Haloarcula
| Haloarcula | |
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| SEM image of Haloarcula quadrata . | |
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| Genus: | Haloarcula |
| Type species | |
| Haloarcula vallismortis (Gonzalez, Gutierrez & Ramirez 1979) Torreblanca et al. 1986
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See text | |
Haloarcula (common abbreviation Har.) is a genus of extreme halophilic Archaea in the class of Halobacteria.[2]
Cell Structure
[edit ]Haloarcula species can be distinguished from other genera in the family Halobacteriaceae by the presence of specific derivatives of TGD-2 polar lipids. H. quadrata has predominantly flat, square-shaped, somewhat pleomorphic cells.[3]
Metabolism
[edit ]H. quadrata was first isolated when researchers were attempting to culture Haloquadratum walsbyi , a haloarchaeon that was thought to be unculturable until 2004. Similar to other halophilic archaea, Haloarcula species grow optimally at 40–45 °C. Growth appears in sheets of up to 65 cells often in the shape of a square or triangle.
Taxonomy
[edit ]The genus of Haloarcula was long grouped with other halophilic archaea such as Halobacterium until genomic analysis prompted to reorder this genus in the new family of Haloarculaceae.
Phylogeny
[edit ]The currently accepted taxonomy is based on the List of Prokaryotic names with Standing in Nomenclature (LPSN)[4] and National Center for Biotechnology Information (NCBI).[1]
| 16S rRNA based LTP_10_2024[5] [6] [7] | 53 marker proteins based GTDB 09-RS220[8] [9] [10] |
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Haloarcula
H. mannanilytica H. terrestris Straková et al. 2023 | |
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H. sebkhae H. tradensis Namwong et al. 2011 | |
H. salaria Namwong et al. 2011
H. quadrata Oren et al. 1999
