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Antibacterial mechanism of the Asp - Asp - Asp - Tyr peptide

ABSTRACT: This SuperSeries is composed of the SubSeries listed below.

ORGANISM(S): Escherichia coli Pseudomonas aeruginosa

PROVIDER: GSE192347 | GEO | 2021/12/24

REPOSITORIES: GEO

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Antibacterial mechanism of the Asp - Asp - Asp - Tyr peptide [P. aeruginosa]

Project description:Previously, we found that ASP-ASP-ASP-TYR (DDDY) from Dendrobium aphyllum has a minimum inhibitory concentration of 36.15 mg/mL against Pseudomonas aeruginosa. Here, we explored the antibacterial mechanism of DDDY and its potential preservation applications. Metabolomic and transcriptomic analyses revealed that DDDY mainly affects genes involved in P. aeruginosa membrane transport and amino acid metabolism pathways. Molecular dynamics simulation revealed that DDDY had a stronger effect on 1-palmitoyl-2-oleoyl-sn-glycero-3-phosphoethanolamine phospholipid membranes than on 1-palmitoyl-2-oleoyl-lecithin or 1-palmitoyl-2-oleoyl phosphatidylglycerol membranes, with high DDDY concentrations displaying stronger efficacy on 1-palmitoyl-2-oleoyl-sn-glycero-3-phosphoethanolamine. Mechanistically, the N-terminal of DDDY first bound to the phospholipid head group, while its C-terminal amino acid residue bound the hydrophobic tail, thereby creating a gap in the membrane when the phospholipids were clustered by hydrogen bonding. Finally, DDDY inhibited the growth of food microorganisms inoculated onto chestnut kernels, suggesting that DDDY is a promising antibacterial agent against multidrug-resistant gram-negative bacteria. Inhibitory effect of ASP-ASP-ASP-TYR (DDDY) from Dendrobium on Pseudomonas aeruginosa

2021-12-24 | GSE192340 | GEO

Antibacterial mechanism of peptide Asp-Tyr-Asp-Asp based on multiomics and molecular dynamics [E. coli]

Project description:In this study, the mechanism of action of the small molecular peptide (DYDD) exhibiting antibacterial properties the application of the peptide in the field of food preservation have been presented. Metabolomics and transcriptomic techniques were used to analyze the metabolic effects of DYDD on E. coli. The differential metabolite screening and cluster analysis techniques were used for analyzing the data. It was found that DYDD could up-regulate 44 metabolites, down-regulate 105 metabolites and DYDD primarily affected 35 metabolic pathways in E. coli. Combined with transcriptome analysis, DYDD primarily influenced the metabolic pathways of E. coli by regulating the genes participating in the amino acid metabolic pathways and sulfur metabolic pathways. Then, the effects of DYDD on POPC-, POPE-, and POPG-based membranes were analyzed using the molecular dynamics simulation. The results showed that DYDD had the strongest binding with Pope membrane, and the insertion of DYDD not only led to the disorder of phospholipid head groups, but also increased the surface area and permeability of the membrane. Finally, DYDD was applied to chestnut kernel infected by E. coli. The results showed that DYDD had good antibacterial effect, could delay the decay and browning of chestnut kernel, and had fresh-keeping effect.

2021-12-24 | GSE192346 | GEO

Antibacterial mechanism of the Asp - Asp - Asp - Tyr peptide

Project description:Antibacterial mechanism of the Asp - Asp - Asp - Tyr peptide

| PRJNA791217 | ENA

Antibacterial mechanism of the Asp - Asp - Asp - Tyr peptide [P. aeruginosa]

Project description:Antibacterial mechanism of the Asp - Asp - Asp - Tyr peptide [P. aeruginosa]

| PRJNA791212 | ENA