Table 5.
List of important organosulfur/isothiocyanate classes of plant-based antimicrobial agents reported and their sources, pathogenic targets, and mechanisms of action.
Bioactive Compound | Chemical Formula | PubChem CID | Chemical Structure * | Plant Source | Target Pathogen | Mode of Action | References |
---|---|---|---|---|---|---|---|
Allicin | C6H10OS2 | 65036 |
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Allium sativum L. |
Salmonella typhimurium, Staphylococcus aureus, Bacillus subtilis, Bacillus typhosus, Bacillus paratyphosus, Morganella morganii, Bacillus enteritidis, Shigella dysenteriae, Vibrio cholera, Escherichia. coli, Listeria monocytogenes, Helicobacter pylori, drug-resistant strains of Mycobacterium tuberculosis |
Sulfhydryl-dependent enzyme inhibitor, DNA/RNA synthesis inhibitor, inhibitor of acetyl-CoA synthases in yeasts |
[169,174,178,179] |
Ajoene | C9H14OS3 | 5386591 |
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Allium sativum L. | Campylobacter jejuni, Staphylococcus aureus, Escherichia coli, Helicobacter pylori | Sulfhydryl-dependent enzyme | [168,180] |
Sulforaphane | C6H11NOS2 | 5350 |
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Brassicaceae Burnett. |
Bacillus cereus, Escherichia coli | Membrane destruction, ATP synthase inhibitor, DNA/protein synthesis inhibitor | [181] |
Allyl isothiocyanates (AITCs) | C4H5NS | 5971 |
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Armoracia rusticana G.Gaertn., B.Mey., & Scherb. | Oral pathogens, Helicobacter pylori, Escherichia coli | Inhibition of urease, reducing the inflammatory component of Helicobacter infections, inhibition of ATP binding sites of P-ATPase in bacteria | [92,170] |
Benzyl isothiocyanate (BITC) | C8H7NS | 2346 |
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Alliaria petiolata (M.Bieb.) Cavara & Grande | Methicillin-resistant Staphylococcus aureus | Disruption of membrane integrity | [176] |
Phenethyl isothiocyanate(PEITC) | C9H9NS | 16741 |
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Brassica campestris L., Brassica rapa L. |
Gram-positive bacteria | Intracellular accumulation of reactive oxygen species (ROS), depolarization of mitochondrial membrane | [92,182] |
Berteroin | C7H13NS2 | 206037 |
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Brassica oleracea L. | Bacillus subtilis, Escherichia coli, Helicobacter pylori | NA | [93] |
Cheirolin | C5H9NO2S2 | 10454 |
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Cheiranthus cheiri L. | Helicobacter pylori | NA | [134] |
Alyssin | C7H13NOS2 | 206035 |
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Alyssum L. sp. | Helicobacter pylori | NA | [134] |
* Chemical structures of compounds have been taken from PubChem; www.pubchem.ncbi.nlm.nih.gov (Accessed on 10 December 2022).