Journal of Microbiology

Journal Article

A rapid and simple method for identifying bacterial polar lipid components in wet biomass: Tuan Manh Nguyen , Jaisoo Kim; J. Microbiol. 2017;55(8):635-639. Published online July 4, 2017; DOI: https://doi.org/10.1007/s12275-017-7092-1

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There are marked differences between wet and freeze-dried cells with regard to the identification of polar lipid components. The determination of the polar lipid composition of freeze-dried cells is well established. However, several approaches to identifying polar lipid components in wet cells have met with limited success owing to the presence of non-polar compounds in the extracts, resulting in a lipid composition with a narrow scope. In this study, we surveyed the lipid profiles of the wet biomasses of three Gram-positive (Microbacterium lacticum, Rhodococcus koreensis, and Streptomyces longwoodensis) and two Gram-negative (Pseudomonas aeruginosa and Novosphingobium capsulatum) bacteria; the results were comparable in quality to those obtained using a standard freeze-dried approach. Moreover, our improved method ensures simple lipid extraction. Overall, the results of the analysis showed minor lipid profile differences between the two approaches with regard to quantity, and lipid identification was consistent in both methods for all species.

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Bacillus cheonanensis sp. nov. Isolated from Near Poultry Farm Soil: Hyun-Ju Kim , Cheol-Su Park , Siwon Lee , Tae-Young Ahn; J. Microbiol. 2014;52(7):554-558. Published online May 30, 2014; DOI: https://doi.org/10.1007/s12275-014-3458-9

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Abstract

A novel bacterial strain, designated PFS-5T, was isolated from the soil environment with feces of a live poultry farm located in Cheonan, Republic of Korea. Strain PFS-5T was Gram-staining-positive, motile, strictly aerobic bacterium, rod-shaped, and endospore-forming. The strain contained meso-diaminopimelic acid in their peptidoglycan and MK-7 menaquinone. The major fatty acids were anteiso-C15:0 (44.2%), C16:0 (22.2%), and iso-C15:0 (16.7%). The DNA G+C content was 40.1 mol%. Comparative 16S rRNA gene sequence analysis identified strain PFS-5T in the genus Bacillus, exhibiting the highest level of sequence similarity with type strain of B. herbersteinensis D-1,5aT (96.9%), B. humi LMG 22167T (96.7%), B. alkalitelluris BA288T (96.1%), B. litoralis SW-211T (96.0%), and B. luteolus YIM93174T (95.5%). The major polar lipids of PFS-5T were diphosphatidylglycerol and phosphatidylglycerol. On the basis of result from poly-phasic data, strain PFS-5T represents a novel species, for which the name Bacillus cheonanensis sp. nov. is proposed (Type strain PFS-5T= KACC 17469T= JCM19333T).

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Bacillus coreaensis sp. nov.: a xylan-hydrolyzing bacterium isolated from the soil of Jeju Island, Republic of Korea
Won-Jae Chi, Young Sang Youn, Jae-Seon Park, Soon-Kwang Hong
Journal of Microbiology.2015; 53(7): 448. CrossRef

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