The dynamics of lipid motion in sarcoplasmic reticulum membranes determined by steady-state and time-resolved fluorescence measurements on 1,6-diphenyl-1,3,5-hexatriene and related molecules

Christopher D. Stubbs, Kazuhiko Kinosita, Felix Munkonge, Peter J. Quinn, Akira Ikegami

Research output: Contribution to journalArticle

45 Citations (Scopus)

Abstract

Steady-state and time-resolved fluorescence anisotropy measurements were made on 1,6-diphenyl-1,3,5-hexatriene (DPH), 1-(4-trimethylammoniumphenyl)-6-phenyl-1,3,5-hexatriene (TMA-DPH) and 1-acyl-2-(DPH)-phosphatidylcholine (DPH-PC) incorporated into sarcoplasmic reticulum membranes. The results were analysed in terms of the 'wobbling-in-cone' model. Considerable differences in the fluorescence parameters were found. In particular TMA-DPH and DPH-PC showed a smaller cone angle, relating to the range of acyl chain motion, compared to DPH, taken to be a reflection of a difference in probe locations. The influence of the protein component was also found to restrict DPH motion more than TMA-DPH and DPH-PC. Effectiveness in assessment of perturbation of the membrane by the non-esterified fatty acid, oleic acid again revealed differences. The steady-state anisotropy decreased on addition of oleic acid; a recovery to control values was observed with DPH but not with the other probes. Time-resolved parameters followed the same pattern. The results of this work demonstrated the effectiveness of these three probes in revealing differences in membrane properties, such as protein and fatty acid perturbation of membrane lipid structure and dynamics.

Original languageEnglish
Pages (from-to)374-380
Number of pages7
JournalBBA - Biomembranes
Volume775
Issue number3
DOIs
Publication statusPublished - 1984 Sep 5
Externally publishedYes

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Keywords

  • (Rabbit skeletal muscle)
  • Fluorescence
  • Fluorescence probe
  • Lipid dynamics
  • Sarcoplasmic reticulum
  • Steady-state fluorescence
  • Time-resolved fluorescence

ASJC Scopus subject areas

  • Biochemistry
  • Biophysics
  • Cell Biology

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