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Proteomics of intracellular freezing survival

Published version
Peer-reviewed

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Authors

Thorne, Michael A. S.  ORCID logo  https://orcid.org/0000-0001-7759-612X
Britovšek, Nina Kočevar 
Lilley, Kathryn S. 
Storey, Kenneth 

Abstract

Panagrolaimus sp. DAW1, a nematode cultured from the Antarctic, has the extraordinary physiological ability to survive total intracellular freezing throughout all of its compartments. While a few other organisms, all nematodes, have subsequently also been found to survive freezing in this manner, P. sp. DAW1 has so far shown the highest survival rates. In addition, P. sp. DAW1 is also, depending on the rate or extent of freezing, able to undergo cryoprotective dehydration. In this study, the proteome of P. sp DAW1 is explored, highlighting a number of differentially expressed proteins and pathways that occur when the nematodes undergo intracellular freezing. Among the strongest signals after being frozen is an upregulation of proteases and the downregulation of cytoskeletal and antioxidant activity, the latter possibly accumulated before freezing much in the way the sugar trehalose has been shown to be stored during acclimation.

Description

Keywords

Research Article, Biology and life sciences, Physical sciences, Research and analysis methods

Journal Title

PLOS ONE

Conference Name

Journal ISSN

1932-6203

Volume Title

15

Publisher

Public Library of Science