クローン化されたcDNAとタンパク質の配列から推論された2つの主要なコリオン多遺伝子ファミリーの進化

C W Jones, N Rosenthal, G C Rodakis

Cell

|December 1, 1979

まとめ

研究者は,シルクモスのコリオンの遺伝子配列を分析し,タンパク質ファミリーAとBの洞察を明らかにした. 遺伝子進化には,特定の領域内の配列の変化が含まれ,機能的な専門性を示唆している.

科学分野:

分子生物学は分子生物学である.
進化遺伝学の進化遺伝学について
バイオケミストリーバイオケミストリー

背景:

シルクモスであるAntheraea polyphemusは,複雑なコリオン (卵殻) タンパク質を持っています.
コリオンタンパク質は,A級とB級のマルチ遺伝子ファミリーによってコードされます.
遺伝子ファミリーの進化を理解することは,タンパク質の多様化に関する洞察を提供します.

研究の目的:

Antheraea polyphemusからコリオンのcDNAクローンの配列を特徴づけるために.
クラスAおよびクラスBのコレオンタンパク質遺伝子ファミリーの特徴を定義する.
これらの遺伝子ファミリーを形作る進化的メカニズムを調査する.

主な方法:

6つのコリオンのcDNAクローンの配列決定.
確認されたクローンの比較シーケンス分析.
配列領域と進化パターンの識別.

主要な成果:

6つのコリオンのcDNAクローンの完全なまたは部分的な配列が得られた.
暗号化されたタンパク質は,主要なクラスAおよびクラスBのホリオンタンパク質ファミリーに属しています.
配列の比較により,局所的な分岐と繰り返しの領域が明らかになり,削除や挿入などの進化的メカニズムが示唆されました.

結論:

この研究は,シルクモスのコリオン遺伝子ファミリーの重要な特徴を定義しています.
シーケンスディバージェンスはドメイン特異であり,機能的差異化を示唆します.
削除や挿入などの進化過程は,これらの遺伝子内の繰り返し領域の拡大と収縮に寄与する.

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