大量のアミノ端末切除を含有する酵母ヒストンH2Bは,in vivoで機能することができます
Cell
|December 1, 1983
まとめ
ヒストーンH2B
科学分野:
- 分子生物学は分子生物学である.
- 遺伝学 遺伝学とは
- バイオケミストリー バイオケミストリー
背景:
- ヒストンはDNAを核細胞に包装するのに不可欠です.
- ヒストンのアミノ末端は,核細胞核の外に広がっている.
- 実験室内研究では,アミノ・ターミンが核細胞組成に欠かせないことが示唆されています.
研究 の 目的:
- ヒストンH2Bのアミノ端末領域のインビボの有意性を調査する.
- アミノ端末の欠失が酵母におけるヒストンの機能に影響するかどうかを判断する.
主な方法:
- 酵母ヒストンのH2B変異を合成し,アミノ末端に欠損を伴う.
- 野生型H2Bタンパク質が欠けている酵母菌株を使用した.
- ミュータントヒストンのタンパク質機能,フェノタイプ,クロマチンの構成を in vivo で評価した.
主要な成果:
- 酵母ヒストンH2Bは,大きなアミノ端末切除にもかかわらず,in vivoで機能します.
- 変異したタンパク質は明らかなフェノタイプを示せず,染色体組立の間に選択されませんでした.
- カーボキシル末端の重要な部分の削除は致命的であることが判明しました.
結論:
- ヒストンH2Bのアミノ末端は,体内において不可欠な機能を果たすために,ほとんど必要不可欠である.
- 重要なヒストンの機能は,主にアミノ末端以外の領域と関連しています.
関連する概念動画
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