Fruit fly sleep protein peptides stop drug-resistant bacteria

Peptides target bacterial ribosomes

Scientists derived short antimicrobial peptides from Nemuri, a sleep-inducing protein found in the fruit fly Drosophila melanogaster. These Nemuri peptides successfully inhibited the growth of Escherichia coli and Staphylococcus aureus strains in lab settings. The compounds entered bacterial cells and accumulated specifically within ribosome- and RNA-rich regions without disrupting cell membranes substantially. This accumulation induced condensation-like remodeling of ribosome-rich regions which reduced ribosomal mobility inside the bacteria.

Mechanism suppresses protein synthesis

These peptides suppressed overall protein production in the microbes by binding widely to ribosomal surfaces and RNA molecules. This process effectively halted bacterial growth at concentrations close to those needed for inhibition. The study notes that these compounds showed low toxicity toward cultured insect and mammalian cells during testing. Additional research, such as assessments of effectiveness and security within animal subjects, must be conducted to investigate this possibility.

New approach against resistance

While antibiotic-resistant bacteria remain a worldwide health danger, these compounds operate via methods different from current antibiotics. The research is published in the journal Nature Communications by Suguru Nishinami and colleagues at the University of Tsukuba. The findings suggest that Nemuri peptides offer a starting point for developing new antimicrobial agents against resistant strains.