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Bacillus marmarensis sp. nov., an alkaliphilic, protease-producing bacterium isolated from mushroom compost

¹ TUBTAK-Marmara Research Center, Genetic Engineering and Biotechnology Institute;
² Kocaeli University, Faculty of Arts and Sciences, Department of Chemistry,Section of Biochemistry

³ E-mail: akin.denizci{at}mam.gov.tr

A Gram-positive, obligate alkaliphilic bacterium designated strain GMBE 72^T was isolated from mushroom compost from Yalova located in Marmara region of Turkey. Cells were aerobic, straight rods and they formed a subterminal to terminal, ellipsoidal endospore. The isolate was catalase-positive, oxidase-negative, motile and contain a peptidoglycan of type A1 based on meso-diaminopimelic acid. The strain grew at pH 8.0-12.5. The major cellular fatty acid was anteiso-C_15:0. The genomic DNA G+C content was 40.2 mol %. Phylogenetic analyses based on 16S rRNA gene sequences showed that the strain GMBE 72^T belonged to the genus Bacillus and exhibited 98.2 % levels of sequence similarity to known Bacillus pseudofirmus DSM 8715^T. Reassociation of DNA content was 56 % between GMBE 72^T and Bacillus pseudofirmus DSM 8715^T. According to the polyphasic characterization, the strain GMBE 72^T represents a novel species of the genus Bacillus, for which the name Bacillus marmarensis sp. nov. is proposed. The type strain is GMBE 72^T (=DSM 21297^T, =JCM 15719^T)