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Epsilonpapillomavirus
''Epsilonpapillomavirus'' is a genus of viruses, in the family ''Papillomaviridae''. Cattle serve as natural hosts and it is one of the bovine papillomaviruses. There are two species in this genus. Diseases associated with this genus include: fibropapillomas and true epithelial papillomas of the skin. Taxonomy The following two species are assigned to the genus: * ''Epsilonpapillomavirus 1'' * ''Epsilonpapillomavirus 2'' Structure Viruses in ''Epsilonpapillomavirus'' are non-enveloped, with icosahedral geometries, and T=7 symmetry. The diameter is around 60 nm. Genomes are circular, around 8kb in length. The genome codes for 6 proteins. Life cycle Viral replication is nuclear. Entry into the host cell is achieved by attachment of the viral proteins to host receptors, which mediates endocytosis. Replication follows the dsDNA bidirectional replication model. Dna templated transcription, with some alternative splicing mechanism is the method of transcription. The virus exit ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Epsilonpapillomavirus 1
''Epsilonpapillomavirus'' is a genus of viruses, in the family ''Papillomaviridae''. Cattle serve as natural hosts and it is one of the bovine papillomavirus Bovine papillomaviruses (BPV) are a paraphyletic group of DNA viruses of the subfamily ''Firstpapillomavirinae'' of ''Papillomaviridae'' that are common in cattle. All BPVs have a circular genome, circular double-stranded DNA genome. Infection c ...es. There are two species in this genus. Diseases associated with this genus include: fibropapillomas and true epithelial papillomas of the skin. Taxonomy The following two species are assigned to the genus: * '' Epsilonpapillomavirus 1'' * '' Epsilonpapillomavirus 2'' Structure Viruses in ''Epsilonpapillomavirus'' are non-enveloped, with icosahedral geometries, and T=7 symmetry. The diameter is around 60 nm. Genomes are circular, around 8kb in length. The genome codes for 6 proteins. Life cycle Viral replication is nuclear. Entry into the host cell is achieved by att ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Epsilonpapillomavirus 2
''Epsilonpapillomavirus'' is a genus of viruses, in the family ''Papillomaviridae''. Cattle serve as natural hosts and it is one of the bovine papillomaviruses. There are two species in this genus. Diseases associated with this genus include: fibropapillomas and true epithelial papillomas of the skin. Taxonomy The following two species are assigned to the genus: * ''Epsilonpapillomavirus 1 ''Epsilonpapillomavirus'' is a genus of viruses, in the family ''Papillomaviridae''. Cattle serve as natural hosts and it is one of the bovine papillomavirus Bovine papillomaviruses (BPV) are a paraphyletic group of DNA viruses of the subfam ...'' * '' Epsilonpapillomavirus 2'' Structure Viruses in ''Epsilonpapillomavirus'' are non-enveloped, with icosahedral geometries, and T=7 symmetry. The diameter is around 60 nm. Genomes are circular, around 8kb in length. The genome codes for 6 proteins. Life cycle Viral replication is nuclear. Entry into the host cell is achieved by atta ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Bovine Papillomavirus
Bovine papillomaviruses (BPV) are a paraphyletic group of DNA viruses of the subfamily ''Firstpapillomavirinae'' of ''Papillomaviridae'' that are common in cattle. All BPVs have a circular genome, circular double-stranded DNA genome. Infection causes warts (papillomas and fibropapillomas) of the skin and alimentary tract, and more rarely cancers of the alimentary tract and urinary bladder. They are also thought to cause the skin tumour equine sarcoid in horses and donkeys. BPVs have been used as a model for studying papillomavirus molecular biology and for dissecting the mechanisms by which this group of viruses cause cancer. Structure and genetic organisation Like other papillomaviruses, BPVs are small non-enveloped viruses with an icosahedral capsid around 50–60 nm in diameter. The capsid is formed of the L1 and L2 structural proteins, with the L1 C-terminus exposed. All BPVs have a circular genome, circular double-stranded DNA genome of 7.3–8.0 kb. The genetic organ ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Papillomaviridae
''Papillomaviridae'' is a family of non- enveloped DNA viruses whose members are known as papillomaviruses. Several hundred species of papillomaviruses, traditionally referred to as "types", have been identified infecting all carefully inspected mammals, but also other vertebrates such as birds, snakes, turtles and fish. Infection by most papillomavirus types, depending on the type, is either asymptomatic (e.g. most Beta-PVs) or causes small benign tumors, known as papillomas or warts (e.g. human papillomavirus 1, HPV6 or HPV11). Papillomas caused by some types, however, such as human papillomaviruses 16 and 18, carry a risk of becoming cancerous. Papillomaviruses are usually considered as highly host- and tissue-tropic, and are thought to rarely be transmitted between species. Papillomaviruses replicate exclusively in the basal layer of the body surface tissues. All known papillomavirus types infect a particular body surface, typically the skin or mucosal epithelium of the gen ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Papillomavirus
''Papillomaviridae'' is a family of non- enveloped DNA viruses whose members are known as papillomaviruses. Several hundred species of papillomaviruses, traditionally referred to as "types", have been identified infecting all carefully inspected mammals, but also other vertebrates such as birds, snakes, turtles and fish. Infection by most papillomavirus types, depending on the type, is either asymptomatic (e.g. most Beta-PVs) or causes small benign tumors, known as papillomas or warts (e.g. human papillomavirus 1, HPV6 or HPV11). Papillomas caused by some types, however, such as human papillomaviruses 16 and 18, carry a risk of becoming cancerous. Papillomaviruses are usually considered as highly host- and tissue-tropic, and are thought to rarely be transmitted between species. Papillomaviruses replicate exclusively in the basal layer of the body surface tissues. All known papillomavirus types infect a particular body surface, typically the skin or mucosal epithelium of the gen ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Viruses
A virus is a submicroscopic infectious agent that replicates only inside the living cells of an organism. Viruses infect all life forms, from animals and plants to microorganisms, including bacteria and archaea. Since Dmitri Ivanovsky's 1892 article describing a non-bacterial pathogen infecting tobacco plants and the discovery of the tobacco mosaic virus by Martinus Beijerinck in 1898,Dimmock p. 4 more than 9,000 virus species have been described in detail of the millions of types of viruses in the environment. Viruses are found in almost every ecosystem on Earth and are the most numerous type of biological entity. The study of viruses is known as virology, a subspeciality of microbiology. When infected, a host cell is often forced to rapidly produce thousands of copies of the original virus. When not inside an infected cell or in the process of infecting a cell, viruses exist in the form of independent particles, or ''virions'', consisting of (i) the genetic material, i.e ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
