Metagenomic Analysis of Antarctic Biocrusts Unveils a Rich Range of Cold-Shock Proteins

Microorganisms inhabiting Antarctic biocrusts develop several strategies to survive extreme environmental conditions such as severe cold and drought. However, the knowledge about adaptations of biocrusts microorganisms are limited. Here, we applied metagenomic sequencing to study biocrusts from east...

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Bibliographic Details
Published in:Microorganisms
Main Authors: Ekaterina Pushkareva, Josef Elster, Burkhard Becker
Format: Article in Journal/Newspaper
Language:English
Published: MDPI AG 2023
Subjects:
metagenomic sequencing
biocrusts
Antarctica
cold-shock proteins
antifreeze proteins
cold-shock domain
Biology (General)
QH301-705.5
Antarctic
East Antarctica
Antarc*
Online Access:https://doi.org/10.3390/microorganisms11081932
https://doaj.org/article/bee8d5dcf5994dce89db6c17b7446af4
Description
Summary:Microorganisms inhabiting Antarctic biocrusts develop several strategies to survive extreme environmental conditions such as severe cold and drought. However, the knowledge about adaptations of biocrusts microorganisms are limited. Here, we applied metagenomic sequencing to study biocrusts from east Antarctica. Biocrusts were dominated by cyanobacteria, actinobacteria and proteobacteria. Furthermore, the results provided insights into the presence and abundance of cold shock proteins (Csp), cold shock domain A proteins (CsdA), and antifreeze proteins (AFP) in these extreme environments. The metagenomic analysis revealed a high number of CsdA across the samples. The majority of the Csp recorded in the studied biocrusts were Csp A, C, and E. In addition, CsdA, Csp, and AFP primarily originated from proteobacteria and actinobacteria.

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