Subzero, saline incubations of Colwellia psychrerythraea reveal strategies and biomarkers for sustained life in extreme icy environments
Colwellia psychrerythraea is a marine psychrophilic bacterium known for its remarkable ability to maintain activity during long-term exposure to extreme subzero temperatures and correspondingly high salinities in sea ice. These microorganisms must have adaptations to both high salinity and low tempe...
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ftpubmed:oai:pubmedcentral.nih.gov:8475265 2023-05-15T18:18:30+02:00 Subzero, saline incubations of Colwellia psychrerythraea reveal strategies and biomarkers for sustained life in extreme icy environments Mudge, Miranda C. Nunn, Brook L. Firth, Erin Ewert, Marcela Hales, Kianna Fondrie, William E. Noble, William S. Toner, Jonathan Light, Bonnie Junge, Karen A. 2021-04-12 http://www.ncbi.nlm.nih.gov/pmc/articles/PMC8475265/ http://www.ncbi.nlm.nih.gov/pubmed/33760340 https://doi.org/10.1111/1462-2920.15485 en eng http://www.ncbi.nlm.nih.gov/pmc/articles/PMC8475265/ http://www.ncbi.nlm.nih.gov/pubmed/33760340 http://dx.doi.org/10.1111/1462-2920.15485 Environ Microbiol Article Text 2021 ftpubmed https://doi.org/10.1111/1462-2920.15485 2021-10-03T01:19:35Z Colwellia psychrerythraea is a marine psychrophilic bacterium known for its remarkable ability to maintain activity during long-term exposure to extreme subzero temperatures and correspondingly high salinities in sea ice. These microorganisms must have adaptations to both high salinity and low temperature to survive, be metabolically active, or grow in the ice. Here, we report on an experimental design that allowed us to monitor culturability, cell abundance, activity and proteomic signatures of C. psychrerythraea strain 34H (Cp34H) in subzero brines and supercooled sea water through long-term incubations under eight conditions with varying subzero temperatures, salinities and nutrient additions. Shotgun proteomics found novel metabolic strategies used to maintain culturability in response to each independent experimental variable, particularly in pathways regulating carbon, nitrogen and fatty acid metabolism. Statistical analysis of abundances of proteins uniquely identified in isolated conditions provide metabolism-specific protein biosignatures indicative of growth or survival in either increased salinity, decreased temperature, or nutrient limitation. Additionally, to aid in the search for extant life on other icy worlds, analysis of detected short peptides in −10°C incubations after 4 months identified over 500 potential biosignatures that could indicate the presence of terrestrial-like cold-active or halophilic metabolisms on other icy worlds. Text Sea ice PubMed Central (PMC) Environmental Microbiology 23 7 3840 3866 |
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Article Mudge, Miranda C. Nunn, Brook L. Firth, Erin Ewert, Marcela Hales, Kianna Fondrie, William E. Noble, William S. Toner, Jonathan Light, Bonnie Junge, Karen A. Subzero, saline incubations of Colwellia psychrerythraea reveal strategies and biomarkers for sustained life in extreme icy environments |
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Colwellia psychrerythraea is a marine psychrophilic bacterium known for its remarkable ability to maintain activity during long-term exposure to extreme subzero temperatures and correspondingly high salinities in sea ice. These microorganisms must have adaptations to both high salinity and low temperature to survive, be metabolically active, or grow in the ice. Here, we report on an experimental design that allowed us to monitor culturability, cell abundance, activity and proteomic signatures of C. psychrerythraea strain 34H (Cp34H) in subzero brines and supercooled sea water through long-term incubations under eight conditions with varying subzero temperatures, salinities and nutrient additions. Shotgun proteomics found novel metabolic strategies used to maintain culturability in response to each independent experimental variable, particularly in pathways regulating carbon, nitrogen and fatty acid metabolism. Statistical analysis of abundances of proteins uniquely identified in isolated conditions provide metabolism-specific protein biosignatures indicative of growth or survival in either increased salinity, decreased temperature, or nutrient limitation. Additionally, to aid in the search for extant life on other icy worlds, analysis of detected short peptides in −10°C incubations after 4 months identified over 500 potential biosignatures that could indicate the presence of terrestrial-like cold-active or halophilic metabolisms on other icy worlds. |
format |
Text |
author |
Mudge, Miranda C. Nunn, Brook L. Firth, Erin Ewert, Marcela Hales, Kianna Fondrie, William E. Noble, William S. Toner, Jonathan Light, Bonnie Junge, Karen A. |
author_facet |
Mudge, Miranda C. Nunn, Brook L. Firth, Erin Ewert, Marcela Hales, Kianna Fondrie, William E. Noble, William S. Toner, Jonathan Light, Bonnie Junge, Karen A. |
author_sort |
Mudge, Miranda C. |
title |
Subzero, saline incubations of Colwellia psychrerythraea reveal strategies and biomarkers for sustained life in extreme icy environments |
title_short |
Subzero, saline incubations of Colwellia psychrerythraea reveal strategies and biomarkers for sustained life in extreme icy environments |
title_full |
Subzero, saline incubations of Colwellia psychrerythraea reveal strategies and biomarkers for sustained life in extreme icy environments |
title_fullStr |
Subzero, saline incubations of Colwellia psychrerythraea reveal strategies and biomarkers for sustained life in extreme icy environments |
title_full_unstemmed |
Subzero, saline incubations of Colwellia psychrerythraea reveal strategies and biomarkers for sustained life in extreme icy environments |
title_sort |
subzero, saline incubations of colwellia psychrerythraea reveal strategies and biomarkers for sustained life in extreme icy environments |
publishDate |
2021 |
url |
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC8475265/ http://www.ncbi.nlm.nih.gov/pubmed/33760340 https://doi.org/10.1111/1462-2920.15485 |
genre |
Sea ice |
genre_facet |
Sea ice |
op_source |
Environ Microbiol |
op_relation |
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC8475265/ http://www.ncbi.nlm.nih.gov/pubmed/33760340 http://dx.doi.org/10.1111/1462-2920.15485 |
op_doi |
https://doi.org/10.1111/1462-2920.15485 |
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Environmental Microbiology |
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23 |
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7 |
container_start_page |
3840 |
op_container_end_page |
3866 |
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1766195102035738624 |