Homogeneous Catalytic Deuteration of Fatty Acyl Chains as a Tool to Detect Lipid Phase Transitions in Specific Membrane Domains: A Fourier Transform Infrared Spectroscopic Study

Z. Torok, B. Szalontai, F. Joo, C. A. Wistrom, L. Vígh

Research output: Article

12 Citations (Scopus)

Abstract

Synthetic phospholipid molecules have been deuterated by using a water soluble catalyst and deuterium gas. The physical state of both deuterated segments and unaffected bulk part of the lipid molecules can be monitored simultaneously by Fourier Transform Infrared Spectroscopy. It is shown on multilamellar phospholipid systems that the deuterated segments can be used as structural probes. Whereas the ν(C-H) frequencies represent an average conformational order along all the alkyl chains present, by following changes in ν(C-D) vibrations, mobility of those membrane domains deuterium labeled at specific depths in the hydrocarbon core can be estimated. The potential importance of this new approach in the study of biological membranes is discussed.

Original languageEnglish
Pages (from-to)518-524
Number of pages7
JournalBiochemical and Biophysical Research Communications
Volume192
Issue number2
DOIs
Publication statusPublished - ápr. 30 1993

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Deuterium
Phase Transition
Fourier Analysis
Phospholipids
Fourier transforms
Phase transitions
Infrared radiation
Membranes
Biological membranes
Lipids
Molecules
Fourier Transform Infrared Spectroscopy
Hydrocarbons
Vibration
Gases
Catalysts
Water

ASJC Scopus subject areas

  • Molecular Biology
  • Biophysics
  • Biochemistry

Cite this

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T1 - Homogeneous Catalytic Deuteration of Fatty Acyl Chains as a Tool to Detect Lipid Phase Transitions in Specific Membrane Domains

T2 - A Fourier Transform Infrared Spectroscopic Study

AU - Torok, Z.

AU - Szalontai, B.

AU - Joo, F.

AU - Wistrom, C. A.

AU - Vígh, L.

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AB - Synthetic phospholipid molecules have been deuterated by using a water soluble catalyst and deuterium gas. The physical state of both deuterated segments and unaffected bulk part of the lipid molecules can be monitored simultaneously by Fourier Transform Infrared Spectroscopy. It is shown on multilamellar phospholipid systems that the deuterated segments can be used as structural probes. Whereas the ν(C-H) frequencies represent an average conformational order along all the alkyl chains present, by following changes in ν(C-D) vibrations, mobility of those membrane domains deuterium labeled at specific depths in the hydrocarbon core can be estimated. The potential importance of this new approach in the study of biological membranes is discussed.

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