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Updated: Jul 20, 2026
12:31
In Vivo Modeling of the Morbid Human Genome using Danio rerio
Published on: August 24, 2013
性を決定する遺伝子の進化的保存の証拠
C S Raymond1, C E Shamu, M M Shen
1Institute of Human Genetics, Department of Biochemistry, University of Minnesota Medical School, Minneapolis 55455, USA.
Nature
|March 7, 1998
まとめ
保存された遺伝子ファミリーであるDMドメインは,多様な動物群の性発達を調節する. この発見は,メタゾーンにおける性決定機構の共通の進化的起源を示唆している.
科学分野:
- 分子生物学は分子生物学である.
- 発達生物学 発達生物学について
- 進化生物学の進化生物学について
背景:
- ほとんどのメタゾアには2つの性別があるが,性決定のメカニズムは,フィラ全体で非常に異なると考えられていた.
- 以前の分子分析では,さまざまな動物集団が性特性を確立する方法の有意な違いが示唆されていた.
研究 の 目的:
- 性を決定する遺伝子の進化的保存を調査する.
- 異なる動物系における性調節の基礎となる共通の分子機構を特定する.
主な方法:
- Caenorhabditis elegans.から男性性調節遺伝子 mab-3 の分離と特徴付け.
- Drosophila melanogasterのダブルセックス (dsx) 遺伝子とのマブ-3の比較分析.
- DMドメインを含むヒトの同位体であるDMT1の識別と発現分析.
主要な成果:
- C. elegans mab-3遺伝子は,構造的にも機能的にもD. melanogaster dsx遺伝子と関連しています.
- 両方の遺伝子は",DMドメイン"と呼ばれる保存されたDNA結合モチーフを持つタンパク質をコードする.
- DMドメインのタンパク質は,性特異性ニューロブラストの分化と卵黄タンパク質の遺伝子転写を両種で調節し,種間機能保存の証拠がある.
結論:
- 性調節の重要な側面の共通の進化的起源は,保存されたDM領域によって示唆されています.
- ヒトのDMドメイン遺伝子 (DMT1) の識別は,丸で発現し,XY性逆転に関連した領域の近くに位置し,哺乳類の性発達における役割を暗示しています.
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