Complete genome of Polaromonas vacuolata KCTC 22033T isolated from beneath Antarctic Sea ice

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Title
Complete genome of Polaromonas vacuolata KCTC 22033T isolated from beneath Antarctic Sea ice
Author(s)
K Hwang; Han Na Choe; A Nasir; K M Kim
Bibliographic Citation
Marine Genomics, vol. 55, pp. 100790-100790
Publication Year
2021
Abstract
Polaromonas vacuolata KCTC 22033T is an obligate aerobic, Gram-negative, psychrophilic and rod-shaped bacterium isolated from beneath the sea ice off the coast of the Palmer Peninsula, Anvers Islands, Antarctica. P. vacuolata is the type species of Polaromonas genus and the first example of gas vacuolate Betaproteobacteria isolated from marine habitats. Here, we report a complete genome of P. vacuolata KCTC 22033T, which consists of 3,837,686 bp (G + C content of 52.07%) with a single chromosome, 3461 protein-coding genes, 56 tRNAs and 6 rRNA operons. Genomic analysis revealed the presence of genes involved in bacterial adaptation under saline conditions, cold adaptation via the production of gas vesicles and cell adhesion proteins, and a photoheterotrophic lifestyle when challenged by starvation. Intriguingly, several of these genes were likely acquired from species outside the Polaromonas genus. The genomic information therefore describes the unique evolution and adaptation of P. vacuolata to its extraordinary habitat, i.e., beneath the Antarctic sea ice.
Keyword
BetaineGenome reductionHorizontal gene transferPsychrophileRhodopsin
ISSN
1874-7787
Publisher
Elsevier
DOI
http://dx.doi.org/10.1016/j.margen.2020.100790
Type
Article
Appears in Collections:
Jeonbuk Branch Institute > Biological Resource Center > 1. Journal Articles
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