Zetaproteobacteria
Class of bacteria / From Wikipedia, the free encyclopedia
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The class Zetaproteobacteria is the sixth and most recently described class of the Pseudomonadota.[1] Zetaproteobacteria can also refer to the group of organisms assigned to this class. The Zetaproteobacteria were originally represented by a single described species, Mariprofundus ferrooxydans,[2] which is an iron-oxidizing neutrophilic chemolithoautotroph originally isolated from Kamaʻehuakanaloa Seamount (formerly Loihi) in 1996 (post-eruption).[1][3] Molecular cloning techniques focusing on the small subunit ribosomal RNA gene have also been used to identify a more diverse majority of the Zetaproteobacteria that have as yet been unculturable.[4]
Zetaproteobacteria | |
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Class: | Zetaproteobacteria Makita et al. 2017 |
Order: | Mariprofundales Makita et al. 2017 |
Family: | Mariprofundaceae Hördt et al. 2020 |
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Regardless of culturing status, the Zetaproteobacteria show up worldwide in estuarine and marine habitats associated with opposing steep redox gradients of reduced (ferrous) iron and oxygen, either as a minor detectable component or as the dominant member of the microbial community.[5][6][7][8][9][10] Zetaproteobacteria have been most commonly found at deep-sea hydrothermal vents,[4] though recent discovery of members of this class in near-shore environments has led to the reevaluation of Zetaproteobacteria distribution and significance.[11][12][13]