人間のY染色体:ユークロマティック領域にわたる重複するDNAクローン

S Foote¹, D Vollrath, A Hilton

¹Howard Hughes Research Laboratories, Whitehead Institute, Cambridge, MA.

Science (New York, N.Y.)

|October 2, 1992

まとめ

科学者たちは,酵母人工染色体 (YAC) クローンを用いて,ヒトY染色体の詳細な物理的な地図を作成しました. この包括的な地図は,Y染色体のほとんどをカバーし,将来の遺伝学研究に役立ちます.

科学分野:

遺伝学遺伝学とは
ゲノミクスゲノミクスとは
分子生物学は分子生物学である.

背景:

Y染色体は,男性の性別決定と生育能力において重要な役割を果たします.
詳細な物理的な地図は,Y染色体の構造と機能を理解するために不可欠です.
以前の地図作成の取り組みは,解像度とカバー度が限られていた.

研究の目的:

人間のY染色体の高解像度物理マップを構築する.
ユークロマティック領域のDNAロシを特定し,並べ替える.
Y染色体遺伝学と進化に関するさらなる研究を促進するため.

主な方法:

人間のゲノムDNAから酵母人工染色体 (YAC) ライブラリを作成.
シーケンスタグのサイトを検索するために,YACライブラリをスクリーニングします.
オーダーされた配列に重複するYACクローンのアセンブリ.
Y染色体DNAロキの割り当てを,秩序付けられた間隔で行う.

主要な成果:

Y染色体のユークロマティック部分の98%以上が物理的にマッピングされました.
合計207のY染色体DNAロキが127のオーダーされた間隔に割り当てられました.
オーダーされたランドマークは,平均220キロベースの距離で達成されました.
地図は,X同型,Y特異的な反復性,および単一コピーDNA配列の複雑な配列を明らかにしました.

結論:

生成された物理マップは,ヒトY染色体の密度の高い枠組みを提供します.
この地図は,Y染色体遺伝子とその組織の研究を大幅に前進させる.
詳細なマップは,ヒトの遺伝学とY染色体関連疾患の研究を加速させると期待されています.

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