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. 2023 Oct 16;14:6516. doi: 10.1038/s41467-023-42146-0

Fig. 4. Modeling of M4 bound on GII.4 capsid in the “resting” and “raised” states.

Fig. 4

ad Top view and side view of superimposition of M4-GII.4 P-domain complex onto the AB dimer of HOV VLP cryo-EM structure (PDB ID:7MRY) in “resting” state. eh Top and side view of M4-GII.4 P-domain complex superimposed on the AB dimer of the VLP in the “raised” state, which was modeled in 8.0 Å GII.4c cryo-EM map in T = 3 symmetry (EMD-10756). The VP1 subunits are colored (M4 bound dimer, magenta; neighboring dimer, blue). Nanobody M4 is shown in green. i Schematic of M4 neutralization mechanism. Cartoon representation of the capsid (designed using Adobe Illustrator) in the resting (as in a) and the raised state (as in e) shown with P-domain dimers in blue, S domain in green, and linker region in red. j Negative-stain EM analysis of GII.4 and GII.3 VLPs in the presence or absence of M4.