Genomic determinants of Furin cleavage in diverse European SARS-related bat coronaviruses
A.-L. Sander, A. Moreira-Soto, S. Yordanov, I. Toplak, A. Balboni, R. S. Ameneiros, V. M. Corman, C. Drosten, J. F. Drexler
Abstract
The furin cleavage site in SARS-CoV-2 is unique within the Severe acute respiratory syndrome-related coronavirus (SrC) species. We re-assessed diverse SrC from European horseshoe bats and reveal molecular determinants such as purine richness, RNA secondary structures and viral quasispecies potentially enabling furin cleavage. Furin cleavage thus likely emerged from the SrC bat reservoir via molecular mechanisms conserved across reservoir-bound RNA viruses, supporting a natural origin of SARS-CoV-2.
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