マイクロRNAは,古典的な進化のホットスポットの効果遺伝子である

Shen Tian¹, Yoshimasa Asano^2,3, Tirtha Das Banerjee¹

¹Department of Biological Sciences, Faculty of Science, National University of Singapore, Singapore, Singapore.

Science (New York, N.Y.)

|December 5, 2024

まとめ

ミクロRNA mir-193が蝶やのメラニックな翼色の進化を促していますこの小さなRNAは象牙と呼ばれる長い非コーディングRNAから派生し染色遺伝子を抑制し適応進化の新たなメカニズムを明らかにします

科学分野:

進化の遺伝学
発達生物学
分子遺伝学

背景:

レピドプテラの皮質遺伝子付近のゲノム領域はメラニック翼色進化のホットスポットとして知られています
広範な研究にもかかわらず,この適応性特性に起因する特定の遺伝子は未だに特定されていません.

研究の目的:

レピドプテラの皮質の色進化を調節するエフェクター遺伝子を特定する.
ドロソフィラなどの他の種におけるこのエフェクターの保存された役割を調査する.

主な方法:

レピドプテラの皮質の比較ゲノム解析
候補遺伝子とマイクロRNAの役割をテストする機能的アッセイ
制御要素とその標的を特定するためのRNAシーケンシング

主要な成果:

皮質を含む4つのタンパク質をコードする遺伝子は,主要な効果因子として特定されなかった.
ミクロRNA (mir-193) は,様々な蝶の系統にわたるメラニック色調を調節する重要なエフェクタとして特定されました.
mir-193は主要な非コーディングRNAである象牙から派生し,色素遺伝子を抑制することによって機能する.
配色における mir - 193 の機能はドロソフィラに保存された.

結論:

マイクロRNA mir-193は,レピドプテラの適応性メラニック翼色進化の主な原動力である.
この発見は,進化過程におけるノンコーディングRNAの重要な役割を強調しています.
この研究は,マイクロRNAが動物における適応的進化を繰り返し推進できることを示しています.

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