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Pandoravirus
''Pandoravirus'' is a proposed genus of giant virus, first discovered in 2013. It is the third largest in physical size of any known viral genus, behind Pithovirus and Megaklothovirus. Pandoraviruses have double stranded DNA genomes, with the largest genome size (2.5 million base pairs) of any known viral genus. Discovery The discovery of Pandoraviruses by a team of French scientists, led by husband and wife Jean-Michel Claverie and Chantal Abergel, was announced in a report in the journal ''Science'' in July 2013. Other scientists had previously observed the pandoravirus particles, but owing to their enormous size they were not expected to be viruses. Patrick Scheid, a parasitologist from the Central Institute of the Bundeswehr Medical Service in Koblenz, Germany, found one in 2008, in an amoeba living in the contact lens of a woman with keratitis. Its development within the amoebal host was documented extensively. Unlike in other cases with such giant viruses, the l ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Pandoravirus Braziliensis
''Pandoravirus'' is a proposed genus of Nucleocytoplasmic large DNA viruses, giant virus, first discovered in 2013. It is the third largest in physical size of any known viral genus, behind Pithovirus and wikispecies:Megaklothovirus, Megaklothovirus. Pandoraviruses have double stranded DNA genomes, with the largest genome size (2.5 million base pairs) of any known viral genus. Discovery The discovery of Pandoraviruses by a team of French scientists, led by husband and wife Jean-Michel Claverie and Chantal Abergel, was announced in a report in the journal ''Science (journal), Science'' in July 2013. Other scientists had previously observed the pandoravirus particles, but owing to their enormous size they were not expected to be viruses. Patrick Scheid, a parasitologist from the Joint Medical Service (Germany), Central Institute of the Bundeswehr Medical Service in Koblenz, Germany, found one in 2008, in an amoeba living in the contact lens of a woman with keratitis. Its develo ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Pandoravirus Hades
''Pandoravirus'' is a proposed genus of giant virus, first discovered in 2013. It is the third largest in physical size of any known viral genus, behind Pithovirus and Megaklothovirus. Pandoraviruses have double stranded DNA genomes, with the largest genome size (2.5 million base pairs) of any known viral genus. Discovery The discovery of Pandoraviruses by a team of French scientists, led by husband and wife Jean-Michel Claverie and Chantal Abergel, was announced in a report in the journal ''Science'' in July 2013. Other scientists had previously observed the pandoravirus particles, but owing to their enormous size they were not expected to be viruses. Patrick Scheid, a parasitologist from the Central Institute of the Bundeswehr Medical Service in Koblenz, Germany, found one in 2008, in an amoeba living in the contact lens of a woman with keratitis. Its development within the amoebal host was documented extensively. Unlike in other cases with such giant viruses, the large p ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Pithovirus
''Alphapithovirus'', is a genus of giant virus known from two species, '' Alphapithovirus sibericum'', which infects amoebas, and '' Alphapithovirus massiliense''. It is DNA-based and is a member of the nucleocytoplasmic large DNA viruses clade. It was discovered in 2014, when a viable specimen was found in a 30,000-year-old ice core harvested from permafrost in Siberia, Russia. Description The genus name ''Alphapithovirus'', a reference to large storage containers of ancient Greece known as pithoi, was chosen to describe the new species. A specimen of ''Alphapithovirus'' measures approximately 1.5 μm (1500 nm) in length and 0.5 μm (500 nm) in diameter, making it one of the largest viruses yet found, second to Megaklothovirus. It is 50% larger in size than the '' Pandoraviridae'', the previous largest-known viruses, and is larger than '' Ostreococcus'', the smallest eukaryotic cell, although ''Pandoravirus'' has the largest viral genome, containing 1.9 to ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Pandoravirus Dulcis
''Pandoravirus dulcis'' is an egg-shaped virus of genus ''Pandoravirus'', that was discovered in a shallow lake at La Trobe University, Melbourne, Australia Australia, officially the Commonwealth of Australia, is a country comprising mainland Australia, the mainland of the Australia (continent), Australian continent, the island of Tasmania and list of islands of Australia, numerous smaller isl ... in 2013. The virus contains around 1.9 million DNA bases and about 1500 genes. It infects amoeba living in pond water. Along with '' Pandoravirus salinus'', and around one micrometre in size, it is one of the largest viruses ever identified. References 2013 in science Nucleocytoplasmic large DNA viruses Unaccepted virus taxa {{Virus-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Pandoraviridae
''Pandoraviridae'' is a proposed family of double-stranded DNA viruses that infect amoebae. There is only one genus in this family: ''Pandoravirus''. Several species in this genus have been described, including '' Pandoravirus dulcis'', '' Pandoravirus salinus'' and '' Pandoravirus yedoma''. History The viruses were discovered in 2013. Description The viruses in this family are the second largest known virus (~1 micrometer) in capsid length, after ''Pithovirus'' (1.5 micrometer). ''Pandoravirus'' has the largest viral genome known, containing double-stranded DNA Deoxyribonucleic acid (; DNA) is a polymer composed of two polynucleotide chains that coil around each other to form a double helix. The polymer carries genetic instructions for the development, functioning, growth and reproduction of al ... of 1.9 to 2.5 megabase pairs. Evolution These viruses appear to be related to the phycodnaviruses. References {{Taxonbar, from=Q16987267 Nucleocytoplasmic larg ... [...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] |
Megavirus
''Megavirus'' is a viral genus, phylogenetically related to '' Acanthamoeba polyphaga mimivirus'' (APMV). In colloquial speech, ''Megavirus chilense'' is more commonly referred to as just "Megavirus". Until the discovery of pandoraviruses in 2013, it had the largest capsid diameter of all known viruses, as well as the largest and most complex genome among all known viruses. Discovery ''Megavirus'' was isolated from a water sample collected in April 2010 off the coast of Chile, near the marine station in Las Cruces, by Jean-Michel Claverie and Chantal Abergel from the Structural & Genomic Information laboratory (IGS, CNRS and Aix-Marseille University). Megavirus was isolated by co-cultivation with a variety of ''Acanthamoeba'' laboratory strains ('' Acanthamoeba polyphaga'', '' Acanthamoeba castellanii'', '' Acanthamoeba griffini'') following a protocol pioneered by Timothy Rowbotham for isolating intracellular parasitic bacteria. Megavirus infects amoebas. Structure The Me ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
