Janthinobacterium CG23_2: Comparative Genome Analysis Reveals Enhanced Environmental Sensing and Transcriptional Regulation for Adaptation to Life in an Antarctic Supraglacial Stream
As many bacteria detected in Antarctic environments are neither true psychrophiles nor endemic species, their proliferation in spite of environmental extremes gives rise to genome adaptations. Janthinobacterium sp. CG23_2 is a bacterial isolate from the Cotton Glacier stream, Antarctica. To understa...
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ftpubmed:oai:pubmedcentral.nih.gov:6843130 2023-05-15T13:55:09+02:00 Janthinobacterium CG23_2: Comparative Genome Analysis Reveals Enhanced Environmental Sensing and Transcriptional Regulation for Adaptation to Life in an Antarctic Supraglacial Stream Dieser, Markus Smith, Heidi J. Ramaraj, Thiruvarangan Foreman, Christine M. 2019-10-15 http://www.ncbi.nlm.nih.gov/pmc/articles/PMC6843130/ http://www.ncbi.nlm.nih.gov/pubmed/31618878 https://doi.org/10.3390/microorganisms7100454 en eng MDPI http://www.ncbi.nlm.nih.gov/pmc/articles/PMC6843130/ http://www.ncbi.nlm.nih.gov/pubmed/31618878 http://dx.doi.org/10.3390/microorganisms7100454 © 2019 by the authors. Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (http://creativecommons.org/licenses/by/4.0/). CC-BY Article Text 2019 ftpubmed https://doi.org/10.3390/microorganisms7100454 2019-12-01T01:18:46Z As many bacteria detected in Antarctic environments are neither true psychrophiles nor endemic species, their proliferation in spite of environmental extremes gives rise to genome adaptations. Janthinobacterium sp. CG23_2 is a bacterial isolate from the Cotton Glacier stream, Antarctica. To understand how Janthinobacterium sp. CG23_2 has adapted to its environment, we investigated its genomic traits in comparison to genomes of 35 published Janthinobacterium species. While we hypothesized that genome shrinkage and specialization to narrow ecological niches would be energetically favorable for dwelling in an ephemeral Antarctic stream, the genome of Janthinobacterium sp. CG23_2 was on average 1.7 ± 0.6 Mb larger and predicted 1411 ± 499 more coding sequences compared to the other Janthinobacterium spp. Putatively identified horizontal gene transfer events contributed 0.92 Mb to the genome size expansion of Janthinobacterium sp. CG23_2. Genes with high copy numbers in the species-specific accessory genome of Janthinobacterium sp. CG23_2 were associated with environmental sensing, locomotion, response and transcriptional regulation, stress response, and mobile elements—functional categories which also showed molecular adaptation to cold. Our data suggest that genome plasticity and the abundant complementary genes for sensing and responding to the extracellular environment supported the adaptation of Janthinobacterium sp. CG23_2 to this extreme environment. Text Antarc* Antarctic Antarctica PubMed Central (PMC) Antarctic Cotton Glacier ENVELOPE(161.667,161.667,-77.117,-77.117) Microorganisms 7 10 454 |
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Article Dieser, Markus Smith, Heidi J. Ramaraj, Thiruvarangan Foreman, Christine M. Janthinobacterium CG23_2: Comparative Genome Analysis Reveals Enhanced Environmental Sensing and Transcriptional Regulation for Adaptation to Life in an Antarctic Supraglacial Stream |
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As many bacteria detected in Antarctic environments are neither true psychrophiles nor endemic species, their proliferation in spite of environmental extremes gives rise to genome adaptations. Janthinobacterium sp. CG23_2 is a bacterial isolate from the Cotton Glacier stream, Antarctica. To understand how Janthinobacterium sp. CG23_2 has adapted to its environment, we investigated its genomic traits in comparison to genomes of 35 published Janthinobacterium species. While we hypothesized that genome shrinkage and specialization to narrow ecological niches would be energetically favorable for dwelling in an ephemeral Antarctic stream, the genome of Janthinobacterium sp. CG23_2 was on average 1.7 ± 0.6 Mb larger and predicted 1411 ± 499 more coding sequences compared to the other Janthinobacterium spp. Putatively identified horizontal gene transfer events contributed 0.92 Mb to the genome size expansion of Janthinobacterium sp. CG23_2. Genes with high copy numbers in the species-specific accessory genome of Janthinobacterium sp. CG23_2 were associated with environmental sensing, locomotion, response and transcriptional regulation, stress response, and mobile elements—functional categories which also showed molecular adaptation to cold. Our data suggest that genome plasticity and the abundant complementary genes for sensing and responding to the extracellular environment supported the adaptation of Janthinobacterium sp. CG23_2 to this extreme environment. |
format |
Text |
author |
Dieser, Markus Smith, Heidi J. Ramaraj, Thiruvarangan Foreman, Christine M. |
author_facet |
Dieser, Markus Smith, Heidi J. Ramaraj, Thiruvarangan Foreman, Christine M. |
author_sort |
Dieser, Markus |
title |
Janthinobacterium CG23_2: Comparative Genome Analysis Reveals Enhanced Environmental Sensing and Transcriptional Regulation for Adaptation to Life in an Antarctic Supraglacial Stream |
title_short |
Janthinobacterium CG23_2: Comparative Genome Analysis Reveals Enhanced Environmental Sensing and Transcriptional Regulation for Adaptation to Life in an Antarctic Supraglacial Stream |
title_full |
Janthinobacterium CG23_2: Comparative Genome Analysis Reveals Enhanced Environmental Sensing and Transcriptional Regulation for Adaptation to Life in an Antarctic Supraglacial Stream |
title_fullStr |
Janthinobacterium CG23_2: Comparative Genome Analysis Reveals Enhanced Environmental Sensing and Transcriptional Regulation for Adaptation to Life in an Antarctic Supraglacial Stream |
title_full_unstemmed |
Janthinobacterium CG23_2: Comparative Genome Analysis Reveals Enhanced Environmental Sensing and Transcriptional Regulation for Adaptation to Life in an Antarctic Supraglacial Stream |
title_sort |
janthinobacterium cg23_2: comparative genome analysis reveals enhanced environmental sensing and transcriptional regulation for adaptation to life in an antarctic supraglacial stream |
publisher |
MDPI |
publishDate |
2019 |
url |
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC6843130/ http://www.ncbi.nlm.nih.gov/pubmed/31618878 https://doi.org/10.3390/microorganisms7100454 |
long_lat |
ENVELOPE(161.667,161.667,-77.117,-77.117) |
geographic |
Antarctic Cotton Glacier |
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Antarctic Cotton Glacier |
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Antarc* Antarctic Antarctica |
genre_facet |
Antarc* Antarctic Antarctica |
op_relation |
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC6843130/ http://www.ncbi.nlm.nih.gov/pubmed/31618878 http://dx.doi.org/10.3390/microorganisms7100454 |
op_rights |
© 2019 by the authors. Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (http://creativecommons.org/licenses/by/4.0/). |
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CC-BY |
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https://doi.org/10.3390/microorganisms7100454 |
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Microorganisms |
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