Metal Complex Lipids for Fluid–Fluid Phase Separation in Coassembled Phospholipid Membranes

Ryo Ohtani, Yuka Anegawa, Hikaru Watanabe, Yutaro Tajima, Masanao Kinoshita, Nobuaki Matsumori, Kenichi Kawano, Saeko Yanaka, Koichi Kato, Masaaki Nakamura, Masaaki Ohba, Shinya Hayami

Research output: Contribution to journalArticlepeer-review

Abstract

We demonstrate a fluid–fluid phase separation in 1,2-dimyristoyl-sn-glycero-3-phosphocholine (DMPC) membranes using a metal complex lipid of type [Mn(L1)] (1; HL1=1-(2-hydroxybenzamide)-2-(2-hydroxy-3-formyl-5-hexadecyloxybenzylideneamino)ethane). Small amount of 1 produces two separated domains in DMPC, whose phase transition temperatures of lipids (Tc) are both lower than that of the pristine DMPC. Variable temperature fluorescent microscopy for giant-unilamellar vesicles of DMPC/1 hybrids demonstrates that visible phase separations remain in fluid phases up to 37 °C, which is clearly over the Tc of DMPC. This provides a new dimension for the application of metal complex lipids toward controlling lipid distributions in fluid membranes.

Original languageEnglish
JournalAngewandte Chemie - International Edition
DOIs
Publication statusAccepted/In press - 2021

All Science Journal Classification (ASJC) codes

  • Catalysis
  • Chemistry(all)

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