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Deinococcus peraridilitoris sp. nov., isolated from a coastal desert

¹ Department of Biological Sciences, 202 Life Sciences Building, Louisiana State University, Baton Rouge, LA 70803, USA
² Departamento de Bioquímica and Centro de Neurociências e Biologia Celular, Universidade de Coimbra, 3004-517 Coimbra, Portugal
³ Departamento de Zoologia, Universidade de Coimbra, 3004-517 Coimbra, Portugal
⁴ Instituto del Desierto y Unidad de Bioquímica, Facultad Ciencias de la Salud, Universidad de Antofagasta, Casilla 170, Antofagasta, Chile
⁵ Space Science Division, NASA Ames Research Center, Moffett Field, CA 94035, USA

Correspondence
Fred A. Rainey
frainey{at}lsu.edu

Three ionizing-radiation-resistant bacterial strains (designated KR-196, KR-198 and KR-200^T) were isolated from a sample of arid soil collected from a coastal desert in Chile. The soil sample was irradiated before serial dilution plating was performed using one-tenth-strength plate count agar. Phylogenetic analysis of the 16S rRNA gene sequences showed these organisms to represent a novel species of the genus Deinococcus, having sequence similarities of 87.3–90.8 % with respect to recognized Deinococcus species. Strains KR-196, KR-198 and KR-200^T were aerobic and showed optimum growth at 30 °C and pH 6.5–8.0. The major respiratory menaquinone was MK-8. The predominant fatty acids in these strains were 16 : 17c, 16 : 0, 15 : 16c, 17 : 0 and 18 : 0. The DNA G+C content of strain KR-200^T was 63.9 mol%. Strains KR-196, KR-198 and KR-200^T were found to be resistant to >10 kGy gamma radiation. On the basis of the phylogenetic, chemotaxonomic and phenotypic data, strain KR-200^T represents a novel species of the genus Deinococcus, for which the name Deinococcus peraridilitoris sp. nov. is proposed. The type strain is KR-200^T (=LMG 22246^T=CIP 109416^T).

Fatty acid compositions for strains KR-200^T, KR-198, KR-196 and species of the genus Deinococcus are shown in a supplementary table available with the online version of this paper.

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				R. P. Callegan, M. F. Nobre, P. M. McTernan, J. R. Battista, R. Navarro-Gonzalez, C. P. McKay, M. S. da Costa, and F. A. Rainey Description of four novel psychrophilic, ionizing radiation-sensitive Deinococcus species from alpine environments Int J Syst Evol Microbiol, May 1, 2008; 58(5): 1252 - 1258. [Abstract] [Full Text] [PDF]