Molecular architecture and biophysical properties of phospholipids during thermal adaptation in fish: an experimental and model study

Lipids
E FodorT Farkas

Abstract

Phospholipids from livers of carps (Cyprinus carpio L.) adapted to winter (5 degrees C) and summer (25 degrees C) temperatures were isolated, and the fatty acid composition of total phospholipids, as well as molecular species composition of diacyl phosphatidylcholines and ethanolamines, were determined. Order parameter of 5-doxyl stearic acid and steady-state fluorescence anisotropy of different anthroyloxy fatty acids--[2-, 12(N-9-anthroyloxy)stearic acid and 16(N-9-anthroyloxy)palmitic acid--embedded in native and synthetic (16:0/16:0, 16:0/22:6, 18:0/22:6, 18:1/22:6, 20:4/20:4, 22:6/22:6 phosphatidylcholines and 16:0/18:1, 18:1/22:6 phosphatidylethanolamines) phospholipid vesicles was also determined between -30 and 30 degrees C and 5 and 30 degrees C, respectively. There is an accumulation of 1-monoenoic, 2-polyenoic diacyl phosphatidylcholine and ethanolamine with a concomitant reduction of 1-stearoyl,2-docosahexaenoyl species in the cold-adapted state. Despite a 30% accumulation of long-chain polyunsaturated fatty acids in phospholipids in cold, there is only a 5 degrees C downshift in the solid-gel to liquid-crystalline phase transition temperature (-8 vs. -13 degrees C). Vesicles from total phospholipids of cold-adapted...Continue Reading

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Citations

May 29, 2008·Journal of Comparative Physiology. B, Biochemical, Systemic, and Environmental Physiology·Elizabeth L Crockett
Mar 15, 2001·Comparative Biochemistry and Physiology. Toxicology & Pharmacology : CBP·T GabryelakG Brichon
Aug 3, 2011·The Journal of Chemical Physics·Chun-Min LinYu-Jane Sheng
May 24, 2000·Proceedings of the National Academy of Sciences of the United States of America·T FarkasJ E Halver
Sep 5, 1998·The American Journal of Physiology·J R HazelM F Gerrits

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