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Pontibacter ummariensis sp. nov., isolated from a hexachlorocyclohexane-contaminated soil



Pontibacter ummariensis sp. nov., isolated from a hexachlorocyclohexane-contaminated soil



International Journal of Systematic and Evolutionary Microbiology 66(2): 1080-1087



A Gram-stain-negative, pinkish-red, rod-shaped bacterium designated strain NKM1T was isolated from soil samples contaminated with hexachlorocyclohexane isomers, collected from Ummari village, Lucknow, Uttar Pradesh, India. The strain was characterized by a polyphasic taxonomic approach. 16S rRNA gene sequence analysis showed that strain NKM1T clustered exclusively with members of the genus Pontibacter of the family Cytophagaceae, phylum Bacteroidetes. The 16S rRNA gene sequence similarity to type strains of the genus Pontibacter ranged from 96.7 to 93.8 %, with the highest sequence similarity found with Pontibacter odishensis JC130T (96.7 %). Cells of strain NKM1T were aerobic, non-flagellated and non-motile. Strain NKM1T was catalase- and oxidase-positive but negative for nitrate reduction and hydrolysis of gelatin. The major fatty acids in strain NKM1T were anteiso-C15 : 0, iso-C15 : 0, C16 : 0, C18 : 1ω9c and summed feature 3 (C16 : 1ω7c and/or C16 : 1ω6c). The polar lipid profile of strain NKM1T showed the presence of phosphatidylethanolamine and unknown glycolipids as well as aminolipids. sym-Homospermidine was found to be the major polyamine and menaquinone 7 (MK-7) was the major respiratory quinone. The DNA G+C content of strain NKM1T was determined to be 58.6 mol%. Based on phenotypic, chemotaxonomic, physiological and biochemical evidence, it is proposed that isolate NKM1T represents a novel species that belongs to the genus Pontibacter, for which the name Pontibacter ummariensis sp. nov. is proposed. The type strain is NKM1T ( = DSM 100161T = KCTC 42944T = MCC 2777T).

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Accession: 058573186

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PMID: 26652923


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