Regulatory role of membrane fluidity in gene expression and physiological functions

Dmitry A. Los, Kirill S. Mironov, Suleyman I. Allakhverdiev

Research output: Contribution to journalReview article

99 Citations (Scopus)

Abstract

Plants, algae, and photosynthetic bacteria experience frequent changes in environment. The ability to survive depends on their capacity to acclimate to such changes. In particular, fluctuations in temperature affect the fluidity of cytoplasmic and thylakoid membranes. The molecular mechanisms responsible for the perception of changes in membrane fluidity have not been fully characterized. However, the understanding of the functions of the individual genes for fatty acid desaturases in cyanobacteria and plants led to the directed mutagenesis of such genes that altered the membrane fluidity of cytoplasmic and thylakoid membranes. Characterization of the photosynthetic properties of the transformed cyanobacteria and higher plants revealed that lipid unsaturation is essential for protection of the photosynthetic machinery against environmental stresses, such as strong light, salt stress, and high and low temperatures. The unsaturation of fatty acids enhances the repair of the damaged photosystem II complex under stress conditions. In this review, we summarize the knowledge on the mechanisms that regulate membrane fluidity, on putative sensors that perceive changes in membrane fluidity, on genes that are involved in acclimation to new sets of environmental conditions, and on the influence of membrane properties on photosynthetic functions.

Original languageEnglish
Pages (from-to)489-509
Number of pages21
JournalPhotosynthesis research
Volume116
Issue number2-3
DOIs
Publication statusPublished - Apr 22 2013

Keywords

  • Cold stress
  • Cyanobacteria
  • Fatty acid desaturases
  • Membrane fluidity
  • Photosynthesis

ASJC Scopus subject areas

  • Biochemistry
  • Plant Science
  • Cell Biology

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