This web site describes the various icosahedral virus capsid structures in
the Protein Data Bank (PDB) in terms of their complete capsids, and detailed structural
and computational analysis.
The protomeric coordinates (asymmetric unit) were transformed and stored
in a single icosahedral convention (2(Z)-3-5-(X)2).
Coordinates (sometimes) were further processed by rearranging the
nucleic acid residues, hetero atoms, and water molecules (if present) at the
end of the protein chains for the ease of further analysis.
Structures are classified in terms of their quasi-symmetry
(e.g. T=3, T=4, T=7) and pseudo-symmetry (e.g., P=3).
Tools are being developed to study the capsids in terms of structural,
energetic, and assembly aspects. The derived results are made available throught
You are welcome to download the figures and the data
presented at this website. Please cite the reference and the VIPERdb website when you use
them in the publications/ posters/ presentations. Thank you for your cooperation.