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Receptor-binding proteins from animal viruses are broadly compatible with human cell entry factors
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Receptor-binding proteins from animal viruses are broadly compatible with human cell entry factors
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Receptor-binding proteins from animal viruses are broadly compatible with human cell entry factors
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Journal Article
Receptor-binding proteins from animal viruses are broadly compatible with human cell entry factors
2025
Overview
Cross-species transmission of animal viruses poses a threat to human health. However, systematic experimental assessments of these risks remain scarce. A critical step in viral infection is cellular internalization mediated by viral receptor-binding proteins (RBPs). Here we constructed viral pseudotypes bearing the RBPs of 102 enveloped RNA viruses and assayed their infectivity across 5,202 RBP-cell combinations. This showed that most of the tested viruses have the potential to enter human cells. Pseudotype infectivity varied widely among the 14 viral families examined and was influenced by RBP characteristics, host of origin and target cell type. Cellular gene expression data revealed that the availability of specific cell-surface receptors is not necessarily the main factor limiting viral entry and that additional host factors must be considered. Altogether, these results suggest weak interspecies barriers in the early stages of infection and advance our understanding of the molecular interactions driving viral zoonosis.
