新しいOGT基板のマイクロアレイ発見:メドゥロブラストーマ腫瘍遺伝子OTX2はO-GlcNAcylatedである
Rodrigo F Ortiz-Meoz1, Yifat Merbl, Marc W Kirschner
1Department of Microbiology and Immunobiology, and ‡Department of Systems Biology, Harvard Medical School , Boston, Massachusetts 02115, United States.
Journal of the American Chemical Society
|March 4, 2014
まとめ
研究者は,タンパク質マイクロアレイを使用して,O-GlcNAc移転酵素 (OGT) の新しい標的を特定しました. この方法により,転写因子OTX2が新しいOGT基質として発見され,脳発育と腫瘍生成に不可欠である.
科学分野:
- バイオケミストリー バイオケミストリー
- 分子生物学は分子生物学である.
- グライコバイオロジーは,
背景:
- O-GlcNAcトランスファーゼ (OGT) は,生涯にわたって細胞のプロセスを調節する重要な酵素です.
- OGT基板を特定することは,その複雑な生物学的役割を理解するために不可欠です.
研究 の 目的:
- 新規のOGT基板を発見するための高スループットメソッドの開発と検証.
- 新しいOGTターゲット,特に特定の発達または疾患の文脈で表現されるものを特定します.
主な方法:
- 大規模なOGT基板発見のためにタンパク質マイクロアレイのアプローチを使用しました.
- O-GlcNAcの質量タグ付けと in vitro トランスクリプション-トランスレーションを組み合わせた迅速な検証戦略を採用しました.
主要な成果:
- マイクロアレイプラットフォームを使用して新規のOGT基板を成功裏に特定しました.
- 新しいOGT基板として,重要な発達転写因子および腫瘍遺伝子のOrtodenticle homeobox 2 (OTX2) を検証しました.
- 髄芽細胞細胞における内生的なOTX2のO-GlcNAcylationが実証されている.
結論:
- 質量標識と組み合わせたタンパク質マイクロアレイは,生物学的に重要なOGT基板を発見するための効果的な戦略を提供します.
- このアプローチは,OTX2.2.のような制限された表現パターンを持つものを含む,OGT基板を識別することができます.
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