virion

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Related to virion: viroid, prion

virion

[vi´re-on]

the complete viral particle, found extracellularly and capable of surviving in crystalline form and infecting a living cell; it comprises the nucleoid (genetic material) and the capsid.

vi·ri·on

(vī'rē-on, vir'ē-on),

The complete virus particle that is structurally intact and infectious.

virion

/vi·ri·on/ (vi´re-on) the complete viral particle, found extracellularly and capable of surviving in crystalline form and infecting a living cell; it comprises the nucleoid (genetic material) and the capsid.

virion

(vī′rē-ŏn′, vîr′ē-)

A complete viral particle, consisting of RNA or DNA surrounded by a protein shell and constituting the infective form of a virus.

virion

[vir′ē·on, vī′rē·on]

Etymology: L, virus, poison

a single virus particle with a central nucleoid surrounded by a protein coat or capsid. The complete nucleocapsid with a nucleic acid core may constitute a complete virus, such as the adenoviruses and the picornaviruses, or it may be surrounded by an envelope, as in the herpesviruses and the myxoviruses. Such an envelope is a membrane that contains lipids, proteins, and carbohydrates and projects spikelike structures from its surface. See also capsid.

vi·ri·on

(vī'rē-on)

The complete virus particle that is structurally intact and infectious.

virion

A complete virus particle, as found outside cells, and consisting of the genetic material and the surrounding capsid.

virion

see VIRUS.

vi·ri·on

(vī'rē-on)

The complete virus particle that is structurally intact and infectious.

virion

a complete virus particle, found extracellularly and capable of surviving in metabolically inert form and able to infect other living cells. Minimally viruses are composed of a core of genetic material which may be either RNA or DNA, single- or double-stranded surrounded by a protein coat (capsid) which together constitute a nucleocapsid. Additionally some viruses have a lipoprotein envelope that surrounds the nucleocapsid.

References in periodicals archive ?

During endocytosis of the virion, acidification of the endosome triggers dissociation of the E protein dimers, exposing a hydrophobic peptide (fusion loop) and rearrangement of the E monomers into trimers.

Zika Virus: The Agent and Its Biology, With Relevance To Pathology

The section of an OB containing virions is displayed by transmission electron microscopy.

Identification and characterization of a new nucleopolyhedrovirus strain of Neodiprion zhejiangensis Zhou & Xiao (hymenoptera: diprionidae)

Virion initiates infection by fusion of the viral envelop with plasma membrane following attachment to the cell surface.

Herpes virus and periodontal disease

A minor structural protein of these viruses is instrumental in guiding the virion on its journey through the insect.

New technologies for studying crops and crop diseases

Herpes simplex virus glycoproteins associated with different morphological entities projecting from the virion envelope.

Activity investigation of pinostrobin towards herpes simplex virus-1 as determined by atomic force microscopy

This protein is a cellular cytidine deaminase that is encapsulated into assembling virions in the absence of vif and is inhibitory during the next round of viral replication.

Downregulation of HIV-1 vif by a hammerhead ribozyme expressed from a retroviral vector

Small-molecule inhibition of HIV-1 replication by specific targeting of the final step of virion maturation.

Maturation inhibitors as new antiretroviral agents

Vif, which stands for virion infectivity factor, seems to play a vital role when HIV infects such cells.

HIV protein counters immune-cell gene. (Disabled Defense)

Because researchers are unsure about how to classify them, various names have been ascribed for them, such as slow virus, virino, viroid, virion and prion, or proteinaceous infectious particle.

Slow viruses

Studies on human primary immune responses to dengue infection have identified critical attachment sites on the virion for neutralizing antibodies (4).

Call to action for dengue vaccine failure

The topics include flavivirus virion structure, structure and function of the flavivirus NS5 protein, host responses during mild and severe dengue, flavivirus antiviral development, and vectors of flaviviruses and strategies for control.