The thermotropic behavior and major molecular species composition of the phospholipids of echinoderms

被引：14

作者：

Kostetsky, E. Ya ^{[1
]}

Sanina, N. M. ^{[1
]}

Velansky, P. V. ^{[1
]}

机构：

[1] Far Eastern Fed Univ, Vladivostok 690091, Russia

来源：

RUSSIAN JOURNAL OF MARINE BIOLOGY | 2014年 / 40卷 / 02期

关键词：

phospholipids; molecular species of phosphatidylcholine and phosphatidylethanolamine; echinoderms; thermal adaptation; crystalline-liquid crystalline phase transitions; THERMAL ADAPTATION; SEA; PHOSPHATIDYLETHANOLAMINE; ORGANS; OCEAN; EGG;

D O I：

10.1134/S1063074014020059

中图分类号：

Q17 [水生生物学];

学科分类号：

071004 ;

摘要：

This study examines the molecular species composition and heat-induced crystalline-liquid crystalline phase transitions of phosphatidylcholine (PC) and phosphatidylethanolamine (PE) from the muscle tissues of six species of echinoderms that were collected during the summer: the starfishes Distolasterias nipon and Asterias amurensis, the sea urchin Strongylocentrotus intermedius, and the holothurians Eupentacta fraudatrix, Cucumaria frondosa japonica, and Apostichopus japonicus. Phospholipids (PLs) were in the liquid crystalline state, which is optimal for the functioning of the cell membranes. The use of data on the molecular species composition of PLs for the interpretation of their thermotropic behavior indicated that homeoviscous adaptation is achieved by various rearrangements in the composition of the aliphatic groups of PLs. The phase transitions of PC and PE of echinoderms (except holothurians) were symbatic. The presence of a high-temperature peak on the PC thermograms of C. frondosa japonica and A. japonicus is attributable to the melting of the phospholipid domain, which is composed of molecular species with saturated aliphatic groups. Such domains are responsible for a significant shift in the temperature ranges of the phase transitions of phospholipids of holothurians and sea urchin towards temperatures above 0A degrees C.

引用

页码：131 / 139

页数：9

共 27 条

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