Urea, at concentrations which do not interfere with bacterial growth, specifically inhibits the expression of catabolite sensitive operons. To search for the target and the mechanism of urea action we measured lactose (lac) and tryptophanase (tna) specific mRNA synthesis in vivo and in vitro. We show that urea acts by two different mechanisms at these two catabolite sensitive operons, resembling the manner in which catabolite repression regulates lac and tna. At the lac promoter, urea abolishes transcription initiation or blocks an early step in mRNA elongation without interfering with the binding of RNA polymerase and catabolite gene activator protein (CAP). At the tna promoter, urea does not abolish transcription initiation but could interfere with tnaC translation.
Download full-text PDF |
Source |
|---|---|
| http://dx.doi.org/10.1007/BF00391748 | DOI Listing |
Publication Analysis
Top Keywords
Similar Publications
Repurposing Dapagliflozin for Mitigation of the Kidney Injury Triggered by Cadmium in Rats: Role of Autophagy, Apoptosis, and the SIRT1/Nrf2/HO-1 Pathway.
Pharmaceuticals (Basel)
December 2024
Department of Pharmacology, Egyptian Drug Authority (EDA)-Formerly NODCAR, Giza 12654, Egypt.
The antioxidant/antiapoptotic features of dapagliflozin (DPG) have mediated its beneficial actions against several experimental models. However, no studies have been conducted to determine whether DPG mitigates the renal injury triggered by cadmium (Cd). Herein, DPG was studied for its potential to attenuate kidney damage in Cd-intoxicated rats, as well as to unravel the mechanisms involving oxidative events, autophagy, and apoptosis.
View Article and Find Full Text PDFDesign, Synthesis, and Biological Evaluation of Novel Urea-Containing Carnosic Acid Derivatives with Anticancer Activity.
Int J Mol Sci
December 2024
Laboratory of Pharmaceutical Chemistry, Faculty of Pharmacy, University of Coimbra, 3000-548 Coimbra, Portugal.
A series of novel carnosic acid derivatives incorporating urea moieties at the C-20 position was synthesized and evaluated for their antiproliferative activity against the HCT116 colorectal cancer cell line. Most derivatives demonstrated enhanced antiproliferative activity compared to that of carnosic acid . The most promising derivatives were tested in other colorectal cancer cell lines (SW480, SW620, and Caco-2), melanoma (A375), and pancreatic cancer (MiaPaca-2).
View Article and Find Full Text PDFCopper and zinc removal from anaerobic digestates via Sporosarcina pasteurii induced precipitation: Effect of volatile fatty acids on process performance.
J Environ Manage
January 2025
Université Paris Cité, Institut de physique du globe de Paris, CNRS, F-75005, Paris, France.
Microbial induced carbonate precipitation (MICP) shows great potential for metals recovery from secondary sources, which is vital for circular economy. This study explores the feasibility of using Sporosarcina pasteurii for MICP to recover copper (Cu) and zinc (Zn) from acidogenic anaerobic digestates at laboratory scale. Pre-cultured S.
View Article and Find Full Text PDFExploration of molecular interactions responsible for anti-inflammatory attributes of GI friendly micro-sized formulation of flurbiprofen and clove oil.
Inflammopharmacology
January 2025
Department of Pharmacology, Faculty of Pharmacy, The Islamia University of Bahawalpur, Punjab, 63100, Pakistan.
Clove oil obtained from Syzygium aromaticum (L.) is traditionally employed to treat inflammation associated with rheumatism, gastric disorders, and as an analgesic. Chemo-herbal combinations are known to have potent anti-inflammatory and analgesic effects, while mitigating the drug related side effects.
View Article and Find Full Text PDFAntihypertensive Effect of Perla and Esmeralda Barley ( L.) Sprouts in an Induction Model with L-NAME In Vivo.
Metabolites
December 2024
Academic Area of Medicine, Institute of Health Sciences, Autonomous University of the State of Hidalgo, Eliseo Ramírez Ulloa 400, Doctores Pachuca, Pachuca 42090, Hidalgo, Mexico.
Hypertension is one of the leading causes of premature death worldwide. Despite advances in conventional treatments, there remains a significant need for more effective and natural alternatives to control hypertension. In this context, sprouted barley extracts have emerged as a potential therapeutic option.
View Article and Find Full Text PDFWant AI Summaries of new PubMed Abstracts delivered to your In-box?
Enter search terms and have AI summaries delivered each week - change queries or unsubscribe any time!