The genome of the Antarctic-endemic copepod, Tigriopus kingsejongensis

Abstract Background: The Antarctic intertidal zone is continuously subjected to extremely fluctuating biotic and abiotic stressors. The West Antarctic Peninsula is the most rapidly warming region on Earth. Organisms living in Antarctic intertidal pools are therefore interesting for research into evo...

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Published in:Gigascience 2017-01, Vol.6 (1), p.1-9
Main Authors: Kang, Seunghyun, Ahn, Do-Hwan, Lee, Jun Hyuck, Lee, Sung Gu, Shin, Seung Chul, Lee, Jungeun, Min, Gi-Sik, Lee, Hyoungseok, Kim, Hyun-Woo, Kim, Sanghee, Park, Hyun
Format: Article
Language:English
Subjects:
Adaptation
Adaptation, Physiological - genetics
Animals
Annotations
Antarctic Regions
Climate change
Cold Temperature
Copepoda - genetics
Data Note
Energy metabolism
Evolution, Molecular
Extreme environments
Genes
Genome
Genomes
Metabolism
Nucleotide sequence
Positive selection
Sequence Analysis, DNA
Tigriopus
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Summary:Abstract Background: The Antarctic intertidal zone is continuously subjected to extremely fluctuating biotic and abiotic stressors. The West Antarctic Peninsula is the most rapidly warming region on Earth. Organisms living in Antarctic intertidal pools are therefore interesting for research into evolutionary adaptation to extreme environments and the effects of climate change. Findings: We report the whole genome sequence of the Antarctic-endemic harpacticoid copepod Tigriopus kingsejongensi. The 37 Gb raw DNA sequence was generated using the Illumina Miseq platform. Libraries were prepared with 65-fold coverage and a total length of 295 Mb. The final assembly consists of 48 368 contigs with an N50 contig length of 17.5 kb, and 27 823 scaffolds with an N50 contig length of 159.2 kb. A total of 12 772 coding genes were inferred using the MAKER annotation pipeline. Comparative genome analysis revealed that T. kingsejongensis-specific genes are enriched in transport and metabolism processes. Furthermore, rapidly evolving genes related to energy metabolism showed positive selection signatures. Conclusions: The T. kingsejongensis genome provides an interesting example of an evolutionary strategy for Antarctic cold adaptation, and offers new genetic insights into Antarctic intertidal biota.
ISSN:2047-217X
2047-217X
DOI:10.1093/gigascience/giw010