Evidence of cycloiridals as membrane constituents: effects on fluidity patterns compared to those of cholesterol

Autor:	Luc Maurin, Jean-Paul Bonfils, Yves Sauvaire
Rok vydání:	1996
Předmět:	chemistry.chemical_classification Liposome Chromatography Cholesterol Synthetic membrane Phospholipid Plant Science chemistry.chemical_compound Membrane chemistry Triterpene Phosphatidylcholine Genetics Irone
Zdroj:	Planta. 200
ISSN:	1432-2048 0032-0935
DOI:	10.1007/bf00200303
Popis:	Two triterpenoids, iripallidal and iriflorental, known irone precursors, were shown to be solubilized by phosphatidylcholine (PC). Elution of liposomes (containing PC + iridals) on a Sephadex column showed that iridals and PC were always associated in the same fractions with comparable PC/iridal molecular ratios. Moreover, the physical parameters of dimyristoyl-PC membranes, measured by electron spin resonance were specifically modified by the presence of cycloiridals, indicating that they are integrated within liposomal membranes. These effects on fluidity and phase-transition patterns were compared with those of cholesterol. The secondary plant products, iridals, seem to have a structural role within cells comparable to that of sterols. Possible ecophysiological implications of iridals are discussed.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::8d474bf5f5ac63ec429faefa97ec1805 https://doi.org/10.1007/bf00200303 Zobrazit plný text záznamu Full text from SpringerLink