Data Description

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Citation:
Wöhrmann, APA (2011): Tab. 1: Summary of available data about antifreeze peptides of polar fish. doi:10.1594/PANGAEA.764416,
Supplement to: Wöhrmann, Andreas P A (1997): Gefrierschutzsubstanzen bei Fischen der Polarmeere und ihre Bedeutung für Evolution und Ökologie. Polarforschung, 65(1), 27-40, hdl:10013/epic.29739.d001
Abstract:
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 gadiform fish of the Arctic and Antarctic could illustrate, that before the continental drift occurred a precursor glycopeptid existed, and that the existence of freezing resistance in some species reflects the past glaciation. The wide distribution and high heterogeneity of AFPs point to the assumption that these peptides are results of cold shock stress responses.
Parameter(s):
#NameShort NameUnitPrincipal InvestigatorMethodComment
1Area/locality *Areasee references *
2Family *Familysee references *
3Species *Speciessee references *
4Type *Typesee references *AF-Typ
5Percentage *Perc%see references *FRG
6Thermal hysteresis *TH°Csee references *
7Thermal hysteresis *TH°Csee references *Serum
8Area/locality *Areasee references *Fangregion
9Temperature, water, minimum *Temp min°Csee references *# means "about"
10Temperature, water, maximum *Temp max°Csee references *
11Occurrence *Occursee references *Verbreitung
12Mode of life *Livingsee references *Lebensweise
13Reference/source *Referencesee references *
License:
CC-BY Creative Commons Attribution 3.0 Unported
Size:
761 data points

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