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Pseudomonadota is a major phylum of Gram-negative bacteria. The renaming of several prokaryote phyla in 2021, including Pseudomonadota, remains controversial among microbiologists, many of whom continue to use the earlier name Proteobacteria, of long standing in the literature. The phylum Proteobacteria includes a wide variety of pathogenic genera, such as Escherichia, Salmonella, Vibrio, Yersinia, Legionella, and many others. Others are free-living (non-parasitic) and include many of the bacteria responsible for nitrogen fixation.
The Rickettsiales, informally called rickettsias, are an order of small Alphaproteobacteria. They are obligate intracellular parasites, and some are notable pathogens, including Rickettsia, which causes a variety of diseases in humans, and Ehrlichia, which causes diseases in livestock. Another genus of well-known Rickettsiales is the Wolbachia, which infect about two-thirds of all arthropods and nearly all filarial nematodes. Genetic studies support the endosymbiotic theory according to which mitochondria and related organelles developed from members of this group.
The Hyphomicrobiales are an order of Gram-negative Alphaproteobacteria.
The Aurantimonadaceae are a small family of marine bacteria.
The Hyphomicrobiaceae are a family of bacteria. Among others, they include Rhodomicrobium, a genus of purple bacteria.
Alphaproteobacteria is a class of bacteria in the phylum Pseudomonadota. The Magnetococcales and Mariprofundales are considered basal or sister to the Alphaproteobacteria. The Alphaproteobacteria are highly diverse and possess few commonalities, but nevertheless share a common ancestor. Like all Proteobacteria, its members are gram-negative and some of its intracellular parasitic members lack peptidoglycan and are consequently gram variable.
In taxonomy, the Hyphomonadaceae are a family of the Caulobacterales.
The Sphingomonadales are an order of the Alphaproteobacteria.
Brucella anthropi is a bacterium. The type strain is strain CIP 82.115. O. anthropi strains are rod-shaped, aerobic, gram-negative, non-pigmented and motile by means of peritrichous flagella. They are emerging as major opportunistic pathogens.
The Magnetococcales were an order of Alphaproteobacteria, but now the mitochondria are considered as sister to the alphaproteobactera, together forming the sister the marineproteo1 group, together forming the sister to Magnetococcidae.
Magnetococcus marinus is a species of Alphaproteobacteria that has the peculiar ability to form a structure called a magnetosome, a membrane-encased, single-magnetic-domain mineral crystal formed by biomineralisation, which allows the cells to orient along the Earth’s geomagnetic field. The Magnetococcus marinus grows chemolithoautotrophically with thiosulfate and chemoorganoheterotrophically on acetate.
Erythrobacteraceae is a bacterium family in the order of Sphingomonadales.
Kaistiaceae is a family of Alphaproteobacteria.
Pleomorphomonadaceae is a family of Alphaproteobacteria.
Amorphaceae is a family of Alphaproteobacteria.
Chelatococcaceae is a family of Alphaproteobacteria.
Salinarimonadaceae is a family of Alphaproteobacteria.
Segnochrobactrum spirostomi is a species of Alphaproteobacteria.
Magnetococcus is a genus of Alphaproteobacteria.
The Temperatibacteraceae are a family of bacteria.
References
- ↑ Bazylinski DA, Williams TJ, Lefevre CT, Berg RJ, Zhang CL, Bowser SS, Dean AJ, Beveridge TJ (2013). "Magnetococcus marinus gen. nov., sp. nov., a marine, magnetotactic bacterium that represents a novel lineage (Magnetococcaceae fam. nov., Magnetococcales ord. nov.) at the base of the Alphaproteobacteria". Int J Syst Evol Microbiol. 63 (Pt 3): 801–808. doi:10.1099/ijs.0.038927-0. PMID 22581902.
- 1 2 Euzéby JP, Parte AC. "Magnetococcaceae". List of Prokaryotic names with Standing in Nomenclature (LPSN). Retrieved June 2, 2021.
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