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Screening and Functional Analyses of Novel Cecropins from Insect Transcriptome
Lizhen Guo1,2, Min Tang1,3, Shiqi Luo1
1Department of Entomology, College of Plant Protection, China Agricultural University, Beijing 100193, China.
Insects
|October 27, 2023
Summary
Insects are a promising source for novel antimicrobial peptides (AMPs) to combat antibiotic resistance. Researchers discovered 108 Cecropin genes, with three peptides showing potent antibacterial activity and safety.
Area of Science:
- Microbiology
- Bioinformatics
- Genomics
Background:
- Antibiotic resistance poses a significant global health threat.
- Antimicrobial peptides (AMPs) offer a potential solution due to broad-spectrum activity and low resistance potential.
- Insects represent an underexplored reservoir for novel AMP discovery.
Purpose of the Study:
- To screen insect transcriptomes for novel antimicrobial peptides (AMPs), specifically Cecropins.
- To develop a high-throughput bioinformatic pipeline for AMP discovery.
- To validate the antimicrobial activity and safety of newly identified Cecropins.
Main Methods:
- Screening of the 1000 Insect Transcriptome Evolution (1KITE) dataset for Cecropin homologous genes.
- Bioinformatic analysis to identify and validate 108 Cecropin genes across major hexapod lineages.
- Synthesis and experimental validation (MIC, agar diffusion, hemolysis assays) of three novel Cecropin peptides.
Main Results:
- Identification of 108 Cecropin genes from 105 insect transcriptomes.
- Experimental confirmation of antimicrobial activity against Gram-negative bacteria for three synthesized Cecropin peptides.
- Demonstration of membrane disruption by the peptides and lack of cytotoxicity in hemolysis tests.
Conclusions:
- A high-throughput bioinformatic pipeline for AMP discovery using genomic resources has been established.
- Newly identified insect Cecropins exhibit potent antimicrobial activity and favorable safety profiles.
- This approach accelerates the discovery of novel AMPs to address the challenge of antibiotic resistance.
