Cell Reports (Oct 2021)

Paired heavy- and light-chain signatures contribute to potent SARS-CoV-2 neutralization in public antibody responses

  • Bailey B. Banach,
  • Gabriele Cerutti,
  • Ahmed S. Fahad,
  • Chen-Hsiang Shen,
  • Matheus Oliveira De Souza,
  • Phinikoula S. Katsamba,
  • Yaroslav Tsybovsky,
  • Pengfei Wang,
  • Manoj S. Nair,
  • Yaoxing Huang,
  • Irene M. Francino-Urdániz,
  • Paul J. Steiner,
  • Matías Gutiérrez-González,
  • Lihong Liu,
  • Sheila N. López Acevedo,
  • Alexandra F. Nazzari,
  • Jacy R. Wolfe,
  • Yang Luo,
  • Adam S. Olia,
  • I-Ting Teng,
  • Jian Yu,
  • Tongqing Zhou,
  • Eswar R. Reddem,
  • Jude Bimela,
  • Xiaoli Pan,
  • Bharat Madan,
  • Amy D. Laflin,
  • Rajani Nimrania,
  • Kwok-Yung Yuen,
  • Timothy A. Whitehead,
  • David D. Ho,
  • Peter D. Kwong,
  • Lawrence Shapiro,
  • Brandon J. DeKosky

Journal volume & issue
Vol. 37, no. 1
p. 109771

Abstract

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Summary: Understanding mechanisms of protective antibody recognition can inform vaccine and therapeutic strategies against SARS-CoV-2. We report a monoclonal antibody, 910-30, targeting the SARS-CoV-2 receptor-binding site for ACE2 as a member of a public antibody response encoded by IGHV3-53/IGHV3-66 genes. Sequence and structural analyses of 910-30 and related antibodies explore how class recognition features correlate with SARS-CoV-2 neutralization. Cryo-EM structures of 910-30 bound to the SARS-CoV-2 spike trimer reveal binding interactions and its ability to disassemble spike. Despite heavy-chain sequence similarity, biophysical analyses of IGHV3-53/3-66-encoded antibodies highlight the importance of native heavy:light pairings for ACE2-binding competition and SARS-CoV-2 neutralization. We develop paired heavy:light class sequence signatures and determine antibody precursor prevalence to be ∼1 in 44,000 human B cells, consistent with public antibody identification in several convalescent COVID-19 patients. These class signatures reveal genetic, structural, and functional immune features that are helpful in accelerating antibody-based medical interventions for SARS-CoV-2.

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