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Related to Viral capsid: Icosahedral capsid


The protein coat that constitutes the shell of a virus particle.

[From Latin capsa, box.]


(Animals) any heteropterous bug of the family Miridae (formerly Capsidae), most of which feed on plant tissues, causing damage to crops
[C19: from New Latin Capsus (genus)]


(Biochemistry) the outer protein coat of a mature virus
[C20: from French capside, from Latin capsa box]


(ˈkæp sɪd)

the coiled or polyhedral structure, composed of proteins, that encloses the nucleic acid of a virus. Also called protein coat.
[1960–65; < French capside= Latin caps(a) case2 + -ide -id1]
ThesaurusAntonymsRelated WordsSynonymsLegend:
Noun1.capsid - a variety of leaf bugcapsid - a variety of leaf bug    
leaf bug, plant bug - small bright-colored insect that feeds on plant juices
four-lined leaf bug, four-lined plant bug, Poecilocapsus lineatus - yellow or orange leaf bug with four black stripes down the back; widespread in central and eastern North America
lygus bug - vector of viral plant diseases
2.capsid - the outer covering of protein surrounding the nucleic acid of a virus
virion - (virology) a complete viral particle; nucleic acid and capsid (and a lipid envelope in some viruses)
protein - any of a large group of nitrogenous organic compounds that are essential constituents of living cells; consist of polymers of amino acids; essential in the diet of animals for growth and for repair of tissues; can be obtained from meat and eggs and milk and legumes; "a diet high in protein"
References in periodicals archive ?
An accompanying paper in the same issue of Cell shows that a version of Arc found in flies also looks and acts like a viral capsid.
This plasmid, carrying this intended "transgene," would be introduced into a tissue culture "packaging cell line" that has been engineered to also express the required AAV viral capsid proteins and the required "helper virus" genes.
All these strains clustered in the same branch of the phylogenetic tree, with >95% amino acid sequence similarity in the viral capsid protein (online Technical Appendix Figure 2) and, therefore, should be considered 1 genotype species (9).
A heterophile antibody test yielded a positive result the day after admission, and a clinical diagnosis of infectious mononucleosis was confirmed 7 days later with positive Epstein–Barr virus (EBV) serology-positive viral capsid antigen immunoglobulin M, negative viral capsid antigen immunoglobulin G (IgG), and EBV nuclear antigen IgG.
5 - EBV test kasetkowy to detect the p / c IgG against the nuclear antigen (EBNA) and antigen viral capsid (VCA) and to detect the p / c IgM antibodies to the early antigen immediately IEA ZEBRA and antigen viral capsid VCA in serum as a marker of active infection EBV.
For the PCR, specific primers against viral capsid of NV (Richards et al.
Kuypers (2012) describes the human BK virus as having "a non-enveloped icosahedral capsid structure, 40 to 45 nm in diameter, containing a double-stranded DNA genome consisting of approximately 5,300 base pairs that encode six viral proteins: large tumor (LT) antigen, small tumor (st) antigen, three viral capsid proteins (VP1, VP2, VP3), and a nonstructural protein (agnoprotein)" and notes that "viral replication is initiated in the non-coding control region (NCCR) of the viral genome, a region that includes the viral promoters" (p.
The presence of two protein bands can be observed with apparent molecular masses of 96 and 106 kDa, corresponding to the major capsid protein (MCP) and the protein corresponding to the fusion of the MCP with RdRp or with other viral capsid fragments (data not shown) in accord with Poulos et al.
Serological examination revealed that Epstein Barr Virus (EBV) viral capsid antigene IgM, EBV viral capsid antigene IgG and EBV nuclear antigene IgG were negative.
Through the combination of two synthetic peptides representing the immunodominant epitopes of EBNA1 and the viral capsid antigen VCA-p18, only a one-stop ELISA is needed for the specific detection of EBV-reactive IgA antibody in NPC patients.
Many viruses have evolved a self-assembly method which is so successful that the viral capsid can self assemble even when removed from its host cell.
Their topics include producing and purifying viruses for structural studies, the X-ray crystallography of virus capsids, the evolution of viral capsid structures, mechanisms of icosahedral virus assembly, attachment and entry, developing anti-HIV drugs, and viral vectors for gene delivery.