Halorubrum

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Halorubrum
Scientific classification
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Halorubrum

McGenity and Grant 1996 [1]
Type species
Halorubrum saccharovorum
(Tomlinson & Hochstein 1977) McGenity & Grant 1996
Species

See text

Synonyms
  • HalorubrobacteriumKamekura and Dyall-Smith 1996 [1]

Halorubrum is a genus in the family Halorubraceae. Halorubrum species are usually halophilic and can be found in waters with high salt concentration such as the Dead Sea or Lake Zabuye.

Contents

Genetic exchange

A population of the haloarchaea Halorubrum in its natural high salt concentration environment exchanged genetic information frequently by recombination. [2] This population exhibited a degree of linkage equilibrium approaching that of a sexual population.

Taxonomy

In taxonomy, Halorubrum is a genus of the Halobacteriaceae. [3]

Species

Halorubrum ejinorense was first isolated from Lake Ejinor in Inner Mongolia, China. [4]

Halorubrum lacusprofundi was first isolated in the 1980s from Deep Lake, Antarctica. [5] Its genome, sequenced in 2008, consists of two chromosomes (one 2.74 Mb and the other 0.53 Mb) and one plasmid (0.43 Mb). [6] Its β-galactosidase enzyme has been extensively studied to understand how proteins function in low-temperature, high-saline environments. [7] [8] One strain of H. lacusprofundi contains a plasmid for horizontal gene transfer, which takes place via a mechanism that uses vesicle-enclosed virus-like particles. [9]

Halorubrum sodomense was first identified in the Dead Sea in 1980. It requires a higher concentration of Mg2+ ions for growth than related halophiles. [10] Its cell surface membrane contains Archaerhodopsin-3 (AR3), a photoreceptor protein which harvests the energy from sunlight to establish a proton motive force that is used for ATP synthesis. [11] [12] Mutants of AR3 are widely used as tools in optogenetics for neuroscience research. [13]

Halorubrum tibetense was first isolated from Lake Zabuye in Tibet, China. [14]

Halorubrum xinjiangense was first isolated from Xiao-Er-Kule Lake in Xinjiang, China. [15]

Proposed species

Several species and novel binomial names have been proposed, but not validly published. published.

Phylogeny

The currently accepted taxonomy is based on the List of Prokaryotic names with Standing in Nomenclature (LPSN) [1] and National Center for Biotechnology Information (NCBI). [3]

16S rRNA based LTP_06_2022 [28] [29] [30] 53 marker proteins based GTDB 08-RS214 [31] [32] [33]
Halorubrum

H. gandharaenseKondô et al. 2015

H. luteum Hu et al. 2008

H. vacuolatum (Mwatha & Grant 1993) Kamekura et al. 1997

H. alkaliphilum Feng et al. 2005

H. tibetense Fan et al. 2004

H. aquaticumGutierrez et al. 2011

H. haloduransCorral et al. 2016

H. cibiRoh & Bae 2009

H. glutamatedensXu et al. 2019

H. aethiopicumGibtan et al. 2018

H. rubrumQiu et al. 2014

H. orientale Castillo et al. 2006

H. trueperiChen et al. 2017

H. lacusprofundi (Franzmann et al. 1989) McGenity & Grant 1996

H. salsamentiChen et al. 2019

H. kocurii Gutierrez et al. 2008

H. aidingense Cui et al. 2006

H. yunnanenseChen et al. 2015

H. depositumChen et al. 2019

H. rutilumYin et al. 2016

H. halophilumYim et al. 2014

H. lipolyticum Cui et al. 2006

H. amylolyticumSun et al. 2019

H. persicumCorral et al. 2015

H. saccharovorum (Tomlinson & Hochstein 1977) McGenity & Grant 1996

H. pallidumChen et al. 2016

H. laminariaeHan & Cui 2015

H. salinumZhang & Cui 2014

H. distributum (Zvyagintseva & Tarasov 1989) Oren & Ventosa 1996

H. ejinorense Castillo et al. 2007

H. tebenquichense Lizama et al. 2002

H. sodomense (Oren 1983) McGenity & Grant 1996

H. californiense Pesenti et al. 2008

H. ezzemoulense Kharroub et al. 2006

H. coriense (Kamekura & Dyall-Smith 1996) Oren & Ventosa 1996

H. trapanicum (Petter 1931) McGenity & Grant 1996

H. salinarumHan et al. 2022

H. xinjiangense Feng et al. 2004

Halorubrum

H. vacuolatum

H. alkaliphilum

H. aquaticum

H. cibi

H. rubrum

H. aethiopicum

H. halodurans

H. laminariae

H. salinum

H. aidingense

H. depositum

H. rutilum

H. lacusprofundi

H. persicum

H. saccharovorum

"H. salipaludis" Gong et al. 2021

H. halophilum

H. amylolyticum

H. salsamenti

Related Research Articles

A halophile is an extremophile that thrives in high salt concentrations. In chemical terms, halophile refers to a Lewis acidic species that has some ability to extract halides from other chemical species.

<i>Halobacterium</i> Genus of archaea

Halobacterium is a genus in the family Halobacteriaceae.

Halobacteriaceae is a family in the order Halobacteriales and the domain Archaea. Halobacteriaceae represent a large part of halophilic Archaea, along with members in two other methanogenic families, Methanosarcinaceae and Methanocalculaceae. The family consists of many diverse genera that can survive extreme environmental niches. Most commonly, Halobacteriaceae are found in hypersaline lakes and can even tolerate sites polluted by heavy metals. They include neutrophiles, acidophiles, alkaliphiles, and there have even been psychrotolerant species discovered. Some members have been known to live aerobically, as well as anaerobically, and they come in many different morphologies. These diverse morphologies include rods in genus Halobacterium, cocci in Halococcus, flattened discs or cups in Haloferax, and other shapes ranging from flattened triangles in Haloarcula to squares in Haloquadratum, and Natronorubrum. Most species of Halobacteriaceae are best known for their high salt tolerance and red-pink pigmented members, but there are also non-pigmented species and those that require moderate salt conditions. Some species of Halobacteriaceae have been shown to exhibit phosphorus solubilizing activities that contribute to phosphorus cycling in hypersaline environments. Techniques such as 16S rRNA analysis and DNA-DNA hybridization have been major contributors to taxonomic classification in Halobacteriaceae, partly due to the difficulty in culturing halophilic Archaea.

<span class="mw-page-title-main">Halobacteriales</span> Order of archaea

Halobacteriales are an order of the Halobacteria, found in water saturated or nearly saturated with salt. They are also called halophiles, though this name is also used for other organisms which live in somewhat less concentrated salt water. They are common in most environments where large amounts of salt, moisture, and organic material are available. Large blooms appear reddish, from the pigment bacteriorhodopsin. This pigment is used to absorb light, which provides energy to create ATP. Halobacteria also possess a second pigment, halorhodopsin, which pumps in chloride ions in response to photons, creating a voltage gradient and assisting in the production of energy from light. The process is unrelated to other forms of photosynthesis involving electron transport; however, and halobacteria are incapable of fixing carbon from carbon dioxide.

<span class="mw-page-title-main">Haloarchaea</span> Class of salt-tolerant archaea

Haloarchaea are a class of prokaryotic organisms under the archaeal phylum Euryarchaeota, found in water saturated or nearly saturated with salt. Halobacteria are now recognized as archaea rather than bacteria and are one of the largest groups. The name 'halobacteria' was assigned to this group of organisms before the existence of the domain Archaea was realized, and while valid according to taxonomic rules, should be updated. Halophilic archaea are generally referred to as haloarchaea to distinguish them from halophilic bacteria.

<i>Haloarcula</i> Genus of archaea

Haloarcula is a genus of extreme halophilic Archaea in the class of Halobactaria.

Halopiger is a genus of archaeans in the family Natrialbaceae that have high tolerance to salinity.

In taxonomy, Haloplanus is a genus of the Halobacteriaceae.

Haloterrigena is a genus of the Natrialbaceae.

In taxonomy, Halovivax is a genus of the Natrialbaceae. Some species of Halovivax are halophiles and have been found in Iran's Aran-Bidgol hypersaline lake.

In taxonomy, Natrialba is a genus of the Natrialbaceae. The genus consists of many diverse species that can survive extreme environmental niches, especially they are capable to live in the waters saturated or nearly saturated with salt (halophiles). They have certain adaptations to live within their salty environments. For example, their cellular machinery is adapted to high salt concentrations by having charged amino acids on their surfaces, allowing the cell to keep its water molecules around these components. The osmotic pressure and these amino acids help to control the amount of salt within the cell.

In taxonomy, Natronococcus is a genus of the Natrialbaceae.

Natronomonas is a genus of the Halobacteriaceae.

Natronorubrum is a genus in the family Halobacteriaceae.

<i>Halorubrum lacusprofundi</i> Species of archaeon

Halorubrum lacusprofundi is a rod-shaped, halophilic Archaeon in the family of Halorubraceae. It was first isolated from Deep Lake in Antarctica in the 1980s.

<span class="mw-page-title-main">Archaerhodopsin</span> Family of archaea

Archaerhodopsin proteins are a family of retinal-containing photoreceptors found in the archaea genera Halobacterium and Halorubrum. Like the homologous bacteriorhodopsin (bR) protein, archaerhodopsins harvest energy from sunlight to pump H+ ions out of the cell, establishing a proton motive force that is used for ATP synthesis. They have some structural similarities to the mammalian G protein-coupled receptor protein rhodopsin, but are not true homologs.

Haloferacales is an order of halophilic, chemoorganotrophic or heterotrophic archaea within the class Haloarchaea. The type genus of this order is Haloferax.

Halorubraceae is a family of halophilic, chemoorganotrophic or heterotrophic archaea within the order Haloferacales. The type genus of this family is Halorubrum. Its biochemical characteristics are the same as the order Haloferacales.

Halorubrum californiense is a halophilic Archaeon in the family of Halorubraceae. It was isolated from saline environments solar saltern in Newark, California.

Halorubrum kocurii is a halophilic archaean belonging to the genus Halorubrum. This genus contains a total of thirty-seven different species, all of which thrive in high-salinity environments. Archaea belonging to this genus are typically found in hypersaline environments due to their halophilic nature, specifically in solar salterns. Halorubrum kocurii is a rod-shaped, Gram-negative archaeon. Different from its closest relatives, Halorubrum kocurii is non-motile and contains no flagella or cilia. This archaeon thrives at high pH levels, high salt concentrations, and moderate temperatures. It has a number of close relatives, including Halorubrum aidingense, Halorubrum lacusprofundi, and more.

References

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Further reading

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