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Plasmaviridae
''Plasmaviridae'' is a family of bacteria-infecting viruses. '' Acholeplasma'' species serve as natural hosts. There is one genus in the family, ''Plasmavirus'', which contains one species: ''Acholeplasma virus L2''. All viruses known in this family have been isolated from species in the class Mollicutes. This family is poorly studied and little is known about the diversity and biology of these viruses. Taxonomy The family has one genus, ''Plasmavirus'', which has one recognized member: ''Acholeplasma virus L2''. There are five tentative members of ''Plasmavirus'': * '' Mycoplasmatales virus-laidlawii 1'' (L1) * '' Mycoplasmatales virus-laidlawii 2'' (L2) * '' Mycoplasmatales virus-laidlawii 3'' (L3) * '' Mycoplasmatales virus-laidlawii 51'' (L51) * '' Mycoplasmatales virus-laidlawii O1'' (O1) Genome The genome is condensed, nonsegmented and consists of a single molecule of circular, supercoiled double-stranded DNA, 12 kilobase pairs in length. The genome has a rather high G ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Plasmaviridae
''Plasmaviridae'' is a family of bacteria-infecting viruses. '' Acholeplasma'' species serve as natural hosts. There is one genus in the family, ''Plasmavirus'', which contains one species: ''Acholeplasma virus L2''. All viruses known in this family have been isolated from species in the class Mollicutes. This family is poorly studied and little is known about the diversity and biology of these viruses. Taxonomy The family has one genus, ''Plasmavirus'', which has one recognized member: ''Acholeplasma virus L2''. There are five tentative members of ''Plasmavirus'': * '' Mycoplasmatales virus-laidlawii 1'' (L1) * '' Mycoplasmatales virus-laidlawii 2'' (L2) * '' Mycoplasmatales virus-laidlawii 3'' (L3) * '' Mycoplasmatales virus-laidlawii 51'' (L51) * '' Mycoplasmatales virus-laidlawii O1'' (O1) Genome The genome is condensed, nonsegmented and consists of a single molecule of circular, supercoiled double-stranded DNA, 12 kilobase pairs in length. The genome has a rather high G ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Bacteriophages
A bacteriophage (), also known informally as a ''phage'' (), is a duplodnaviria virus that infects and replicates within bacteria and archaea. The term was derived from "bacteria" and the Greek φαγεῖν ('), meaning "to devour". Bacteriophages are composed of proteins that encapsulate a DNA or RNA genome, and may have structures that are either simple or elaborate. Their genomes may encode as few as four genes (e.g. MS2) and as many as hundreds of genes. Phages replicate within the bacterium following the injection of their genome into its cytoplasm. Bacteriophages are among the most common and diverse entities in the biosphere. Bacteriophages are ubiquitous viruses, found wherever bacteria exist. It is estimated there are more than 1031 bacteriophages on the planet, more than every other organism on Earth, including bacteria, combined. Viruses are the most abundant biological entity in the water column of the world's oceans, and the second largest component of biomass ... [...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] |
Acholeplasma
''Acholeplasma'' are wall-less bacteria in the Mollicutes class. They include saprotrophic or pathogenic species. There are 15 recognised species. The G+C content is low, ranging from 26 - 36% ( mol%). The genomes of ''Acholeplasma'' species range in size from 1.5 to 1.65 Mbp. Cholesterol is not required for growth. The species are found on animals, and some plants and insects. The optimum growth temperature is 30 to 37 degrees Celsius. ''Acholeplasma laidlawii'' is a common contaminant of cell culture media products, and has also been used in extensive studies of lipid polymorphism because this organism alters its ratio of MGlcDG (monoglucosyl diacylglycerol) to DGlcDG (diglucosyl diacylglycerol) in response to growth conditions. Phylogeny See also * List of bacteria genera * List of bacterial orders This article lists the orders of the Bacteria. The currently accepted taxonomy is based on the List of Prokaryotic names with Standing in Nomenclature (LPSN) and National Center ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Mollicutes
Mollicutes is a class of bacteria distinguished by the absence of a cell wall. The word "Mollicutes" is derived from the Latin ''mollis'' (meaning "soft" or "pliable"), and ''cutis'' (meaning "skin"). Individuals are very small, typically only 0.2–0.3 μm (200-300 nm) in size and have a very small genome size. They vary in form, although most have sterols that make the cell membrane somewhat more rigid. Many are able to move about through gliding, but members of the genus ''Spiroplasma'' are helical and move by twisting. The best-known genus in the Mollicutes is ''Mycoplasma''. Colonies show the typical "fried-egg" appearance. Mollicutes are parasites of various animals and plants, living on or in the host's cells. Many cause diseases in humans, attaching to cells in the respiratory or urogenital tracts, particularly species of ''Mycoplasma'' and ''Ureaplasma''. Phytoplasma and ''Spiroplasma'' are plant pathogens associated with insect vectors. Whereas formerly the trivial n ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Mycoplasmatales Virus-laidlawii 1
Mycoplasmataceae is a family of bacteria in the order Mycoplasmatales. This family consists of the genera ''Mycoplasma'' and ''Ureaplasma''. In 1967, the order Mycoplasmatales was incorporated into the class Mollicutes. Many species are sexually transmitted and cause pelvic inflammatory disease. Taxonomy ''Mycoplasma'' ''Mycoplasma ''refers to a genus of bacteria that lack a cell wall and possess a three-layered cellular membrane. They can be parasitic or saprotrophic. Several species are sexually transmitted and pathogenic in humans. Others are found on cats, dogs, and barnyard fowl. ''Ureaplasma'' ''Ureaplasma'' is the second of two genera of bacteria belonging to the family Mycoplasmataceae. As the name implies, ureaplasma is urease positive. This genera is distinct from other genera in Mollicutes in that it hydrolyses urea for generation of ATP. ''Ureaplasma'' ''spp.'' as human pathogens Both ''Ureaplasma urealyticum'' and '' Ureaplasma parvum'' have been identified as ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Mycoplasmatales Virus-laidlawii 2
Mycoplasmataceae is a family of bacteria in the order Mycoplasmatales. This family consists of the genera ''Mycoplasma'' and ''Ureaplasma''. In 1967, the order Mycoplasmatales was incorporated into the class Mollicutes. Many species are sexually transmitted and cause pelvic inflammatory disease. Taxonomy ''Mycoplasma'' ''Mycoplasma ''refers to a genus of bacteria that lack a cell wall and possess a three-layered cellular membrane. They can be parasitic or saprotrophic. Several species are sexually transmitted and pathogenic in humans. Others are found on cats, dogs, and barnyard fowl. ''Ureaplasma'' ''Ureaplasma'' is the second of two genera of bacteria belonging to the family Mycoplasmataceae. As the name implies, ureaplasma is urease positive. This genera is distinct from other genera in Mollicutes in that it hydrolyses urea for generation of ATP. ''Ureaplasma'' ''spp.'' as human pathogens Both ''Ureaplasma urealyticum'' and '' Ureaplasma parvum'' have been identified as ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Mycoplasmatales Virus-laidlawii 3
Mycoplasmataceae is a family of bacteria in the order Mycoplasmatales. This family consists of the genera ''Mycoplasma'' and ''Ureaplasma''. In 1967, the order Mycoplasmatales was incorporated into the class Mollicutes. Many species are sexually transmitted and cause pelvic inflammatory disease. Taxonomy ''Mycoplasma'' ''Mycoplasma ''refers to a genus of bacteria that lack a cell wall and possess a three-layered cellular membrane. They can be parasitic or saprotrophic. Several species are sexually transmitted and pathogenic in humans. Others are found on cats, dogs, and barnyard fowl. ''Ureaplasma'' ''Ureaplasma'' is the second of two genera of bacteria belonging to the family Mycoplasmataceae. As the name implies, ureaplasma is urease positive. This genera is distinct from other genera in Mollicutes in that it hydrolyses urea for generation of ATP. ''Ureaplasma'' ''spp.'' as human pathogens Both ''Ureaplasma urealyticum'' and '' Ureaplasma parvum'' have been identified as ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Mycoplasmatales Virus-laidlawii 51
Mycoplasmataceae is a family of bacteria in the order Mycoplasmatales. This family consists of the genera ''Mycoplasma'' and ''Ureaplasma''. In 1967, the order Mycoplasmatales was incorporated into the class Mollicutes. Many species are sexually transmitted and cause pelvic inflammatory disease. Taxonomy ''Mycoplasma'' ''Mycoplasma ''refers to a genus of bacteria that lack a cell wall and possess a three-layered cellular membrane. They can be parasitic or saprotrophic. Several species are sexually transmitted and pathogenic in humans. Others are found on cats, dogs, and barnyard fowl. ''Ureaplasma'' ''Ureaplasma'' is the second of two genera of bacteria belonging to the family Mycoplasmataceae. As the name implies, ureaplasma is urease positive. This genera is distinct from other genera in Mollicutes in that it hydrolyses urea for generation of ATP. ''Ureaplasma'' ''spp.'' as human pathogens Both ''Ureaplasma urealyticum'' and '' Ureaplasma parvum'' have been identified as ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Mycoplasmatales Virus-laidlawii O1
Mycoplasmataceae is a family of bacteria in the order Mycoplasmatales. This family consists of the genera ''Mycoplasma'' and ''Ureaplasma''. In 1967, the order Mycoplasmatales was incorporated into the class Mollicutes. Many species are sexually transmitted and cause pelvic inflammatory disease. Taxonomy ''Mycoplasma'' ''Mycoplasma ''refers to a genus of bacteria that lack a cell wall and possess a three-layered cellular membrane. They can be parasitic or saprotrophic. Several species are sexually transmitted and pathogenic in humans. Others are found on cats, dogs, and barnyard fowl. ''Ureaplasma'' ''Ureaplasma'' is the second of two genera of bacteria belonging to the family Mycoplasmataceae. As the name implies, ureaplasma is urease positive. This genera is distinct from other genera in Mollicutes in that it hydrolyses urea for generation of ATP. ''Ureaplasma'' ''spp.'' as human pathogens Both ''Ureaplasma urealyticum'' and ''Ureaplasma parvum'' have been identified as ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
