1887

Abstract

A novel γ-radiation-resistant and Gram-staining-positive actinobacterium designated BMG 8133 was isolated from a limestone collected in the Sahara desert of Tunisia. The strain produced dry, pale-pink colonies with an optimum growth at 35–40 °C and pH 6.5–8.0. Chemotaxonomic and molecular characteristics of the isolate matched those described for members of the genus . The peptidoglycan contained -diaminopimelic acid as diagnostic diamino acid. The main polar lipids were phosphatidylcholine, diphosphatidylglycerol, phosphatidylinositol, phosphatidylethanolamine and one unspecified glycolipid. MK-9(H) was the dominant menaquinone. Galactose and glucose were detected as diagnostic sugars. The major cellular fatty acids were branched-chain saturated acids iso-C and iso-C. The DNA G+C content of the novel strain was 74.5 %. The 16S rRNA gene sequence showed highest sequence identity with (98.3 %). Based on phenotypic results and 16S rRNA gene sequence analysis, strain BMG 8133 is proposed to represent a novel species, Geodermatophilus sp. nov. The type strain is BMG 8133 ( = DSM 46844 = CECT 8820).

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2015-10-01
2019-10-16
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