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-Structure paper
タイトル | Antibody-directed evolution reveals a mechanism for enhanced neutralization at the HIV-1 fusion peptide site. |
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ジャーナル・号・ページ | Nat Commun, Vol. 14, Issue 1, Page 7593, Year 2023 |
掲載日 | 2023年11月21日 |
著者 | Bailey B Banach / Sergei Pletnev / Adam S Olia / Kai Xu / Baoshan Zhang / Reda Rawi / Tatsiana Bylund / Nicole A Doria-Rose / Thuy Duong Nguyen / Ahmed S Fahad / Myungjin Lee / Bob C Lin / Tracy Liu / Mark K Louder / Bharat Madan / Krisha McKee / Sijy O'Dell / Mallika Sastry / Arne Schön / Natalie Bui / Chen-Hsiang Shen / Jacy R Wolfe / Gwo-Yu Chuang / John R Mascola / Peter D Kwong / Brandon J DeKosky / |
PubMed 要旨 | The HIV-1 fusion peptide (FP) represents a promising vaccine target, but global FP sequence diversity among circulating strains has limited anti-FP antibodies to ~60% neutralization breadth. Here we ...The HIV-1 fusion peptide (FP) represents a promising vaccine target, but global FP sequence diversity among circulating strains has limited anti-FP antibodies to ~60% neutralization breadth. Here we evolve the FP-targeting antibody VRC34.01 in vitro to enhance FP-neutralization using site saturation mutagenesis and yeast display. Successive rounds of directed evolution by iterative selection of antibodies for binding to resistant HIV-1 strains establish a variant, VRC34.01_mm28, as a best-in-class antibody with 10-fold enhanced potency compared to the template antibody and ~80% breadth on a cross-clade 208-strain neutralization panel. Structural analyses demonstrate that the improved paratope expands the FP binding groove to accommodate diverse FP sequences of different lengths while also recognizing the HIV-1 Env backbone. These data reveal critical antibody features for enhanced neutralization breadth and potency against the FP site of vulnerability and accelerate clinical development of broad HIV-1 FP-targeting vaccines and therapeutics. |
リンク | Nat Commun / PubMed:37989731 / PubMed Central |
手法 | EM (単粒子) / X線回折 |
解像度 | 1.49 - 2.7 Å |
構造データ | EMDB-28617, PDB-8euu: EMDB-28618, PDB-8euv: EMDB-28619, PDB-8euw: PDB-8eli: PDB-8f7z: |
化合物 | ChemComp-HOH: ChemComp-NAG: |
由来 |
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キーワード | IMMUNE SYSTEM / HIV / VRC34 / Fusion peptide / broadly neutralizing / VIRAL PROTEIN/ IMMUNE SYSTEM / broadly neutralizing antibody / HIV-1 / glycoprotein / viral protein / FP-targeting vaccines / VIRAL PROTEIN- IMMUNE SYSTEM complex / VIRAL PROTEIN/IMMUNE SYSTEM / VIRAL PROTEIN-IMMUNE SYSTEM complex / FP-NEUTRALIZING ANTIBODY |