CATH superfamily 18.104.22.168
Virus particles are elegant assemblies of protein
Viral Capsids are made of many identical subunits. The whole molecule usually presents as an icosahedral or helical.
The genome in viruses is short. There is not enough genome for encoding a large shell protein. Instead only a small unit is encoded. This small unit will be produced multiple times (for example 60 times). All of the units interact with each other. As a result a symmetrical capsid is formed.
4ar2, 3j69, 3j8f, 3jb0