Definition of Capsid

1. Noun. A variety of leaf bug.




2. Noun. The outer covering of protein surrounding the nucleic acid of a virus.
Group relationships: Virion
Generic synonyms: Protein

Definition of Capsid

1. Noun. The outer protein shell of a virus. ¹

¹ Source: wiktionary.com

Definition of Capsid

1. the outer shell of a virus particle [n -S] : CAPSIDAL [adj]

Medical Definition of Capsid

1. A protein coat that covers the nucleoprotein core or nucleic acid of a virion. Commonly shows icosahedral symmetry and may itself be enclosed in an envelope (as in the Togaviridae). The capsid is built up of subunits (some integer multiple of 60, the number required to give strict icosahedral symmetry) that self assemble in a pattern typical of a particular virus. The subunits are often packed, in smaller capsids, into 5 or 6 membered rings (pentamers or hexamers) that constitute the morphological unit (capsomere). The packing of subunits is not perfectly symmetrical in most cases and some units may have strained interactions and are said to have quasi equivalence of bonding to adjacent units. This entry appears with permission from the Dictionary of Cell and Molecular Biology (11 Mar 2008)

Capsid Pictures

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Lexicographical Neighbors of Capsid

capsaicins
capsanthin
capsanthin-capsorubin synthase
capscrew
capscrews
capsful
capsheaf
capsicin
capsicine
capsicins
capsicol
capsicum
capsicum pepper plant
capsicum spray
capsicums
capsid (current term)
capsidal
capsids
capsizable
capsizal
capsizals
capsize
capsized
capsizer
capsizers
capsizes
capsizing
capsizings
capslock
capslocks

Literary usage of Capsid

Below you will find example usage of this term as found in modern and/or classical literature:

1. Manual of Microbiologic Monitoring of Laboratory Animals edited by Kim Waggie (1994)
"These particles have a smooth outer rim, formed by the outer capsid, and short spokes, formed by the inner capsid. Single-shelled particles are ..."

2. Agricultural Biotechnology: Novel Products and New Partnerships by Jane B. Segelken (1998)
"When the gene encoding the single capsid protein of Norwalk virus was expressed in insect cells, virus- like particles (VLPs) could be isolated. ..."

3. Gene Expression in Field Crops: Bibliography January 1991-November 1992 edited by Janet Saunders, Robert D. Warmbrodt (1995)
"A1J6 A temporal study of the expression of the capsid, cytoplasmic inclusion and nuclear inclusion proteins of tobacco etch potyvirus in infected plants. ..."

4. The Ottawa Naturalist by Ottawa Field-Naturalists' Club (1891)
"capsid/E sp. Aug. 18th, Kettle Island. Also new to Mr. Van Duzee. capsid/E sp. Aug. 18th and 25th, Kettle Island; common. A pretty species with red ..."

5. Viral Resistance in Plants/Viral Coat Proteins: Bibliography-January 91-July 96 by Raymond Dobert (1996)
"448.3-Ar23 Cloning and nucleotide sequence of the capsid protein and the nuclear ... Furthermore, there are two AUG codons in frame in front of the capsid ..."

6. Pathogens of Soybean Seeds: Bibliographyby Andrew Kalinski by Andrew Kalinski (1999)
"We find that despite the absence of particles by electron microscopy, that we can purify large amounts of an apparent virion with a capsid protein of ..."

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