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Melainabacteria
Melainabacteria is a phylum related to Cyanobacteria. Organisms belonging to this phylum have been found in the human gut and various aquatic habitats such as groundwater. By analyzing genomes of Melainabacteria, predictions are possible about the cell structure and metabolic abilities. The bacterial cell is similar to cyanobacteria in being surrounded by two membranes. It differs from cyanobacteria in its ability to move by flagella (like gram-negative flagella), though some members (e.g. Gastranaerophilales) lack flagella. Melainabacteria are not able to perform photosynthesis, but obtain energy by fermentation. Phylogeny Classification * Class "Melainabacteria" Soo et al. 2014 Vampirovibrionia"(ACD20) ** Order " Caenarcanales" corrig. Soo et al. 2014 Caenarcaniphilales" Soo et al. 2014">Caenarcaniphilales.html" ;"title="Caenarcaniphilales">Caenarcaniphilales" Soo et al. 2014*** Family "Caenarcanaceae" **** Genus "''Ca.'' Caenarcanum" Soo et al. 2014 ***** "''Ca.'' Caenarca ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Terrabacteria
Terrabacteria is a taxon containing approximately two-thirds of prokaryote species, including those in the gram positive phyla (Actinomycetota and Bacillota) as well as the phyla "Cyanobacteria", Chloroflexota, and Deinococcota. It derives its name (''terra'' = "land") from the evolutionary pressures of life on land. Terrabacteria possess important adaptations such as resistance to environmental hazards (e.g., desiccation, ultraviolet radiation, and high salinity) and oxygenic photosynthesis. Also, the unique properties of the cell wall in gram-positive taxa, which likely evolved in response to terrestrial conditions, have contributed toward pathogenicity in many species. These results now leave open the possibility that terrestrial adaptations may have played a larger role in prokaryote evolution than currently understood. Terrabacteria was proposed in 2004 for Actinomycetota, "Cyanobacteria", and Deinococcota and was expanded later to include Bacillota and Chloroflexota. Othe ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Vampirovibrio Chlorellavorus
''Vampirovibrio chlorellavorus'' is a 0.6 µm pleomorphic cocci with a gram negative cell wall,I. Esteve, R. Guerrero, E. Montesinos, and C. Abellà. "Electron Microscope Study of the Interaction of Epibiontic Bacteria with Chromatium minus in Natural Habitats." Microbial Ecology 9 (Apr 1983): 57-64. doi:10.1007/BF02011580 and is one of the few known predatory bacteria.Ricardo Guerrero, Lynn Margulis, ''et al''. "Predatory Prokaryotes: Predation and Primary Consumption Evolved in Bacteria." Evolution and Microbiology 83 (1986): 2138-142. Proceedings of the National Academy of Sciences of the United States of America. U.S. National Library of Medicine. doi:10.1073/pnas.83.7.2138 Unlike many bacteria, ''Vampirovibrio chlorellavorus'' is an obligate parasite, attaching to the cell wall of green algae of the genus ''Chlorella''. ''Vampirovibrio'' originates from the Serbian ( Cyrillic: ). meaning vampire (due to the nature of sucking out cellular contents of its prey) ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Cyanobacteria
Cyanobacteria (), also known as Cyanophyta, are a phylum of gram-negative bacteria that obtain energy via photosynthesis. The name ''cyanobacteria'' refers to their color (), which similarly forms the basis of cyanobacteria's common name, blue-green algae, although they are not usually scientifically classified as algae. They appear to have originated in a freshwater or terrestrial environment. Sericytochromatia, the proposed name of the paraphyletic and most basal group, is the ancestor of both the non-photosynthetic group Melainabacteria and the photosynthetic cyanobacteria, also called Oxyphotobacteria. Cyanobacteria use photosynthetic pigments, such as carotenoids, phycobilins, and various forms of chlorophyll, which absorb energy from light. Unlike heterotrophic prokaryotes, cyanobacteria have internal membranes. These are flattened sacs called thylakoids where photosynthesis is performed. Phototrophic eukaryotes such as green plants perform photosynthesis in plast ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Sericytochromatia
Cyanobacteria (), also known as Cyanophyta, are a phylum of gram-negative bacteria that obtain energy via photosynthesis. The name ''cyanobacteria'' refers to their color (), which similarly forms the basis of cyanobacteria's common name, blue-green algae, although they are not usually scientifically classified as algae. They appear to have originated in a freshwater or terrestrial environment. Sericytochromatia, the proposed name of the paraphyletic and most basal group, is the ancestor of both the non-photosynthetic group Melainabacteria and the photosynthetic cyanobacteria, also called Oxyphotobacteria. Cyanobacteria use photosynthetic pigments, such as carotenoids, phycobilins, and various forms of chlorophyll, which absorb energy from light. Unlike heterotrophic prokaryotes, cyanobacteria have internal membranes. These are flattened sacs called thylakoids where photosynthesis is performed. Phototrophic eukaryotes such as green plants perform photosynthesis in plastids tha ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
The All-Species Living Tree Project
The All-Species Living Tree' Project is a collaboration between various academic groups/institutes, such as ARB Project, ARB, SILVA rRNA database project, and List of Prokaryotic names with Standing in Nomenclature, LPSN, with the aim of assembling a database of 16S ribosomal RNA, 16S rRNA sequences of all validly published species of ''Bacteria'' and ''Archaea''. At one stage, 23S ribosomal RNA, 23S sequences were also collected, but this has since stopped. Currently there are over 10,950 species in the aligned dataset and several more are being added either as new species are discovered or species that are not represented in the database are sequenced. Initially the latter group consisted of 7% of species. Similar (and more recent) projects include the Genomic Encyclopedia of Bacteria and Archaea (GEBA), which focused on whole genome sequencing of bacteria and archaea. Tree The tree was created by maximum likelihood analysis without bootstrap: consequently accuracy is traded ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
