Contrastive learning enables epitope overlap predictions for targeted antibody discovery
Clinton M Holt1,2,3, Alexis K Janke1,4, Parastoo Amlashi1,4
1Vanderbilt Center for Antibody Therapeutics, Vanderbilt University Medical Center, Nashville, TN 37232, USA.
Patterns (New York, N.Y.)
|February 23, 2026
まとめ
Predicting antibody epitopes is crucial for drug development. New computational methods using antibody sequences show high accuracy in identifying overlapping epitopes, aiding therapeutic antibody discovery.
科学分野:
- 免疫学
- 計算生物学
- 構造生物学
背景:
- 正確なエピトープ予測は、治療用抗体開発に不可欠です。
- 現在のエピトープ予測のための計算方法は改善が必要です。
研究 の 目的:
- 抗体配列からの抗体エピトープを予測するための新しい計算アプローチを開発および検証すること。
- エピトープ標的治療用抗体の発見を強化すること。
主な方法:
- 1800万の抗体ペアを分析し、重鎖相補性決定領域3(CDRH3)配列同一性とエピトープ重複を相関させました。
- エピトープ情報を組み込むために、抗体言語モデルの教師あり対照ファインチューニングフレームワークを開発しました。
- エピトープ予測のための汎用モデルであるAbLang-PDBを作成しました。
主要な成果:
- 70%以上の重鎖相補性決定領域3(CDRH3)配列同一性は、V遺伝子を共有する抗体におけるエピトープ重複を予測します。
- Contrastive learningフレームワークは、SARS-CoV-2抗体の構造的重複予測において97%の精度を達成しました。
- AbLang-PDBは、配列ベースの方法と比較して平均適合率で5倍の改善を示し、エピトープ重複との強い相関(ρ = 0.81)を示しました。
- 実験的検証により、選択された候補者の70%のHIV-1特異性と50%の結合競合が示されました。
結論:
- 抗体配列に基づく計算方法は、エピトープ関係を確実に予測できます。
- Contrastive learningは、エピトープ情報を抗体言語モデルに効果的にエンコードします。
- これらのモデルは、エピトープ標的抗体発見を加速するための強力なツールを提供します。
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