Journal of Microbiology

Ok-Sun Kim

6 Articles

Environmental Adaptation of Psychrophilic Bacteria Subtercola spp. Isolated from Various Cryospheric Habitats: Hanbyul Lee , Yong-Joon Cho , Ahnna Cho , Ok-Sun Kim; J. Microbiol. 2023;61(7):663-672. Published online August 24, 2023; DOI: https://doi.org/10.1007/s12275-023-00068-y

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Abstract PDF: Subtercola boreus K300T is a novel psychrophilic strain that was isolated from permanently cold groundwater in Finland and has also been found in several places in Antarctica including lake, soil, and rocks. We performed genomic and transcriptomic analyses of 5 strains from Antarctica and a type strain to understand their adaptation to different environments. Interestingly, the isolates from rocks showed a low growth rate and smaller genome size than strains from the other isolation sources (lake, soil, and groundwater). Based on these habitat-dependent characteristics, the strains could be classified into two ecotypes, which showed differences in energy production, signal transduction, and transcription in the clusters of orthologous groups of proteins (COGs) functional category. In addition, expression pattern changes revealed differences in metabolic processes, including uric acid metabolism, DNA repair, major facilitator superfamily (MFS) transporters, and xylose degradation, depending on the nutritional status of their habitats. These findings provide crucial insights into the environmental adaptation of bacteria, highlighting genetic diversity and regulatory mechanisms that enable them to thrive in the cryosphere.

Glaciers as microbial habitats: current knowledge and implication: Soyeon Kim , Hanbyul Lee , Soon-Do Hur , Woo Jun Sul , Ok-Sun Kim; J. Microbiol. 2022;60(8):767-779. Published online July 29, 2022; DOI: https://doi.org/10.1007/s12275-022-2275-9

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Glaciers, formed from the gradual accumulation of snow, can be continuous records representing past environments and recognized as a time capsule of our planetary evolution. Due to extremely harsh conditions, glacial ice has long been considered an uninhabitable ecosystem for microorganisms to sustain their life. However, recent developments in microbiological analysis techniques revealed the presence of unexpectedly diverse microbial strains. Glacial microorganisms could also provide valuable information, including not only biological diversity and structure but also molecular systematics, metabolic profiles, and evolutionary changes from the past climate and ecosystem. However, there are several obstacles in investigating the glacier environment, such as low regional accessibility, technical difficulties of ice coring, potential contamination during the sampling process, and low microbial biomass. This review aims to summarize recent knowledge on decontamination methods, biomass, diversity based on culture-dependent and -independent methods, application of biological proxies, greenhouse gas production and adaptive strategies in glaciers from various regions and to imply further directions for a comprehensive understanding of habitatility in an icy world including outer of our planet.

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Enhancing Bacterial Phenotype Classification Through the Integration of Autogating and Automated Machine Learning in Flow Cytometric Analysis
In Jae Jeong, Jin‐Kyung Hong, Young Jun Bae, Tea Kwon Lee
Cytometry Part A.2025; 107(3): 203. CrossRef
Millennial-scale depth-resolved ancient microbial diversity and pathogenic potential in Styx Glacier, Antarctica
Minkyung Kim, Hanbyul Lee, Subin Lee, Yeongcheol Han, Ok-Sun Kim
Environmental Research.2025; 285: 122421. CrossRef
Host–virome associations in the weathering crust of a rapidly retreating temperate Alpine glacier
Gilda Varliero, Andreas Bauder, Beat Stierli, Weihong Qi, Beat Frey
Microbial Genomics .2025;[Epub] CrossRef
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Pablo Villarreal, Jennifer Molinet, Stephanie Braun-Galleani, Francisco A. Cubillos
Annual Review of Microbiology .2025; 79(1): 595. CrossRef
Research progress and application of bacterial traceability technology
Wei Wang, Bichun Zhao, Hanyu Zhang, Zhaowei Jie, Can Hu, Hongling Guo, Ping Wang, Yajun Li, Jun Zhu, Hongcheng Mei, Jian Ye
Forensic Science International.2024; 365: 112275. CrossRef
Bacterial community structure, adaptations and prevalence of antimicrobial resistance in bacteria from Antarctica: A review
Sonia Tamang, Prayatna Sharma, Santosh Kumar, Nagendra Thakur
Polar Science.2024; 40: 101034. CrossRef
Marine Science Can Contribute to the Search for Extra-Terrestrial Life
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Genomic basis of environmental adaptation in the widespread poly-extremophilic Exiguobacterium group
Liang Shen, Yongqin Liu, Liangzhong Chen, Tingting Lei, Ping Ren, Mukan Ji, Weizhi Song, Hao Lin, Wei Su, Sheng Wang, Marianne Rooman, Fabrizio Pucci
The ISME Journal.2024;[Epub] CrossRef
Genomics-based identification of a cold adapted clade in Deinococcus
Liang Shen, Jiayu Hu, Luyao Zhang, Zirui Wu, Liangzhong Chen, Namita Paudel Adhikari, Mukan Ji, Shaoxing Chen, Fang Peng, Yongqin Liu
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Genomic analyses reveal a low-temperature adapted clade in Halorubrum, a widespread haloarchaeon across global hypersaline environments
Liangzhong Chen, Tao Hong, Zirui Wu, Weizhi Song, Shaoxing X. Chen, Yongqin Liu, Liang Shen
BMC Genomics.2023;[Epub] CrossRef
Insights into abundance, adaptation and activity of prokaryotes in arctic and Antarctic environments
Sif Marie Holmberg, Niels O. G. Jørgensen
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Exploring microbial diversity in Greenland Ice Sheet supraglacial habitats through culturing-dependent and -independent approaches
Ate H Jaarsma, Katie Sipes, Athanasios Zervas, Francisco Campuzano Jiménez, Lea Ellegaard-Jensen, Mariane S Thøgersen, Peter Stougaard, Liane G Benning, Martyn Tranter, Alexandre M Anesio
FEMS Microbiology Ecology.2023;[Epub] CrossRef
Snow Surface Microbial Diversity at the Detection Limit within the Vicinity of the Concordia Station, Antarctica
Alessandro Napoli, Claudia Coleine, Nikea Ulrich, Ralf Moeller, Daniela Billi, Laura Selbmann
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Bacterial Diversity in Ornithogenic Soils Compared to Mineral Soils on King George Island, Antarctica: Ok-Sun Kim , Namyi Chae , Hyun Soo Lim , Ahnna Cho , Jeong Hoon Kim , Soon Gyu Hong , Jeongsu Oh; J. Microbiol. 2012;50(6):1081-1085. Published online December 30, 2012; DOI: https://doi.org/10.1007/s12275-012-2655-7

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Abstract PDF

In the Narębski Point area of King George Island of Antarctica, ornithogenic soils form on land under Chinstrap and Gentoo Penguin rookeries. The purpose of this study was to compare the bacterial community compositions in the gradient of contamination by penguin feces; mineral soil with no contamination, and soils with medium or high contamination. The discrimination between mineral soils and ornithogenic soils by characterization of physicochemical properties and bacterial communities was notable. Physicochemical analyses of soil properties showed enrichment of carbon and nitrogen in ornithogenic soils. Firmicutes were present abundantly in active ornithogenic soils, Bacteroidetes and Proteobacteria in a formerly active one, and several diverse phyla such as Proteobacteria, Actinobacteria, and Acidobacteria in mineral soils. Some predominant species belonging to the Firmicutes and Gammaproteobacteria may play an important role for the mineralization of nutrients in ornithogenic soils. Results of this study indicate that dominant species may play an important role in mineralization of nutrients in these ecosystems.

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Environmental Adaptation of Psychrophilic Bacteria Subtercola spp. Isolated from Various Cryospheric Habitats
Hanbyul Lee, Yong-Joon Cho, Ahnna Cho, Ok-Sun Kim
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Local-scale variation of soil bacterial communities in ice-free regions of maritime Antarctica
Mincheol Kim, Hyun-Soo Lim, Chang-Uk Hyun, Ahnna Cho, Hyun-Ju Noh, Soon Gyu Hong, Ok-Sun Kim
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Links between bacteria derived from penguin guts and deposited guano and the surrounding soil microbiota
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Pyrosequencing-based analysis of fecal microbial communities in three purebred pig lines
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Comparative Approach to Capture Bacterial Diversity of Coastal Waters: Hyunsoo Na , Ok-Sun Kim , Seok-Hwan Yoon , Yunmin Kim , Jongsik Chun; J. Microbiol. 2011;49(5):729-740. Published online November 9, 2011; DOI: https://doi.org/10.1007/s12275-011-1205-z

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Abstract PDF

Despite the revolutionary advancements in DNA sequencing technology and cultivation techniques, few studies have been done to directly compare these methods. In this study, a 16S rRNA gene-based, integrative approach combining culture-independent techniques with culture-dependent methods was taken to investigate the bacterial community structure of coastal seawater collected from the Yellow Sea, Korea. For culture-independent studies, we used the latest model pyrosequencer, Roche/454 Genome Sequencer FLX Titanium. Pyrosequencing captured a total of 52 phyla including 27 candidate divisions from the water column, whereas the traditional cloning approach captured only 15 phyla including 2 candidate divisions. In addition, of 878 genera retrieved, 92.1% of the sequences were unique to pyrosequencing. For culture-dependent analysis, plate culturing, plate washing, enrichment, and high-throughput culturing (HTC) methods were applied. Phylogenetic analysis showed that the plate-washing clones formed a cluster devoid of any previously cultured representatives within the family Rhodobacteraceae. One HTC isolate (SF293) fell into the OM182 clade, which was not recovered by other culturing methods described here. By directly comparing the sequences obtained from cultures with those from culture-independent work, we found that only 33% of the culture sequences were identical to those from clone libraries and pyrosequences. This study presents a detailed comparison of common molecular and cultivation techniques available in microbial ecology. As different methods yielded different coverage, we suggest choosing the approach after carefully examining the scientific questions being asked.

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Insights into Bacterial Community Structure and Metabolic Diversity of Mercury-Contaminated Sediments from Hyeongsan River, Pohang, South Korea
Dhiraj Kumar Chaudhary, Kyung Hee Kim, Mikyung Lee, Hwansuk Kim, Yongseok Hong
Current Microbiology.2022;[Epub] CrossRef
Microbial community niches on microplastics and prioritized environmental factors under various urban riverine conditions
Hien Thi Nguyen, Woodan Choi, Eun-Ju Kim, Kyungjin Cho
Science of The Total Environment.2022; 849: 157781. CrossRef
Abundance, community structure and diversity of nitrifying bacterial enrichments from low and high saline brackishwater environments
P.K. Patil, V. Baskaran, T.‐N. Vinay, S. Avunje, M. Leo‐Antony, M.S. Shekhar, S.V. Alavandi, K.K. Vijayan
Letters in Applied Microbiology.2021; 73(1): 96. CrossRef
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Fei Sjöberg, Intawat Nookaew, Shora Yazdanshenas, Monica Gio-Batta, Ingegerd Adlerberth, Agnes E. Wold
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Genomic profiling of four cultivated Candidatus Nitrotoga spp. predicts broad metabolic potential and environmental distribution
Andrew M Boddicker, Annika C Mosier
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Enrichment and Physiological Characterization of a Cold-Adapted Nitrite-Oxidizing Nitrotoga sp. from an Eelgrass Sediment
Kento Ishii, Hirotsugu Fujitani, Kentaro Soh, Tatsunori Nakagawa, Reiji Takahashi, Satoshi Tsuneda, Volker Müller
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Pseudomaricurvus alcaniphilus sp. nov., a marine bacterium isolated from tidal flat sediment and emended descriptions of the genus Pseudomaricurvus, Pseudomaricurvus alkylphenolicus Iwaki et al. 2014 and Maricurvus nonylphenolicus Iwaki et al. 2012
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Pyrosequencing-based analysis of fecal microbial communities in three purebred pig lines
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Bacteriolytic Bacillus species isolated from brackish waters of the Southern Baltic Sea
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Journal of Life Science.2013; 23(6): 770. CrossRef
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Endophytic bacterial diversity of an Antarctic moss, Sanionia uncinata
Mira Park, Hyoungseok Lee, Soon Gyu Hong, Ok-Sun Kim
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Microbial communities in low permeability, high pH uranium mine tailings: characterization and potential effects
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Bacterial diversity in ornithogenic soils compared to mineral soils on King George Island, Antarctica
Ok-Sun Kim, Namyi Chae, Hyun Soo Lim, Ahnna Cho, Jeong Hoon Kim, Soon Gyu Hong, Jeongsu Oh
Journal of Microbiology.2012; 50(6): 1081. CrossRef

Monitoring of Soil Bacterial Community and Some Inoculated Bacteria After Prescribed Fire in Microcosm: Hong-Gyu Song , Ok-Sun Kim , Jae-Jun Yoo , Sun-Ok Jeon , Sun-Hee Hong , Dong-Hun Lee , Tae-Seok Ahn; J. Microbiol. 2004;42(4):285-291.; DOI: https://doi.org/2109 [pii]

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Abstract PDF: The soil bacterial community and some inoculated bacteria were monitored to assess the microbial responses to prescribed fire in their microcosm. An acridine orange direct count of the bacteria in the unburned control soil were maintained at a relatively stable level (2.0~2.7 x10^9 cells/g^-1 . soil) during the 180 day study period. The number of bacteria in the surface soil was decreased by fire, but was restored after 3 months. Inoculation of some bacteria increased the number of inoculated bacteria several times and these elevated levels lasted several months. The ratios of eubacteria detected by a fluorescent in situ hybridization (FISH) method to direct bacterial count were in the range of 60~80% during the study period, with the exception of some lower values at the beginning, but there were no definite differences between the burned and unburned soils or the inoculated and uninoculated soils. In the unburned control soil, the ratios of [alpha]-, [beta]- and [gamma]-subgroups of the proteobacteria, Cytophaga-Flavobacterium and other eubacteria groups to that of the entire eubacteria were 13.7, 31.7, 17.1, 16.8 and 20.8%, respectively, at time 0. The overall change on the patterns of the ratios of the 5 subgroups of eubacteria in the uninoculated burned and inoculated soils were similar to those of the unburned control soil, with the exception of some minor variations during the initial period. The proportions of each group of eubacteria became similar in the different microcosms after 6 months, which may indicate the recovery of the original soil microbial community structure after fire or the inoculation of some bacteria. The populations of Azotobacter vinelandii, Bacillus megaterium and Pseudomonas fluorescens, which had been inoculated to enhance the microbial activities, and monitored by FISH method, showed similar changes in the microcosms, and maintained high levels for several months.

Monitoring of Bacterial Community in a Coniferous Forest Soil After a Wildfire: Ok-Sun Kim , Jae-Jun Yoo , Dong-Hun Lee , Tae-Seok Ahn , Hong-Gyu Song; J. Microbiol. 2004;42(4):278-284.; DOI: https://doi.org/2110 [pii]

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Abstract PDF: Changes in the soil bacterial community of a coniferous forest were analyzed to assess microbial responses to wildfire. Soil samples were collected from three different depths in lightly and severely burned areas, as well as a nearby unburned control area. Direct bacterial counts ranged from 3.3-22.6 x10^8 cells/(g . soil). In surface soil, direct bacterial counts of unburned soil exhibited a great degree of fluctuation. Those in lightly burned soil changed less, but no significant variation was observed in the severely burned soil. The fluctuations of direct bacterial count were less in the middle and deep soil layers. The structure of the bacterial community was analyzed via the fluorescent in situ hybridization method. The number of bacteria detected with the eubacteria-targeted probe out of the direct bacterial count varied from 30.3 to 84.7%, and these ratios were generally higher in the burned soils than in the unburned control soils. In the surface unburned soil, the ratios of [alpha]-, [beta]- and [gamma]-proteobacteria, Cytophaga-Flavobacterium group, and other eubacteria groups to total eubacteria were 9.9, 10.6, 15.5, 9.0, and 55.0%, respectively, and these ratios were relatively stable. The ratios of [alpha]-, [beta]- and [gamma]-proteobacteria, and Cytophaga-Flavobacterium group to total eubacteria increased immediately after the wildfire, and the other eubacterial proportions decreased in the surface and middle layer soils. By way of contrast, the composition of the 5 groups of eubacteria in the subsurface soil exhibited no significant fluctuations during the entire period. The total bacterial population and bacterial community structure disturbed by wildfire soon began to recover, and original levels seemed to be restored 3 months after the wildfire.

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