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-Structure paper
| タイトル | Yeast Display Reveals Plentiful Mutations That Improve Fusion Peptide Vaccine-Elicited Antibodies Beyond 59% HIV-1 Neutralization Breadth. |
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| ジャーナル・号・ページ | Vaccines (Basel), Vol. 13, Issue 11, Year 2025 |
| 掲載日 | 2025年10月27日 |
著者 | Camila T França / Sergei Pletnev / Bharat Madan / Phinikoula S Katsamba / Krisha McKee / Nicholas C Morano / Baoshan Zhang / Fabiana Bahna / Tatsiana Bylund / Bob C Lin / Mark K Louder / Seetha Mannepalli / Rajani Nimrania / Sijy O'Dell / Nicole A Doria-Rose / Peter D Kwong / Lawrence Shapiro / Zizhang Sheng / Tongqing Zhou / Brandon J DeKosky / ![]() |
| PubMed 要旨 | : Vaccine elicitation of antibodies with high HIV-1 neutralization breadth is a long-standing goal. Recently, the induction of such antibodies has been achieved at the fusion peptide site of ...: Vaccine elicitation of antibodies with high HIV-1 neutralization breadth is a long-standing goal. Recently, the induction of such antibodies has been achieved at the fusion peptide site of vulnerability. Questions remain, however, as to how much anti-fusion peptide antibodies can be improved and whether their neutralization breadth and potency are sufficient to prevent HIV-1 infection. : Here, we use yeast display coupled with deep mutational screening and biochemical and structural analyses to study the improvement of the best fusion peptide-directed, vaccine-elicited antibody, DFPH_a.01, with an initial 59% breadth. : Yeast display identified both single and double mutations that improved recognition of HIV-1 envelope trimers. We characterized two paratope-distal light chain (LC) mutations, S10R and S59P, which together increased breadth to 63%. Biochemical analysis demonstrated DFPH-a.01_10R59P-LC, and its component mutations, to have increased affinity and stability. Cryo-EM structural analysis revealed elbow-angle influencing by S10R-LC and isosteric positioning by S59P-LC as explanations for enhanced breadth, affinity, and stability. : These results, along with another antibody with enhanced performance (DFPH-a.01_1G10A56K-LC with 64% breadth), suggest that mutations improving DFPH_a.01 are plentiful, an important vaccine insight. |
リンク | Vaccines (Basel) / PubMed:41295471 / PubMed Central |
| 手法 | EM (単粒子) |
| 解像度 | 3.0 Å |
| 構造データ | EMDB-72108, PDB-9q0w: |
| 化合物 | ![]() ChemComp-NAG: |
| 由来 |
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キーワード | VIRAL PROTEIN / antibody improvement / broadly neutralizing antibody / epitope / fusion peptide / HIV-1 vaccine / paratope |
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human immunodeficiency virus 1 (ヒト免疫不全ウイルス)
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