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Bdellomicrovirus
''Bdellomicrovirus'' is a genus of viruses, in the family ''Microviridae'', in the subfamily '' Gokushovirinae''. ''Bdellovibrio ''Bdellovibrio'' is a genus of Gram-negative, obligate aerobic bacteria. One of the more notable characteristics of this genus is that members can prey upon other Gram-negative bacteria and feed on the biopolymers, e.g. proteins and nucleic acid ...'' bacteria serve as natural hosts. There are two species in this genus. Structure Viruses in ''Bdellomicrovirus'' are non-enveloped, with icosahedral and Round geometries, and T=1 symmetry. The diameter is around 30 nm. Genomes are circular, around 4.5kb in length. Life cycle Viral replication is cytoplasmic. Entry into the host cell is achieved by pilus-mediated adsorption into the host cell. Replication follows the ssDNA rolling circle model. DNA templated transcription is the method of transcription. The virus exits the host cell by bacteria lysis. ''Bdellovibrio'' bacteria serve as the natur ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Microviridae
''Microviridae'' is a family of bacteriophages with a single-stranded DNA genome. The name of this family is derived from the ancient Greek word (), meaning "small". This refers to the size of their genomes, which are among the smallest of the DNA viruses. Enterobacteria, intracellular parasitic bacteria, and spiroplasma serve as natural hosts. There are 22 species in this family, divided among seven genera and two subfamilies. Virology The virions are non-enveloped, round with an icosahedral symmetry (T = 1). They have a diameter between 25–27 nanometers and lack tails. Each virion has 60 copies each of the F, G, and J proteins and 12 copies of the H protein. They have 12 pentagonal trumpet-shaped pentamers (~7.1 nm wide × 3.8 nm high), each of which is composed of 5 copies of the G and one of the H protein. Viruses in this family replicate their genomes via a rolling circle mechanism and encode dedicated RCR initiation proteins.Keegstra W, Baas PD, Jansz HS (1979 ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Gokushovirinae
''Gokushovirinae'' is a subfamily of viruses in the family ''Microviridae''. There are 8 species in this subfamily, divided among 4 genera. Species and genera The following species and genera are assigned to the family: * Genus: ''Bdellomicrovirus'' ** '' Bdellovibrio virus MAC1'' ** '' Bdellovibrio virus MH2K'' * Genus: '' Chlamydiamicrovirus'' ** '' Chlamydia virus Chp1'' ** '' Chlamydia virus Chp2'' ** '' Chlamydia virus CPAR39'' ** '' Chlamydia virus CPG1'' * Genus: '' Enterogokushovirus'' ** '' Enterogokushovirus EC6098'' * Genus: ''Spiromicrovirus ''Spiromicrovirus'' is a genus of viruses, in the family ''Microviridae'', in the subfamily ''Gokushovirinae ''Gokushovirinae'' is a subfamily of viruses in the family ''Microviridae ''Microviridae'' is a family of bacteriophages with a ...'' ** '' Spiroplasma virus SpV4'' References External links ICTV {{Taxonbar, from=Q18812371 Microviridae Virus subfamilies ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Bdellovibrio Virus MAC1
''Bdellovibrio'' is a genus of Gram-negative, obligate aerobic bacteria. One of the more notable characteristics of this genus is that members can prey upon other Gram-negative bacteria and feed on the biopolymers, e.g. proteins and nucleic acids, of their hosts. They have two lifestyles: a host-dependent, highly mobile phase, the "attack phase", in which they form "bdelloplasts" in their host bacteria; and a slow-growing, irregularly shaped, host-independent form. Bdellovibrio bacteriovorus The most well studied of these is ''Bdellovibrio bacteriovorus'', which is found almost exclusively in host dependent growth in nature. In this free swimming attack form after searching for prey using its pili, it burrows through the host outer membrane/ peptidoglycan cell wall and enters the periplasmic space. The ''Bdellovibrio'' bacterium then forms a structure called a bdelloplast. This bdelloplast is created as the host cell is modified to become spherical in shape. Inside the bdellopla ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Bdellovibrio Virus MH2K
''Bdellovibrio'' is a genus of Gram-negative, obligate aerobic bacteria. One of the more notable characteristics of this genus is that members can prey upon other Gram-negative bacteria and feed on the biopolymers, e.g. proteins and nucleic acids, of their hosts. They have two lifestyles: a host-dependent, highly mobile phase, the "attack phase", in which they form "bdelloplasts" in their host bacteria; and a slow-growing, irregularly shaped, host-independent form. Bdellovibrio bacteriovorus The most well studied of these is ''Bdellovibrio bacteriovorus'', which is found almost exclusively in host dependent growth in nature. In this free swimming attack form after searching for prey using its pili, it burrows through the host outer membrane/ peptidoglycan cell wall and enters the periplasmic space. The ''Bdellovibrio'' bacterium then forms a structure called a bdelloplast. This bdelloplast is created as the host cell is modified to become spherical in shape. Inside the bdellopla ... [...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] |
Bdellovibrio
''Bdellovibrio'' is a genus of Gram-negative, obligate aerobic bacteria. One of the more notable characteristics of this genus is that members can prey upon other Gram-negative bacteria and feed on the biopolymers, e.g. proteins and nucleic acids, of their hosts. They have two lifestyles: a host-dependent, highly mobile phase, the "attack phase", in which they form "bdelloplasts" in their host bacteria; and a slow-growing, irregularly shaped, host-independent form. Bdellovibrio bacteriovorus The most well studied of these is ''Bdellovibrio bacteriovorus'', which is found almost exclusively in host dependent growth in nature. In this free swimming attack form after searching for prey using its pili, it burrows through the host outer membrane/ peptidoglycan cell wall and enters the periplasmic space. The ''Bdellovibrio'' bacterium then forms a structure called a bdelloplast. This bdelloplast is created as the host cell is modified to become spherical in shape. Inside the bdellopla ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
