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A thermal hysteresis-producing xylomannan glycolipid antifreeze associated with cold tolerance is found in diverse taxa

TitleA thermal hysteresis-producing xylomannan glycolipid antifreeze associated with cold tolerance is found in diverse taxa
Publication TypeJournal Article
Year of Publication2011
AuthorsWalters, KR, Serianni, AS, Voituron, Y, Sformo, T, Barnes, BM, Duman, JG
JournalJournal of Comparative Physiology B
Volume181
Pagination631–640
Abstract

The presence of large-molecular-mass, thermalhysteresis (TH)-producing antifreezes (e.g., antifreeze proteins)has been reported in numerous and diverse taxa,including representative species of fish, arthropods, plants,fungi, and bacteria. However, relatively few of these antifreezemolecules have been chemically characterized. Wescreened diverse species by subjecting their homogenates toice-affinity purification and discovered the presence of anewly identified class of antifreeze, a xylomannan-basedTH-producing glycolipid that was previously reported inone species of freeze-tolerant Alaskan beetle. We isolatedxylomannan-based antifreeze glycolipids from one plantspecies, six insect species, and the first frog species to beshown to produce a large-molecular-mass antifreeze. 1HNMR spectra of the ice-purified molecules isolated fromthese diverse freeze-tolerant and freeze-avoiding organismswere nearly identical, indicating that the chemical structuresof the glycolipids were highly similar. Although the exactfunctions remain uncertain, it appears that antifreeze glycolipidsplay a role in cold tolerance.

DOI10.1007/s00360-011-0552-8
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