ArticleScientific reports2026
Glycan-binding properties of SARS-CoV-2 spike proteins: interactions with aminoglycoside antibiotics.
Article in Scientific reports, 2026. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.
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14 authors.
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Abstract
Severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) infects host cells via its spike (S) protein, which binds to the angiotensin-converting enzyme 2 (ACE2) receptor. Glycans are thought to influence this interaction by modulating the binding affinity between the S protein and its receptor. In this study, we screened 300 carbohydrate species using a glycan array to identify potential ligands that interact with the S proteins of the Delta and Omicron variants. Among the identified candidates, two aminoglycoside antibiotics, tobramycin and sisomicin, exhibited notable binding to the S protein. Surface plasmon resonance (SPR), circular dichroism (CD), and in silico docking analyses confirmed direct interactions between these aminoglycosides and the S protein, revealing distinct binding characteristics. Nuclear magnetic resonance (NMR) analysis further localized the tobramycin-binding site within the receptor-binding domain (RBD) of the S protein. Tobramycin and sisomicin showed a tendency to inhibit SARS-CoV-2 replication in human induced pluripotent stem cell (hiPSC)-derived lung organoids, though the effect did not reach statistical significance. Docking simulations using the trimeric S model suggested that aminoglycosides bind at an inter-subunit interface. These findings demonstrate that aminoglycosides can directly interact with the SARS-CoV-2 S protein and may serve as scaffolds for developing host-independent antiviral agents against SARS-CoV-2 and its variants.
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