末端フォスファットラベル付き核酸は,均質な核酸測定のための改善された基板特性を持つ
Anup Sood1, Shiv Kumar, Satyam Nampalli
1GE Healthcare, 800 Centennial Avenue, Piscataway, New Jersey 08855, USA.
Journal of the American Chemical Society
|February 24, 2005
まとめ
端末染料を含むテトラまたはペンタホスファート核酸は,優れたDNA/RNAポリメラーゼ基板を提供します. 放出される染料は,シーケンシングおよびPCRアプリケーションにおける敏感な検出のための増幅された光信号を提供します.
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.
- 核酸化学 核酸化学について
背景:
- 標準ヌクレオチド三リン酸塩 (NTP) は,DNAおよびRNAポリメラーゼの基板である.
- ヌクレオチドにラベルを貼ることは検出を容易にするが,ポリメラーゼの活性に影響を与える可能性がある.
- ターミナル・フォスファート・ラベリングは,ニュクレオチドの組み込みや分裂時に信号生成のための潜在的な戦略を提供します.
研究 の 目的:
- 端末染料付属のテトラまたはペンタフォスファート核酸塩をポリメラーゼの基板として有用性を評価する.
- 染料の放出とその増幅を含む信号生成メカニズムを調査する.
- 核酸検出と定量化における応用を探求する.
主な方法:
- テトラフォスファートおよびペンタフォスファートヌクレオチドの合成は,端末フォスファートに結合したフッ素性染料を用いて行われます.
- DNAおよびRNAポリメラーゼを使用して基板効率を評価するアッセイ.
- 染料の放出と信号の変化を確認するために,アルカリリンフォスファターゼによる酵素分裂試験.
- 同型単一ヌクレオチドポリモルフィズム (SNP) 検出,DNAシーケンシング,定量的ポリメラーゼ連鎖反応 (PCR) およびローリングサークル増幅 (RCA) の応用試験.
主要な成果:
- 4つ以上のフォスファート (テトラフォスファートまたはペンタフォスファート) を有する核酸は,DNAおよびRNAポリメラーゼの対応するトリフォスファートと比較して優れた基質です.
- 末端のリン酸に付着したフッ素染料は,ポリメラーゼとアルカリリンフォスファタゼの活性によって放出されます.
- 放出された染料は,変化した色と光特性を示し,信号検出を可能にします.
- 増幅された光信号は,少量のテンプレートDNAの検出を可能にします.
- SNP検出,DNAシーケンシング,PCRとRCAの定量化における実証が成功しました.
結論:
- 末端リン酸で標識されたテトラおよびペンタリン酸ヌクレオチドは,核酸ポリメラーゼの有効な基板である.
- 酵素活性に起因する染料の放出は,敏感な検出方法のための強力な信号を提供します.
- これらの新しいヌクレオチドは,シーケンシングと増幅定量化を含む様々な分子診断および研究アプリケーションのための汎用性のあるプラットフォームを提供します.
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