Natrialbales

Natrialbales is an order of halophilic, chemoorganotrophic archaea within the class Haloarchaea.[2] The type genus of this order is Natrialba.[1]

Natrialbales
Scientific classification
Domain: Archaea
Kingdom: Euryarchaeota
Class: Halobacteria
Order: Natrialbales
Gupta et al. 2015
Genus[1]

The name Natrialbales is derived from the Latin term Natriabla, referring to the type genus of the order and the suffix "-ales", an ending used to denote an order. Together, Natrialbales refers to an order whose nomenclatural type is the genus Natrialba.

Biochemical characteristics and molecular signatures[2]

Members are halophilic chemoorganotrophs and are mainly isolated from high-salt environments such as saline lakes, soda lakes and salted hides. Some members are motile. Morphology is variable, including rod, coccus or pleomorphic shapes. Majority of the class are able to grow optimally in alkaline pH and do not possess gas vesicles. The DNA G+C content for this order ranges between 60-70 mol%.

This order can be reliably distinguished from other orders within the phylum Euryarchaeota by the presence of eight conserved signature proteins (CSPs) and two conserved signature indels (CSIs) present in the ribosomal operon protein and small GTP-binding protein.[2]

Historical systematics and taxonomy

As of 2021, Natrialbales contains one family, Natrialbaceae.[1] Members of this order was demarcated from the class Halobacteria, previously a large phylogenetically unrelated group of species with distinct biochemical characteristics and different ecological niches.[3][4][5] 16S rRNA based phylogenetic trees and morphological/physiological characteristics were not sufficient to clarify the evolutionary relationship above the genus level within the class Halobacteria.

In 2015, Gupta et al. proposed the division of the class Halobacteria into Halobacteriales, Haloferacales and Natrialbales based on comparative genomic analyses and the branching pattern of various phylogenetic trees constructed from several different datasets of conserved proteins and 16S rRNA sequences.[2] Molecular markers, specifically conserved signature indels, specific to this order were also identified as evidence supporting the division independent of phylogenetic trees.[2]

Phylogeny

The currently accepted taxonomy is based on the List of Prokaryotic names with Standing in Nomenclature (LPSN)[6] and National Center for Biotechnology Information (NCBI).[7]

16S rRNA-based LTP_01_2022[8][9][10] 53 marker proteins based GTDB 07-RS207[11][12][13]
 
 
 

Halorubellus *

 
 

Haloarchaeobius *

 
 
 
 
 

Natronoarchaeum {"Natronoarchaeaceae"} *

 
 

Salinarchaeum {"Salinarchaeaceae"}

 
 
Natrialbaceae
 
 

Halovivax 2

 
 
 
 

Natronobiforma Sorokin et al. 2019

 
 

Saliphagus Yin et al. 2017

 
 
 
 

Halovarius Mehrshad et al. 2015 *

 
 

Natribaculum Liu et al. 2015 *

 
 
 
 
 
 
 
 

Natronobacterium Tindall et al. 1984

 
 

Halobiforma Hezayen et al. 2002

 
 
 
 

Halovivax Castillo et al. 2006

 
 

Natronococcus Tindall et al. 1984

 
 
 
 
 
 
 

Natrarchaeobaculum Sorokin et al. 2020

 
 
 

Natronolimnohabitans Sorokin et al. 2020

 
 
 

Natronolimnobius Itoh et al. 2005

 
 

Salinadaptatus Xue et al. 2020

 
 
 
 
 

Halopiger Gutierrez et al. 2007

 
 
 
 
 

Natrarchaeobius halalkaliphilus

 
 
 

Natronorubrum Xu et al. 1999

 
 

Natrialba Kamekura & Dyall-Smith 1996 (incl. Natrarchaeobius)

 
 
 
 
 
 

Natrinema 2

 
 

Halostagnicola Castillo et al. 2006

 
 
 
 

Haloterrigena 2

 
 
 

Haloterrigena Ventosa et al. 1999

 
 

Natrinema McGenity et al. 1998

 
 
 
 
 
 
 
 
 
 
Natrialbaceae
 
 

Halorubellus

 
 

Haloarchaeobius

 
 
 
 

Halovivax

 
 
 

Saliphagus

 
 
 

Halostagnicola

 
 
 

Natronococcus

 
 
 
 
 

Halopiger goleimassiliensis

 
 

Natrarchaeobaculum

 
 
 
 

Salinadaptatus

 
 

Natrarchaeobius corrig. Sorokin et al. 2020

 
 
 
 
 
 
 

Halopiger

 
 
 

Halopiger djelfimassiliensis

 
 
 

Natronobacterium

 
 

Halobiforma

 
 
 
 
 
 

Natronolimnobius

 
 

Natrialba

 
 
 
 
 
 
 

Natronolimnohabitans

 
 

Haloterrigena

 
 
 

Natronorubrum

 
 
 

Natrinema

 
 
 
 
 
 
 
 
 

Note: * paraphyletic Halobacteriaceae

See also

References
  1. "Order: Natrialbales". lpsn.dsmz.de. Retrieved 2022-07-12.
  2. Gupta, Radhey S.; Naushad, Sohail; Baker, Sheridan (2015-03-01). "Phylogenomic analyses and molecular signatures for the class Halobacteria and its two major clades: a proposal for division of the class Halobacteria into an emended order Halobacteriales and two new orders, Haloferacales ord. nov. and Natrialbales ord. nov., containing the novel families Haloferacaceae fam. nov. and Natrialbaceae fam. nov". International Journal of Systematic and Evolutionary Microbiology. 65 (Pt_3): 1050–1069. doi:10.1099/ijs.0.070136-0. ISSN 1466-5026. PMID 25428416.
  3. Hirsch, Peter (2005), "Dichotomicrobium Hirsch and Hoffman 1989b, 495VP (Effective publication: Hirsch and Hoffman 1989a, 300)", Bergey’s Manual® of Systematic Bacteriology, New York: Springer-Verlag, pp. 513–518, doi:10.1007/0-387-29298-5_124, ISBN 0-387-24145-0, retrieved 2021-06-27
  4. Grant, William D.; Kamekura, Masahiro; McGenity, Terry J.; Ventosa, Antonio (2015-09-14). "Halobacteria class. nov". Bergey's Manual of Systematics of Archaea and Bacteria: 1. doi:10.1002/9781118960608.cbm00026. ISBN 9781118960608.
  5. Oren, Aharon (2012-02-01). "Taxonomy of the family Halobacteriaceae: a paradigm for changing concepts in prokaryote systematics". International Journal of Systematic and Evolutionary Microbiology. 62 (2): 263–271. doi:10.1099/ijs.0.038653-0. ISSN 1466-5026. PMID 22155757.
  6. J.P. Euzéby. "Natrialbales". List of Prokaryotic names with Standing in Nomenclature (LPSN). Retrieved 2021-11-17.
  7. Sayers; et al. "Natrialbales". National Center for Biotechnology Information (NCBI) taxonomy database. Retrieved 2022-06-05.
  8. "The LTP". Retrieved 23 February 2022.
  9. "LTP_all tree in newick format". Retrieved 23 February 2022.
  10. "LTP_01_2022 Release Notes" (PDF). Retrieved 23 February 2022.
  11. "GTDB release 07-RS207". Genome Taxonomy Database. Retrieved 20 June 2022.
  12. "ar53_r207.sp_labels". Genome Taxonomy Database. Retrieved 20 June 2022.
  13. "Taxon History". Genome Taxonomy Database. Retrieved 20 June 2022.
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