Discovery and Characterization of an Atypical Crustin Antimicrobial Peptide from <i>Pollicipes pollicipes</i>

Discovery and Characterization of an Atypical Crustin Antimicrobial Peptide from <i>Pollicipes pollicipes</i>

Crustins are a family of antimicrobial peptides (AMPs) that play a pivotal role in the innate immune system of crustaceans. The discovery of novel AMPs from natural sources is crucial for expanding our current database of these peptides. Here, we identified and characterized a novel member of the cr...

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Bibliographic Details
Main Authors: Wei Zhang, Liumi Wei, Pengyu Chen, Biao Ning, Junjian Wang, Peng He, Chenjing Shang, Dahui Yu
Format: Article
Language:English
Published: MDPI AG 2024-11-01
Series:Marine Drugs
Subjects:
antimicrobial peptides
crustin
antibacterial mechanism
<i>Pollicipes pollicipes</i>
antibiotic
Online Access:https://www.mdpi.com/1660-3397/22/12/526
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Summary:Crustins are a family of antimicrobial peptides (AMPs) that play a pivotal role in the innate immune system of crustaceans. The discovery of novel AMPs from natural sources is crucial for expanding our current database of these peptides. Here, we identified and characterized a novel member of the crustin family, named <i>Pp</i>Crus-SWD1, derived from <i>Pollicipes pollicipes</i>. <i>Pp</i>Crus-SWD1 consists of 138 amino acids and contains eight cysteine residues that form a conserved ‘four-disulfide core’ structure. Our recombinant <i>Pp</i>Crus-SWD1 (r<i>Pp</i>Crus-SWD1) exhibited potent inhibitory activity against three Gram-positive bacteria (<i>Staphylococcus aureus</i>, <i>Bacillus</i> sp. T2, and <i>Streptococcus agalactiae</i>) and six Gram-negative bacteria (<i>Aeromonas hydrophila</i>, <i>Escherichia coli</i>, <i>Vibrio anguillarum</i>, <i>Vibrio alginolyticus</i>, <i>Vibrio parahemolyticus</i>, and <i>Acinetobacter</i> sp. L3), with minimum inhibitory concentrations ranging from 16 to 64 μM. Furthermore, r<i>Pp</i>Crus-SWD1 demonstrated binding affinity towards both bacteria and pathogen-associated molecular patterns (PAMPs), and damaged bacterial barrier. Additionally, it effectively inhibited alkaline protease activity in <i>S. aureus</i> and <i>V. alginolyticus</i> strains. These findings highlight the potential utility of this newly discovered crustin as an effective alternative to antibiotics.
ISSN:1660-3397

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