Lookup NU author(s): Geok Yuan Annie Tan,
Emeritus Professor Michael Goodfellow
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The taxonomic status of two actinomycetes isolated from the wall of a hypogean Roman catacomb was established based on a polyphasic investigation. The organisms were found to have chemical and morphological markers typical of members of the genus Amycolatopsis. They also shared a range of chemical, molecular and phenotypic markers which served to separate them from representatives of recognized Amycolatopsis species. The new isolates formed a branch in the Amycolatopsis 16S rRNA gene sequence tree with Amycolatopsis minnesotensis NRRL B-24435T, but this association was not supported by a particularly high bootstrap value or by the product of the maximum-parsimony tree-making algorithm. The organisms were distinguished readily from closely related Amycolatopsis species based on a combination of phenotypic properties and from all Amycolatopsis strains by their characteristic menaquinone profiles, in which tetra-hydrogenated menaquinones with 11 isoprene units predominated. The combined genotypic and phenotypic data indicate that the isolates merit recognition as representing a novel species of the genus Amycolatopsis. The name proposed for this novel species is Amycolatopsis nigrescens sp. nov., with type strain CSC17Ta-90T (= HKI 0330T = DSM 44992T = NRRL B-24473T). © 2007 IUMS.
Author(s): Groth I, Tan GYA, Gonzalez JM, Laiz L, Carlsohn MR, Schutze B, Wink J, Goodfellow M
Publication type: Article
Publication status: Published
Journal: International Journal of Systematic and Evolutionary Microbiology
Print publication date: 01/03/2007
ISSN (print): 1466-5026
ISSN (electronic): 1070-6259
Publisher: Society for General Microbiology
PubMed id: 17329776
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