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Correlation between fluidity and fatty acid composition of phospholipid species in Tetrahymena pyriformis during temperature acclimation

Ohki, K.; Kasai, R.; Nozawa, Y.

Biochimica et Biophysica Acta 558(3): 273-281

1979


ISSN/ISBN: 0006-3002
PMID: 228721
DOI: 10.1016/0005-2736(79)90262-1
Accession: 039693790

The correlation between the fluidity of phospholipids and their fatty acid composition was studied by spin label technique and gas-liquid chromatography for three major phospholipid species in Tetrahymena pyriformis during temperature acclimation. The fluidity of 2-aminoethylphosphonolipid increased within the first 10 h of the cold-acclimation when the content of gamma-linolenic acid in 2-aminoethylphosphonolipid was highest, and it then decreased up to 24 h. On the other hand, the fluidities of phosphatidylethanolamine and phosphatidylcholine showed a gradual decrease up to 24 h after the temperature shift, although gamma-linolenic acid contents were highest at 10 h after the temperature shift. Thus the fluidity changes of these two phospholipids were interpreted as resulting from the altered content of other fatty acids in addition to gamma-linolenic acid, since the gamma-linolenic acid content was smaller than that of 2-aminoethylphosphonolipid. The results suggest that the content of gamma-linolenic acid in 2-aminoethylphosphonolipid plays a role in regulating the thermal adaptation process.

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