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Haloferax
In taxonomy, ''Haloferax'' (common abbreviation: ''Hfx.'') is a genus of the Haloferacaceae. Genetic exchange Cells of ''H. mediterranei'' and cells of the related species '' H. volcanii'' can undergo a process of genetic exchange between two cells which involves cell fusion resulting in a heterodiploid cell (containing two different chromosomes in one cell). Although this genetic exchange ordinarily occurs between two cells of the same species, it can also occur at a lower frequency between an ''H. mediterranei'' and an ''H. volcani'' cell. These two species have an average nucleotide sequence identity of 86.6%. During this exchange process, a diploid cell is formed that contains the full genetic repertoire of both parental cells, and genetic recombination is facilitated. Subsequently, the cells separate, giving rise to recombinant cells. Taxonomy As of 2022, 13 species are validly published under the genus ''Haloferax''. ;Proposed species Several species and novel binomial ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Haloferax Namakaokahaiae
In taxonomy, ''Haloferax'' (common abbreviation: ''Hfx.'') is a genus of the Haloferacaceae. Genetic exchange Cells of ''H. mediterranei'' and cells of the related species '' H. volcanii'' can undergo a process of genetic exchange between two cells which involves cell fusion resulting in a heterodiploid cell (containing two different chromosomes in one cell). Although this genetic exchange ordinarily occurs between two cells of the same species, it can also occur at a lower frequency between an ''H. mediterranei'' and an ''H. volcani'' cell. These two species have an average nucleotide sequence identity of 86.6%. During this exchange process, a diploid cell is formed that contains the full genetic repertoire of both parental cells, and genetic recombination is facilitated. Subsequently, the cells separate, giving rise to recombinant cells. Taxonomy As of 2022, 13 species are validly published under the genus ''Haloferax''. ;Proposed species Several species and novel binomial ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Haloferax Mediterranei
''Haloferax mediterranei'' is a species of archaea in the family Haloferacaceae. Discovery ''Haloferax mediterranei'' was discovered in 1983 in marine salterns in the village of Santa Pola, Spain. The species was initially named ''Halobacterium mediterranei'', then renamed ''Haloferax mediterranei'' in 1986. Haloferax mediterranei is the fastest-growing known member of the Halobacteriales under optimal laboratory conditions, but it is relatively rare in the environment. The full genome of ''H. mediterranei'' was sequenced in 2012. Metabolism and Growth Conditions ''Haloferax mediterranei'' is the fastest-growing archaeon in the Halobacteriales family, with generation times as low as 1.2 hours reported under optimal laboratory growth conditions. ''Haloferax mediterranei'' is able to use a variety of compounds as carbon and energy sources, and can accumulate materials to serve as a source of carbon and energy, as well as use organic and inorganic nitrogen sources. ''H. mediterrane ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Haloferax Volcanii
''Haloferax volcanii'' is a species of organism in the genus ''Haloferax'' in the Archaea. Description and significance Microbiologist Benjamin Elazari Volcani first discovered ''Haloferax volcanii'', a self-named extremophile, in the 1930s. ''H. volcanii'' is a halophilic mesophile archaeon that can be isolated from hypersaline environments such as: the Dead Sea, the Great Salt Lake, and oceanic environments with high sodium chloride concentrates. ''Haloferax volcanii'' is noteworthy because it can be cultured without much difficulty, rare for an extremophile. ''H. volcanii'' is chemoorganotrophic, metabolizing sugars as a carbon source. It is primarily aerobic, but is capable of anaerobic respiration under anoxic conditions. Recently an isolate of this species was studied by researchers at University of California, Berkeley, as part of a project on the survival of haloarchaea on Mars. Genome structure The genome of ''H. volcanii'' consists of a large (4 Mb), multicopy chrom ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Haloferax Larsenii
''Haloferax larsenii'' is a gram-negative, aerobic, neutrophilic, extremely halophilic archaeon. It was named in honor of Professor Helge Larsen, who pioneered research on halophiles. Discovery ''Haloferax larsenii'' was isolated from a solar saltern in the Zhoushan archipelago, Zhejiang Province, China. The researchers who discovered this species isolated three strains of ''H. larsenii''. When this species was discovered, the genus ''Haloferax'' comprised ''Haloferax volcanii'', ''H. mediterranei'', ''H. denitrificans'', ''H. gibbonsii'', ''H. alexandrinus'', ''H. lucentense'', and ''H. sulfurifontis''. Since this time, ''H. prahovense'', ''H. elongans'', and ''H. mucosum'' have been discovered, which totals to 11 species in the genus. Diversity Like most species in ''Haloferax'', ''H. larsenii'' was isolated from an extremely salty environment consisting of a mixture of mud and brine. Phylogenetic position The species has been placed in a phylogeny: Characteristics Cells o ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Haloferacaceae
''Haloferacaceae'' is a family of halophilic, chemoorganotrophic or heterotrophic archaea within the order ''Haloferacales.'' The type genus of this family is ''Haloferax.'' Its biochemical characteristics are the same as the order ''Haloferacales.'' The name ''Haloferacaceae'' is derived from the Latin term ''Haloferax,'' referring to the type genus of the family and the suffix "-ceae", an ending used to denote a family. Together, ''Haloferacaceae'' refers to a family whose nomenclatural type is the genus ''Haloferax.'' Taxonomy and molecular signatures As of 2021, ''Haloferacaceae'' contains 10 validly published genera. This family can be molecularly distinguished from other Halobacteria by the presence of five conserved signature proteins (CSPs) and four conserved signature indels (CSIs) present in the following proteins: thermosome, ribonuclease BN and hypothetical proteins. Phylogeny The currently accepted taxonomy is based on the List of Prokaryotic names with Standing i ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Haloferax Lucentense
''Haloferax lucentense'' is a halophilic archaeon in the family of Haloferacaceae ''Haloferacaceae'' is a family of halophilic, chemoorganotrophic or heterotrophic archaea within the order ''Haloferacales.'' The type genus of this family is ''Haloferax.'' Its biochemical characteristics are the same as the order ''Haloferacale .... References Archaea genera Archaea described in 2004 {{archaea-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Haloferax Elongans
''Haloferax elongans'' is a species of archaea in the family Haloferacaceae ''Haloferacaceae'' is a family of halophilic, chemoorganotrophic or heterotrophic archaea within the order ''Haloferacales.'' The type genus of this family is ''Haloferax.'' Its biochemical characteristics are the same as the order ''Haloferacale .... References External links Halobacteria Archaea described in 1986 {{Euryarchaeota-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Haloferax Mucosum
''Haloferax mucosum'' is a species of archaea in the family Haloferacaceae ''Haloferacaceae'' is a family of halophilic, chemoorganotrophic or heterotrophic archaea within the order ''Haloferacales.'' The type genus of this family is ''Haloferax.'' Its biochemical characteristics are the same as the order ''Haloferacale .... References External links Halobacteria Archaea described in 2008 {{Euryarchaeota-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Haloferax Chudinovii
''Haloferax chudinovii'' is a species of archaea in the family Haloferacaceae ''Haloferacaceae'' is a family of halophilic, chemoorganotrophic or heterotrophic archaea within the order ''Haloferacales.'' The type genus of this family is ''Haloferax.'' Its biochemical characteristics are the same as the order ''Haloferacale .... The species was described in 2013. References {{Taxonbar, from=Q25860175 Halobacteria Taxa described in 2013 ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Haloferax Sulfurifontis
''Haloferax sulfurifontis'' is a species of archaea in the family Haloferacaceae ''Haloferacaceae'' is a family of halophilic, chemoorganotrophic or heterotrophic archaea within the order ''Haloferacales.'' The type genus of this family is ''Haloferax.'' Its biochemical characteristics are the same as the order ''Haloferacale .... References External links Halobacteria Archaea described in 2004 {{Euryarchaeota-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Haloferax Prahovense
''Haloferax prahovense'' is a species of archaea in the family Haloferacaceae ''Haloferacaceae'' is a family of halophilic, chemoorganotrophic or heterotrophic archaea within the order ''Haloferacales.'' The type genus of this family is ''Haloferax.'' Its biochemical characteristics are the same as the order ''Haloferacale .... References External links Halobacteria Archaea described in 2007 {{Euryarchaeota-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Haloferacales
''Haloferacales'' is an order of halophilic, chemoorganotrophic or heterotrophic archaea within the class Haloarchaea. The type genus of this order is ''Haloferax.'' The name ''Haloferacales'' is derived from the Latin term ''Haloferax,'' referring to the type genus of the order and the suffix "-ales," an ending used to denote an order. Together, ''Haloferacales'' refers to an order whose nomenclatural type is the genus ''Haloferax.'' Biochemical Characteristics and Molecular Signatures Members are halophiles and can be chemoorganotrophs or heterotrophs and are isolated from high-salt environments such as marine solar salterns and the Dead Sea. Some members are motile and contain gas vesicles. Morphology is variable, including rod, coccus or flat square shapes. Members of this order grow optimally in neutral pH. The DNA G+C content for this order ranges between 55-66 mol%. This order can be reliably distinguished from other Halobacteria by the presence of five conserved signatu ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |