Abstract
The ability of cold-adapted bacteria to survive in extreme cold and diverse temperatures is due to their unique attributes like cell membrane stability, up-regulation of peptidoglycan biosynthesis, increased production of extracellular polymeric substances, and expansion of membrane pigment. Various cold-adapted proteins, including ice-nucleating proteins (INPs), antifreeze proteins (AFPs), cold shock proteins (Csps), and cold-acclimated proteins (CAPs), help the bacteria to survive in these environments. To sustain cells from extreme cold conditions and maintain stability in temperature fluctuations, survival strategies at the molecular level and their mechanism play significant roles in adaptations in cryospheric conditions. Furthermore, cold shock domains present in the multifunctional cold shock proteins play crucial roles in their adaptation strategies. The considerable contribution of lipopeptides, osmolytes, and membrane pigments plays an integral part in their survival in extreme environments. This review summarizes the evolutionary history of cold-adapted bacteria and their molecular and cellular adaptation strategies to thrive in harsh cold environments. It also discusses the importance of carotenoids produced, lipid composition, cryoprotectants, proteins, and chaperones related to this adaptation. Furthermore, the functions and mechanisms of adaptations within the cell are discussed briefly. One can utilize and explore their potential in various biotechnology applications and their evolutionary journey by knowing the inherent mechanism of their molecular and cellular adaptation to cold climatic conditions. This review will help all branches of the life science community understand the basic microbiology of psychrophiles and their hidden prospect in life science research.
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Data availability
The data in this study are available upon reasonable request to the corresponding author.
Abbreviations
- ROS:
-
Reactive oxygen species
- AFPs:
-
Antifreeze proteins
- CAPs:
-
Cold-adapted proteins
- Csps:
-
Cold shock proteins
- INPs:
-
Ice-nucleating proteins
- EPS:
-
Exopolysaccharides
- LC-PUFAs:
-
Long-chain polyunsaturated fatty acids
- EPA:
-
Eicosapentaenoic acid
- DHA:
-
Docosahexaenoic acid
- LPS:
-
Lipopolysaccharides
- UV:
-
Ultraviolet
- DNA:
-
Deoxyribonucleic acid
- RNA:
-
Ribonucleic acid
- HSPs:
-
Heat shock proteins
- CSD:
-
Cold shock domains
- UTR:
-
Untranslated regions
- HHP:
-
High hydrostatic pressure
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Acknowledgements
PC gratefully acknowledges the Central University of Himachal Pradesh for providing the fellowship and laboratory facilities. SB gratefully acknowledged the University Grants Commission, India, for the Fellowships; however, the funding body was not involved in the study. We also thank the anonymous reviewers for their valuable suggestions which significantly improved the manuscript.
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Priyanka Choudhary: Writing—review & editing, Data curation. Sunidhi Bhatt: Writing—review & editing, Data curation. Subhankar Chatterjee: Conceptualization, Writing—review & editing and overall supervision of the work.
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Choudhary, P., Bhatt, S. & Chatterjee, S. From freezing to functioning: cellular strategies of cold-adapted bacteria for surviving in extreme environments. Arch Microbiol 206, 329 (2024). https://doi.org/10.1007/s00203-024-04058-5
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DOI: https://doi.org/10.1007/s00203-024-04058-5