Archives of Microbiology

, Volume 194, Issue 5, pp 315–322 | Cite as

Characterization of Deinococcus sahariens sp. nov., a radiation-resistant bacterium isolated from a Saharan hot spring

  • Hanene Bouraoui
  • Melek Ben Aissa
  • Feten Abbassi
  • Jean Pierre Touzel
  • Michael O’donohue
  • Mohamed Manai
Original Paper


An ultraviolet-radiation-resistant, Gram-positive, orange-pigmented, thermophilic and strictly aerobic cocci was isolated from Saharan water hot spring in Tunisia. The newly isolated bacterium, designated HAN-23T, was identified based on polyphasic taxonomy including genotypic, phenotypic and chemotaxonomic characterization. Phylogenetic analysis based on 16S rRNA gene sequences placed this strain within Deinococcus genus. However, strain HAN-23T is different from recognized species of the genus Deinococcus, showing less than 94.0% similarity values to its closest relatives. The predominant cellular fatty acids determined by gas chromatography were iso-C15:0, iso-C17:0 and iso C17:1 ω9c. The major respiratory quinone was MK-8. The DNA G + C content was 66.9 mol%. DNA–DNA hybridization measurements revealed low DNA relatedness (6%) between the novel isolate and its closest neighbor, the type strain Deinococcus geothermalis DSM 11300. On the basis of the phenotypic, chemotaxonomic and phylogenetic data, strain HAN-23T represents a novel species of the genus Deinococcus, for which the name Deinococcus sahariens sp. nov. is proposed, the type strain being HAN-23T (=DSM 18496T; LMG 23756T).


Taxonomy New species Sahara Hot spring Deinococcus UV resistance 



This work was supported by the Ministry of Higher Education and Scientific Research in Tunisia and the French Tunisian Mixed Committee of University Cooperation (CMCU Projects).

Supplementary material

203_2011_762_MOESM1_ESM.docx (920 kb)
Supplementary material 1 (DOCX 920 kb)


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Copyright information

© Springer-Verlag 2011

Authors and Affiliations

  • Hanene Bouraoui
    • 1
  • Melek Ben Aissa
    • 1
  • Feten Abbassi
    • 2
  • Jean Pierre Touzel
    • 3
  • Michael O’donohue
    • 4
  • Mohamed Manai
    • 1
  1. 1.Unité de Biochimie et Biologie MoléculaireUniversité de Tunis El ManarTunisTunisia
  2. 2.Peptidome de la Peau des Amphibiens FRE 2852- UPMC/CNRSUniversité Pierre et Marie CurieParisFrance
  3. 3.INRA, UMR FARE-URCA 614ReimsFrance
  4. 4.Université de Toulouse, INSA, LISBPToulouseFrance

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