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Int J Syst Evol Microbiol 59 (2009), 1011-1015; DOI  10.1099/ijs.0.005777-0
© 2009 International Union of Microbiological Societies

Gordonia cholesterolivorans sp. nov., a cholesterol-degrading actinomycete isolated from sewage sludge

Oliver Drzyzga, J. María Navarro Llorens, Laura Fernández de las Heras, Esther García Fernández and Julián Perera

Departamento de Bioquímica y Biología Molecular I, Universidad Complutense de Madrid, 28040 Madrid, Spain

Correspondence
Oliver Drzyzga
drzyzga{at}bio.ucm.es

The taxonomic position of the cholesterol-degrading strain Chol-3T, isolated from a sewage sludge sample, was clarified using a polyphasic taxonomic approach. Phylogenetic analysis of its 16S rRNA gene sequence, whole-cell fatty acid profile and mycolic acid composition revealed that this isolate is a member of the genus Gordonia with the species Gordonia sihwensis, G. hydrophobica and G. shandongensis being the nearest phylogenetic neighbours. The results of DNA–DNA hybridization against its phylogenetically closest neighbours as well as the results of physiological and biochemical tests allowed genotypic and phenotypic differentiation of strain Chol-3T from the other Gordonia species with validly published names. Strain Chol-3T therefore merits recognition as a member of a novel species within the genus Gordonia, for which the name Gordonia cholesterolivorans sp. nov. is proposed. The type strain is Chol-3T (=CECT 7408T =DSM 45229T).

The GenBank/EMBL/DDBJ accession number for the 16S rRNA gene sequence of strain Chol-3T is EU244645.

Mycolic acid and cellular fatty acid profiles of strain Chol-3T and related type strains of the genus Gordonia and RiboPrint data are available as supplementary materials with the online version of this paper.






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