Deinococci Garrity & Holt, 2002
- Dataset
- English Wikipedia - Species Pages
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Classification
- class
- Deinococci
Abstract
Deinococcota (synonym, Deinococcus-Thermus) is a phylum of bacteria with a single class, Deinococci, that are highly resistant to environmental hazards, also known as extremophiles. These bacteria have thick cell walls that give them gram-positive stains, but they include a second membrane and so are closer in structure to those of gram-negative bacteria.
Molecular signatures
Molecular signatures in the form of conserved signature indels (CSIs) and proteins (CSPs) have been found that are uniquely shared by all members belonging to the Deinococcota phylum. These CSIs and CSPs are distinguishing characteristics that delineate the unique phylum from all other bacterial organisms, and their exclusive distribution is parallel with the observed differences in physiology. CSIs and CSPs have also been found that support order and family-level taxonomic rankings within the phylum. Some of the CSIs found to support order level distinctions are thought to play a role in the respective extremophilic characteristics. The CSIs found in DNA-directed RNA polymerase subunit beta and DNA topoisomerase I in Thermales species may be involved in thermophilicity, while those found in Excinuclease ABC, DNA gyrase, and DNA repair protein RadA in Deinococcales species may be associated with radioresistance. Two CSPs that were found uniquely for all members belonging to the Deinococcus genus are well characterized and are thought to play a role in their characteristic radioresistant phenotype. These CSPs include the DNA damage repair protein PprA the single-stranded DNA-binding protein DdrB. Additionally, some genera within this group, including Deinococcus, Thermus, and Meiothermus, also have molecular signatures that demarcate them as individual genera, inclusive of their respective species, providing a means to distinguish them from the rest of the group and all other bacteria. CSIs have also been found specific for Truepera radiovictrix .
Phylogeny
The phylogeny is based on 16S rRNA-based LTP release 123 by 'The All-Species Living Tree' Project.'The All-Species Living Tree' Project.
Note: ♠ Strains found at the National Center for Biotechnology Information (NCBI) but not listed in the List of Prokaryotic names with Standing in Nomenclature (LSPN)
Note: ♠ Strains found at the National Center for Biotechnology Information (NCBI) but not listed in the List of Prokaryotic names with Standing in Nomenclature (LSPN)
Sequenced genomes
Currently there are 10 sequenced genomes of strains in this phylum.
Deinococcus radiodurans R1 Thermus thermophilus HB27 Thermus thermophilus HB8 Deinococcus geothermalis DSM 11300 Deinococcus deserti VCD115 Meiothermus ruber DSM 1279 Meiothermus silvanus DSM 9946 Truepera radiovictrix DSM 17093 Oceanithermus profundus DSM 14977
The two Meiothermus species were sequenced under the auspices of the Genomic Encyclopedia of Bacteria and Archaea project (GEBA), which aims at sequencing organisms based on phylogenetic novelty and not on pathogenicity or notoriety.
Deinococcus radiodurans R1 Thermus thermophilus HB27 Thermus thermophilus HB8 Deinococcus geothermalis DSM 11300 Deinococcus deserti VCD115 Meiothermus ruber DSM 1279 Meiothermus silvanus DSM 9946 Truepera radiovictrix DSM 17093 Oceanithermus profundus DSM 14977
The two Meiothermus species were sequenced under the auspices of the Genomic Encyclopedia of Bacteria and Archaea project (GEBA), which aims at sequencing organisms based on phylogenetic novelty and not on pathogenicity or notoriety.
Taxonomy
The currently accepted taxonomy is based on the List of Prokaryotic names with Standing in Nomenclature (LPSN) and National Center for Biotechnology Information (NCBI)
Phylum Deinococcota (synonym, Deinococcus-Thermus) Oren and Garrity 2021 Class Deinococci Garrity & Holt 2002 ["Hadobacteria" Cavalier-Smith 1992 emend. Cavalier-Smith 1998; Hadobacteria Cavalier-Smith 2002; "Xenobacteria"] Order Deinococcales Rainey et al. 1997 Family Deinococcaceae Brooks and Murray 1981 emend. Rainey et al. 1997 Genus Deinococcus Brooks and Murray 1981 emend. Rainey et al. 1997 Genus Deinobacterium Ekman et al. 2011 Family Trueperaceae Rainey et al. 2005 Genus Truepera da Costa, Rainey and Albuquerque 2005 Order Thermales Rainey and Da Costa 2002 Family Thermaceae Da Costa and Rainey 2002 Genus Thermus Brock and Freeze 1969 emend. Nobre et al. 1996 Genus Meiothermus Nobre et al. 1996 emend. Albuquerque et al. 2009 Genus Marinithermus Sako et al. 2003 Genus Oceanithermus Miroshnichenko et al. 2003 emend. Mori et al. 2004 Genus Rhabdothermus Steinsbu et al. 2011 Genus Vulcanithermus Miroshnichenko et al. 2003
Phylum Deinococcota (synonym, Deinococcus-Thermus) Oren and Garrity 2021 Class Deinococci Garrity & Holt 2002 ["Hadobacteria" Cavalier-Smith 1992 emend. Cavalier-Smith 1998; Hadobacteria Cavalier-Smith 2002; "Xenobacteria"] Order Deinococcales Rainey et al. 1997 Family Deinococcaceae Brooks and Murray 1981 emend. Rainey et al. 1997 Genus Deinococcus Brooks and Murray 1981 emend. Rainey et al. 1997 Genus Deinobacterium Ekman et al. 2011 Family Trueperaceae Rainey et al. 2005 Genus Truepera da Costa, Rainey and Albuquerque 2005 Order Thermales Rainey and Da Costa 2002 Family Thermaceae Da Costa and Rainey 2002 Genus Thermus Brock and Freeze 1969 emend. Nobre et al. 1996 Genus Meiothermus Nobre et al. 1996 emend. Albuquerque et al. 2009 Genus Marinithermus Sako et al. 2003 Genus Oceanithermus Miroshnichenko et al. 2003 emend. Mori et al. 2004 Genus Rhabdothermus Steinsbu et al. 2011 Genus Vulcanithermus Miroshnichenko et al. 2003