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Microscopy of Fission Yeast Sexual Lifecycle
Published on: March 9, 2016
クロモドメインタンパク質Swi6は,分裂酵母センターメアの重要な成分です
K Ekwall1, J P Javerzat, A Lorentz
1Medical Research Council Human Genetics Unit, Western General Hospital, Edinburgh, Scotland, UK.
まとめ
Swi6タンパク質は,ミトーシス中の分裂酵母センターメアの機能に不可欠です. 欠落すると,セントロメアの滞りや高染色体喪失率を引き起こし,染色体分離におけるその役割を強調する.
科学分野:
- 細胞生物学 細胞生物学
- 遺伝学 遺伝学とは
- 分子生物学は分子生物学である.
背景:
- セントロメアは,ミトーシス中の染色体のスパインドルへの結合に不可欠であり,染色体の正確な分布を保証します.
- 転写的に静かなヘテロクロマチンは,多くの種でセントロメア近くで見つかりますが,その機能は完全に理解されていません.
- 分裂酵母 (Schizosaccharomyces pombe) では,静かな交配型ロシ,セントロメア,テロメアはヘテロクロマチンのようなドメインを形成する.
研究 の 目的:
- Schizosaccharomyces pombeにおけるセントロメア機能とヘテロクロマチン組成におけるSwi6染色体タンパク質の役割を調査する.
- セントロメリック領域に比べてSwi6タンパク質の局所を決定する.
- ミトーシス中の染色体分離に対するSwi6の欠如の影響を評価する.
主な方法:
- 分裂酵母細胞におけるSwi6タンパク質の局所化研究.
- ワイルド型およびSwi6欠乏細胞におけるアナフェーズ中のセントロメア行動の分析.
- Swi6.6がない場合の染色体喪失率の評価
主要な成果:
- Swi6タンパク質 (Swi6p) は,分裂酵母における静かな交配型ロキュア,セントロメア,テロメアに局所化する.
- Swi6pが欠けている細胞は,アナフェーズ中にスピンドルに遅れているセントロメアを示します.
- Swi6pが欠けている細胞では染色体喪失率が著しく上昇しています.
結論:
- Swi6タンパク質は,分裂酵母センターメアで局所されています.
- Swi6タンパク質は,適切なセントロメア機能とミトーシス中の正確な染色体分離に不可欠です.
- この発見は,セントロメアの整合性を維持し,アヌプロイディを予防する上でSwi6が重要な役割を果たすことを示唆しています.
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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
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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...
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