The structure of pariacoto virus reveals a dodecahedral cage of duplex RNA.Tang, L., Johnson, K.N., Ball, L.A., Lin, T., Yeager, M., Johnson, J.E.
(2001) Nat Struct Biol 8: 77-83
- PubMed: 11135676
- DOI: https://doi.org/10.1038/83089
- Primary Citation of Related Structures:
- PubMed Abstract:
The 3.0 A resolution crystal structure of Pariacoto virus (PaV) reveals extensive interactions between portions of the viral RNA genome and the icosahedral capsid. Under the protein shell of the T = 3 quasi equivalent capsid lies a dodecahedral cage composed of RNA duplex that accounts for approximately 35% of the single-stranded RNA genome. The highly basic N-terminal regions (residues 7-54) of the subunits, forming pentamers (A subunits) are clearly visible in the density map and make numerous interactions with the RNA cage. The C-terminal segments (residues 394-401) of the A subunits lie in channels near the quasi three-fold axes. Electron cryo-microscopy and image reconstruction of PaV particles clearly show the dodecahedral RNA cage.
Department of Molecular Biology, The Scripps Research Institute, 10550 North Torrey Pines Road, La Jolla, California 92037, USA.