Retapamulin inhibition of translation and 50S ribosomal subunit formation in Staphylococcus aureus cells.

Antimicrob Agents Chemother

Department of Biochemistry and Molecular Biology, J. H. Quillen College of Medicine, East Tennessee State University, Johnson City, TN 37614, USA.

Published: September 2007

Retapamulin inhibited protein biosynthesis and cell viability in methicillin-sensitive and methicillin-resistant Staphylococcus aureus organisms. A specific inhibitory effect on 50S ribosomal subunit formation was also found. Pulse-chase labeling experiments confirmed the specific inhibition of 50S subunit biogenesis. Turnover of 23S rRNA was found, with no effect on 16S rRNA amounts.

Download full-text PDF

Source
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC2043230PMC
http://dx.doi.org/10.1128/AAC.00475-07DOI Listing

Publication Analysis

Top Keywords

50s ribosomal
8
ribosomal subunit
8
subunit formation
8
staphylococcus aureus
8
retapamulin inhibition
4
inhibition translation
4
translation 50s
4
formation staphylococcus
4
aureus cells
4
cells retapamulin
4

Similar Publications

Kidney Targeting Smart Antibiotic Discovery: Multimechanism Pleuromutilins for Pyelonephritis Therapy.

J Med Chem

January 2025

Xi'an Key Laboratory for Antiviral and Antimicrobial-Resistant Bacteria Therapeutics Research, Xi'an 710021, China.

Multidrug-resistant (MDR) bacteria pose a global health threat, underscoring the need for new antibiotics. Lefamulin, the first novel-mechanism antibiotic approved by the FDA in decades, showcases pleuromutilins' promise due to low mutation frequency. However, their clinical use is limited by poor pharmacokinetics and organ toxicity.

View Article and Find Full Text PDF

African swine fever (ASF), caused by African swine fever virus (ASFV), is a highly contagious disease with devastating effects on the global pig industry. This warrants the development of effective control strategies, such as vaccines. However, previously developed inactivated vaccines have proven ineffective, while live-attenuated vaccines carry inherent safety risks.

View Article and Find Full Text PDF

The proline-rich antimicrobial designer peptide Api137 inhibits protein expression in bacteria by binding simultaneously to the ribosomal polypeptide exit tunnel and the release factor (RF), depleting the cellular RF pool and leading to ribosomal arrest at stop codons. This study investigates the additional effect of Api137 on the assembly of ribosomes using an Escherichia coli reporter strain expressing one ribosomal protein per 30S and 50S subunit tagged with mCherry and EGFP, respectively. Separation of cellular extracts derived from cells exposed to Api137 in a sucrose gradient reveals elevated levels of partially assembled and not fully matured precursors of the 50S subunit (pre-50S).

View Article and Find Full Text PDF
Article Synopsis
  • RbgA is a GTPase that plays a crucial role in the maturation of the 50S ribosomal subunit, favoring its GTP-bound state over the GDP-bound state due to conformational differences.
  • All-atom molecular dynamics simulations revealed significant conformational changes in RbgA depending on the bound nucleotide, particularly under GTP-Mg and GMPPNP-Mg conditions, which may impact its function.
  • The study identifies key regions that influence RbgA's ribosome association and suggests that understanding these mechanisms can help develop new chemical agents to regulate ribosome biogenesis.
View Article and Find Full Text PDF

Transcriptional Analysis and Identification of a Peptidoglycan Hydrolase (PGH) and a Ribosomal Protein with Antimicrobial Activity Produced by .

Int J Mol Sci

November 2024

Departamento de Biotecnología, Universidad Autónoma Metropolitana Unidad Iztapalapa, Av. San Rafael Atlixco 186, Col. Vicentina, Mexico City 09340, Mexico.

Article Synopsis
  • The study addresses the urgent issue of antibiotic resistance by exploring new antimicrobial agents like peptidoglycan hydrolases (PGHs) and ribosomal proteins.
  • A strain isolated from fermented meat showed significant antimicrobial activity against various pathogens, with optimal results at high nitrogen levels (5.7 g/L).
  • Two proteins, RP uL14 and MupG, were identified and their production was influenced by nitrogen and carbon concentrations, emphasizing the role of nutritional sources in developing new antimicrobial solutions.
View Article and Find Full Text PDF

Want 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!