7MRY
Norovirus T=3 GII.4 HOV VLP
Summary for 7MRY
| Entry DOI | 10.2210/pdb7mry/pdb |
| Related | 7k6v |
| EMDB information | 23960 |
| Descriptor | VP1 (2 entities in total) |
| Functional Keywords | t=3 capsid gii.4 hov norovirus, virus |
| Biological source | Norovirus GII.4 |
| Total number of polymer chains | 3 |
| Total formula weight | 176282.68 |
| Authors | Salmen, W.,Hu, L.,Prasad, B. (deposition date: 2021-05-10, release date: 2022-03-02, Last modification date: 2024-05-29) |
| Primary citation | Hu, L.,Salmen, W.,Chen, R.,Zhou, Y.,Neill, F.,Crowe Jr., J.E.,Atmar, R.L.,Estes, M.K.,Prasad, B.V.V. Atomic structure of the predominant GII.4 human norovirus capsid reveals novel stability and plasticity. Nat Commun, 13:1241-1241, 2022 Cited by PubMed Abstract: Human noroviruses (HuNoVs) cause sporadic and epidemic viral gastroenteritis worldwide. The GII.4 variants are responsible for most HuNoV infections, and GII.4 virus-like particles (VLPs) are being used in vaccine development. The atomic structure of the GII.4 capsid in the native T = 3 state has not been determined. Here we present the GII.4 VLP structure with T = 3 symmetry determined using X-ray crystallography and cryo-EM at 3.0 Å and 3.8 Å resolution, respectively, which reveals unanticipated novel features. A novel aspect in the crystal structure determined without imposing icosahedral symmetry is the remarkable adaptability of the capsid protein VP1 driven by the flexible hinge between the shell and the protruding domains. In both crystal and cryo-EM structures, VP1 adopts a stable conformation with the protruding domain resting on the shell domain, in contrast to the 'rising' conformation observed in recent cryo-EM structures of other GII.4 VLPs. Our studies further revealed that the resting state of VP1 dimer is stabilized by a divalent ion, and chelation using EDTA increases capsid diameter, exposing new hydrophobic and antigenic sites and suggesting a transition to the rising conformation. These novel insights into GII.4 capsid structure, stability, and antigen presentation may be useful for ongoing vaccine development. PubMed: 35273142DOI: 10.1038/s41467-022-28757-z PDB entries with the same primary citation |
| Experimental method | ELECTRON MICROSCOPY (3.8 Å) |
Structure validation
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