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Current Pharmaceutical Biotechnology

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ISSN (Print): 1389-2010
ISSN (Online): 1873-4316

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Research Article

Antibacterial Potential of a Novel Peptide from the Consensus Sequence of Dermaseptin Related Peptides Secreted by Agalychnis annae

Author(s): Ya’u Sabo Ajingi, Auwal Muhammad, Pongsak Khunrae, Triwit Rattanarojpong, Kovit Pattanapanyasat, Thana Sutthibutpong and Nujarin Jongruja*

Volume 22, Issue 9, 2021

Published on: 20 October, 2020

Page: [1216 - 1227] Pages: 12

DOI: 10.2174/1389201021666201020161428

Price: $65

Abstract

Background: The consistently increasing reports of bacterial resistance and the reemergence of bacterial epidemics have inspired the health and scientific community to discover new molecules with antibacterial potential continuously. Frog-skin secretions constitute bioactive compounds essential for finding new biopharmaceuticals. The exact antibacterial characterization of dermaseptin related peptides derived from Agalychnis annae, is limited. The resemblance in their conserved and functionally linked genomes indicates an unprecedented opportunity to obtain novel bioactive compounds.

Objective: In this study, we derived a novel peptide sequence and determined its antibacterial potentials.

Methods: Consensus sequence strategy was used to design the novel and active antibacterial peptide named 'AGAAN' from skin secretions of Agalychnis annae. The in-vitro activities of the novel peptide against some bacterial strains were investigated. Time kill studies, DNA retardation, cytotoxicity, betagalactosidase, and molecular computational studies were conducted.

Results: AGAAN inhibited P. aeruginosa, E. faecalis, and S. typhimurium at 20 μM concentration. E. coli and S. aureus were inhibited at 25 μM, and lastly, B. subtilis at 50 μM. Kinetics of inactivation against exponential and stationary growing bacteria was found to be rapid within 1-5 hours of peptide exposure, depending on time and concentration. The peptide displayed weak hemolytic activity between 0.01%-7.31% at the antibacterial concentrations. AGAAN efficiently induced bacterial membrane damage with subsequent cell lysis. The peptide's DNA binding shows that it also targets intracellular DNA by retarding its movement. Our in-silico molecular docking analysis displayed a strong affinity to the bacterial cytoplasmic membrane.

Conclusion: AGAAN exhibits potential antibacterial properties that could be used to combat bacterial resistance.

Keywords: Antibacterial peptide, bacterial resistance, Frogskin secretions, Agalychnis annae, consensus sequence, dermaseptin related peptides.

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