De Novo Discovery of High-Affinity Peptide Binders for the SARS-CoV-2 Spike Protein.

De Novo Discovery of High-Affinity Peptide Binders for the SARS-CoV-2 Spike Protein.
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DOI:
10.1021/acscentsci.0c01309
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发表时间:
2021-01-27
影响因子:
18.2
通讯作者:
Pentelute BL
Pentelute BL
中科院分区:
化学1区
文献类型:
--
作者:
Pomplun S;Jbara M;Quartararo AJ;Zhang G;Brown JS;Lee YC;Ye X;Hanna S;Pentelute BL

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The β-coronavirus SARS-CoV-2 has caused a global pandemic. Affinity reagents targeting the SARS-CoV-2 spike protein are of interest for the development of therapeutics and diagnostics. We used affinity selection–mass spectrometry for the rapid discovery of synthetic high-affinity peptide binders for the receptor binding domain (RBD) of the SARS-CoV-2 spike protein. From library screening with 800 million synthetic peptides, we identified three sequences with nanomolar affinities (dissociation constants Kd = 80–970 nM) for RBD and selectivity over human serum proteins. Nanomolar RBD concentrations in a biological matrix could be detected using the biotinylated lead peptide in ELISA format. These peptides do not compete for ACE2 binding, and their site of interaction on the SARS-CoV-2-spike-RBD might be unrelated to the ACE2 binding site, making them potential orthogonal reagents for sandwich immunoassays. These findings serve as a starting point for the development of SARS-CoV-2 diagnostics or conjugates for virus-directed delivery of therapeutics. Using affinity selection−mass spectrometry, we discovered synthetic peptides with nanomolar affinity for the SARS-CoV-2-spike-RBD and selectivity over human proteins.
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