マスクロマトグラムの二次元分析による非正規のRNAの双方向的直接シーケンシング
Anders Björkbom1,2,3, Victor S Lelyveld1,2, Shenglong Zhang1
1Howard Hughes Medical Institute , Department of Molecular Biology and Center for Computational and Integrative Biology, Massachusetts General Hospital, 185 Cambridge Street, Boston, Massachusetts 02114, United States.
Journal of the American Chemical Society
|October 27, 2015
まとめ
この研究は,RNAシーケンシングのための複雑な質量スペクトロメトリ (MS) のデータを簡素化します. 液体クロマトグラフィーとモンテカルロアルゴリズムを用いた新しい方法は,改変された核酸でRNAの堅固なデノボシーケンシングを可能にします.
科学分野:
- 生物化学と分子生物学
- 分析化学
- バイオ情報学
背景:
- 質量スペクトロメトリ (MS) は,配列化方法を補完して,RNAの改変を特徴付けるための貴重な化学情報を提供します.
- RNA断片のMSスペクトルの解釈は,複数の断片化経路とアダクトによる複雑性のために困難です.
- 既存の方法は,非正規の核塩基を含むRNAの正確なde novo配列化に苦労しています.
研究 の 目的:
- RNA分析における複雑な質量スペクトロメトリーデータを簡素化する方法を開発する.
- 化学的変更を含む小さなRNAの堅固なデノボシーケンシングを可能にします.
- RNA配列内の改変された核酸の識別と局所化を容易にする.
主な方法:
- 最適化されたRNAダイジェストの液体染色体 (LC) 分離で予測可能な規則性を利用した.
- 抽出された化合物染色体の二次元分析を用いた.
- 自動双方向ペアエンドの読み取り生成のための新しいモンテカルロアルゴリズムを開発した.
主要な成果:
- 複雑なMSデータの解釈を大幅に簡素化しました.
- 非正規の核酸を含むRNAの直接的かつ堅固なデノボシーケンシングを達成した.
- RNA配列内の改変された核酸の位置を正確に特定しました.
結論:
- 開発されたLC-MSアプローチは,修飾されたRNAのルーチンシーケンシングを可能にします.
- この方法は,人工的および自然に発生する転写後の改変を有するオリゴヌクレオチドに適用できます.
- データ分析の進歩により,RNAの化学的多様性の特徴が著しく向上しています.
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