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Enhancing Antimicrobial Peptide Activity through Modifications of Charge, Hydrophobicity, and Structure
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Enhancing Antimicrobial Peptide Activity through Modifications of Charge, Hydrophobicity, and Structure
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Journal Article
Enhancing Antimicrobial Peptide Activity through Modifications of Charge, Hydrophobicity, and Structure
2024
Overview
Antimicrobial peptides (AMPs) are emerging as a promising alternative to traditional antibiotics due to their ability to disturb bacterial membranes and/or their intracellular processes, offering a potential solution to the growing problem of antimicrobial resistance. AMP effectiveness is governed by factors such as net charge, hydrophobicity, and the ability to form amphipathic secondary structures. When properly balanced, these characteristics enable AMPs to selectively target bacterial membranes while sparing eukaryotic cells. This review focuses on the roles of positive charge, hydrophobicity, and structure in influencing AMP activity and toxicity, and explores strategies to optimize them for enhanced therapeutic potential. We highlight the delicate balance between these properties and how various modifications, including amino acid substitutions, peptide tagging, or lipid conjugation, can either enhance or impair AMP performance. Notably, an increase in these parameters does not always yield the best results; sometimes, a slight reduction in charge, hydrophobicity, or structural stability improves the overall AMP therapeutic potential. Understanding these complex interactions is key to developing AMPs with greater antimicrobial activity and reduced toxicity, making them viable candidates in the fight against antibiotic-resistant bacteria.
Publisher
MDPI AG,MDPI
Subject
/ Animals
/ Anti-Bacterial Agents - chemistry
/ Anti-Bacterial Agents - pharmacology
/ Antimicrobial Cationic Peptides - chemistry
/ Antimicrobial Cationic Peptides - pharmacology
/ Antimicrobial Peptides - chemistry
/ Antimicrobial Peptides - pharmacology
/ Bacteria
/ Humans
/ Hydrophobic and Hydrophilic Interactions
/ Peptides
/ Review
/ Structure-Activity Relationship
/ Toxicity
