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Updated: Jul 12, 2025

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Glycopeptide Capture for Cell Surface Proteomics
Published on: May 9, 2014
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コンフォーマル・リストリクトド・グリコペプチド・バックボーンは,グリカンとペプチド・モイエティの間のガス相H/Dスクランブルを阻害する
Christian Code1,2, Danwen Qiu1, Ilia A Solov'yov2,3,4,5
1Department of Pharmacy, Faculty of Health and Medical Sciences, University of Copenhagen, 2100 Copenhagen, Denmark.
Journal of the American Chemical Society
|October 26, 2023
まとめ
グリコペプチドの衝突誘発解離 (CID) は,グリカンデウテリウム含有量を明らかにすることができます. しかし,断片化中の水素/デウテリウム (H/D) の混同は,バンコミシンのような形状的に制限された分子とは異なり,ほとんどのグリコプロテインの正確な分析を妨げます.
科学分野:
- 生物化学
- 分析化学
- マススペクトロメトリー
背景:
- タンパク質のグリコシレーションは,翻訳後の一般的な改変である.
- 水素/デュテリウム交換質量スペクトロメトリ (HDX-MS) は,グリコタンパク質の動態を研究する.
- O-リンクされたグリカンにおけるグリカンとペプチドデウテリウム含有量を分離することは困難である.
研究 の 目的:
- グリコペプチドの衝突誘発解離 (CID) 分断を調査する.
- CIDがグリカンデュテリウム含有量を定量化できるかどうかを判断する.
- グリコペプチドの断片化中の水素/デウテリウム (H/D) の混同を評価する.
主な方法:
- 陽子化されたグリコペプチドの衝突誘発解離 (CID).
- グライカンの損失とH/Dスクランブリングの分析
- 形状分析のための分子動力学シミュレーション
主要な成果:
- 完全なH/Dスクランブリングは,典型的なグリコタンパク質のグリカン損失に先立ちます.
- バンコマイシンでは,骨幹の制限により,グリカン分裂は乱れることなく起こる.
- 構造的に制限されたリストセチンおよびその偽アグリコンでは,スクランブルが減少する.
結論:
- CIDは,H/Dスクランブルが制御されている場合,グリカンデュテリウム含有量を決定することができます.
- Glycan-peptide backboneの柔軟性と近接性はH/Dスクランブルに影響する.
- コンフォーメーション的に制限された背骨は,スクランブルを防止し,グリカン分析を可能にします.
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