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Murinocardiopsis flavida gen. nov., sp. nov., an actinomycete isolated from indoor walls

Kämpfer, Peter ; Schäfer, Jenny ; Lodders, Nadine ; Martin, Karin


Originalveröffentlichung: (2009) International journal of systematic and evolutionary microbiology, 2009, 60(8), 1729-1734. doi:10.1099/ijs.0.015990-0
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URN: urn:nbn:de:hebis:26-opus-86173
URL: http://geb.uni-giessen.de/geb/volltexte/2012/8617/

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Freie Schlagwörter (Englisch): Murinocardiopsis gen. nov. , Murinocardiopsis flavida sp. nov. , Actinomycetes
Universität Justus-Liebig-Universität Gießen
Institut: Institut für Angewandte Mikrobiologie
Fachgebiet: Agrarwissenschaften, Ökotrophologie und Umweltmanagement fachübergreifend
DDC-Sachgruppe: Biowissenschaften, Biologie
Dokumentart: Aufsatz
Sprache: Englisch
Erstellungsjahr: 2009
Publikationsdatum: 15.02.2012
Kurzfassung auf Englisch: Two Gram-stain-positive, mycelium-forming actinobacteria (strains 14-Be-013T and 02-Gi-014) were isolated from walls colonized with moulds and studied taxonomically. The isolates formed yellowish-pigmented substrate mycelium showing no fragmentation. Comparative analysis of 16S rRNA gene sequences showed that these bacteria are most closely related to genera within the family Nocardiopsaceae, but form a separate lineage within this family. Highest sequence similarities were to the type strains of Marinactinospora thermotolerans (96.0% to 14-Be-013T), Nocardiopsis dassonvillei subsp. albirubida and Nocardiopsis lucentensis (both 95.3% to 14-Be-013T). Whole-cell hydrolysates contained meso-diaminopimelic acid as the diagnostic diamino acid of the cell wall and no diagnostic sugars. Mycolic acids were absent. The major menaquinones were MK-10(H4), MK-11(H4) and MK-12(H2). The polar lipid profile consisted of phosphatidylcholine, diphosphatidylglycerol, phosphatidylglycerol, phosphatidylinositol and unknown lipids. Major fatty acids iso-C16:0, anteiso-C17:0 and C18:1?9c supported the affiliation of these isolates to the family Nocardiopsaceae. Phenotypic analysis (including chemotaxonomy) further differentiated strains 14-Be-013T and 02-Gi-014 from the most closely related members of the genera Marinactinospora and Nocardiopsis. Since the two strains form a distinct lineage in the 16S rRNA gene sequence-based phylogenetic tree, the novel genus Murinocardiopsis gen. nov. with the type species Murinocardiopsis flavida sp. nov. is proposed. The type strain of Murinocardiopsis flavida is 14-Be-013T (=DSM 45312T =CCM 7612T).
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