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Asfarviridae Virion
''Asfarviridae'' is a family of viruses, the best-studied of which is African swine fever virus, which are double-stranded DNA viruses. Taxonomy There is only one species under Asfarviridae in ICTV 2022: * Genus Asfivirus ** Species African swine fever virus But, there may be more viruses: * Abalone asfarvirus * Dinodnavirus (Heterocapsa circularisquama DNA virus or hcDNAV) * Faustovirus ''Faustovirus'' is a genus of giant virus which infects amoebae associated with humans. The virus was first isolated in 2015 and shown to be around 0.2 micrometers in diameter with a double stranded DNA genome of 466 kilobases predicted to enco ... * Kaumoebavirus * Pacmanvirus * Additional genomes known from environmental sampling of diverse marine, freshwater, and terrestrial habitats References {{Taxonbar, from=Q250204 Nucleocytoplasmic large DNA viruses Virus families ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Taxonomy
image:Hierarchical clustering diagram.png, 280px, Generalized scheme of taxonomy Taxonomy is a practice and science concerned with classification or categorization. Typically, there are two parts to it: the development of an underlying scheme of classes (a taxonomy) and the allocation of things to the classes (classification). Originally, taxonomy referred only to the Taxonomy (biology), classification of organisms on the basis of shared characteristics. Today it also has a more general sense. It may refer to the classification of things or concepts, as well as to the principles underlying such work. Thus a taxonomy can be used to organize species, documents, videos or anything else. A taxonomy organizes taxonomic units known as "taxa" (singular "taxon"). Many are hierarchy, hierarchies. One function of a taxonomy is to help users more easily find what they are searching for. This may be effected in ways that include a library classification system and a Taxonomy for search e ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
African Swine Fever Virus
African swine fever virus (ASFV) is a large, double-stranded DNA virus in the ''Asfarviridae'' family. It is the causative agent of African swine fever (ASF). The virus causes a haemorrhagic fever, hemorrhagic fever with high mortality rates in domestic pigs; some isolates can cause death of animals as quickly as a week after infection. It persistently infects its natural hosts, warthogs, bushpigs, and soft ticks of the genus ''Ornithodoros'', which likely act as a vector (epidemiology), vector, with no disease signs. It does not cause disease in humans. ASFV is endemic to sub-Saharan Africa and exists in the wild through a cycle of infection between ticks and wild pigs, bushpigs, and warthogs. The disease was first described after European settlers brought pigs into areas endemic with ASFV, and as such, is an example of an emerging infectious disease. ASFV replicates in the cytoplasm of infected cells. It is the only virus with a double-stranded DNA genome known to be transmi ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Double-stranded DNA Virus
A DNA virus is a virus that has a genome made of deoxyribonucleic acid (DNA) that is replicated by a DNA polymerase. They can be divided between those that have two strands of DNA in their genome, called double-stranded DNA (dsDNA) viruses, and those that have one strand of DNA in their genome, called single-stranded DNA (ssDNA) viruses. dsDNA viruses primarily belong to two realms: ''Duplodnaviria'' and ''Varidnaviria'', and ssDNA viruses are almost exclusively assigned to the realm ''Monodnaviria'', which also includes some dsDNA viruses. Additionally, many DNA viruses are unassigned to higher taxa. Reverse transcribing viruses, which have a DNA genome that is replicated through an RNA intermediate by a reverse transcriptase, are classified into the kingdom '' Pararnavirae'' in the realm ''Riboviria''. DNA viruses are ubiquitous worldwide, especially in marine environments where they form an important part of marine ecosystems, and infect both prokaryotes and eukaryotes. They a ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Abalone Asfarvirus
Abalone ( or ; via Spanish , from Rumsen ''aulón'') is a common name for any small to very large marine gastropod mollusc in the family Haliotidae, which once contained six genera but now contains only one genus, ''Haliotis''. Other common names are ear shells, sea ears, and, now rarely, muttonfish or muttonshells in parts of Australia, ormer in the United Kingdom, perlemoen in South Africa, and pāua in New Zealand. The number of abalone species recognized worldwide ranges between 30 and 130 with over 230 species-level taxa described. The most comprehensive treatment of the family considers 56 species valid, with 18 additional subspecies. The shells of abalone have a low, open spiral structure, and are characterized by several open respiratory pores in a row near the shell's outer edge. The thick inner layer of the shell is composed of nacre, which in many species is highly iridescent, giving rise to a range of strong, changeable colors which make the shells attractive to ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Dinodnavirus
''Dinodnavirus'' is a genus of viruses that infect dinoflagellates.Tarutani K, Nagasaki K, Itakura S, Yamaguchi M (2001) Isolation of a virus infecting the novel shellfish-killing dinoflagellate ''Heterocapsa circularisquama''. Aquat Microb Ecol 23:103–111 This genus belongs to the clade of nucleocytoplasmic large DNA viruses. The only species in the genus is ''Heterocapsa circularisquama DNA virus 01''. Name The order name, ''Dinodnavirales,'' is a combination of ''Dino'', from host ''dinoflagellate'' and ''dna'', from its DNA genome. Virology The virus has an icosahedral capsid 180–210 nanometers in diameter. The genome is a single molecule of double stranded DNA of about 356-kilobases. It infects the dinoflagellate '' Heterocapsa circularisquama''. During replication virions emerge from a specific cytoplasm compartment – the 'viroplasm' – which is created by the virus.Nagasaki K, Tomaru Y, Tarutani K, Katanozaka N, Yamanaka S, Tanabe H, Yamaguchi M (2003) Grow ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Faustovirus
''Faustovirus'' is a genus of giant virus which infects amoebae associated with humans. The virus was first isolated in 2015 and shown to be around 0.2 micrometers in diameter with a double stranded DNA genome of 466 kilobases predicted to encode 451 proteins. Although classified as a nucleocytoplasmic large DNA virus (NCLDV), faustoviruses share less than a quarter of their genes with other NCLDVs; however, ~46% are homologous to bacterial genes and the remainder are orphan genes (ORFans). Specifically, the gene encoding the major capsid protein (MCP) of faustovirus is different than that of its most closely related giant virus, asfivirus, as well as other NCLDVs. In asfivirus, the gene encoding MCP is a single genomic fragment of ~2000 base pairs (bp), however, in faustovirus the MCP is encoded by 13 exons separated by 12 large introns. The exons have a mean length of 149 bp and the introns have a mean length of 1,273 bp. The presence of introns in faustovirus genes is highly u ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Asfarviridae
''Asfarviridae'' is a family of viruses, the best-studied of which is African swine fever virus, which are double-stranded DNA viruses. Taxonomy There is only one species under Asfarviridae in ICTV 2022: * Genus Asfivirus ** Species African swine fever virus African swine fever virus (ASFV) is a large, double-stranded DNA virus in the ''Asfarviridae'' family. It is the causative agent of African swine fever (ASF). The virus causes a haemorrhagic fever, hemorrhagic fever with high mortality rates i ... But, there may be more viruses: * Abalone asfarvirus * Dinodnavirus (Heterocapsa circularisquama DNA virus or hcDNAV) * Faustovirus * Kaumoebavirus * Pacmanvirus * Additional genomes known from environmental sampling of diverse marine, freshwater, and terrestrial habitats References {{Taxonbar, from=Q250204 Nucleocytoplasmic large DNA viruses Virus families ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Nucleocytoplasmic Large DNA Viruses
''Nucleocytoviricota'' is a phylum of viruses. Members of the phylum are also known as the nucleocytoplasmic large DNA viruses (NCLDV), which serves as the basis of the name of the phylum with the suffix - for virus phylum. These viruses are referred to as nucleocytoplasmic because they are often able to replicate in both the host's cell nucleus and cytoplasm. The phylum is notable for containing the giant viruses. There are nine families of NCLDVs that all share certain genomic and structural characteristics; however, it is uncertain whether the similarities of the different families of this group have a common viral ancestor. One feature of this group is a large genome and the presence of many genes involved in DNA repair, DNA replication, transcription, and translation. Typically, viruses with smaller genomes do not contain genes for these processes. Most of the viruses in this family also replicate in both the host's nucleus and cytoplasm, thus the name nucleocytoplasmic. T ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
