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Abstract

A yellow-pigmented, hexachlorocyclohexane (HCH)-degrading bacterium, strain IP26, was isolated from an HCH dumpsite and subjected to a polyphasic analysis in order to determine its taxonomic position. Strain IP26 showed maximum 16S rRNA gene sequence similarity with Sp+ (98.5 %), UT26 (98.4 %) and B90A (98.2 %). Phylogenetic analysis based on 16S rRNA gene sequences also showed that strain IP26 formed a cluster with these three HCH-degrading strains. Chemotaxonomic data (major polyamine, spermidine; major quinone, ubiquinone with ten isoprene units; major polar lipids, phosphatidylmonomethylethanolamine, phosphatidylethanolamine, diphosphatidylglycerol, phosphotidylcholine; and presence of 2-hydroxy fatty acid) supported inclusion of strain IP26 in the genus . However, the results of DNA–DNA hybridization and morphological and biochemical tests clearly allowed phenotypic and genotypic differentiation of strain IP26 from recognized species of the genus Strain IP26 thus represents a novel species of the genus for which the name sp. nov. is proposed. The type strain is IP26 (=MTCC8598 =CCM 7432).

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2009-12-01
2019-09-22
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vol. , part 12, pp. 3140 - 3144

Supplementary data [ PDF] (265KB), containing:

Graphs showing degradation of α-, β-, γ- and δ-HCH (5 µg ml ) by strain IP26 .

Southern blot hybridization of I-digested genomic DNA of strain IP26 with [α- P]dATP-labelled probe of .

Southern blot hybridization of HI-digested genomic DNA of strain IP26 with [α- P]dATP-labelled probe of IS .

Polar lipid profile of IP26 after two-dimensional thin layer chromatography and detection with primulin.

Cellular fatty acid profiles of species of the genus used in the study.

DNA–DNA hybridization of strain IP26 with phylogenetically close members of the genus .



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