植物のメッセンジャーRNAの局所化は,Xenopusの卵細胞の340ntのRNA配列要素によって導かれています

K L Mowry¹, D A Melton

¹Department of Biochemistry and Molecular Biology, Harvard University, Cambridge, MA 02138.

Science (New York, N.Y.)

|February 21, 1992

まとめ

Xenopusの卵にある特定のRNA配列は,Vg1 mRNAの植物の極点への局所化を指示する. このメカニズムは,胚形成初期における発達運命を特定するのに極めて重要です.

科学分野:

発達生物学発達生物学とは
分子生物学は分子生物学である.
遺伝学遺伝学とは

背景:

受精卵には,生物全体を特定するためのすべての情報が含まれています.
初期の胚細胞は,潜在的に局所化された情報分子が原因で,異なる運命を手に入れる.
XenopusのVg1RNAのように,母性mRNAの局所化メカニズムを理解することは,発達信号を解読する鍵です.

研究の目的:

植物極へのVg1RNAトランスロケーションのメカニズムをXenopus卵細胞で調査する.
植物のポール局所化に責任を負う特定のRNA要素を特定する.
局所的な母性mRNAが,胚の極性および細胞の運命を確立するのにどのように貢献するのかを理解する.

主な方法:

Vg1RNAの3'未翻訳領域 (UTR) の分析.
Xenopusの卵細胞におけるRNA局所化アッセイ.
RNAの局所化を指示するのに十分な特定の配列の識別.

主要な成果:

Vg1 RNAの3' UTR内の340核酸配列は,重要な局所化信号として識別されました.
この特定の配列は,RNAの局所化をXenopusの卵細胞の植物極に誘導するのに十分である.
発達初期における母親のmRNAの局所化におけるcis作用要素の役割を示しています.

結論:

Vg1 RNAの3' UTRには,植物極を標的とするのに十分な強力な局所化信号が含まれています.
この発見は,母性の要因が卵の中で空間的にどのように組織されているかを理解するための分子基盤を提供します.
RNAの局所化のメカニズムは,細胞の極性を確立し,発達パターンを開始するために不可欠です.

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