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関連する2つの偽遺伝子は,山羊のβ-グロービンロカスにおける遺伝子の複製の結果である

M L Cleary, E A Schon, J B Lingrel

|October 1, 1981

まとめ

研究者らは,同一の変異を共有する2つのヤギのβ-グロービン偽遺伝子,psiβ Xとpsiβ Zを特定しました. これらの発見は,これらの非機能的な遺伝子配列の共通の起源と潜在的な規制役割を示唆しています.

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.
進化生物学の進化生物学について

背景:

ベータ・グロービン遺伝子は,酸素輸送に不可欠です.
偽遺伝子は,遺伝子進化の洞察を提供できる非機能的な遺伝子コピーです.
仮遺伝子の形成と機能を理解することは,分子遺伝学において重要である.

研究の目的:

2つのヤギのβ-グロービンの偽遺伝子,psiββXとpsiββZの核酸配列を決定する.
これらの擬似遺伝子を,機能的なヤギのβ-グロービン遺伝子と比較するために.
これらの偽遺伝子の進化的起源と潜在的な機能を調査する.

主な方法:

ヤギのベータ・グロービンの擬似遺伝子の核酸配列解析.
機能性β-グロービン遺伝子 (βAおよびβC) の比較配列解析.
偽遺伝子内の特定の突然変異の識別と分析.

主要な成果:

ヤギのpsi beta Xとpsi beta Zの擬似遺伝子のヌクレオチド配列が決定されました.
両偽遺伝子は,ATAボックス,エクソン1フレームシフト,IVS1スプライスサイトの変異を含む,同一の有害な変異を共有しています.
配列の比較は,偽遺伝子が共通の欠陥のある前駆体から発生し,単一の遺伝子複製イベントから発生した可能性があることを示唆しています.

結論:

羊の2つのベータ・グロービン擬似遺伝子は,共通の祖先の欠陥配列から進化した可能性が高い.
特定された変異は,psi beta Xとpsi beta Zの共通の起源を示しています.
これらの擬似遺伝子の持続と重複は,遺伝子調節や遺伝子間隔器としての役割を示唆する可能性がある.

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