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Abstract
Strain RuGl7T was isolated from a soil sample collected at the periphery of the glacial Lake Roopkund in the Himalayan mountain range, India. Cells of RuGl7T were Gram-positive, aerobic, rod-shaped, motile and grew optimally between 15 and 18 °C. Cells of RuGl7T contained 2,4-diaminobutyric acid in the cell-wall peptidoglycan and the major menaquinones were MK-10, MK-11 and MK-12. The polar lipids present were diphosphatidylglycerol and phosphatidylglycerol and an unknown lipid and the major fatty acid was anteiso-C15 : 0. Based on the above characteristics, strain RuGl7T was assigned to the genus Cryobacterium. Strain RuGl7T shared a 16S rRNA gene sequence similarity of 97.0 and 99.0 % with Cryobacterium psychrotolerans JCM 13925T and Cryobacterium psychrophilum JCM 1463T, respectively. However, DNA–DNA relatedness values between strain RuGl7T and C. psychrotolerans and C. psychrophilum were 28 and 23 %, respectively. Furthermore, strain RuGl7T exhibited several phenotypic and genotypic differences when compared with C. psychrotolerans, C. psychrophilum and Cryobacterium mesophilum. Based on these differentiating characteristics, strain RuGl7T was identified as a novel species of the genus Cryobacterium for which the name Cryobacterium roopkundense sp. nov. is proposed. The type strain is RuGl7T (=DSM 21065T=JCM 15131T).
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