとコヘシン成分における変異がCdLSを引き起こす.
- コヘシン複合体は遺伝子発現と姉妹染色体の結合を調節する.
研究 の 目的:
- 脊椎動物SMC3デセチラゼ.を特定する.
- CdLSの病原性におけるHDAC8の役割を調査する.
主な方法:
- HDAC8を脊椎動物のSMC3脱酸化酵素として特定した.
- CdLS試験における機能喪失によるHDAC8変異を分析した.
- クロマチン免疫プレシピテーションシーケンシング (ChIP-seq) を実行した.
主要な成果:
- 機能喪失のHDAC8変異は6人のCdLSプロバンドで発見されました.
- HDAC8欠乏症は,SMC3アセチル化が増加し,コヘシン溶解が損なわれる.
- 変化したSMC3アセチル化はコヘシン負荷と遺伝子転写に影響します.
結論:
- HDAC8は,適切なコヘシン機能に不可欠であり,CdLSに関与しています.
- HDAC8変異は,SMC3脱酸化を阻害することでCdLSに寄与する.
- 発見は,CdLSの基礎となる新しいメカニズムを明らかにし,治療目標を強調しています.
関連する概念動画
Cohesins
Cohesin protein complexes are a molecular glue that holds two sister chromatids together. They play an important role both in mitosis and meiosis. In mitosis, all cohesin complexes present on the chromosomes are removed before the start of the anaphase stage.
Cohesin complexes in Meiotic Division
Meiosis involves two distinct rounds of chromosomal segregation and cell divisions— Meiosis I followed by Meiosis II – producing four daughter cells. Meiosis I includes the separation of homologous...
Cohesin complexes in Meiotic Division
Meiosis involves two distinct rounds of chromosomal segregation and cell divisions— Meiosis I followed by Meiosis II – producing four daughter cells. Meiosis I includes the separation of homologous...
Cohesins
Cohesin protein complexes are a molecular glue that holds two sister chromatids together. They play an important role both in mitosis and meiosis. In mitosis, all cohesin complexes present on the chromosomes are removed before the start of the anaphase stage.
Cohesin complexes in Meiotic Division
Meiosis involves two distinct rounds of chromosomal segregation and cell divisions— Meiosis I followed by Meiosis II – producing four daughter cells. Meiosis I includes the separation of homologous...
Cohesin complexes in Meiotic Division
Meiosis involves two distinct rounds of chromosomal segregation and cell divisions— Meiosis I followed by Meiosis II – producing four daughter cells. Meiosis I includes the separation of homologous...
Anaphase Promoting Complex
The stepwise destruction of specific proteins is necessary for the progression and completion of the cell cycle. Such proteins are ubiquitinated by ubiquitin ligases and then subsequently destroyed by the proteasome. The SCF (Skp1/Cullin/F-box) and the anaphase-promoting complex (APC) are two important ubiquitin ligases involved in cell cycle progression. While SCF is active throughout the cell cycle, APC gets activated during metaphase to anaphase transition. Cdc20 or Cdh1 binds to APC and...
Anaphase Promoting Complex
The stepwise destruction of specific proteins is necessary for the progression and completion of the cell cycle. Such proteins are ubiquitinated by ubiquitin ligases and then subsequently destroyed by the proteasome. The SCF (Skp1/Cullin/F-box) and the anaphase-promoting complex (APC) are two important ubiquitin ligases involved in cell cycle progression. While SCF is active throughout the cell cycle, APC gets activated during metaphase to anaphase transition. Cdc20 or Cdh1 binds to APC and...
Condensins
Condensins are large protein complexes that use ATP to fuel the assembly of chromosomes during mitosis. They transform the tangled, shapeless mass of post-interphase DNA into individualized chromosomes by compacting, organizing, and segregating chromosomal DNA.
The plant and animal cells contain two types of condensin complexes—condensin I and condensin II. Both complexes have five subunits: two SMC (Structural Maintenance of Chromosomes) subunits, a kleisin subunit, and two HEAT-repeat...
The plant and animal cells contain two types of condensin complexes—condensin I and condensin II. Both complexes have five subunits: two SMC (Structural Maintenance of Chromosomes) subunits, a kleisin subunit, and two HEAT-repeat...
Condensins
Condensins are large protein complexes that use ATP to fuel the assembly of chromosomes during mitosis. They transform the tangled, shapeless mass of post-interphase DNA into individualized chromosomes by compacting, organizing, and segregating chromosomal DNA.
The plant and animal cells contain two types of condensin complexes—condensin I and condensin II. Both complexes have five subunits: two SMC (Structural Maintenance of Chromosomes) subunits, a kleisin subunit, and two HEAT-repeat...
The plant and animal cells contain two types of condensin complexes—condensin I and condensin II. Both complexes have five subunits: two SMC (Structural Maintenance of Chromosomes) subunits, a kleisin subunit, and two HEAT-repeat...

