Short Photoswitchable Antibacterial Peptides.

Abstract:

:Three photoswitchable tetrapeptides, based on a known synthetic antibacterial, were designed and synthesized to determine activity against Staphylococcus aureus. Each peptide contains an azobenzene photoswitch incorporated into either the N-terminal side chain (1), C-terminal side chain (2), or the C-terminus (3) to allow reversible switching between cis- and trans-enriched photostationary states. Biological assays revealed that the C-terminus azobenzene (3) possessed the most potent antibacterial activity, with an MIC of 1 μg/mL. In this study, net positive charge, hydrophobicity, position of the azobenzene, secondary structure, and amphiphilicity were all found to contribute to antibacterial activity, with each of these factors likely facilitating the peptide to disrupt the negatively charged bacterial lipid membrane. Hence, these short photoswitchable antibacterial tetrapeptides provide insights for the future design and synthesis of antibiotics targeting S. aureus.

journal_name

ChemMedChem

journal_title

ChemMedChem

authors

Yeoh YQ,Horsley JR,Yu J,Polyak SW,Jovcevski B,Abell AD

doi

10.1002/cmdc.202000280

subject

Has Abstract

pub_date

2020-08-19 00:00:00

pages

1505-1508

issue

16

eissn

1860-7179

issn

1860-7187

journal_volume

15

pub_type

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