9VG7

Cryo-EM Structure of Rc-o319 Ectodomain trimer

Summary for 9VG7

• Entry DOI: 10.2210/pdb9vg7/pdb
• EMDB information: 65045
• Descriptor: Spike glycoprotein, 2-acetamido-2-deoxy-beta-D-glucopyranose-(1-4)-2-acetamido-2-deoxy-beta-D-glucopyranose, beta-D-mannopyranose-(1-4)-2-acetamido-2-deoxy-beta-D-glucopyranose-(1-4)-2-acetamido-2-deoxy-beta-D-glucopyranose, ... (4 entities in total)
• Functional Keywords: complex, viral protein
• Biological source: Homo sapiens (human)
• Total number of polymer chains: 3
• Total formula weight: 396259.60

Authors

Matsumoto, K.,Shihoya, W.,Nureki, O. (deposition date: 2025-06-13, release date: 2025-08-27, Last modification date: 2025-10-15)

Primary citation

Kosugi, Y.,Matsumoto, K.,Lytras, S.,Plianchaisuk, A.,Tolentino, J.E.,Fujita, S.,Yo, M.S.,Luo, C.,Kim, Y.,Shihoya, W.,Ito, J.,Nureki, O.,Sato, K.
Molecular basis of sarbecovirus evolution and receptor tropism in natural hosts, potential intermediate hosts, and humans.
Cell Rep, 44:116220-116220, 2025

PubMed Abstract: 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 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 and 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.

PubMed: 40934083
DOI: 10.1016/j.celrep.2025.116220

Experimental method

ELECTRON MICROSCOPY (2.55 Å)