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Int J Syst Evol Microbiol. 2013 Sep;63(Pt 9):3330-5. doi: 10.1099/ijs.0.048090-0. Epub 2013 Mar 15.

Paenibacillus thermoaerophilus sp. nov., a moderately thermophilic bacterium isolated from compost.

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Department of Environmental Engineering for Symbiosis, Faculty of Engineering, Soka University, 1-236 Tangi-machi, Hachioji, Tokyo 192-8577, Japan.


A rod-shaped, endospore-forming, Gram-reaction-positive bacterium, designated strain TC22-2b(T), was isolated from compost in Tochigi, Japan. Phylogenetic analysis based on 16S rRNA gene sequences showed that the strain belonged to a cluster comprising species of the genus Paenibacillus and was most closely related to the type strain of Paenibacillus elgii (93.4% similarity). The major cellular fatty acids were C(16:0) (25.5%), iso-C(16:0) (23.6%) and anteiso-C(15:0) (21.5%). The predominant menaquinone was MK-7. The major polar lipids were diphosphatidylglycerol, phosphatidylglycerol and phosphatidylethanolamine. The diamino acid found in the cell wall peptidoglycan was meso-diaminopimelic acid, and the DNA G+C content was 59.1 mol%. The results of physiological and biochemical tests enabled the phenotypic differentiation of strain TC22-2b(T) from the most closely related species with validly published names. Phylogenetic and phenotypic evidence reveals that strain TC22-2b(T) represents a novel species of the genus Paenibacillus, for which the name Paenibacillus thermoaerophilus sp. nov. is proposed. The type strain of the novel species is TC22-2b(T) ( =DSM 26310(T)  =JCM 18657(T)).

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