The Sato Lab (Kei Sato)

@systemsvirology.bsky.social

Professor, Division of Systems Virology, The Institute of Medical Science, The University of Tokyo Founder, The Genotype to Phenotype Japan (G2P-Japan) Consortium Representative Director, G2P-Japan Association Lab website: https://x.gd/1Z1lW

Here is the Sato Lab, 2025😎! 🇨🇳🇯🇵🇨🇳🇯🇵🇯🇵🇯🇵🇯🇵🇰🇷🇯🇵🇯🇵🇯🇵🇨🇳🇬🇷🇯🇵🇯🇵🇯🇵🇯🇵🇹🇭🇨🇭🇹🇭🇯🇵🇯🇵🇹🇭🇯🇵🇯🇵🇵🇭🇯🇵🇯🇵🇯🇵🇮🇩🇯🇵🇨🇳🇨🇳

Bild

What a shame. I am just taking about the possibility for scientific collaboration with US scientists. Why the conspiracy theory people in X simplistically talk about “GOF” experiments? I have never talked about such topics before.

Bild
The Sato Lab (Kei Sato)@systemsvirology.bsky.social · last yr.

For US🇺🇸 scientists/virologists🦠 - if you want to find better ways for your science and career, please let me know. Let us find better ways. Please do repost/retweet

A new preprint is out at biorxiv! Here we performed round-robin pseudovirus experiments using 53 sarbecoviruses🦠 and ACE2s from 17 mammals to elucidate the ACE2 tropism of sarbecoviruses in natural hosts🦇, potential intermediate hosts🦫 and humans👤 www.biorxiv.org/content/10.1...

Molecular basis of sarbecovirus evolution and receptor tropism in natural hosts, potential intermediate hosts, and humans

The spike protein of many sarbecoviruses binds to the angiotensin-converting enzyme 2 (ACE2) receptor and facilitates viral entry. The diversification of the sarbecovirus spike gene and the mammalian ACE2 gene suggests that sarbecoviruses and their hosts have co-evolved, and the genetic diversity in these genes affects the host tropism of sarbecoviruses. Better comprehending the evolutionary potential of sarbecoviruses can lead to preparedness for the next pandemic. However, the host tropism of sarbecoviruses is not fully understood. Here, we performed round-robin pseudovirus infection assays using 53 sarbecoviruses and ACE2s from 17 mammals to elucidate the ACE2 tropism of sarbecoviruses in natural hosts, potential intermediate hosts and humans. We determined the factors responsible for the ACE2 tropism of sarbecoviruses through structural, phylogenetic analyses, and infection experiments, revealing which substitutions can expand the host range of sarbecoviruses. These results highlight the mechanisms modulating host tropism throughout sarbecovirus evolution. ### Competing Interest Statement Spyros Lytras has received consulting fees from EcoHealth Alliance. Jumpei Ito has consulting fees from Moderna Japan Co., Ltd. Kei Sato has consulting fees from Moderna Japan Co., Ltd. and Takeda Pharmaceutical Co. Ltd., and honoraria for lectures from Moderna Japan Co., Ltd. and Shionogi & Co., Ltd. The other authors declare no competing interests. All authors have submitted the ICMJE Form for Disclosure of Potential Conflicts of Interest. Conflicts that the editors consider relevant to the content of the manuscript have been disclosed.

biorxiv.org

Here's the latest variant picture with a global scope. The big news this week was the emergence of BA.3.2, a saltation evolving for around 3 years in a chronic case and now transmitting in South Africa. Here’s my thread on BA.3.2: bsky.app/profile/mike... 🧵

Mike Honey@mikehoney.bsky.social · last yr.

The latest example of a potential new variant evolving in a long-term chronic infection has been detected. As Ryan H describes on this thread, it is descended from the BA.3 lineage. #COVID19 #BA_3 🧵