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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ftmdpi:oai:mdpi.com:/2076-2607/7/10/454/ 2023-08-20T04:01:05+02:00 Janthinobacterium CG23_2: Comparative Genome Analysis Reveals Enhanced Environmental Sensing and Transcriptional Regulation for Adaptation to Life in an Antarctic Supraglacial Stream Markus Dieser Heidi J. Smith Thiruvarangan Ramaraj Christine M. Foreman agris 2019-10-15 application/pdf https://doi.org/10.3390/microorganisms7100454 EN eng Multidisciplinary Digital Publishing Institute Environmental Microbiology https://dx.doi.org/10.3390/microorganisms7100454 https://creativecommons.org/licenses/by/4.0/ Microorganisms; Volume 7; Issue 10; Pages: 454 Janthinobacterium comparative genomics horizontal gene transfer cold adaptation environmental sensing Text 2019 ftmdpi https://doi.org/10.3390/microorganisms7100454 2023-07-31T22:41:50Z 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 MDPI Open Access Publishing Antarctic Cotton Glacier ENVELOPE(161.667,161.667,-77.117,-77.117) Microorganisms 7 10 454 |
institution |
Open Polar |
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MDPI Open Access Publishing |
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ftmdpi |
language |
English |
topic |
Janthinobacterium comparative genomics horizontal gene transfer cold adaptation environmental sensing |
spellingShingle |
Janthinobacterium comparative genomics horizontal gene transfer cold adaptation environmental sensing Markus Dieser Heidi J. Smith Thiruvarangan Ramaraj Christine M. Foreman Janthinobacterium CG23_2: Comparative Genome Analysis Reveals Enhanced Environmental Sensing and Transcriptional Regulation for Adaptation to Life in an Antarctic Supraglacial Stream |
topic_facet |
Janthinobacterium comparative genomics horizontal gene transfer cold adaptation environmental sensing |
description |
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 |
Markus Dieser Heidi J. Smith Thiruvarangan Ramaraj Christine M. Foreman |
author_facet |
Markus Dieser Heidi J. Smith Thiruvarangan Ramaraj Christine M. Foreman |
author_sort |
Markus Dieser |
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 |
Multidisciplinary Digital Publishing Institute |
publishDate |
2019 |
url |
https://doi.org/10.3390/microorganisms7100454 |
op_coverage |
agris |
long_lat |
ENVELOPE(161.667,161.667,-77.117,-77.117) |
geographic |
Antarctic Cotton Glacier |
geographic_facet |
Antarctic Cotton Glacier |
genre |
Antarc* Antarctic Antarctica |
genre_facet |
Antarc* Antarctic Antarctica |
op_source |
Microorganisms; Volume 7; Issue 10; Pages: 454 |
op_relation |
Environmental Microbiology https://dx.doi.org/10.3390/microorganisms7100454 |
op_rights |
https://creativecommons.org/licenses/by/4.0/ |
op_doi |
https://doi.org/10.3390/microorganisms7100454 |
container_title |
Microorganisms |
container_volume |
7 |
container_issue |
10 |
container_start_page |
454 |
_version_ |
1774722560957612032 |