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capsid

capsid

1 8.4
A shell of proteins that surrounds the virus's genes
  • noun
  • /ˈkæpsɪd/
  • Specialized
: cápside
  • The capsid is the protective protein shell that surrounds the virus's genetic material.
  • capsid protein
  • capsid gene
  • capsid assembly

Examples

  • Outside its cellular host, the viral genome would disintegrate without the protection of its coat, the capsid.

    Academic text (2004)
  • The aim was to derive the optimal capsid energy spectrum.

    Academic text (2004)
  • Such a capsid, being the wrong size, would no longer provide the right, tight fit for the genome.

    Academic text (2004)
  • To see why, consider a capsid that has just one more capsomer than the number M at a minimum.

    Academic text (2004)
  • But if the capsid were too strong, the infectious genome would be trapped inside.

    Academic text (2004)
  • And the genetic material is held in a capsule called the capsid that has the form of an icosahedron.

  • Many common colds are caused by rhinoviruses that have a geometric protein structure called a capsid instead of a lipid membrane.

  • When the UCLA team began investigating capsid assembly four years ago, modeling the kinetics of capsid assembly molecule by molecule was intractable.

    Academic text (2004)
  • Turnip yellow mosaic virus, as shown on the left, has a roughly spherical capsid comprising 12 pentameric capsomers and 20 hexameric capsomers.

    Academic text (2004)
  • Researchers are studying the capsid structure to understand how it interacts with host cells.

Surface Forms

capsid singular
capsids plural

Etymology

The word capsid comes from capsule, a word for a small 'box' or 'container', and the ending -id means 'like' or 'related to'. So a capsid is like a tiny 'box' that holds and protects a virus's genetic material.