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De novo assembly and characterisation of the transcriptome of the Beringian pseudoscorpion

Published online by Cambridge University Press:  24 February 2021

Jacqueline E. Lebenzon*
Affiliation:
Department of Biology, University of Western Ontario, 1151 Richmond Street N, London, Ontario, N6A 3K7, Canada
Jantina Toxopeus
Affiliation:
Department of Biology, University of Western Ontario, 1151 Richmond Street N, London, Ontario, N6A 3K7, Canada
Susan E. Anthony
Affiliation:
Department of Biology, University of Western Ontario, 1151 Richmond Street N, London, Ontario, N6A 3K7, Canada
Brent J. Sinclair
Affiliation:
Department of Biology, University of Western Ontario, 1151 Richmond Street N, London, Ontario, N6A 3K7, Canada
*
*Corresponding author. Email: jlebenzo@uwo.ca

Abstract

Pseudoscorpions are microarthropods that are distributed from the equator to beyond the Arctic circle. Wyochernes asiaticus (Arachnida: Pseudoscorpiones: Chernetidae) is the northernmost species of pseudoscorpion and is broadly distributed in Beringia, an Arctic and sub-Arctic region that remained unglaciated during the last glacial maximum. Wyochernes asiaticus is anoxia tolerant and has moderate cold tolerance, but nothing is known about the molecular basis of their survival in Canadian polar environments. We de novo assembled and characterised the transcriptome of W. asiaticus collected from the Yukon Territory in northwestern Canada. We assembled an approximately 62.6-million base-pair transcriptome with a mean contig length of 1277, which was 76% complete, according to a benchmark universal single copy orthologue (BUSCO) analysis. We identified 1100 transcripts encoding proteins associated with stress tolerance in these pseudoscorpions, including heat shock proteins, antioxidants, ubiquitination and proteosomal proteins, and sirtuins. We also identified transcripts encoding putative venom proteins. We highlight eight transcripts with high sequence similarity to sequences of venom proteins (ctenitoxins and agatoxins) described from other pseudoscorpions. Our study yields the first transcriptome of a Beringian arthropod, providing important sequence information that will allow future investigation of how W. asiaticus survives in Canadian polar environments.

Type
Research Papers
Copyright
© The Author(s), 2021. Published by Cambridge University Press on behalf of the Entomological Society of Canada

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Footnotes

Present address: Biology Department, St. Francis Xavier University, 2321 Notre Dame Avenue, Antigonish, Nova Scotia, B2G 2W5, Canada.

Subject editor: Amanda Roe

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