Tab. 1: Summary of available data about antifreeze peptides of polar fish ...
In the blood of Antarctic notothenioid and Arctic gadiform fishes, freezing is inhibited by antifreeze glycopeptide macromolecules (AFGP). These antifreeze molecules are built up of repeating tripeptide units (Ala-Ala-Thr)n, to which the disaccharide fl-D-galactosyl-(1->3)a-N-acetyl-D-galactosami...
| Main Author: | |
|---|---|
| Format: | Dataset |
| Language: | English |
| Published: |
PANGAEA
2011
|
| Subjects: | |
| Online Access: | https://dx.doi.org/10.1594/pangaea.764416 https://doi.pangaea.de/10.1594/PANGAEA.764416 |
| Summary: | In the blood of Antarctic notothenioid and Arctic gadiform fishes, freezing is inhibited by antifreeze glycopeptide macromolecules (AFGP). These antifreeze molecules are built up of repeating tripeptide units (Ala-Ala-Thr)n, to which the disaccharide fl-D-galactosyl-(1->3)a-N-acetyl-D-galactosamine is linked through the hydroxyl oxygen of the threonyl residue. Species of Liparididae, Zoarcidae, Cottidae and Pleuronectidae synthezise only unglycosylated antifreeze peptides (AFP). It could be demonstrated for the Antarctic silverfish Pleuragramma antarcticum that the synthesis of AFGP is not constitutive but rather regulated by water temperature. Moreover a novel glycopeptid was isolated and characterised from P. antarcticum, the Pleuragramma-antifreeze glycopeptid (PAGP). The level of antifreeze concentration was dependent on the ambient water temperature, the depth of distribution, the life cycle and the evolution of the species. Surprisingly, detectable AFGPs in perciform fish of the Antarctic and ... : Supplement to: Wöhrmann, Andreas P A (1997): Gefrierschutzsubstanzen bei Fischen der Polarmeere und ihre Bedeutung für Evolution und Ökologie. Polarforschung, 65(1), 27-40 ... |
|---|