Cited by 1,602Essential Oils and Antimicrobial ActivityAntimicrobial agents and applicationsAntimicrobial Peptides and Activities

The Phenolic Hydroxyl Group of Carvacrol Is Essential for Action against the Food-Borne Pathogen Bacillus cereus

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Ultee, A., Bennik, M. H. J., Moezelaar, R.·2002·Applied and Environmental Microbiology

Abstract

The natural antimicrobial compound carvacrol shows a high preference for hydrophobic phases. The partition coefficients of carvacrol in both octanol-water and liposome-buffer phases were determined (3.64 and 3.26, respectively). Addition of carvacrol to a liposomal suspension resulted in an expansion of the liposomal membrane. Maximum expansion was observed after the addition of 0.50 micromol of carvacrol/mg of L-alpha-phosphatidylethanolamine. Cymene, a biological precursor of carvacrol which lacks a hydroxyl group, was found to have a higher preference for liposomal membranes, thereby causing more expansion. The effect of cymene on the membrane potential was less pronounced than the effect of carvacrol. The pH gradient and ATP pools were not affected by cymene. Measurement of the antimicrobial activities of compounds similar to carvacrol (e.g., thymol, cymene, menthol, and carvacrol methyl ester) showed that the hydroxyl group of this compound and the presence of a system of delocalized electrons are important for the antimicrobial activity of carvacrol. Based on this study, we hypothesize that carvacrol destabilizes the cytoplasmic membrane and, in addition, acts as a proton exchanger, thereby reducing the pH gradient across the cytoplasmic membrane. The resulting collapse of the proton motive force and depletion of the ATP pool eventually lead to cell death.

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Crossref · 10.1128/aem.68.4.1561-1568.2002

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  • Thymol has similar antimicrobial activity to carvacrol against B. cereus, S. aureus and P. aeruginosa, even though its hydroxyl group is located in a different position.

    “Compared with carvacrol, thymol has similar antimicrobial activity against B. cereus, S. aureus and P. aeruginosa, even though its hydroxyl group is located in a different position [18,20].”

    From Effect of essential oils on pathogenic bacteria (2013) · cites this paper as [18]

  • Carvacrol is more effective than other essential oils, such as p-cymene.

    “For example, carvacrol is more effective than other EOs, such as p-cymene [12,18,19].”

    From Effect of essential oils on pathogenic bacteria (2013) · cites this paper as [18]

  • p-Cymene can increase the antimicrobial activity of other compounds, such as its derivative carvacrol.

    “p-cymene can also increase the antimicrobial activity of other compounds, such as its derivative carvacrol [18,23].”

    From Effect of essential oils on pathogenic bacteria (2013) · cites this paper as [18]

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Research works printed but not linked: 1

  1. [6]6. Conner, D. E. 1993. Naturally occurring compounds, p. 441-468. In P. M. Davidson and A. L. Branen (ed.), Antimicrobials in foods, 2nd ed. Marcel Dekker, Inc., New York, N.Y.

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Authors
Ultee, A., Bennik, M. H. J., & Moezelaar, R.
Affiliations
Wageningen University & Research (NL)
Venue
Applied and Environmental Microbiology
Published
2002-04
Volume
68
Issue
4
Pages
1561-1568
ISSN
  • 0099-2240 (ISSN-L)
  • 1098-5336
OpenAlex
W2105644826
Cited by
1,602
References
32
Citations by year
2026: 62 · 2025: 68 · 2024: 82 · 2023: 90 · 2022: 89 · 2021: 117 · 2020: 97 · 2019: 106 · 2018: 98 · 2017: 81 · 2016: 84 · 2015: 68 · 2014: 96 · 2013: 79 · 2012: 78
FWCI
25.45
Type
journal article
Language
en
Open access
Locations
  • Applied and Environmental Microbiology (publishedVersion)
  • Europe PMC (PubMed Central) (publishedVersion)
  • PubMed Central (publishedVersion)
  • PubMed (publishedVersion)
  • Socio-Environmental Systems Modeling (acceptedVersion)
  • Data Archiving and Networked Services (DANS) (submittedVersion, other-oa)
Topics
  • Life Sciences › Agricultural and Biological Sciences › Food Science › Essential Oils and Antimicrobial Activity
  • Physical Sciences › Chemistry › Organic Chemistry › Antimicrobial agents and applications
  • Life Sciences › Immunology and Microbiology › Microbiology › Antimicrobial Peptides and Activities
Keywords
carvacrol, cymene, Bacillus cereus, antimicrobial activity, phenolic hydroxyl groups, membrane permeabilization, proton motive force, ATP depletion, thymol, menthol, foodborne pathogens, hydrophobicity
MeSH terms
Cymenes, Adenosine Triphosphate, Anti-Bacterial Agents, Bacillus cereus, Cell Membrane, Food Microbiology, Hydrogen-Ion Concentration, Liposomes, Membrane Potentials, Microbial Sensitivity Tests, Phenols, Terpenes, Monoterpenes, Hydrophobic and Hydrophilic Interactions

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