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Kribbella aluminosa sp. nov., isolated from a medieval alum slate mine

Marc René Carlsohn¹, Ingrid Groth¹, Cathrin Spröer², Barbara Schütze¹, Hans-Peter Saluz¹, Thomas Munder^1, and Erko Stackebrandt²

¹ Leibniz-Institut für Naturstoff-Forschung und Infektionsbiologie e.V., Hans-Knöll-Institut, Beutenbergstraße 11a, 07745 Jena, Germany
² DSMZ – Deutsche Sammlung von Mikroorganismen und Zellkulturen GmbH, Inhoffenstraße 7b, 38124 Braunschweig, Germany

Correspondence
Ingrid Groth
Ingrid.Groth{at}hki-jena.de

Three actinomycetes (strains HKI 0478^T, HKI 0479 and HKI 0480) isolated from the surfaces of rocks in the Feengrotten medieval alum slate mine (Thuringia, Germany) were examined in a polyphasic taxonomic study. The following morphological and chemotaxonomic features supported their classification as members of the genus Kribbella: the presence of LL-diaminopimelic acid in the cell-wall peptidoglycan; glucose together with minor amounts of mannose and ribose as the whole-cell sugars; polar lipids comprising phosphatidylcholine, diphosphatidylglycerol, phosphatidylglycerol, phosphatidylinositol and unknown phospho- and glycolipids; fatty acid profiles characterized by the predominance of anteiso-C_{15 : 0}, iso-C_{16 : 0} and C_{16 : 0} 9-methyl; and the presence of MK-9(H₄) as the main menaquinone. The isolates had almost identical 16S rRNA gene sequences (99.9–100 %) and were most closely related to the type strains of Kribbella jejuensis (98.9 % sequence similarity), Kribbella swartbergensis and Kribbella solani (both 98.8 %). A wide range of genotypic and phenotypic markers as well as the low levels of DNA–DNA relatedness between strain HKI 0478^T and the type strains of K. jejuensis (41.3 %), K. swartbergensis (18.6 %) and K. solani (14.2 %) distinguished the novel strains from their closest phylogenetic neighbours. On the basis of these results, strain HKI 0478^T represents a novel member of the genus Kribbella, for which the name Kribbella aluminosa sp. nov. is proposed. The type strain is HKI 0478^T (=DSM 18824^T =JCM 14599^T).

The GenBank/EMBL/DDBJ accession numbers for the 16S rRNA gene sequences of strains HKI 0478^T, HKI 0479 and HKI 0480 are EF126967, EF126968 and EF126969, respectively.

Cellular fatty acid compositions of strains HKI 0478^T, HKI 0479, HKI 0480 and type strains of closely related Kribbella species are presented in a supplementary table available with the online version of this paper.

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