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Re[2]: 2019-nCoV might have originated
from the recombination of a
Pangolin-CoV-like virus with a
Bat-CoV-RaTG13-like virus
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4
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Re: 2019-nCoV might have originated from
the recombination of a Pangolin-CoV-like
virus with a Bat-CoV-RaTG13-like virus
owner:
Prospero
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created:
07.04.2020 - 13:47:11
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Re[3]: 2019-nCoV might have originated from the recombination of a Pangolin-CoV-like virus with a Bat-CoV-RaTG13-like virus
Tu je ku téme ďaľší pekný šupa článok. Ešte teplý.
https://www.biorxiv.org/content/10.1101/2020.03.30.015008v1
Key Points
- RaTG13 is the closest available bat virus to SARS-CoV-2; a sub-lineage of these bat viruses is able to infect humans. Two sister lineages of the RaTG13/SARS-CoV-2 lineage infect Malayan pangolins.
- The sarbecoviruses show a pattern of deep recombination events, indicating that there are high levels of co-infection in horseshoe bats and that the viral pool can generate novel allele combinations and substantial genetic diversity; the sarbecoviruses are efficient ‘explorers’ of phenotype space.
- The SARS-CoV-2 lineage is not a recent recombinant, at least not involving any of the bat or pangolin viruses sampled to date.
- Non-recombinant regions of the sarbecoviruses can be identified, allowing for phylogenetic inference and dating to be performed. We constructed three such regions using different methods.
- We estimate that RaTG13 and SARS-CoV-2 diverged 40 to 70 years ago. There is a diverse unsampled reservoir of generalist viruses established in horseshoe bats.
- While an intermediate host responsible for the zoonotic event cannot be ruled out, the relevant evolution for spillover to humans very likely occurred in horseshoe bats.