Friday, May 29, 2020

COVID-19:A close relative of SARS-CoV-2 found in bats offers more evidence it evolved naturally.

COVID-19:A close relative of SARS-CoV-2 found in bats offers more evidence it evolved naturally.There is ongoing debate among policymakers and the general public about where SARS-CoV-2, the virus that causes COVID-19, came from. While researchers consider bats the most likely natural hosts for SARS-CoV-2, the origins of the virus are still unclear. On May 10 in the journal Current Biology, researchers describe a recently identified bat coronavirus that is SARS-CoV-2's closest relative in some regions of the genome and which contains insertions of amino acids at the junction of the S1 and S2 subunits of the virus's spike protein in a manner similar to SAR-CoV-2. While it's not a direct evolutionary precursor of SARS-CoV-2, this new virus, RmYN02, suggests that these types of seemingly unusual insertion events can occur naturally in coronavirus evolution, the researchers say.

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