Molecular characterization of a synthetic neutralizing antibody targeting p67 of Theileria parva.

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Tác giả: Hannah Chege, Naomi Chege, Chao Chen, Luciano Silva E Costa, Fred Fellouse, Anupriya Gopalsamy, Anna Lacasta, Shane Miersch, Vishvanath Nene, Sachdev S Sidhu, Alex U Singer

Ngôn ngữ: eng

Ký hiệu phân loại: 333.822 Coal

Thông tin xuất bản: United States : Protein science : a publication of the Protein Society , 2025

Mô tả vật lý:

Bộ sưu tập: NCBI

ID: 746640

The Theileria parva sporozoite surface antigen p67 is a target of the bovine humoral immune response that generates antibodies capable of providing protection against subsequent infection. As a result, p67 has been the subject of efforts aimed at the development of an anti-sporozoite subunit vaccine. Previous studies have identified neutralizing epitopes in the N- and C-terminal regions of the full-length protein and shown that immunization with a C-terminal fragment of p67 (p67C) alone is capable of eliciting protection. To identify additional neutralizing epitopes in p67C, selections were conducted against it using a phage-displayed synthetic antibody library. An antibody that neutralized the sporozoite in vitro was identified, and the crystal structure of a Fab:peptide complex was elucidated. Mutagenesis studies aimed at validating and further characterizing the Fab:peptide interaction identified critical residues involved in binding and neutralization. This study also validates distinct epitopes for previously reported neutralizing antibodies.
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