Cited by 287Bacterial Genetics and BiotechnologyLipid Membrane Structure and BehaviorLipid metabolism and biosynthesis

The cis–trans isomerase of unsaturated fatty acids in Pseudomonas and Vibrio: biochemistry, molecular biology and physiological function of a unique stress adaptive mechanism

Heipieper, Hermann J, Meinhardt, Friedhelm, Segura, Ana·2003·FEMS Microbiology Letters

Abstract

Isomerization of cis to trans unsaturated fatty acids is a mechanism enabling Gram-negative bacteria belonging to the genera Pseudomonas and Vibrio to adapt to several forms of environmental stress. The extent of the isomerization apparently correlates with the fluidity effects caused, i.e. by an increase in temperature or the accumulation of membrane-toxic organic compounds. Trans fatty acids are generated by direct isomerization of the respective cis configuration of the double bond without a shift of its position. The conversion of cis unsaturated fatty acids to trans is apparently instrumental in the adaptation of membrane fluidity to changing chemical or physical parameters of the cellular environment. Such an adaptive mechanism appears to be an alternative way to regulate membrane fluidity when growth is inhibited, e.g. by high concentrations of toxic substances. The cis-trans isomerase (Cti) activity is constitutively present and is located in the periplasma, it requires neither ATP nor any other cofactor such as NAD(P)H or glutathione, and it operates in the absence of de novo synthesis of lipids. Its independence from ATP is in agreement with the negative free energy of the reaction. cti encodes a polypeptide with an N-terminal hydrophobic signal sequence, which is cleaved off during or shortly after the enzyme is transported across the cytoplasmic membrane to the periplasmic space. A functional heme-binding site of the cytochrome c-type was identified in the predicted Cti polypeptide and very recently, direct evidence was obtained that isomerization does not include a transient saturation of the double bond.

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Crossref · 10.1016/s0378-1097(03)00792-4

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  • Essential oils do not activate other enzymatic systems, such as the cis-trans isomerase that regulates the conversion of cis fatty acids into their trans isomers.

    “Conversely, EOs do not activate other enzymatic systems, such as the cis-trans isomerase that regulates the conversion of cis fatty acids into their trans isomers.”

    From Effect of essential oils on pathogenic bacteria (2013) · cites this paper as [78]

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Authors
Heipieper, H. J., Meinhardt, F., & Segura, A.
Affiliations
  • Helmholtz Centre for Environmental Research (DE)
  • University of Münster (DE)
  • Estación Experimental del Zaidín (ES)
Corresponding author
Heipieper, Hermann J
Venue
FEMS Microbiology Letters
Published
2003-12
Volume
229
Issue
1
Pages
1-7
ISSN
  • 0378-1097 (ISSN-L)
  • 1574-6968
OpenAlex
W2126843389
Cited by
287
References
50
Citations by year
2026: 7 · 2025: 10 · 2024: 10 · 2023: 8 · 2022: 13 · 2021: 15 · 2020: 13 · 2019: 15 · 2018: 16 · 2017: 10 · 2016: 11 · 2015: 17 · 2014: 18 · 2013: 16 · 2012: 11
FWCI
1.16
Type
journal article
Language
en
Open access
closed
Locations
  • FEMS Microbiology Letters (publishedVersion)
  • PubMed (publishedVersion)
Topics
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Genetics › Bacterial Genetics and Biotechnology
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Lipid Membrane Structure and Behavior
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Biochemistry › Lipid metabolism and biosynthesis
Keywords
unsaturated fatty acids, trans fatty acids, membrane fluidity, Pseudomonas, Vibrio, environmental stress adaptation, periplasmic enzymes, signal peptide, thermal adaptation
MeSH terms
Adaptation, Physiological, Environment, Fatty Acids, Unsaturated, Pseudomonas, Vibrio, cis-trans-Isomerases

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