- Environmental Adaptation of Psychrophilic Bacteria Subtercola spp. Isolated from Various Cryospheric Habitats
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Hanbyul Lee , Yong-Joon Cho , Ahnna Cho , Ok-Sun Kim
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J. Microbiol. 2023;61(7):663-672. Published online August 24, 2023
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DOI: https://doi.org/10.1007/s12275-023-00068-y
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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.
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Citations
Citations to this article as recorded by  - Assessment of pathogenic traits in selected bacteria isolated from snowy environments in France and Greenland
Masoumeh Kashiri, Athanasios Zervas, Florian H. H. Brill, Jörg Steinmann, Bernd Neumann, Diana C. Mogrovejo, Alexandre M. Anesio
Extremophiles.2026;[Epub] CrossRef
- Glaciers as microbial habitats: current knowledge and implication
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Soyeon Kim , Hanbyul Lee , Soon-Do Hur , Woo Jun Sul , Ok-Sun Kim
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J. Microbiol. 2022;60(8):767-779. Published online July 29, 2022
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DOI: https://doi.org/10.1007/s12275-022-2275-9
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Abstract
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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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Citations
Citations to this article as recorded by - 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
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Minkyung Kim, Hanbyul Lee, Subin Lee, Yeongcheol Han, Ok-Sun Kim
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