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  2. Capsid - Wikipedia

    en.wikipedia.org/wiki/Capsid

    Icosahedral capsid of an adenovirus Virus capsid T-numbers. The icosahedral structure is extremely common among viruses. The icosahedron consists of 20 triangular faces delimited by 12 fivefold vertexes and consists of 60 asymmetric units. Thus, an icosahedral virus is made of 60N protein subunits.

  3. Virus crystallisation - Wikipedia

    en.wikipedia.org/wiki/Virus_Crystallisation

    In terms of optimising the ratio of number of required protein sub-assemblies and the surface area enclosed, icosahedral symmetry is again found to be the smallest and most efficient symmetry to adopt. [11] Icosahedral capsid structure is an optimal design for encasing material due to its geometric and symmetric properties, lending to its ...

  4. Icosahedral symmetry - Wikipedia

    en.wikipedia.org/wiki/Icosahedral_symmetry

    Icosahedral symmetry fundamental domains A soccer ball, a common example of a spherical truncated icosahedron, has full icosahedral symmetry. Rotations and reflections form the symmetry group of a great icosahedron. In mathematics, and especially in geometry, an object has icosahedral symmetry if it has the same symmetries as a regular icosahedron.

  5. Icosahedron - Wikipedia

    en.wikipedia.org/wiki/Icosahedron

    A regular icosahedron is topologically identical to a cuboctahedron with its 6 square faces bisected on diagonals with pyritohedral symmetry. The icosahedra with pyritohedral symmetry constitute an infinite family of polyhedra which include the cuboctahedron, regular icosahedron, Jessen's icosahedron, and double cover octahedron. Cyclical ...

  6. Major capsid protein VP1 - Wikipedia

    en.wikipedia.org/wiki/Major_capsid_protein_VP1

    VP1 is the major structural component of the polyomavirus icosahedral capsid, which has T=7 symmetry and a diameter of 40-45 nm. The capsid contains three proteins; VP1 is the primary component and forms a 360-unit outer capsid layer composed of 72 pentamers.

  7. Sedoreoviridae - Wikipedia

    en.wikipedia.org/wiki/Sedoreoviridae

    Reoviruses are non-enveloped and have an icosahedral capsid composed of an outer (T=13) and inner (T=2) protein shell. [1] [8] Ultrastructure studies show that virion capsids are composed of two or three separate layers which depends on species type. The innermost layer (core) has T=1 icosahedral symmetry and is composed of 60 different types ...

  8. Double-stranded RNA viruses - Wikipedia

    en.wikipedia.org/wiki/Double-stranded_RNA_viruses

    Apart from RdRp, viruses in Duplornaviricota also share icosahedral capsids that contain 60 homo- or heterodimers of the capsid protein organized on a pseudo T=2 lattice. The phylum is divided into three classes: Chrymotiviricetes , which primarily contains fungal and protozoan viruses, Resentoviricetes , which contains reoviruses, and ...

  9. Parvoviridae - Wikipedia

    en.wikipedia.org/wiki/Parvoviridae

    Schematic diagram of a Parvoviridae virion A diagram of the canine parvovirus's capsid, containing 60 monomers of the capsid protein. Parvovirus virions are 23–28 nanometers (nm) in diameter and consist of the genome enclosed inside a capsid that is icosahedral in shape with a rugged surface. The capsid is composed of 60 structurally ...