Genomic Insights of Cryobacterium Isolated From Ice Core Reveal Genome Dynamics for Adaptation in Glacier
Glacier is the dominant cold habitat in terrestrial environments, providing a model ecosystem to explore extremophilic strategies and study early lives on Earth. The dominant form of life in glaciers is bacteria. However, little is known about past evolutionary processes that bacteria underwent duri...
Published in: | Frontiers in Microbiology |
---|---|
Main Authors: | , , , , , |
Format: | Article in Journal/Newspaper |
Language: | English |
Published: |
2020
|
Subjects: | |
Online Access: | https://pure.au.dk/portal/da/publications/genomic-insights-of-cryobacterium-isolated-from-ice-core-reveal-genome-dynamics-for-adaptation-in-glacier(b4c905a4-db19-4114-80f2-ddf4951c03b9).html https://doi.org/10.3389/fmicb.2020.01530 http://www.scopus.com/inward/record.url?scp=85088788509&partnerID=8YFLogxK |
id |
ftuniaarhuspubl:oai:pure.atira.dk:publications/b4c905a4-db19-4114-80f2-ddf4951c03b9 |
---|---|
record_format |
openpolar |
spelling |
ftuniaarhuspubl:oai:pure.atira.dk:publications/b4c905a4-db19-4114-80f2-ddf4951c03b9 2023-12-10T09:49:37+01:00 Genomic Insights of Cryobacterium Isolated From Ice Core Reveal Genome Dynamics for Adaptation in Glacier Liu, Yongqin Shen, Liang Zeng, Yonghui Xing, Tingting Xu, Baiqing Wang, Ninglian 2020-07 https://pure.au.dk/portal/da/publications/genomic-insights-of-cryobacterium-isolated-from-ice-core-reveal-genome-dynamics-for-adaptation-in-glacier(b4c905a4-db19-4114-80f2-ddf4951c03b9).html https://doi.org/10.3389/fmicb.2020.01530 http://www.scopus.com/inward/record.url?scp=85088788509&partnerID=8YFLogxK eng eng https://pure.au.dk/portal/da/publications/genomic-insights-of-cryobacterium-isolated-from-ice-core-reveal-genome-dynamics-for-adaptation-in-glacier(b4c905a4-db19-4114-80f2-ddf4951c03b9).html info:eu-repo/semantics/openAccess Liu , Y , Shen , L , Zeng , Y , Xing , T , Xu , B & Wang , N 2020 , ' Genomic Insights of Cryobacterium Isolated From Ice Core Reveal Genome Dynamics for Adaptation in Glacier ' , Frontiers in Microbiology , vol. 11 , 1530 . https://doi.org/10.3389/fmicb.2020.01530 cold adaptation Cryobacterium evolutionary processes genomic glacier article 2020 ftuniaarhuspubl https://doi.org/10.3389/fmicb.2020.01530 2023-11-16T00:00:18Z Glacier is the dominant cold habitat in terrestrial environments, providing a model ecosystem to explore extremophilic strategies and study early lives on Earth. The dominant form of life in glaciers is bacteria. However, little is known about past evolutionary processes that bacteria underwent during adaptation to the cryosphere and the connection of their genomic traits to environmental stressors. Aiming to test the hypothesis that bacterial genomic content and dynamics are driven by glacial environmental stressors, we compared genomes of 21 psychrophilic Cryobacterium strains, including 14 that we isolated from three Tibetan ice cores, to their mesophilic counterparts from the same family Microbacteriaceae of Actinobacteria. The results show that psychrophilic Cryobacterium underwent more dynamic changes in genome content, and their genomes have a significantly higher number of genes involved in stress response, motility, and chemotaxis than their mesophilic counterparts (P < 0.05). The phylogenetic birth-and-death model imposed on the phylogenomic tree indicates a vast surge in recent common ancestor of psychrophilic Cryobacterium (gained the greatest number of genes by 1,168) after the division of the mesophilic strain Cryobacterium mesophilum. The expansion in genome content brought in key genes primarily of the categories “cofactors, vitamins, prosthetic groups, pigments,” “monosaccharides metabolism,” and “membrane transport.” The amino acid substitution rates of psychrophilic Cryobacterium strains are two orders of magnitude lower than those in mesophilic strains. However, no significantly higher number of cold shock genes was found in psychrophilic Cryobacterium strains, indicating that multi-copy is not a key factor for cold adaptation in the family Microbacteriaceae, although cold shock genes are indispensable for psychrophiles. Extensive gene acquisition and low amino acid substitution rate might be the strategies of psychrophilic Cryobacterium to resist low temperature, oligotrophy, and high UV ... Article in Journal/Newspaper ice core Aarhus University: Research Frontiers in Microbiology 11 |
institution |
Open Polar |
collection |
Aarhus University: Research |
op_collection_id |
ftuniaarhuspubl |
language |
English |
topic |
cold adaptation Cryobacterium evolutionary processes genomic glacier |
spellingShingle |
cold adaptation Cryobacterium evolutionary processes genomic glacier Liu, Yongqin Shen, Liang Zeng, Yonghui Xing, Tingting Xu, Baiqing Wang, Ninglian Genomic Insights of Cryobacterium Isolated From Ice Core Reveal Genome Dynamics for Adaptation in Glacier |
topic_facet |
cold adaptation Cryobacterium evolutionary processes genomic glacier |
description |
Glacier is the dominant cold habitat in terrestrial environments, providing a model ecosystem to explore extremophilic strategies and study early lives on Earth. The dominant form of life in glaciers is bacteria. However, little is known about past evolutionary processes that bacteria underwent during adaptation to the cryosphere and the connection of their genomic traits to environmental stressors. Aiming to test the hypothesis that bacterial genomic content and dynamics are driven by glacial environmental stressors, we compared genomes of 21 psychrophilic Cryobacterium strains, including 14 that we isolated from three Tibetan ice cores, to their mesophilic counterparts from the same family Microbacteriaceae of Actinobacteria. The results show that psychrophilic Cryobacterium underwent more dynamic changes in genome content, and their genomes have a significantly higher number of genes involved in stress response, motility, and chemotaxis than their mesophilic counterparts (P < 0.05). The phylogenetic birth-and-death model imposed on the phylogenomic tree indicates a vast surge in recent common ancestor of psychrophilic Cryobacterium (gained the greatest number of genes by 1,168) after the division of the mesophilic strain Cryobacterium mesophilum. The expansion in genome content brought in key genes primarily of the categories “cofactors, vitamins, prosthetic groups, pigments,” “monosaccharides metabolism,” and “membrane transport.” The amino acid substitution rates of psychrophilic Cryobacterium strains are two orders of magnitude lower than those in mesophilic strains. However, no significantly higher number of cold shock genes was found in psychrophilic Cryobacterium strains, indicating that multi-copy is not a key factor for cold adaptation in the family Microbacteriaceae, although cold shock genes are indispensable for psychrophiles. Extensive gene acquisition and low amino acid substitution rate might be the strategies of psychrophilic Cryobacterium to resist low temperature, oligotrophy, and high UV ... |
format |
Article in Journal/Newspaper |
author |
Liu, Yongqin Shen, Liang Zeng, Yonghui Xing, Tingting Xu, Baiqing Wang, Ninglian |
author_facet |
Liu, Yongqin Shen, Liang Zeng, Yonghui Xing, Tingting Xu, Baiqing Wang, Ninglian |
author_sort |
Liu, Yongqin |
title |
Genomic Insights of Cryobacterium Isolated From Ice Core Reveal Genome Dynamics for Adaptation in Glacier |
title_short |
Genomic Insights of Cryobacterium Isolated From Ice Core Reveal Genome Dynamics for Adaptation in Glacier |
title_full |
Genomic Insights of Cryobacterium Isolated From Ice Core Reveal Genome Dynamics for Adaptation in Glacier |
title_fullStr |
Genomic Insights of Cryobacterium Isolated From Ice Core Reveal Genome Dynamics for Adaptation in Glacier |
title_full_unstemmed |
Genomic Insights of Cryobacterium Isolated From Ice Core Reveal Genome Dynamics for Adaptation in Glacier |
title_sort |
genomic insights of cryobacterium isolated from ice core reveal genome dynamics for adaptation in glacier |
publishDate |
2020 |
url |
https://pure.au.dk/portal/da/publications/genomic-insights-of-cryobacterium-isolated-from-ice-core-reveal-genome-dynamics-for-adaptation-in-glacier(b4c905a4-db19-4114-80f2-ddf4951c03b9).html https://doi.org/10.3389/fmicb.2020.01530 http://www.scopus.com/inward/record.url?scp=85088788509&partnerID=8YFLogxK |
genre |
ice core |
genre_facet |
ice core |
op_source |
Liu , Y , Shen , L , Zeng , Y , Xing , T , Xu , B & Wang , N 2020 , ' Genomic Insights of Cryobacterium Isolated From Ice Core Reveal Genome Dynamics for Adaptation in Glacier ' , Frontiers in Microbiology , vol. 11 , 1530 . https://doi.org/10.3389/fmicb.2020.01530 |
op_relation |
https://pure.au.dk/portal/da/publications/genomic-insights-of-cryobacterium-isolated-from-ice-core-reveal-genome-dynamics-for-adaptation-in-glacier(b4c905a4-db19-4114-80f2-ddf4951c03b9).html |
op_rights |
info:eu-repo/semantics/openAccess |
op_doi |
https://doi.org/10.3389/fmicb.2020.01530 |
container_title |
Frontiers in Microbiology |
container_volume |
11 |
_version_ |
1784894151691599872 |