ニワトリのゲノムにおける組織特異ヒストンH5の遺伝子の繰り返しの頻度

A C Scott, J R Wells

Nature

|February 26, 1976

まとめ

研究者らは,鶏肉特異ヒストンH5のmRNAを網膜細胞から分離した. この補完的なDNA (cDNA) 分析により,H5ヒストン遺伝子が鶏のゲノムで10回繰り返されていることが明らかになった.

科学分野:

分子生物学は分子生物学である.
ゲノミクスゲノミクスとは
細胞生物学細胞生物学

背景:

エリトロイド細胞は,標準的な5種類のヒストンタイプに加えて,鶏のH5などのユニークなヒストンタンパク質を持っています.
ヒストンH5は,鶏の赤血球に含まれる組織特異のタンパク質です.

研究の目的:

チキン特有のヒストンH5.5をコードするメッセンジャーRNA (mRNA) を分離し,特徴づけること.
鶏のゲノム内のヒストンH5の遺伝子コピー番号を決定する.

主な方法:

間接的な免疫プレシピテーションは,未成熟の網膜細胞からヒストンH5 mRNAを分離するために使用されました.
ポリアデニル酸経路をmRNAに酵素で添加する.
補完的なDNA (cDNA) 合成は,鳥類ミエロブラストーシスウイルス逆転写酵素を用いて行われます.
cDNAを分析するためのハイブリダイゼーション研究.

主要な成果:

ヒストンH5mRNAは,鶏肉の網膜細胞から成功裏に分離されました.
ヒストンH5をコードする遺伝子は,鶏のゲノム内で約10回繰り返されます.

結論:

この研究では,鶏ヒストンH5.5のmRNAを成功裏に分離し,転写しました.
H5ヒストン遺伝子は,鶏のゲノムに複数のコピーで存在し,潜在的な規制メカニズムまたは遺伝子ファミリーを示唆しています.

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