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  The salmon louse genome: Copepod features and parasitic adaptations

Skern-Mauritzen, R., Malde, K., Eichner, C., Dondrup, M., Furmanek, T., Besnier, F., et al. (2021). The salmon louse genome: Copepod features and parasitic adaptations. Genomics. doi:10.1016/j.ygeno.2021.08.002.

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Skern-Mauritzen_2021 (pre-proof).pdf (Preprint), 803KB
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© 2021 The Authors

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Skern-Mauritzen, Rasmus, Author
Malde, Ketil, Author
Eichner, Christiane, Author
Dondrup, Michael, Author
Furmanek, Tomasz, Author
Besnier, Francois, Author
Komisarczuk, Anna Zofia , Author
Nuhn, Michael, Author
Dalvin, Sussie , Author
Edvardsen, Rolf B. , Author
Klages, Sven1, Author           
Huettel, Bruno, Author
Stueber, Kurt, Author
Grotmol, Sindre , Author
Karlsbakk, Egil, Author
Kersey, Paul, Author
Leong, Jong S. , Author
Glover, Kevin A. , Author
Reinhardt, Richard , Author
Lien, Sigbjørn , Author
Jonassen, Inge , AuthorKoop, Ben F. , AuthorNilsen, Frank , Author more..
Affiliations:
1Sequencing (Head: Bernd Timmermann), Scientific Service (Head: Christoph Krukenkamp), Max Planck Institute for Molecular Genetics, Max Planck Society, ou_1479670              

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Free keywords: Genome assembly FNII expansion Arthropod Peroxisome Repetitive DNA Major vault Comparative genomics
 Abstract: Copepods encompass numerous ecological roles including parasites, detrivores and phytoplankton grazers. Nonetheless, copepod genome assemblies remain scarce. Lepeophtheirus salmonis is an economically and ecologically important ectoparasitic copepod found on salmonid fish. We present the 695.4 Mbp L. salmonis genome assembly containing ≈60% repetitive regions and 13,081 annotated protein-coding genes. The genome comprises 14 autosomes and a ZZ-ZW sex chromosome system. Assembly assessment identified 92.4% of the expected arthropod genes. Transcriptomics supported annotation and indicated a marked shift in gene expression after host attachment, including apparent downregulation of genes related to circadian rhythm coinciding with abandoning diurnal migration. The genome shows evolutionary signatures including loss of genes needed for peroxisome biogenesis, presence of numerous FNII domains, and an incomplete heme homeostasis pathway suggesting heme proteins to be obtained from the host. Despite repeated development of resistance against chemical treatments L. salmonis exhibits low numbers of many genes involved in detoxification.

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Language(s): eng - English
 Dates: 2021-08-032021-08-14
 Publication Status: Published online
 Pages: -
 Publishing info: -
 Table of Contents: -
 Rev. Type: -
 Identifiers: DOI: 10.1016/j.ygeno.2021.08.002
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Title: Genomics
Source Genre: Journal
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Publ. Info: Amsterdam : Elsevier, Inc.
Pages: - Volume / Issue: - Sequence Number: - Start / End Page: - Identifier: ISSN: 0888-7543 (print)
ISSN: 1089-8646 (online)