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"... a recent study under review shows that the genome of the coronavirus isolated from the Malaysian pangolin (Manis javanica) is less similar to SARS-Cov-2, with only 90 percent of genomic concordance. This would indicate that the virus isolated in the pangolin is not responsible for the COVID-19 epidemic currently raging.
However, the coronavirus isolated from pangolin is similar at 99 percent in a specific region of the S protein, which corresponds to the 74 amino acids involved in the ACE (Angiotensin Converting Enzyme 2) receptor binding domain, the one that allows the virus to enter human cells to infect them.
By contrast, the virus RaTG13 isolated from bat R. affinis is highly divergent in this specific region (only 77 percent of similarity). This means that the coronavirus isolated from pangolin is capable of entering human cells whereas the one isolated from bat R. affinis is not.
In addition, these genomic comparisons suggest that the SARS-Cov-2 virus is the result of a recombination between two different viruses, one close to RaTG13 and the other closer to the pangolin virus. In other words, it is a chimera between two pre-existing viruses."
However, the coronavirus isolated from pangolin is similar at 99 percent in a specific region of the S protein, which corresponds to the 74 amino acids involved in the ACE (Angiotensin Converting Enzyme 2) receptor binding domain, the one that allows the virus to enter human cells to infect them.
By contrast, the virus RaTG13 isolated from bat R. affinis is highly divergent in this specific region (only 77 percent of similarity). This means that the coronavirus isolated from pangolin is capable of entering human cells whereas the one isolated from bat R. affinis is not.
In addition, these genomic comparisons suggest that the SARS-Cov-2 virus is the result of a recombination between two different viruses, one close to RaTG13 and the other closer to the pangolin virus. In other words, it is a chimera between two pre-existing viruses."