3 ms·

I don't think that there are any Sarbecoronaviruses other than SARS2 that have an FCS. This paper from 2021 supports that conclusion [1]. There are other Coro

I don't think that there are any Sarbecoronaviruses other than SARS2 that have an FCS. This paper from 2021 supports that conclusion [1]. There are other Coronaviruses that have an FCS, but not Sarbecoronaviruses, and none of them use PRRA. Those twelve amino acids have essentially come out of nowhere. [1]https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7836551/ https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7836551/

lamontcg 4y ago
None of the FCS in that paper are the same: RRAR, RTAR, RSVR, RVRR, RSGR, RRSRR, RRSR, RAKR, RAHR, RRKRR. There's clearly an awful lot of functional sequences that we know of that produce an FCS and uniqueness there isn't special. You're right that I wrote sarbecoviruses when I meant beta-coronaviruses. We still don't know of any sarbecoviruses with an FCS, but MERS has an FCS and the bat beta-coronaviruses HKU4 and HKU5 have an FCS.