Effect of nine different mono-frequency sound stimuli on two gram-negative bacteria (Pseudomonas aeruginosa and Serratia marcescens) was investigated. Frequency of the test sound ranged from 100 Hz – 2,000 Hz. Both the test bacteria responded differently to sonic stimulation. Sound corresponding to 600 HZ caused a notable reduction in quorum sensing (QS) regulated production of the pigment pyov...

Microorganisms and their metabolites have the potential to provide a sustainable alternative chemical insecticides. Serratia marcescens is an entomopathogenic bacterium that produces hydrolytic enzymes toxins. It also red pigment called prodigiosin, which has variety of biological properties. In this study, prodigiosin was extracted from S. Se9 isolate with acidified ethanol concentrated using ...

An amidopyrrole with appended imidazole group can bind and co-transport H+/Cl- across vesicle membranes much more effectively than an analogue with an appended pyridyl group.

Abstract The insecticides of microbial origin may be promising biocontrol agents to control pests. In this study, a major metabolite was extracted and purified from Serratia marcescens KH-001 identified as prodigiosin with molecule weight 324.2094, our primary aim evaluate the effects against Diaphorina citri Kuwayama (Hemiptera: Liviidae) in laboratory field. Toxicity nymphs increased increasi...

Serratia marcescens MSU97 was isolated from the Guayana region of Venezuela due to its ability to suppress plant-pathogenic oomycetes. Here, we report the genome sequence of MSU97, which produces various antibiotics, including the bacterial acetyl-coenzyme A (acetyl-CoA) carboxylase inhibitor andrimid, the chlorinated macrolide oocydin A, and the red linear tripyrrole antibiotic prodigiosin.

The spectral characteristics of prodigiosin in the visual range and the changes occurring in them through different concentration of the substance, polarity of solvent, and temperature have been studied. The conclusion has been reached that these changes are due to the existence of two forms of the pigment: monomeric — with a maximum at 460 m/x, and dimeric — with a maximum at 530 m/u. It is as...

Prodigiosin is a red pigment produced by Serratia marcescens strain. Bacterial prodigiosin and its synthetic derivatives are efficacious antioxidants proapoptotic agents. This study illustrates new approach for use of conjugated silver nanoparticles (PG-AgNP2) against cadmium chloride (CdCl2) induced neurotoxicity in rats. Rats were (ip) injected with Cd (6.5 mg/kg) 7 days or without PG-AgNP2 (...