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Cerasibacillus quisquiliarum gen. nov., sp. nov., isolated from a semi-continuous decomposing system of kitchen refuse

¹ Department of Biotechnology, Graduate School of Agricultural and Life Sciences, The University of Tokyo, Yayoi 1-1-1, Bunkyo-ku, Tokyo 113-8657, Japan
² Laboratory of Bioresources, Institute of Molecular and Cellular Biosciences, The University of Tokyo, Yayoi 1-1-1, Bunkyo-ku, Tokyo 113-8657, Japan

Correspondence
Kohei Nakamura
k-nakamura{at}mbj.nifty.com

A moderately thermophilic and alkaliphilic bacillus, which had been reported and designated BLx (Haruta et al., 2002), was isolated from a semi-continuous decomposing system of kitchen refuse. Cells of strain BLx^T were strictly aerobic, rod-shaped, motile and spore forming. The optimum temperature and pH for growth were approximately 50 °C and pH 8–9. Strain BLx^T was able to grow at NaCl concentrations from 0·5 to 7·5 %, with optimum growth at 0·5 % NaCl. The predominant menaquinone was MK-7, and the major fatty acid was iso-C_{15 : 0}. Phylogenetic analysis showed that strain BLx^T was positioned in an independent lineage within the cluster that includes the genera Virgibacillus and Lentibacillus in Bacillus rRNA group 1. Strain BLx^T exhibited 16S rDNA similarity of 92·8–94·8 % to Virgibacillus species and 92·3 % to Lentibacillus salicampi. Phenotypic, chemotaxonomic and phylogenetic analyses supported the classification of strain BLx^T in a novel genus and species. Cerasibacillus quisquiliarum gen. nov., sp. nov. is proposed on the basis of phenotypic, chemotaxonomic and phylogenetic data. The type strain is BLx^T (DSM 15825^T=IAM15044^T=KCTC 3815^T).

The GenBank/EMBL/DDBJ accession number for the 16S rDNA sequence of strain BLx^T is AB107894.

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