A new view on the role of phospholipids fatty acids: Possibility of electric charge transfer in the membrane monolayer |
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Authors: | S A Zabelinskii M A Chebotareva A I Krivchenko |
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Institution: | (1) Sechenov Institute of Evolutionary Physiology and Biochemistry, Russian Academy of Sciences, St. Petersburg, Russia |
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Abstract: | The fatty acid composition of phospholipids of subcellular fractions that are both generators and consumers of energy, mitochondria,
synaptosomes, and myelin, has been studied in the brain and liver of several representatives of poikilothermal and homoiothermal
vertebrates. The terrestrial poikilothermal animals have been shown to be close to homoiothermal animals by the main characteristics
of membranes of the subcellular fractions, such as the content of saturated acids, the unsaturation index, and the ω3/ω6 acid
ratio, but differ essentially from aquatic poikilotherms. The conclusion is made that the similarity in the fatty acid characteristics
of the terrestrial poikilothermal and homoiothermal vertebrate membranes is due to their inhabitation in the oxygen-rich environment,
while differences in intensity of the oxygen consumption are due to their different body temperatures. The models of structure
of an arbitrary fragment of the lipid component of the studied trout membranes are presented, which illustrate a concept of
a new functional role of fatty acids as participants of the electron transfer chain in the membrane. |
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