Salt effect on bilayer phase transitions of dipalmitoylphosphatidylglycerol in saline water under high pressure. Issue 2 (3rd April 2019)

• Record Type: Journal Article
• Authors: Goto, Masaki; Okamoto, Hirotsugu; Tamai, Nobutake; Fukada, Kazuhiro; Matsuki, Hitoshi
• Is Part Of: High pressure research. Volume 39:Issue 2(2019)
• Page Start: 238
• Page End: 247
• Publication Date: 2019-04-03
• Subjects: Bilayer membrane -- dipalmitoylphosphatidylglycerol (DPPG) -- interdigitation -- phase transition -- Prodan fluorescence; High pressure (Science) -- Periodicals; High pressure (Technology) -- Periodicals; 536.41
• DOI: 10.1080/08957959.2019.1601189
• Languages: English
• ISSNs: 0895-7959

Abstract

ABSTRACT: The phase transitions of dipalmitoylphosphatidylglycerol (DPPG) bilayer membrane at high NaCl concentrations under high pressure were investigated to construct the temperature–pressure phase diagram and to determine phase-transition properties. The constructed phase diagrams exhibited qualitative resemblance to that of the dipalmitoylphosphatidylcholine (DPPC) bilayer membrane: they showed the gel-phase polymorphism including the pressure-induced bilayer interdigitation. The phase-transition properties of the DPPG bilayer membrane changed in a salt concentration-dependent manner. We discussed the salt effect on the DPPG bilayer membrane from the variation in interactions between the polar head groups of the PG molecules.